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Posted to user@jmeter.apache.org by Toni Menendez Lopez <to...@gmail.com> on 2009/02/24 16:41:40 UTC
Use jmeter in multiple CPUs
Hello, every body....
Just one question, Is it possible to send jmeter to work in multiple CPUs as
a single process, or I have to send a process for each CPU ?
Toni.
Re: Use jmeter in multiple CPUs
Posted by Toni Menendez Lopez <to...@gmail.com>.
Finally I did the similar thing..
I create like 10 instances of Jmeter working un no-gui mode, and now is
working, but I have to modify the PermSize of JMeter and adapt to my case,
after executing Jconsole.
Thanks for the help,
Toni.
2009/2/26 sebb <se...@gmail.com>
> On 26/02/2009, kirk <ki...@kodewerk.com> wrote:
> > Oliver Erlewein [DATACOM] wrote:
> >
> > > Hi Toni,
> > >
> > > Just some things I’ve noticed with JMeter/Java...
> > >
> > > a) One JVM only supports 2000 concurrent TCP connections. Check your
> > Time_wait states!
> > > b) Using HTTPS I've determined that about 70 threads per JVM is about
> the
> > max you should do although I haven't investigated it into much detail.
> Seems
> > to be pretty independent of processing power. I don't know the value for
> > HTTP.
> > >
> > > Because of such issues I've written my own distributed test harness for
> > JMeter. What I basically do is start separate instances of JMeter and let
> > them execute at predetermined times. What I've noticed though is, that
> > although one JVM/JMeter client can't go above 70 threads I can run
> multiple
> > of these on one machine (P4HT 3Ghz). So far I've tried 3 concurrent. That
> to
> > me shows that the treading used by Java is not as efficient as the Linux
> > threading/multitasking.
>
> The maximum number of threads will depend a lot on the test plan. Some
> elements take much more memory that others.
>
> I've certainly used 200+ threads with just a Java Request sampler
> without problems.
>
> When you say that 70 threads is the maximum, what is the limiting factor?
> I.e. what happens when you add more threads?
>
> > >
> > >
> > I would suggest something other than Java's threading is involved. I've
> > used 1000's of threads (limited by memory) in a Java application. In
> fact, I
> > had 250,000 open sockets from 4 machines talking to a single JVM for a
> total
> > of 1,000,000 socket connections all running on RH4 installs. I did *not*
> use
> > JMeter for this stress test as the application used Mina and Mina/JMeter
> > don't seem to mix well.
> >
> > Regards,
> > Kirk
> >
> >
> > ---------------------------------------------------------------------
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> > jmeter-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail:
> > jmeter-user-help@jakarta.apache.org
> >
> >
>
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>
RE: Use jmeter in multiple CPUs
Posted by "Oliver Erlewein [DATACOM]" <Ol...@datacom.co.nz>.
@Sebb:
Yes, you're completely right it does depend on the...
a) Hardware
b) allocated memory
c) JMeter script
d) HTTP/HTTPS
So the 70 is with my not so elegant script and HTTPS. After that I start seeing delays in the response times that are not sourced at the application under test. I must also admit that those numbers were last tested with JMeter 2.1.1 Maybe 2.3+ can do more. I don't know. If I find the time I can try and run some tests on this.
Cheers Oliver
-----Original Message-----
From: sebb [mailto:sebbaz@gmail.com]
Sent: Friday, 27 February 2009 2:31 a.m.
To: JMeter Users List
Subject: Re: Use jmeter in multiple CPUs
On 26/02/2009, kirk <ki...@kodewerk.com> wrote:
> Oliver Erlewein [DATACOM] wrote:
>
> > Hi Toni,
> >
> > Just some things I’ve noticed with JMeter/Java...
> >
> > a) One JVM only supports 2000 concurrent TCP connections. Check your
> Time_wait states!
> > b) Using HTTPS I've determined that about 70 threads per JVM is about the
> max you should do although I haven't investigated it into much detail. Seems
> to be pretty independent of processing power. I don't know the value for
> HTTP.
> >
> > Because of such issues I've written my own distributed test harness for
> JMeter. What I basically do is start separate instances of JMeter and let
> them execute at predetermined times. What I've noticed though is, that
> although one JVM/JMeter client can't go above 70 threads I can run multiple
> of these on one machine (P4HT 3Ghz). So far I've tried 3 concurrent. That to
> me shows that the treading used by Java is not as efficient as the Linux
> threading/multitasking.
The maximum number of threads will depend a lot on the test plan. Some
elements take much more memory that others.
I've certainly used 200+ threads with just a Java Request sampler
without problems.
When you say that 70 threads is the maximum, what is the limiting factor?
I.e. what happens when you add more threads?
> >
> >
> I would suggest something other than Java's threading is involved. I've
> used 1000's of threads (limited by memory) in a Java application. In fact, I
> had 250,000 open sockets from 4 machines talking to a single JVM for a total
> of 1,000,000 socket connections all running on RH4 installs. I did *not* use
> JMeter for this stress test as the application used Mina and Mina/JMeter
> don't seem to mix well.
>
> Regards,
> Kirk
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail:
> jmeter-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail:
> jmeter-user-help@jakarta.apache.org
>
>
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Re: Use jmeter in multiple CPUs
Posted by sebb <se...@gmail.com>.
On 26/02/2009, kirk <ki...@kodewerk.com> wrote:
> Oliver Erlewein [DATACOM] wrote:
>
> > Hi Toni,
> >
> > Just some things I’ve noticed with JMeter/Java...
> >
> > a) One JVM only supports 2000 concurrent TCP connections. Check your
> Time_wait states!
> > b) Using HTTPS I've determined that about 70 threads per JVM is about the
> max you should do although I haven't investigated it into much detail. Seems
> to be pretty independent of processing power. I don't know the value for
> HTTP.
> >
> > Because of such issues I've written my own distributed test harness for
> JMeter. What I basically do is start separate instances of JMeter and let
> them execute at predetermined times. What I've noticed though is, that
> although one JVM/JMeter client can't go above 70 threads I can run multiple
> of these on one machine (P4HT 3Ghz). So far I've tried 3 concurrent. That to
> me shows that the treading used by Java is not as efficient as the Linux
> threading/multitasking.
The maximum number of threads will depend a lot on the test plan. Some
elements take much more memory that others.
I've certainly used 200+ threads with just a Java Request sampler
without problems.
When you say that 70 threads is the maximum, what is the limiting factor?
I.e. what happens when you add more threads?
> >
> >
> I would suggest something other than Java's threading is involved. I've
> used 1000's of threads (limited by memory) in a Java application. In fact, I
> had 250,000 open sockets from 4 machines talking to a single JVM for a total
> of 1,000,000 socket connections all running on RH4 installs. I did *not* use
> JMeter for this stress test as the application used Mina and Mina/JMeter
> don't seem to mix well.
>
> Regards,
> Kirk
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail:
> jmeter-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail:
> jmeter-user-help@jakarta.apache.org
>
>
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RE: Use jmeter in multiple CPUs
Posted by "Oliver Erlewein [DATACOM]" <Ol...@datacom.co.nz>.
Hi Kirk,
I use JMeter/Java in a very loose context. It can be any of the API's or other projects JMeter draws upon. There is some limit at 2000 connections wherever it may come from. Depending on your OS set-up this will have an impact or not. As I said I didn't investigate this in too much detail. I'm not that clever ;-)
Cheers Oliver
-----Original Message-----
From: kirk [mailto:kirk@kodewerk.com]
Sent: Thursday, 26 February 2009 7:29 p.m.
To: JMeter Users List
Subject: Re: Use jmeter in multiple CPUs
Oliver Erlewein [DATACOM] wrote:
> Hi Toni,
>
> Just some things I’ve noticed with JMeter/Java...
>
> a) One JVM only supports 2000 concurrent TCP connections. Check your Time_wait states!
> b) Using HTTPS I've determined that about 70 threads per JVM is about the max you should do although I haven't investigated it into much detail. Seems to be pretty independent of processing power. I don't know the value for HTTP.
>
> Because of such issues I've written my own distributed test harness for JMeter. What I basically do is start separate instances of JMeter and let them execute at predetermined times. What I've noticed though is, that although one JVM/JMeter client can't go above 70 threads I can run multiple of these on one machine (P4HT 3Ghz). So far I've tried 3 concurrent. That to me shows that the treading used by Java is not as efficient as the Linux threading/multitasking.
>
I would suggest something other than Java's threading is involved. I've
used 1000's of threads (limited by memory) in a Java application. In
fact, I had 250,000 open sockets from 4 machines talking to a single JVM
for a total of 1,000,000 socket connections all running on RH4 installs.
I did *not* use JMeter for this stress test as the application used Mina
and Mina/JMeter don't seem to mix well.
Regards,
Kirk
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Re: Use jmeter in multiple CPUs
Posted by kirk <ki...@kodewerk.com>.
Oliver Erlewein [DATACOM] wrote:
> Hi Toni,
>
> Just some things I’ve noticed with JMeter/Java...
>
> a) One JVM only supports 2000 concurrent TCP connections. Check your Time_wait states!
> b) Using HTTPS I've determined that about 70 threads per JVM is about the max you should do although I haven't investigated it into much detail. Seems to be pretty independent of processing power. I don't know the value for HTTP.
>
> Because of such issues I've written my own distributed test harness for JMeter. What I basically do is start separate instances of JMeter and let them execute at predetermined times. What I've noticed though is, that although one JVM/JMeter client can't go above 70 threads I can run multiple of these on one machine (P4HT 3Ghz). So far I've tried 3 concurrent. That to me shows that the treading used by Java is not as efficient as the Linux threading/multitasking.
>
I would suggest something other than Java's threading is involved. I've
used 1000's of threads (limited by memory) in a Java application. In
fact, I had 250,000 open sockets from 4 machines talking to a single JVM
for a total of 1,000,000 socket connections all running on RH4 installs.
I did *not* use JMeter for this stress test as the application used Mina
and Mina/JMeter don't seem to mix well.
Regards,
Kirk
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RE: Use jmeter in multiple CPUs
Posted by "Oliver Erlewein [DATACOM]" <Ol...@datacom.co.nz>.
Hi Toni,
Just some things I’ve noticed with JMeter/Java...
a) One JVM only supports 2000 concurrent TCP connections. Check your Time_wait states!
b) Using HTTPS I've determined that about 70 threads per JVM is about the max you should do although I haven't investigated it into much detail. Seems to be pretty independent of processing power. I don't know the value for HTTP.
Because of such issues I've written my own distributed test harness for JMeter. What I basically do is start separate instances of JMeter and let them execute at predetermined times. What I've noticed though is, that although one JVM/JMeter client can't go above 70 threads I can run multiple of these on one machine (P4HT 3Ghz). So far I've tried 3 concurrent. That to me shows that the treading used by Java is not as efficient as the Linux threading/multitasking.
If you had this kind of set-up the question about distributing to multiple processors would be mute because you could do one JVM per processor (or even more than that if you like). That then finally maxes out the CPU! Ask my electrician! I flipped the circuits in our server room a couple of times with my harness going full blast. ;-)
This set-up also gives you the ability to execute different scripts at the same time without having to have everything in one script.
My 2ct. Hope it helps.
Cheers
Oliver
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Re: Use jmeter in multiple CPUs
Posted by Toni Menendez Lopez <to...@gmail.com>.
I have done the kill _QUIT !!!
Let me know if you find something strange ?
Toni.
2009/2/25 kirk <ki...@kodewerk.com>
> Hi Toni,
>
> Something appears to be artificially throttling your threads. Can you
> create a thread dump? kill -QUIT pid should do it. I've not seen RH limit
> threads to this extent, not without seeing system times significantly
> higher.
>
> Regards,
> Kirk
>
>
> Toni Menendez Lopez wrote:
>
>> 1st.- CPU usage .-
>> 12:31:54 PM CPU %user %nice %system %iowait %idle
>> 12:31:56 PM all 28.62 0.00 0.50 0.12 70.75
>> 12:31:56 PM 0 31.16 0.00 0.50 0.00 68.34
>> 12:31:56 PM 1 22.11 0.00 0.50 0.00 77.39
>> 12:31:56 PM 2 30.35 0.00 1.00 0.00 68.66
>> 12:31:56 PM 3 30.00 0.00 0.50 1.00 68.50
>> 12:31:56 PM CPU %user %nice %system %iowait %idle
>> 12:31:58 PM all 31.09 0.12 0.75 0.00 68.04
>> 12:31:58 PM 0 33.33 0.00 1.00 0.00 65.67
>> 12:31:58 PM 1 29.70 0.50 0.00 0.00 69.80
>> 12:31:58 PM 2 24.00 0.00 1.00 0.00 75.00
>> 12:31:58 PM 3 38.00 0.00 0.50 0.00 61.50
>> 12:31:58 PM CPU %user %nice %system %iowait %idle
>> 12:32:00 PM all 29.00 0.00 0.38 0.38 70.25
>> 12:32:00 PM 0 37.50 0.00 1.00 0.00 61.50
>> 12:32:00 PM 1 20.60 0.00 0.50 0.00 78.89
>> 12:32:00 PM 2 26.13 0.00 0.00 1.01 72.86
>> 12:32:00 PM 3 31.34 0.00 0.50 0.00 68.16
>> 12:32:00 PM CPU %user %nice %system %iowait %idle
>> 12:32:02 PM all 28.00 0.00 0.25 0.00 71.75
>> 12:32:02 PM 0 33.33 0.00 0.50 0.00 66.17
>> 12:32:02 PM 1 34.33 0.00 0.50 0.00 65.17
>> 12:32:02 PM 2 40.00 0.00 0.00 0.00 60.00
>> 12:32:02 PM 3 5.00 0.00 0.00 0.00 95.00
>> 12:32:02 PM CPU %user %nice %system %iowait %idle
>> 12:32:04 PM all 28.80 0.00 0.37 0.00 70.82
>> 12:32:04 PM 0 30.50 0.00 0.50 0.00 69.00
>> 12:32:04 PM 1 28.64 0.00 0.00 0.00 71.36
>> 12:32:04 PM 2 22.89 0.00 1.00 0.00 76.12
>> 12:32:04 PM 3 32.66 0.00 0.00 0.00 67.34
>> Average: CPU %user %nice %system %iowait %idle
>> Average: all 28.74 0.02 0.44 0.10 70.70
>> Average: 0 33.38 0.00 0.65 0.20 65.77
>> Average: 1 27.59 0.05 0.35 0.00 72.01
>> Average: 2 25.72 0.05 0.45 0.10 73.68
>> Average: 3 28.24 0.05 0.30 0.10 71.31
>>
>> 2.- About transactions....
>>
>> 420KB.seg = 3360Kb/s = 3Mb/s ( so it is not a problem of network ).
>>
>> 3.- The only way to increase the trhoughput is to download the PermSize in
>> JVM, and in this case I can download the CPU usage and after increase the
>> trhoughput. But, I am never able to increase more than 25% of CPU...
>>
>>
>> 4.- I will check if it is a limitation of OS, I am using RHEL4.5
>>
>> 2009/2/25 Thomas Johnson <nt...@gmail.com>
>>
>>
>>
>>> Hmm, just ignoring jconsole for a moment, what does your OS say about
>>> its CPU usage? Does top, prstat, acitivity monitor, or task manager
>>> show that your Java process is also using 25% CPU? Is that 25%
>>> combined, or is that just User space, not counting time in Kernel
>>> space?
>>>
>>> Once again, I'd just like to rule out a bottleneck at the network
>>> level. Can you check how much bandwidth you're using, and compare it
>>> to the amount of bandwidth that's available on your network? How large
>>> are the transactions? 100tx/sec multiplied by (arbitrary) 100
>>> kilobytes per transaction is a full 10 MBps, which will easily
>>> saturate a 100Mbps ethernet link.
>>>
>>> Also, does changing the thread count do anything to your Transaction
>>> rate? Do you still only get 100 tx/sec if you increase the thread
>>> count? What is the impact on your CPU usage when you double the thread
>>> countL
>>>
>>> Also, do you know if your system policy is limiting your resource
>>> usage to a given percentage?
>>>
>>> On Wed, Feb 25, 2009 at 11:46 AM, Toni Menendez Lopez
>>> <to...@gmail.com> wrote:
>>>
>>>
>>>> I am testing a Huge platform that is able to get like 5000reqxseg, and
>>>>
>>>>
>>> now I
>>>
>>>
>>>> am only sending 100reqxseg, so my Load is doing nothing to the Tested
>>>> server.
>>>>
>>>> About logs, I am not writing any logs in my jmeter...
>>>>
>>>> May main question, and I am not able to find a solution, and I am
>>>>
>>>>
>>> browsing
>>>
>>>
>>>> in google is why with jconsole the CPU of the JVM is not able to go
>>>>
>>>>
>>> further
>>>
>>>
>>>> than 25% even when I have much free CPU.
>>>>
>>>> Toni.
>>>>
>>>> 2009/2/25 Thomas Johnson <nt...@gmail.com>
>>>>
>>>>
>>>>
>>>>> Just curious -- what kind of system are you testing?
>>>>>
>>>>> Are you doing tests against a website? You might be hitting bandwidth
>>>>> limitations, meaning that the test machine's CPU has nothing to do
>>>>> while it waits for the network. If you are running the server on the
>>>>> same system, the server might be eating the other 75% of the CPU.
>>>>>
>>>>> Also, if you are logging data, what kind of device are you writing
>>>>> logs to? Is it a local hard drive, or a networked drive?
>>>>>
>>>>> On Wed, Feb 25, 2009 at 11:17 AM, Toni Menendez Lopez
>>>>> <to...@gmail.com> wrote:
>>>>>
>>>>>
>>>>>> OK, I have a look to the links and still thinks that I don´t
>>>>>>
>>>>>>
>>>>> underestand
>>>
>>>
>>>> quite well, I explain to you :
>>>>>>
>>>>>> After lloking in the CPU´s in OS I can see that the threads are spread
>>>>>>
>>>>>>
>>>>> in
>>>
>>>
>>>> all CPU´s look attachment ( CPU.jpg ).
>>>>>>
>>>>>> After this I tried to check the JVM working mode and I go to jconsole,
>>>>>>
>>>>>>
>>>>> and
>>>>>
>>>>>
>>>>>> now in this case I am not able to get more than 25% of CPU, look the
>>>>>> graph... (jconsole.jpg)
>>>>>>
>>>>>> Do you have any idea why the JVM of the jmeter is not able to go
>>>>>>
>>>>>>
>>>>> further
>>>
>>>
>>>> than 25% ?
>>>>>>
>>>>>>
>>>>>> Toni.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> 2009/2/25 <da...@davidwbrown.name>
>>>>>>
>>>>>> Hello Toni, I think Sebb et. al. was trying to get you to understand
>>>>>>
>>>>>>
>>>>> the
>>>
>>>
>>>> complexities of the JVM (see link). Even ANSI C daemons that clone
>>>>>>> themselves and spawn off all new OS processes don't really get
>>>>>>>
>>>>>>>
>>>>>> involved
>>>
>>>
>>>> with
>>>>>
>>>>>
>>>>>> hardware CPUs as a plural concern.
>>>>>>>
>>>>>>> http://www.mindprod.com/jgloss/jvm.html
>>>>>>>
>>>>>>>
>>>>>>> Secondly, if you are concerned with JMeter and performance testing
>>>>>>>
>>>>>>>
>>>>>> and
>>>
>>>
>>>> the
>>>>>
>>>>>
>>>>>> performance of JMeter itself during serious application testing take
>>>>>>>
>>>>>>>
>>>>>> a
>>>
>>>
>>>> look
>>>>>
>>>>>
>>>>>> at this link:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>> http://jakarta.apache.org/jmeter/usermanual/jmeter_distributed_testing_step_by_step.pdf
>>>
>>>
>>>> Toni Menendez Lopez wrote ..
>>>>>>> > But normal behaviour of Jmeter if I don´t change anything , does
>>>>>>>
>>>>>>>
>>>>>> not
>>>
>>>
>>>> permit
>>>>>>>
>>>>>>>
>>>>>>>> multi-cpu, isn´t it ?
>>>>>>>>
>>>>>>>> Toni.
>>>>>>>>
>>>>>>>> 2009/2/24 Toni Menendez Lopez <to...@gmail.com>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>> Just any clue where to find ?
>>>>>>>>>
>>>>>>>>> Toni.
>>>>>>>>>
>>>>>>>>> 2009/2/24 sebb <se...@gmail.com>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> Check the JVM documentation?
>>>>>>>>>>
>>>>>>>>>> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> Which parameter I can add to JVM to use more than 1 CPU ?
>>>>>>>>>>>
>>>>>>>>>>> Toni.
>>>>>>>>>>>
>>>>>>>>>>> 2009/2/24 sebb <se...@gmail.com>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> wrote:
>>>>>
>>>>>
>>>>>> > > Hello, every body....
>>>>>>>>>>> > >
>>>>>>>>>>> > > Just one question, Is it possible to send jmeter to work
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> in
>>>
>>>
>>>> multiple
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> > CPUs as
>>>>>>>>>>> > > a single process, or I have to send a process for each
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> CPU
>>>
>>>
>>>> ?
>>>>>
>>>>>
>>>>>> >
>>>>>>>>>>> > JMeter is pure Java, and will use as many CPUs as the JVM
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> may
>>>
>>>
>>>> choose
>>>>>>>
>>>>>>>
>>>>>>>> to
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> > use.
>>>>>>>>>>> >
>>>>>>>>>>> > >
>>>>>>>>>>> > > Toni.
>>>>>>>>>>> > >
>>>>>>>>>>> >
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>> ---------------------------------------------------------------------
>>>>>>>
>>>>>>>
>>>>>>>> > To unsubscribe, e-mail:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> jmeter-user-unsubscribe@jakarta.apache.org
>>>>>>>
>>>>>>>
>>>>>>>> > For additional commands, e-mail:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> jmeter-user-help@jakarta.apache.org
>>>>>>>
>>>>>>>
>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>> ---------------------------------------------------------------------
>>>>>
>>>>>
>>>>>> To unsubscribe, e-mail:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> jmeter-user-unsubscribe@jakarta.apache.org
>>>
>>>
>>>> For additional commands, e-mail:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> jmeter-user-help@jakarta.apache.org
>>>>>
>>>>>
>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>> ---------------------------------------------------------------------
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>>>>>>> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> ---------------------------------------------------------------------
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>>>>>
>>>>>
>>>>>
>>>>>
>>>> ---------------------------------------------------------------------
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>>>
>>>
>>>
>>>
>>
>>
>>
>
>
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>
Re: Use jmeter in multiple CPUs
Posted by kirk <ki...@kodewerk.com>.
Hi Toni,
Something appears to be artificially throttling your threads. Can you
create a thread dump? kill -QUIT pid should do it. I've not seen RH
limit threads to this extent, not without seeing system times
significantly higher.
Regards,
Kirk
Toni Menendez Lopez wrote:
> 1st.- CPU usage .-
> 12:31:54 PM CPU %user %nice %system %iowait %idle
> 12:31:56 PM all 28.62 0.00 0.50 0.12 70.75
> 12:31:56 PM 0 31.16 0.00 0.50 0.00 68.34
> 12:31:56 PM 1 22.11 0.00 0.50 0.00 77.39
> 12:31:56 PM 2 30.35 0.00 1.00 0.00 68.66
> 12:31:56 PM 3 30.00 0.00 0.50 1.00 68.50
> 12:31:56 PM CPU %user %nice %system %iowait %idle
> 12:31:58 PM all 31.09 0.12 0.75 0.00 68.04
> 12:31:58 PM 0 33.33 0.00 1.00 0.00 65.67
> 12:31:58 PM 1 29.70 0.50 0.00 0.00 69.80
> 12:31:58 PM 2 24.00 0.00 1.00 0.00 75.00
> 12:31:58 PM 3 38.00 0.00 0.50 0.00 61.50
> 12:31:58 PM CPU %user %nice %system %iowait %idle
> 12:32:00 PM all 29.00 0.00 0.38 0.38 70.25
> 12:32:00 PM 0 37.50 0.00 1.00 0.00 61.50
> 12:32:00 PM 1 20.60 0.00 0.50 0.00 78.89
> 12:32:00 PM 2 26.13 0.00 0.00 1.01 72.86
> 12:32:00 PM 3 31.34 0.00 0.50 0.00 68.16
> 12:32:00 PM CPU %user %nice %system %iowait %idle
> 12:32:02 PM all 28.00 0.00 0.25 0.00 71.75
> 12:32:02 PM 0 33.33 0.00 0.50 0.00 66.17
> 12:32:02 PM 1 34.33 0.00 0.50 0.00 65.17
> 12:32:02 PM 2 40.00 0.00 0.00 0.00 60.00
> 12:32:02 PM 3 5.00 0.00 0.00 0.00 95.00
> 12:32:02 PM CPU %user %nice %system %iowait %idle
> 12:32:04 PM all 28.80 0.00 0.37 0.00 70.82
> 12:32:04 PM 0 30.50 0.00 0.50 0.00 69.00
> 12:32:04 PM 1 28.64 0.00 0.00 0.00 71.36
> 12:32:04 PM 2 22.89 0.00 1.00 0.00 76.12
> 12:32:04 PM 3 32.66 0.00 0.00 0.00 67.34
> Average: CPU %user %nice %system %iowait %idle
> Average: all 28.74 0.02 0.44 0.10 70.70
> Average: 0 33.38 0.00 0.65 0.20 65.77
> Average: 1 27.59 0.05 0.35 0.00 72.01
> Average: 2 25.72 0.05 0.45 0.10 73.68
> Average: 3 28.24 0.05 0.30 0.10 71.31
>
> 2.- About transactions....
>
> 420KB.seg = 3360Kb/s = 3Mb/s ( so it is not a problem of network ).
>
> 3.- The only way to increase the trhoughput is to download the PermSize in
> JVM, and in this case I can download the CPU usage and after increase the
> trhoughput. But, I am never able to increase more than 25% of CPU...
>
>
> 4.- I will check if it is a limitation of OS, I am using RHEL4.5
>
> 2009/2/25 Thomas Johnson <nt...@gmail.com>
>
>
>> Hmm, just ignoring jconsole for a moment, what does your OS say about
>> its CPU usage? Does top, prstat, acitivity monitor, or task manager
>> show that your Java process is also using 25% CPU? Is that 25%
>> combined, or is that just User space, not counting time in Kernel
>> space?
>>
>> Once again, I'd just like to rule out a bottleneck at the network
>> level. Can you check how much bandwidth you're using, and compare it
>> to the amount of bandwidth that's available on your network? How large
>> are the transactions? 100tx/sec multiplied by (arbitrary) 100
>> kilobytes per transaction is a full 10 MBps, which will easily
>> saturate a 100Mbps ethernet link.
>>
>> Also, does changing the thread count do anything to your Transaction
>> rate? Do you still only get 100 tx/sec if you increase the thread
>> count? What is the impact on your CPU usage when you double the thread
>> countL
>>
>> Also, do you know if your system policy is limiting your resource
>> usage to a given percentage?
>>
>> On Wed, Feb 25, 2009 at 11:46 AM, Toni Menendez Lopez
>> <to...@gmail.com> wrote:
>>
>>> I am testing a Huge platform that is able to get like 5000reqxseg, and
>>>
>> now I
>>
>>> am only sending 100reqxseg, so my Load is doing nothing to the Tested
>>> server.
>>>
>>> About logs, I am not writing any logs in my jmeter...
>>>
>>> May main question, and I am not able to find a solution, and I am
>>>
>> browsing
>>
>>> in google is why with jconsole the CPU of the JVM is not able to go
>>>
>> further
>>
>>> than 25% even when I have much free CPU.
>>>
>>> Toni.
>>>
>>> 2009/2/25 Thomas Johnson <nt...@gmail.com>
>>>
>>>
>>>> Just curious -- what kind of system are you testing?
>>>>
>>>> Are you doing tests against a website? You might be hitting bandwidth
>>>> limitations, meaning that the test machine's CPU has nothing to do
>>>> while it waits for the network. If you are running the server on the
>>>> same system, the server might be eating the other 75% of the CPU.
>>>>
>>>> Also, if you are logging data, what kind of device are you writing
>>>> logs to? Is it a local hard drive, or a networked drive?
>>>>
>>>> On Wed, Feb 25, 2009 at 11:17 AM, Toni Menendez Lopez
>>>> <to...@gmail.com> wrote:
>>>>
>>>>> OK, I have a look to the links and still thinks that I don´t
>>>>>
>> underestand
>>
>>>>> quite well, I explain to you :
>>>>>
>>>>> After lloking in the CPU´s in OS I can see that the threads are spread
>>>>>
>> in
>>
>>>>> all CPU´s look attachment ( CPU.jpg ).
>>>>>
>>>>> After this I tried to check the JVM working mode and I go to jconsole,
>>>>>
>>>> and
>>>>
>>>>> now in this case I am not able to get more than 25% of CPU, look the
>>>>> graph... (jconsole.jpg)
>>>>>
>>>>> Do you have any idea why the JVM of the jmeter is not able to go
>>>>>
>> further
>>
>>>>> than 25% ?
>>>>>
>>>>>
>>>>> Toni.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> 2009/2/25 <da...@davidwbrown.name>
>>>>>
>>>>> Hello Toni, I think Sebb et. al. was trying to get you to understand
>>>>>
>> the
>>
>>>>>> complexities of the JVM (see link). Even ANSI C daemons that clone
>>>>>> themselves and spawn off all new OS processes don't really get
>>>>>>
>> involved
>>
>>>> with
>>>>
>>>>>> hardware CPUs as a plural concern.
>>>>>>
>>>>>> http://www.mindprod.com/jgloss/jvm.html
>>>>>>
>>>>>>
>>>>>> Secondly, if you are concerned with JMeter and performance testing
>>>>>>
>> and
>>
>>>> the
>>>>
>>>>>> performance of JMeter itself during serious application testing take
>>>>>>
>> a
>>
>>>> look
>>>>
>>>>>> at this link:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>> http://jakarta.apache.org/jmeter/usermanual/jmeter_distributed_testing_step_by_step.pdf
>>
>>>>>> Toni Menendez Lopez wrote ..
>>>>>> > But normal behaviour of Jmeter if I don´t change anything , does
>>>>>>
>> not
>>
>>>>>> permit
>>>>>>
>>>>>>> multi-cpu, isn´t it ?
>>>>>>>
>>>>>>> Toni.
>>>>>>>
>>>>>>> 2009/2/24 Toni Menendez Lopez <to...@gmail.com>
>>>>>>>
>>>>>>>
>>>>>>>> Just any clue where to find ?
>>>>>>>>
>>>>>>>> Toni.
>>>>>>>>
>>>>>>>> 2009/2/24 sebb <se...@gmail.com>
>>>>>>>>
>>>>>>>>
>>>>>>>>> Check the JVM documentation?
>>>>>>>>>
>>>>>>>>> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>> Which parameter I can add to JVM to use more than 1 CPU ?
>>>>>>>>>>
>>>>>>>>>> Toni.
>>>>>>>>>>
>>>>>>>>>> 2009/2/24 sebb <se...@gmail.com>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com>
>>>>>>>>>>
>>>> wrote:
>>>>
>>>>>>>>>> > > Hello, every body....
>>>>>>>>>> > >
>>>>>>>>>> > > Just one question, Is it possible to send jmeter to work
>>>>>>>>>>
>> in
>>
>>>>>>>>> multiple
>>>>>>>>>
>>>>>>>>>> > CPUs as
>>>>>>>>>> > > a single process, or I have to send a process for each
>>>>>>>>>>
>> CPU
>>
>>>> ?
>>>>
>>>>>>>>>> >
>>>>>>>>>> > JMeter is pure Java, and will use as many CPUs as the JVM
>>>>>>>>>>
>> may
>>
>>>>>> choose
>>>>>>
>>>>>>>>> to
>>>>>>>>>
>>>>>>>>>> > use.
>>>>>>>>>> >
>>>>>>>>>> > >
>>>>>>>>>> > > Toni.
>>>>>>>>>> > >
>>>>>>>>>> >
>>>>>>>>>>
>>>>>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>>
>>>>>>>>>> > To unsubscribe, e-mail:
>>>>>>>>>>
>>>>>> jmeter-user-unsubscribe@jakarta.apache.org
>>>>>>
>>>>>>>>>> > For additional commands, e-mail:
>>>>>>>>>>
>>>>>> jmeter-user-help@jakarta.apache.org
>>>>>>
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>> ---------------------------------------------------------------------
>>>>
>>>>>>>>> To unsubscribe, e-mail:
>>>>>>>>>
>> jmeter-user-unsubscribe@jakarta.apache.org
>>
>>>>>>>>> For additional commands, e-mail:
>>>>>>>>>
>>>> jmeter-user-help@jakarta.apache.org
>>>>
>>>>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
>>>>>> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>>>>>>
>>>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
>>>> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>>>>
>>>>
>>>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>>
>>
>>
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
Re: Use jmeter in multiple CPUs
Posted by Toni Menendez Lopez <to...@gmail.com>.
1st.- CPU usage .-
12:31:54 PM CPU %user %nice %system %iowait %idle
12:31:56 PM all 28.62 0.00 0.50 0.12 70.75
12:31:56 PM 0 31.16 0.00 0.50 0.00 68.34
12:31:56 PM 1 22.11 0.00 0.50 0.00 77.39
12:31:56 PM 2 30.35 0.00 1.00 0.00 68.66
12:31:56 PM 3 30.00 0.00 0.50 1.00 68.50
12:31:56 PM CPU %user %nice %system %iowait %idle
12:31:58 PM all 31.09 0.12 0.75 0.00 68.04
12:31:58 PM 0 33.33 0.00 1.00 0.00 65.67
12:31:58 PM 1 29.70 0.50 0.00 0.00 69.80
12:31:58 PM 2 24.00 0.00 1.00 0.00 75.00
12:31:58 PM 3 38.00 0.00 0.50 0.00 61.50
12:31:58 PM CPU %user %nice %system %iowait %idle
12:32:00 PM all 29.00 0.00 0.38 0.38 70.25
12:32:00 PM 0 37.50 0.00 1.00 0.00 61.50
12:32:00 PM 1 20.60 0.00 0.50 0.00 78.89
12:32:00 PM 2 26.13 0.00 0.00 1.01 72.86
12:32:00 PM 3 31.34 0.00 0.50 0.00 68.16
12:32:00 PM CPU %user %nice %system %iowait %idle
12:32:02 PM all 28.00 0.00 0.25 0.00 71.75
12:32:02 PM 0 33.33 0.00 0.50 0.00 66.17
12:32:02 PM 1 34.33 0.00 0.50 0.00 65.17
12:32:02 PM 2 40.00 0.00 0.00 0.00 60.00
12:32:02 PM 3 5.00 0.00 0.00 0.00 95.00
12:32:02 PM CPU %user %nice %system %iowait %idle
12:32:04 PM all 28.80 0.00 0.37 0.00 70.82
12:32:04 PM 0 30.50 0.00 0.50 0.00 69.00
12:32:04 PM 1 28.64 0.00 0.00 0.00 71.36
12:32:04 PM 2 22.89 0.00 1.00 0.00 76.12
12:32:04 PM 3 32.66 0.00 0.00 0.00 67.34
Average: CPU %user %nice %system %iowait %idle
Average: all 28.74 0.02 0.44 0.10 70.70
Average: 0 33.38 0.00 0.65 0.20 65.77
Average: 1 27.59 0.05 0.35 0.00 72.01
Average: 2 25.72 0.05 0.45 0.10 73.68
Average: 3 28.24 0.05 0.30 0.10 71.31
2.- About transactions....
420KB.seg = 3360Kb/s = 3Mb/s ( so it is not a problem of network ).
3.- The only way to increase the trhoughput is to download the PermSize in
JVM, and in this case I can download the CPU usage and after increase the
trhoughput. But, I am never able to increase more than 25% of CPU...
4.- I will check if it is a limitation of OS, I am using RHEL4.5
2009/2/25 Thomas Johnson <nt...@gmail.com>
> Hmm, just ignoring jconsole for a moment, what does your OS say about
> its CPU usage? Does top, prstat, acitivity monitor, or task manager
> show that your Java process is also using 25% CPU? Is that 25%
> combined, or is that just User space, not counting time in Kernel
> space?
>
> Once again, I'd just like to rule out a bottleneck at the network
> level. Can you check how much bandwidth you're using, and compare it
> to the amount of bandwidth that's available on your network? How large
> are the transactions? 100tx/sec multiplied by (arbitrary) 100
> kilobytes per transaction is a full 10 MBps, which will easily
> saturate a 100Mbps ethernet link.
>
> Also, does changing the thread count do anything to your Transaction
> rate? Do you still only get 100 tx/sec if you increase the thread
> count? What is the impact on your CPU usage when you double the thread
> countL
>
> Also, do you know if your system policy is limiting your resource
> usage to a given percentage?
>
> On Wed, Feb 25, 2009 at 11:46 AM, Toni Menendez Lopez
> <to...@gmail.com> wrote:
> > I am testing a Huge platform that is able to get like 5000reqxseg, and
> now I
> > am only sending 100reqxseg, so my Load is doing nothing to the Tested
> > server.
> >
> > About logs, I am not writing any logs in my jmeter...
> >
> > May main question, and I am not able to find a solution, and I am
> browsing
> > in google is why with jconsole the CPU of the JVM is not able to go
> further
> > than 25% even when I have much free CPU.
> >
> > Toni.
> >
> > 2009/2/25 Thomas Johnson <nt...@gmail.com>
> >
> >> Just curious -- what kind of system are you testing?
> >>
> >> Are you doing tests against a website? You might be hitting bandwidth
> >> limitations, meaning that the test machine's CPU has nothing to do
> >> while it waits for the network. If you are running the server on the
> >> same system, the server might be eating the other 75% of the CPU.
> >>
> >> Also, if you are logging data, what kind of device are you writing
> >> logs to? Is it a local hard drive, or a networked drive?
> >>
> >> On Wed, Feb 25, 2009 at 11:17 AM, Toni Menendez Lopez
> >> <to...@gmail.com> wrote:
> >> > OK, I have a look to the links and still thinks that I don´t
> underestand
> >> > quite well, I explain to you :
> >> >
> >> > After lloking in the CPU´s in OS I can see that the threads are spread
> in
> >> > all CPU´s look attachment ( CPU.jpg ).
> >> >
> >> > After this I tried to check the JVM working mode and I go to jconsole,
> >> and
> >> > now in this case I am not able to get more than 25% of CPU, look the
> >> > graph... (jconsole.jpg)
> >> >
> >> > Do you have any idea why the JVM of the jmeter is not able to go
> further
> >> > than 25% ?
> >> >
> >> >
> >> > Toni.
> >> >
> >> >
> >> >
> >> >
> >> > 2009/2/25 <da...@davidwbrown.name>
> >> >
> >> > Hello Toni, I think Sebb et. al. was trying to get you to understand
> the
> >> >> complexities of the JVM (see link). Even ANSI C daemons that clone
> >> >> themselves and spawn off all new OS processes don't really get
> involved
> >> with
> >> >> hardware CPUs as a plural concern.
> >> >>
> >> >> http://www.mindprod.com/jgloss/jvm.html
> >> >>
> >> >>
> >> >> Secondly, if you are concerned with JMeter and performance testing
> and
> >> the
> >> >> performance of JMeter itself during serious application testing take
> a
> >> look
> >> >> at this link:
> >> >>
> >> >>
> >> >>
> >>
> http://jakarta.apache.org/jmeter/usermanual/jmeter_distributed_testing_step_by_step.pdf
> >> >>
> >> >> Toni Menendez Lopez wrote ..
> >> >> > But normal behaviour of Jmeter if I don´t change anything , does
> not
> >> >> permit
> >> >> > multi-cpu, isn´t it ?
> >> >> >
> >> >> > Toni.
> >> >> >
> >> >> > 2009/2/24 Toni Menendez Lopez <to...@gmail.com>
> >> >> >
> >> >> > > Just any clue where to find ?
> >> >> > >
> >> >> > > Toni.
> >> >> > >
> >> >> > > 2009/2/24 sebb <se...@gmail.com>
> >> >> > >
> >> >> > >> Check the JVM documentation?
> >> >> > >>
> >> >> > >> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> >> >> > >> > Which parameter I can add to JVM to use more than 1 CPU ?
> >> >> > >> >
> >> >> > >> > Toni.
> >> >> > >> >
> >> >> > >> > 2009/2/24 sebb <se...@gmail.com>
> >> >> > >> >
> >> >> > >> >
> >> >> > >> > > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com>
> >> wrote:
> >> >> > >> > > > Hello, every body....
> >> >> > >> > > >
> >> >> > >> > > > Just one question, Is it possible to send jmeter to work
> in
> >> >> > >> multiple
> >> >> > >> > > CPUs as
> >> >> > >> > > > a single process, or I have to send a process for each
> CPU
> >> ?
> >> >> > >> > >
> >> >> > >> > > JMeter is pure Java, and will use as many CPUs as the JVM
> may
> >> >> choose
> >> >> > >> to
> >> >> > >> > > use.
> >> >> > >> > >
> >> >> > >> > > >
> >> >> > >> > > > Toni.
> >> >> > >> > > >
> >> >> > >> > >
> >> >> > >> >
> >> >> > >> > >
> >> >> ---------------------------------------------------------------------
> >> >> > >> > > To unsubscribe, e-mail:
> >> >> jmeter-user-unsubscribe@jakarta.apache.org
> >> >> > >> > > For additional commands, e-mail:
> >> >> jmeter-user-help@jakarta.apache.org
> >> >> > >> > >
> >> >> > >> > >
> >> >> > >> >
> >> >> > >>
> >> >> > >>
> >> ---------------------------------------------------------------------
> >> >> > >> To unsubscribe, e-mail:
> jmeter-user-unsubscribe@jakarta.apache.org
> >> >> > >> For additional commands, e-mail:
> >> jmeter-user-help@jakarta.apache.org
> >> >> > >>
> >> >> > >>
> >> >> > >
> >> >>
> >> >>
> >> >> ---------------------------------------------------------------------
> >> >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> >> >> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> >> >>
> >> >
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> >> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> >>
> >>
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>
>
Re: Use jmeter in multiple CPUs
Posted by Thomas Johnson <nt...@gmail.com>.
Hmm, just ignoring jconsole for a moment, what does your OS say about
its CPU usage? Does top, prstat, acitivity monitor, or task manager
show that your Java process is also using 25% CPU? Is that 25%
combined, or is that just User space, not counting time in Kernel
space?
Once again, I'd just like to rule out a bottleneck at the network
level. Can you check how much bandwidth you're using, and compare it
to the amount of bandwidth that's available on your network? How large
are the transactions? 100tx/sec multiplied by (arbitrary) 100
kilobytes per transaction is a full 10 MBps, which will easily
saturate a 100Mbps ethernet link.
Also, does changing the thread count do anything to your Transaction
rate? Do you still only get 100 tx/sec if you increase the thread
count? What is the impact on your CPU usage when you double the thread
countL
Also, do you know if your system policy is limiting your resource
usage to a given percentage?
On Wed, Feb 25, 2009 at 11:46 AM, Toni Menendez Lopez
<to...@gmail.com> wrote:
> I am testing a Huge platform that is able to get like 5000reqxseg, and now I
> am only sending 100reqxseg, so my Load is doing nothing to the Tested
> server.
>
> About logs, I am not writing any logs in my jmeter...
>
> May main question, and I am not able to find a solution, and I am browsing
> in google is why with jconsole the CPU of the JVM is not able to go further
> than 25% even when I have much free CPU.
>
> Toni.
>
> 2009/2/25 Thomas Johnson <nt...@gmail.com>
>
>> Just curious -- what kind of system are you testing?
>>
>> Are you doing tests against a website? You might be hitting bandwidth
>> limitations, meaning that the test machine's CPU has nothing to do
>> while it waits for the network. If you are running the server on the
>> same system, the server might be eating the other 75% of the CPU.
>>
>> Also, if you are logging data, what kind of device are you writing
>> logs to? Is it a local hard drive, or a networked drive?
>>
>> On Wed, Feb 25, 2009 at 11:17 AM, Toni Menendez Lopez
>> <to...@gmail.com> wrote:
>> > OK, I have a look to the links and still thinks that I don´t underestand
>> > quite well, I explain to you :
>> >
>> > After lloking in the CPU´s in OS I can see that the threads are spread in
>> > all CPU´s look attachment ( CPU.jpg ).
>> >
>> > After this I tried to check the JVM working mode and I go to jconsole,
>> and
>> > now in this case I am not able to get more than 25% of CPU, look the
>> > graph... (jconsole.jpg)
>> >
>> > Do you have any idea why the JVM of the jmeter is not able to go further
>> > than 25% ?
>> >
>> >
>> > Toni.
>> >
>> >
>> >
>> >
>> > 2009/2/25 <da...@davidwbrown.name>
>> >
>> > Hello Toni, I think Sebb et. al. was trying to get you to understand the
>> >> complexities of the JVM (see link). Even ANSI C daemons that clone
>> >> themselves and spawn off all new OS processes don't really get involved
>> with
>> >> hardware CPUs as a plural concern.
>> >>
>> >> http://www.mindprod.com/jgloss/jvm.html
>> >>
>> >>
>> >> Secondly, if you are concerned with JMeter and performance testing and
>> the
>> >> performance of JMeter itself during serious application testing take a
>> look
>> >> at this link:
>> >>
>> >>
>> >>
>> http://jakarta.apache.org/jmeter/usermanual/jmeter_distributed_testing_step_by_step.pdf
>> >>
>> >> Toni Menendez Lopez wrote ..
>> >> > But normal behaviour of Jmeter if I don´t change anything , does not
>> >> permit
>> >> > multi-cpu, isn´t it ?
>> >> >
>> >> > Toni.
>> >> >
>> >> > 2009/2/24 Toni Menendez Lopez <to...@gmail.com>
>> >> >
>> >> > > Just any clue where to find ?
>> >> > >
>> >> > > Toni.
>> >> > >
>> >> > > 2009/2/24 sebb <se...@gmail.com>
>> >> > >
>> >> > >> Check the JVM documentation?
>> >> > >>
>> >> > >> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
>> >> > >> > Which parameter I can add to JVM to use more than 1 CPU ?
>> >> > >> >
>> >> > >> > Toni.
>> >> > >> >
>> >> > >> > 2009/2/24 sebb <se...@gmail.com>
>> >> > >> >
>> >> > >> >
>> >> > >> > > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com>
>> wrote:
>> >> > >> > > > Hello, every body....
>> >> > >> > > >
>> >> > >> > > > Just one question, Is it possible to send jmeter to work in
>> >> > >> multiple
>> >> > >> > > CPUs as
>> >> > >> > > > a single process, or I have to send a process for each CPU
>> ?
>> >> > >> > >
>> >> > >> > > JMeter is pure Java, and will use as many CPUs as the JVM may
>> >> choose
>> >> > >> to
>> >> > >> > > use.
>> >> > >> > >
>> >> > >> > > >
>> >> > >> > > > Toni.
>> >> > >> > > >
>> >> > >> > >
>> >> > >> >
>> >> > >> > >
>> >> ---------------------------------------------------------------------
>> >> > >> > > To unsubscribe, e-mail:
>> >> jmeter-user-unsubscribe@jakarta.apache.org
>> >> > >> > > For additional commands, e-mail:
>> >> jmeter-user-help@jakarta.apache.org
>> >> > >> > >
>> >> > >> > >
>> >> > >> >
>> >> > >>
>> >> > >>
>> ---------------------------------------------------------------------
>> >> > >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
>> >> > >> For additional commands, e-mail:
>> jmeter-user-help@jakarta.apache.org
>> >> > >>
>> >> > >>
>> >> > >
>> >>
>> >>
>> >> ---------------------------------------------------------------------
>> >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
>> >> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>> >>
>> >
>>
>> ---------------------------------------------------------------------
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Re: Use jmeter in multiple CPUs
Posted by Toni Menendez Lopez <to...@gmail.com>.
I am testing a Huge platform that is able to get like 5000reqxseg, and now I
am only sending 100reqxseg, so my Load is doing nothing to the Tested
server.
About logs, I am not writing any logs in my jmeter...
May main question, and I am not able to find a solution, and I am browsing
in google is why with jconsole the CPU of the JVM is not able to go further
than 25% even when I have much free CPU.
Toni.
2009/2/25 Thomas Johnson <nt...@gmail.com>
> Just curious -- what kind of system are you testing?
>
> Are you doing tests against a website? You might be hitting bandwidth
> limitations, meaning that the test machine's CPU has nothing to do
> while it waits for the network. If you are running the server on the
> same system, the server might be eating the other 75% of the CPU.
>
> Also, if you are logging data, what kind of device are you writing
> logs to? Is it a local hard drive, or a networked drive?
>
> On Wed, Feb 25, 2009 at 11:17 AM, Toni Menendez Lopez
> <to...@gmail.com> wrote:
> > OK, I have a look to the links and still thinks that I don´t underestand
> > quite well, I explain to you :
> >
> > After lloking in the CPU´s in OS I can see that the threads are spread in
> > all CPU´s look attachment ( CPU.jpg ).
> >
> > After this I tried to check the JVM working mode and I go to jconsole,
> and
> > now in this case I am not able to get more than 25% of CPU, look the
> > graph... (jconsole.jpg)
> >
> > Do you have any idea why the JVM of the jmeter is not able to go further
> > than 25% ?
> >
> >
> > Toni.
> >
> >
> >
> >
> > 2009/2/25 <da...@davidwbrown.name>
> >
> > Hello Toni, I think Sebb et. al. was trying to get you to understand the
> >> complexities of the JVM (see link). Even ANSI C daemons that clone
> >> themselves and spawn off all new OS processes don't really get involved
> with
> >> hardware CPUs as a plural concern.
> >>
> >> http://www.mindprod.com/jgloss/jvm.html
> >>
> >>
> >> Secondly, if you are concerned with JMeter and performance testing and
> the
> >> performance of JMeter itself during serious application testing take a
> look
> >> at this link:
> >>
> >>
> >>
> http://jakarta.apache.org/jmeter/usermanual/jmeter_distributed_testing_step_by_step.pdf
> >>
> >> Toni Menendez Lopez wrote ..
> >> > But normal behaviour of Jmeter if I don´t change anything , does not
> >> permit
> >> > multi-cpu, isn´t it ?
> >> >
> >> > Toni.
> >> >
> >> > 2009/2/24 Toni Menendez Lopez <to...@gmail.com>
> >> >
> >> > > Just any clue where to find ?
> >> > >
> >> > > Toni.
> >> > >
> >> > > 2009/2/24 sebb <se...@gmail.com>
> >> > >
> >> > >> Check the JVM documentation?
> >> > >>
> >> > >> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> >> > >> > Which parameter I can add to JVM to use more than 1 CPU ?
> >> > >> >
> >> > >> > Toni.
> >> > >> >
> >> > >> > 2009/2/24 sebb <se...@gmail.com>
> >> > >> >
> >> > >> >
> >> > >> > > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com>
> wrote:
> >> > >> > > > Hello, every body....
> >> > >> > > >
> >> > >> > > > Just one question, Is it possible to send jmeter to work in
> >> > >> multiple
> >> > >> > > CPUs as
> >> > >> > > > a single process, or I have to send a process for each CPU
> ?
> >> > >> > >
> >> > >> > > JMeter is pure Java, and will use as many CPUs as the JVM may
> >> choose
> >> > >> to
> >> > >> > > use.
> >> > >> > >
> >> > >> > > >
> >> > >> > > > Toni.
> >> > >> > > >
> >> > >> > >
> >> > >> >
> >> > >> > >
> >> ---------------------------------------------------------------------
> >> > >> > > To unsubscribe, e-mail:
> >> jmeter-user-unsubscribe@jakarta.apache.org
> >> > >> > > For additional commands, e-mail:
> >> jmeter-user-help@jakarta.apache.org
> >> > >> > >
> >> > >> > >
> >> > >> >
> >> > >>
> >> > >>
> ---------------------------------------------------------------------
> >> > >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> >> > >> For additional commands, e-mail:
> jmeter-user-help@jakarta.apache.org
> >> > >>
> >> > >>
> >> > >
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> >> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> >>
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>
>
Re: Use jmeter in multiple CPUs
Posted by Thomas Johnson <nt...@gmail.com>.
Just curious -- what kind of system are you testing?
Are you doing tests against a website? You might be hitting bandwidth
limitations, meaning that the test machine's CPU has nothing to do
while it waits for the network. If you are running the server on the
same system, the server might be eating the other 75% of the CPU.
Also, if you are logging data, what kind of device are you writing
logs to? Is it a local hard drive, or a networked drive?
On Wed, Feb 25, 2009 at 11:17 AM, Toni Menendez Lopez
<to...@gmail.com> wrote:
> OK, I have a look to the links and still thinks that I don´t underestand
> quite well, I explain to you :
>
> After lloking in the CPU´s in OS I can see that the threads are spread in
> all CPU´s look attachment ( CPU.jpg ).
>
> After this I tried to check the JVM working mode and I go to jconsole, and
> now in this case I am not able to get more than 25% of CPU, look the
> graph... (jconsole.jpg)
>
> Do you have any idea why the JVM of the jmeter is not able to go further
> than 25% ?
>
>
> Toni.
>
>
>
>
> 2009/2/25 <da...@davidwbrown.name>
>
> Hello Toni, I think Sebb et. al. was trying to get you to understand the
>> complexities of the JVM (see link). Even ANSI C daemons that clone
>> themselves and spawn off all new OS processes don't really get involved with
>> hardware CPUs as a plural concern.
>>
>> http://www.mindprod.com/jgloss/jvm.html
>>
>>
>> Secondly, if you are concerned with JMeter and performance testing and the
>> performance of JMeter itself during serious application testing take a look
>> at this link:
>>
>>
>> http://jakarta.apache.org/jmeter/usermanual/jmeter_distributed_testing_step_by_step.pdf
>>
>> Toni Menendez Lopez wrote ..
>> > But normal behaviour of Jmeter if I don´t change anything , does not
>> permit
>> > multi-cpu, isn´t it ?
>> >
>> > Toni.
>> >
>> > 2009/2/24 Toni Menendez Lopez <to...@gmail.com>
>> >
>> > > Just any clue where to find ?
>> > >
>> > > Toni.
>> > >
>> > > 2009/2/24 sebb <se...@gmail.com>
>> > >
>> > >> Check the JVM documentation?
>> > >>
>> > >> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
>> > >> > Which parameter I can add to JVM to use more than 1 CPU ?
>> > >> >
>> > >> > Toni.
>> > >> >
>> > >> > 2009/2/24 sebb <se...@gmail.com>
>> > >> >
>> > >> >
>> > >> > > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
>> > >> > > > Hello, every body....
>> > >> > > >
>> > >> > > > Just one question, Is it possible to send jmeter to work in
>> > >> multiple
>> > >> > > CPUs as
>> > >> > > > a single process, or I have to send a process for each CPU ?
>> > >> > >
>> > >> > > JMeter is pure Java, and will use as many CPUs as the JVM may
>> choose
>> > >> to
>> > >> > > use.
>> > >> > >
>> > >> > > >
>> > >> > > > Toni.
>> > >> > > >
>> > >> > >
>> > >> >
>> > >> > >
>> ---------------------------------------------------------------------
>> > >> > > To unsubscribe, e-mail:
>> jmeter-user-unsubscribe@jakarta.apache.org
>> > >> > > For additional commands, e-mail:
>> jmeter-user-help@jakarta.apache.org
>> > >> > >
>> > >> > >
>> > >> >
>> > >>
>> > >> ---------------------------------------------------------------------
>> > >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
>> > >> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>> > >>
>> > >>
>> > >
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>>
>
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Fwd: Use jmeter in multiple CPUs
Posted by Toni Menendez Lopez <to...@gmail.com>.
OK, I have a look to the links and still thinks that I don´t underestand
quite well, I explain to you :
After lloking in the CPU´s in OS I can see that the threads are spread in
all CPU´s look attachment ( CPU.jpg ).
After this I tried to check the JVM working mode and I go to jconsole, and
now in this case I am not able to get more than 25% of CPU, look the
graph... (jconsole.jpg)
Do you have any idea why the JVM of the jmeter is not able to go further
than 25% ?
Toni.
2009/2/25 <da...@davidwbrown.name>
Hello Toni, I think Sebb et. al. was trying to get you to understand the
> complexities of the JVM (see link). Even ANSI C daemons that clone
> themselves and spawn off all new OS processes don't really get involved with
> hardware CPUs as a plural concern.
>
> http://www.mindprod.com/jgloss/jvm.html
>
>
> Secondly, if you are concerned with JMeter and performance testing and the
> performance of JMeter itself during serious application testing take a look
> at this link:
>
>
> http://jakarta.apache.org/jmeter/usermanual/jmeter_distributed_testing_step_by_step.pdf
>
> Toni Menendez Lopez wrote ..
> > But normal behaviour of Jmeter if I don´t change anything , does not
> permit
> > multi-cpu, isn´t it ?
> >
> > Toni.
> >
> > 2009/2/24 Toni Menendez Lopez <to...@gmail.com>
> >
> > > Just any clue where to find ?
> > >
> > > Toni.
> > >
> > > 2009/2/24 sebb <se...@gmail.com>
> > >
> > >> Check the JVM documentation?
> > >>
> > >> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> > >> > Which parameter I can add to JVM to use more than 1 CPU ?
> > >> >
> > >> > Toni.
> > >> >
> > >> > 2009/2/24 sebb <se...@gmail.com>
> > >> >
> > >> >
> > >> > > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> > >> > > > Hello, every body....
> > >> > > >
> > >> > > > Just one question, Is it possible to send jmeter to work in
> > >> multiple
> > >> > > CPUs as
> > >> > > > a single process, or I have to send a process for each CPU ?
> > >> > >
> > >> > > JMeter is pure Java, and will use as many CPUs as the JVM may
> choose
> > >> to
> > >> > > use.
> > >> > >
> > >> > > >
> > >> > > > Toni.
> > >> > > >
> > >> > >
> > >> >
> > >> > >
> ---------------------------------------------------------------------
> > >> > > To unsubscribe, e-mail:
> jmeter-user-unsubscribe@jakarta.apache.org
> > >> > > For additional commands, e-mail:
> jmeter-user-help@jakarta.apache.org
> > >> > >
> > >> > >
> > >> >
> > >>
> > >> ---------------------------------------------------------------------
> > >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> > >> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> > >>
> > >>
> > >
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>
Re: Use jmeter in multiple CPUs
Posted by sebb <se...@gmail.com>.
As I wrote before, JMeter is a pure Java application, and it is the
JVM which decides whether to use multiple CPUs or not.
Check the documentation that applies to your JVM, which should be
available from the same place where you got the JVM.
On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> But normal behaviour of Jmeter if I don´t change anything , does not permit
> multi-cpu, isn´t it ?
>
> Toni.
>
> 2009/2/24 Toni Menendez Lopez <to...@gmail.com>
>
>
> > Just any clue where to find ?
> >
> > Toni.
> >
> > 2009/2/24 sebb <se...@gmail.com>
> >
> >> Check the JVM documentation?
> >>
> >> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> >> > Which parameter I can add to JVM to use more than 1 CPU ?
> >> >
> >> > Toni.
> >> >
> >> > 2009/2/24 sebb <se...@gmail.com>
> >> >
> >> >
> >> > > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> >> > > > Hello, every body....
> >> > > >
> >> > > > Just one question, Is it possible to send jmeter to work in
> >> multiple
> >> > > CPUs as
> >> > > > a single process, or I have to send a process for each CPU ?
> >> > >
> >> > > JMeter is pure Java, and will use as many CPUs as the JVM may choose
> >> to
> >> > > use.
> >> > >
> >> > > >
> >> > > > Toni.
> >> > > >
> >> > >
> >> >
> >> > > ---------------------------------------------------------------------
> >> > > To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> >> > > For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> >> > >
> >> > >
> >> >
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> >> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> >>
> >>
> >
>
---------------------------------------------------------------------
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Re: Use jmeter in multiple CPUs
Posted by da...@davidwbrown.name.
Hello Toni, I think Sebb et. al. was trying to get you to understand the complexities of the JVM (see link). Even ANSI C daemons that clone themselves and spawn off all new OS processes don't really get involved with hardware CPUs as a plural concern.
http://www.mindprod.com/jgloss/jvm.html
Secondly, if you are concerned with JMeter and performance testing and the performance of JMeter itself during serious application testing take a look at this link:
http://jakarta.apache.org/jmeter/usermanual/jmeter_distributed_testing_step_by_step.pdf
Toni Menendez Lopez wrote ..
> But normal behaviour of Jmeter if I don´t change anything , does not permit
> multi-cpu, isn´t it ?
>
> Toni.
>
> 2009/2/24 Toni Menendez Lopez <to...@gmail.com>
>
> > Just any clue where to find ?
> >
> > Toni.
> >
> > 2009/2/24 sebb <se...@gmail.com>
> >
> >> Check the JVM documentation?
> >>
> >> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> >> > Which parameter I can add to JVM to use more than 1 CPU ?
> >> >
> >> > Toni.
> >> >
> >> > 2009/2/24 sebb <se...@gmail.com>
> >> >
> >> >
> >> > > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> >> > > > Hello, every body....
> >> > > >
> >> > > > Just one question, Is it possible to send jmeter to work in
> >> multiple
> >> > > CPUs as
> >> > > > a single process, or I have to send a process for each CPU ?
> >> > >
> >> > > JMeter is pure Java, and will use as many CPUs as the JVM may choose
> >> to
> >> > > use.
> >> > >
> >> > > >
> >> > > > Toni.
> >> > > >
> >> > >
> >> >
> >> > > ---------------------------------------------------------------------
> >> > > To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> >> > > For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> >> > >
> >> > >
> >> >
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> >> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> >>
> >>
> >
Re: Use jmeter in multiple CPUs
Posted by Toni Menendez Lopez <to...@gmail.com>.
But normal behaviour of Jmeter if I don´t change anything , does not permit
multi-cpu, isn´t it ?
Toni.
2009/2/24 Toni Menendez Lopez <to...@gmail.com>
> Just any clue where to find ?
>
> Toni.
>
> 2009/2/24 sebb <se...@gmail.com>
>
>> Check the JVM documentation?
>>
>> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
>> > Which parameter I can add to JVM to use more than 1 CPU ?
>> >
>> > Toni.
>> >
>> > 2009/2/24 sebb <se...@gmail.com>
>> >
>> >
>> > > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
>> > > > Hello, every body....
>> > > >
>> > > > Just one question, Is it possible to send jmeter to work in
>> multiple
>> > > CPUs as
>> > > > a single process, or I have to send a process for each CPU ?
>> > >
>> > > JMeter is pure Java, and will use as many CPUs as the JVM may choose
>> to
>> > > use.
>> > >
>> > > >
>> > > > Toni.
>> > > >
>> > >
>> >
>> > > ---------------------------------------------------------------------
>> > > To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
>> > > For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>> > >
>> > >
>> >
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>>
>>
>
Re: Use jmeter in multiple CPUs
Posted by Toni Menendez Lopez <to...@gmail.com>.
Just any clue where to find ?
Toni.
2009/2/24 sebb <se...@gmail.com>
> Check the JVM documentation?
>
> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> > Which parameter I can add to JVM to use more than 1 CPU ?
> >
> > Toni.
> >
> > 2009/2/24 sebb <se...@gmail.com>
> >
> >
> > > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> > > > Hello, every body....
> > > >
> > > > Just one question, Is it possible to send jmeter to work in
> multiple
> > > CPUs as
> > > > a single process, or I have to send a process for each CPU ?
> > >
> > > JMeter is pure Java, and will use as many CPUs as the JVM may choose
> to
> > > use.
> > >
> > > >
> > > > Toni.
> > > >
> > >
> >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> > > For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> > >
> > >
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>
>
Re: Use jmeter in multiple CPUs
Posted by sebb <se...@gmail.com>.
Check the JVM documentation?
On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> Which parameter I can add to JVM to use more than 1 CPU ?
>
> Toni.
>
> 2009/2/24 sebb <se...@gmail.com>
>
>
> > On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> > > Hello, every body....
> > >
> > > Just one question, Is it possible to send jmeter to work in multiple
> > CPUs as
> > > a single process, or I have to send a process for each CPU ?
> >
> > JMeter is pure Java, and will use as many CPUs as the JVM may choose to
> > use.
> >
> > >
> > > Toni.
> > >
> >
>
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
> >
> >
>
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Re: Use jmeter in multiple CPUs
Posted by Toni Menendez Lopez <to...@gmail.com>.
Which parameter I can add to JVM to use more than 1 CPU ?
Toni.
2009/2/24 sebb <se...@gmail.com>
> On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> > Hello, every body....
> >
> > Just one question, Is it possible to send jmeter to work in multiple
> CPUs as
> > a single process, or I have to send a process for each CPU ?
>
> JMeter is pure Java, and will use as many CPUs as the JVM may choose to
> use.
>
> >
> > Toni.
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: jmeter-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: jmeter-user-help@jakarta.apache.org
>
>
Re: Use jmeter in multiple CPUs
Posted by sebb <se...@gmail.com>.
On 24/02/2009, Toni Menendez Lopez <to...@gmail.com> wrote:
> Hello, every body....
>
> Just one question, Is it possible to send jmeter to work in multiple CPUs as
> a single process, or I have to send a process for each CPU ?
JMeter is pure Java, and will use as many CPUs as the JVM may choose to use.
>
> Toni.
>
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