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Date: Tue, 31 Oct 2000 02:00:27 +1100
From: Andrew Morton <andrewm@uow.edu.au>
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To: kumon@flab.fujitsu.co.jp
CC: dean gaudet <dean-list-linux-kernel@arctic.org>,
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Subject: Re: [PATCH] Re: Negative scalability by removal of lock_kernel()?(Was: 
 Strange performance behavior of 2.4.0-test9)
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kumon@flab.fujitsu.co.jp wrote:
> 
> Andrew Morton writes:
>  >
>  > I agree with me.  Could you please test the scalability
>  > of this?
> 
> Here is the result, measured on 8-way profusion.

Thank you!

> Andrew posted two paches, so called P1 and P2.

Was `P2' the shorter one?   It looks like it.

>                 Req/s
> test10-pre5:    2255    bad performance
> ----
> test9+P2:       5243
> test10-pre5+P1: 5187
> test10-pre5+P2: 5258
> 
> P2 may be a little bit better.

I'd be interested in seeing the -DSINGLE_LISTEN_UNSERIALIZED_ACCEPT
figures.

Dean,  it looks like the same problem will occur with flock()-based
serialisation.  Does Apache/Linux ever use that option?
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