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From Pier Fumagalli <p...@betaversion.org>
Subject Re: Worker + MaxClient ...
Date Tue, 11 Jun 2002 17:35:15 GMT
"Pier Fumagalli" <pier@betaversion.org> wrote:

> I just recompiled the latest HEAD on nagoya, and doing some performance
> analysis.... One thing I noticed is that when someone hits "MaxClients",
> performances go down to be dog-slow... IIRC, this was a known bug of Worker,
> but wasn't it supposed to be fixed?
> 
> I'm currently trying it out with a 64-bits compiled binary, but will do the
> same once the 32-bits one gets baked... It just looks really weird..

>From time to time, 3 times over 10k requests today for manual/index.html,
2.0.38-dev as of this morning segfaults when it is compiled at 64bits under
Solaris-8, with lightweight processes used instead of threads, and
concurrency greater than 1000...

But it didn't dump the core, so, can't do much with it (still need to find
out all those nice CC flags for Sun's compilers)...

BTW, when running with the default threading library, it works just fine.

Here are some results of the tests... The machine is an E450 with 10 Mbps of
network, 1 gig ram, and 2 UltraSPARC/II-400 processors... The remote client
is an ultra 5 connected on the same hub...

The relevant part of the configuration are:

    StartServers        4
    ThreadLimit         256
    ThreadsPerChild     256
    MaxRequestsPerChild 0

Then it's all default... Have fun...

--- 64 BIT REMOTE -----------------------------------------

Concurrency Level:      1000
Total transferred:      104587192 bytes
Requests per second:    89.47 [#/sec] (mean)
Transfer rate:          935.73 [Kbytes/sec] received

Concurrency Level:      100
Total transferred:      103015852 bytes
Requests per second:    95.86 [#/sec] (mean)
Transfer rate:          987.51 [Kbytes/sec] received

--- 32 BIT REMOTE -----------------------------------------

Concurrency Level:      1000
Total transferred:      104265004 bytes
Requests per second:    92.75 [#/sec] (mean)
Transfer rate:          967.06 [Kbytes/sec] received

Concurrency Level:      100
Total transferred:      102898755 bytes
Requests per second:    96.28 [#/sec] (mean)
Transfer rate:          990.75 [Kbytes/sec] received


--- 64 BIT LOCAL ------------------------------------------

Concurrency Level:      100
Total transferred:      102840000 bytes
Requests per second:    538.77 [#/sec] (mean)
Transfer rate:          5410.81 [Kbytes/sec] received

Concurrency Level:      100 (LWP)
Total transferred:      102840000 bytes
Requests per second:    482.60 [#/sec] (mean)
Transfer rate:          4846.72 [Kbytes/sec] received

Concurrency Level:      1000
Total transferred:      102840000 bytes
Requests per second:    95.62 [#/sec] (mean)
Transfer rate:          960.35 [Kbytes/sec] received

Concurrency Level:      1000 (LWP) [Segmentation fault]
Total transferred:      102840000 bytes
Requests per second:    99.77 [#/sec] (mean)
Transfer rate:          1001.95 [Kbytes/sec] received

--- 32 BIT LOCAL ------------------------------------------

Concurrency Level:      100
Total transferred:      102730000 bytes
Requests per second:    522.13 [#/sec] (mean)
Transfer rate:          5238.06 [Kbytes/sec] received

Concurrency Level:      100 (LWP)
Total transferred:      102730000 bytes
Requests per second:    547.79 [#/sec] (mean)
Transfer rate:          5495.51 [Kbytes/sec] received

Concurrency Level:      1000
Total transferred:      102730000 bytes
Requests per second:    91.36 [#/sec] (mean)
Transfer rate:          916.54 [Kbytes/sec] received

Concurrency Level:      1000 (LWP)
Total transferred:      102730000 bytes
Requests per second:    99.43 [#/sec] (mean)
Transfer rate:          997.46 [Kbytes/sec] received

    Pier


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