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Posted to dev@tomcat.apache.org by Remy Maucherat <re...@apache.org> on 2002/11/25 10:58:00 UTC
Optimizing Coyote
Hi,
Many optimizations in Coyote HTTP/1.1 are quite straightforward, but
some others are more difficult.
Right now, I'm "stuck" trying to optimize the amount of get/setSoTimeout
method calls. Each of them is relatively expensive, and probably ends up
exercizing the network stack more than we would like. I will try to
experiment and commit things. Can you review them Bill ?
Thanks,
Remy
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Re: Optimizing Coyote
Posted by Remy Maucherat <re...@apache.org>.
Bill Barker wrote:
> At least with the Solaris TCP stack, the SoTimeouts make no difference at
> all to the 'ab' times. However, it's easy enough to make it a configuration
> option.
Thanks for doing it :)
I don't know if it ends up impacting actual benchmarks (although it may
depend on the platform, as it ends up with a native call), but it shows
up in the CPU profiler with OptimizeIt, and I thought it wouldn't hurt
to try to improve this.
Remy
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Re: Optimizing Coyote
Posted by Bill Barker <wb...@wilshire.com>.
At least with the Solaris TCP stack, the SoTimeouts make no difference at
all to the 'ab' times. However, it's easy enough to make it a configuration
option.
----- Original Message -----
From: "Bill Barker" <wb...@wilshire.com>
To: "Tomcat Developers List" <to...@jakarta.apache.org>
Sent: Monday, November 25, 2002 11:54 AM
Subject: Re: Optimizing Coyote
> I'm surprised at the expense: I had thought that this should be little
more
> than setting a note in the O/S kernel. It's also pretty much what
> Apache/httpd 2.0 does, at least last time I looked.
>
> However, I'll take another look at them.
>
> ----- Original Message -----
> From: "Remy Maucherat" <re...@apache.org>
> To: "Tomcat Developers List" <to...@jakarta.apache.org>
> Sent: Monday, November 25, 2002 1:58 AM
> Subject: Optimizing Coyote
>
>
> > Hi,
> >
> > Many optimizations in Coyote HTTP/1.1 are quite straightforward, but
> > some others are more difficult.
> >
> > Right now, I'm "stuck" trying to optimize the amount of get/setSoTimeout
> > method calls. Each of them is relatively expensive, and probably ends up
> > exercizing the network stack more than we would like. I will try to
> > experiment and commit things. Can you review them Bill ?
> >
> > Thanks,
> > Remy
> >
> >
> > --
> > To unsubscribe, e-mail:
> <ma...@jakarta.apache.org>
> > For additional commands, e-mail:
> <ma...@jakarta.apache.org>
> >
>
>
> --
> To unsubscribe, e-mail:
<ma...@jakarta.apache.org>
> For additional commands, e-mail:
<ma...@jakarta.apache.org>
>
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Re: Optimizing Coyote
Posted by Remy Maucherat <re...@apache.org>.
Bill Barker wrote:
> I'm surprised at the expense: I had thought that this should be little more
> than setting a note in the O/S kernel. It's also pretty much what
> Apache/httpd 2.0 does, at least last time I looked.
>
> However, I'll take another look at them.
It's not *that* expensive, it's just that it shows up in the profile. In
the end, all the calls add up, so it should be optimized IMO.
I does a few things, and then ends up using a native method in the end
(I think that's relatively expensive in Java; I don't know much about
performance when dealing with native bits though).
Remy
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Re: Optimizing Coyote
Posted by Bill Barker <wb...@wilshire.com>.
I'm surprised at the expense: I had thought that this should be little more
than setting a note in the O/S kernel. It's also pretty much what
Apache/httpd 2.0 does, at least last time I looked.
However, I'll take another look at them.
----- Original Message -----
From: "Remy Maucherat" <re...@apache.org>
To: "Tomcat Developers List" <to...@jakarta.apache.org>
Sent: Monday, November 25, 2002 1:58 AM
Subject: Optimizing Coyote
> Hi,
>
> Many optimizations in Coyote HTTP/1.1 are quite straightforward, but
> some others are more difficult.
>
> Right now, I'm "stuck" trying to optimize the amount of get/setSoTimeout
> method calls. Each of them is relatively expensive, and probably ends up
> exercizing the network stack more than we would like. I will try to
> experiment and commit things. Can you review them Bill ?
>
> Thanks,
> Remy
>
>
> --
> To unsubscribe, e-mail:
<ma...@jakarta.apache.org>
> For additional commands, e-mail:
<ma...@jakarta.apache.org>
>
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