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

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Date:	Thu, 22 Feb 2007 05:41:27 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	johnpol@....mipt.ru
Cc:	arjan@...radead.org, mingo@...e.hu, drepper@...hat.com,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	hch@...radead.org, akpm@....com.au, alan@...rguk.ukuu.org.uk,
	zach.brown@...cle.com, suparna@...ibm.com, davidel@...ilserver.org,
	jens.axboe@...cle.com, tglx@...utronix.de
Subject: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

From: Evgeniy Polyakov <johnpol@....mipt.ru>
Date: Thu, 22 Feb 2007 15:39:30 +0300

> It does not matter - even with threads cost of having thousands of
> threads is _too_ expensive. So, IMO, it is wrong to have to create 
> 20k threads for the simple web server which only sends one index page to
> 80k connections with 4k connections per seconds rate.
> 
> Just have that example in mind - more than 20k blocks in 80k connections 
> over gigabit lan, and it is likely optimistic result, when designing new 
> type of AIO.

I totally agree with Evgeniy on these points.

Using things like syslets and threadlets for networking I/O
is not a very good idea.  Blocking is more the norm than the
exception for networking I/O.

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