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Date: Thu, 1 Mar 2007 17:24:31 +0300
From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
To: Ingo Molnar <mingo@elte.hu>
Cc: Pavel Machek <pavel@ucw.cz>, Theodore Tso <tytso@mit.edu>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Ulrich Drepper <drepper@redhat.com>, linux-kernel@vger.kernel.org,
       Arjan van de Ven <arjan@infradead.org>,
       Christoph Hellwig <hch@infradead.org>, Andrew Morton <akpm@zip.com.au>,
       Alan Cox <alan@lxorguk.ukuu.org.uk>, Zach Brown <zach.brown@oracle.com>,
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       Davide Libenzi <davidel@xmailserver.org>,
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       Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
Message-ID: <20070301142430.GA25424@2ka.mipt.ru>
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On Thu, Mar 01, 2007 at 02:32:42PM +0100, Ingo Molnar (mingo@elte.hu) wrote:
> 
> * Evgeniy Polyakov <johnpol@2ka.mipt.ru> wrote:
> 
> > [...] that is why number for kevent is higher - it uses edge-triggered 
> > handler (which you asked to remove from epoll), [...]
> 
> no - i did not 'ask' it to be removed from epoll, i only pointed out 
> that with edge-triggered the results were highly unreliable here and 
> that with level-triggered it worked better. Just to make sure: if you 
> put back edge-triggered into evserver_epoll.c, do you get the same 
> numbers, and is CPU utilization still the same 98-100%?

No.
_Now_ it is about 1500-2000 req/sec with 10-20% CPU utilization. 
Number of 'Total transferred' and 'HTML transferred' does
not equal to 80000 multiplied by size of the page.

That are strange tests actually - I managed to get 9000 requests per
second from epoll server (only once!) and 8900 from kevent (two times
only), sometimes they both drop down to 2300-2700 req/s.

> 	Ingo

-- 
	Evgeniy Polyakov