linux-kernel - Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

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Date:	Thu, 01 Mar 2007 21:34:11 +0100
From:	Johann Borck <johann.borck@...sedata.com>
To:	David Lang <david.lang@...italinsight.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

David Lang wrote:
>
> On Thu, 1 Mar 2007, Johann Borck wrote:
>
>> I reported this a while ago and suggested to have the number of 
>> pending accepts reported with the event to save that last syscall.
>> I  created an ab replacement based on kevent, and at least with my 
>> machines, which are comparable to each other, the load on client 
>> dropped from 100% to 2% or something. ab just doesn't give meaningful 
>> results  (if the client is not way more powerful). With that new 
>> client I get very similar results for epoll and kevent, from 1000 
>> through to 26000 concurrent requests, the results have been posted on 
>> kevent-homepage in october, I just checked it with new version, but 
>> there's no significant difference.
>>
>> this is the benchmark with kevent-based client:
>> http://tservice.net.ru/~s0mbre/blog/2006/10/11#2006_10_11
>> btw, each result is average over 1,000,000 requests
>>
>> and just for comparison, this is on the same machines using ab:
>> http://tservice.net.ru/~s0mbre/blog/2006/10/08#2006_10_08
>
> is this client avaialble? and what patches need to be added to the 
> kernel to use it?
>
It's based on an older version of kevent, so I'll have to adapt it a bit 
for use with recent patch, no other than kevent is necessary. I'll post 
a link when it's cleaned up, if you want.

Johann
> David Lang
>

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