[jdk-tool][gc] Is there Heap monitoring and profiling tools in Harmony

[Simon Chow <si...@gmail.com>]

I found jprofiler can not work with Harmony now.
Is there anything like jmap or HPROF? monitoring heap structure such as LOS,
MOS, NOS etc.
I think it is not only important to tunning application but also to
facilitate the process of GC debugging for developer, isn't it?

Thanks
-- 
>From : Simon.Chow@Software School of Fudan University

Re: [jdk-tool][gc] Is there Heap monitoring and profiling tools in Harmony

[Aleksey Shipilev <al...@gmail.com>]

Right. I had a pleasant experience with TPTP not so long ago and it
worked with Harmony. Even though I've managed to run Harmony+TPTP only
in interpreter mode, the information I've gathered was really
valuable.

And so:
 1. (Xiao Feng's idea) -Xverbose:gc may give you an idea what's going
on with Java heap in general
 2. TPTP/HeapProfiler may give you pretty good insight down to exact
allocation sites, liveness info, rate of allocations and stuff
 3. Jitrino Internal profiler [1] may give you hints about allocations
too, and AFAIK you may run it even with aggressive optimizations

Thanks,
Aleksey.

[1] http://harmony.apache.org/subcomponents/drlvm/internal_profiler.html

On Thu, Mar 20, 2008 at 12:40 PM, Eugene Ostrovsky
<eu...@gmail.com> wrote:
> I expect Harmony to work with eclipse TPTP (http://www.eclipse.org/tptp/)
>  as it successfully passes TPTP tests on a regular basis.
>
>
>
>  On Thu, Mar 20, 2008 at 11:55 AM, Alexey Petrenko
>  <al...@gmail.com> wrote:
>  > As far as I know JVMTI is implemented in Harmony VM. So JVMTI based
>  >  profilers should work with Harmony, theoretically :)
>  >  However, it is possible that there are some bugs or missed
>  >  functionalities in JVMTI implementation.
>  >
>  >  It would be nice if you try to run some profiling tools on Harmony and
>  >  share your expirience.
>  >
>  >  Probably some VM gurus will reply with more details.
>  >
>  >  Thanks in advance.
>  >
>  >  SY, Alexey
>  >
>  >  2008/3/20, Simon Chow <si...@gmail.com>:
>  >
>  >
>  > > I found jprofiler can not work with Harmony now.
>  >  > Is there anything like jmap or HPROF? monitoring heap structure such as LOS,
>  >  > MOS, NOS etc.
>  >  > I think it is not only important to tunning application but also to
>  >  > facilitate the process of GC debugging for developer, isn't it?
>  >  >
>  >  > Thanks
>  >  > --
>  >  > From : Simon.Chow@Software School of Fudan University
>  >  >
>  >
>

Re: [jdk-tool][gc] Is there Heap monitoring and profiling tools in Harmony

[Eugene Ostrovsky <eu...@gmail.com>]

I expect Harmony to work with eclipse TPTP (http://www.eclipse.org/tptp/)
as it successfully passes TPTP tests on a regular basis.

On Thu, Mar 20, 2008 at 11:55 AM, Alexey Petrenko
<al...@gmail.com> wrote:
> As far as I know JVMTI is implemented in Harmony VM. So JVMTI based
>  profilers should work with Harmony, theoretically :)
>  However, it is possible that there are some bugs or missed
>  functionalities in JVMTI implementation.
>
>  It would be nice if you try to run some profiling tools on Harmony and
>  share your expirience.
>
>  Probably some VM gurus will reply with more details.
>
>  Thanks in advance.
>
>  SY, Alexey
>
>  2008/3/20, Simon Chow <si...@gmail.com>:
>
>
> > I found jprofiler can not work with Harmony now.
>  > Is there anything like jmap or HPROF? monitoring heap structure such as LOS,
>  > MOS, NOS etc.
>  > I think it is not only important to tunning application but also to
>  > facilitate the process of GC debugging for developer, isn't it?
>  >
>  > Thanks
>  > --
>  > From : Simon.Chow@Software School of Fudan University
>  >
>

Re: [jdk-tool][gc] Is there Heap monitoring and profiling tools in Harmony

[Alexey Petrenko <al...@gmail.com>]

As far as I know JVMTI is implemented in Harmony VM. So JVMTI based
profilers should work with Harmony, theoretically :)
However, it is possible that there are some bugs or missed
functionalities in JVMTI implementation.

It would be nice if you try to run some profiling tools on Harmony and
share your expirience.

Probably some VM gurus will reply with more details.

Thanks in advance.

SY, Alexey

2008/3/20, Simon Chow <si...@gmail.com>:
> I found jprofiler can not work with Harmony now.
> Is there anything like jmap or HPROF? monitoring heap structure such as LOS,
> MOS, NOS etc.
> I think it is not only important to tunning application but also to
> facilitate the process of GC debugging for developer, isn't it?
>
> Thanks
> --
> From : Simon.Chow@Software School of Fudan University
>

Re: [jdk-tool][gc] Is there Heap monitoring and profiling tools in Harmony

[Xiao-Feng Li <xi...@gmail.com>]

On Thu, Mar 20, 2008 at 2:34 PM, Simon Chow <si...@gmail.com> wrote:
> I found jprofiler can not work with Harmony now.
>  Is there anything like jmap or HPROF? monitoring heap structure such as LOS,
>  MOS, NOS etc.
>  I think it is not only important to tunning application but also to
>  facilitate the process of GC debugging for developer, isn't it?

Yes, that's why there is a GSoC project proposal for memory management
visualization.

What Alexey and Eugene pointed out are also useful for certain purpose.

Besides other tools, you can use -verbose:gc to get some information.

Thanks,
xiaofeng

>  Thanks
>  --
>  From : Simon.Chow@Software School of Fudan University
>



-- 
http://xiao-feng.blogspot.com