linux-kernel - Re: Linux 2.6.23

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Message-ID: <20071011133211.GA5510@elte.hu>
Date:	Thu, 11 Oct 2007 15:32:11 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Cc:	Nicholas Miell <nmiell@...cast.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.23


* Zhang, Yanmin <yanmin_zhang@...ux.intel.com> wrote:

> > ( Config is at http://redhat.com/~mingo/misc/config, system is Core2Duo
> >   1.83 GHz, mysql-5.0.45, glibc-2.6. Nothing fancy either in the config
> >   nor in the setup - everything is pretty close to the defaults. )
>
> I used FedoraCore 8 Test2 distribution, so glibc-2.6.90-13 already 
> fixed the old malloc scalability issue. Cpu is 2.66GHZ quad core, 2 
> physical processor, totally 8 cores. The regression is about 28%.

thanks for confirming this! I've updated glibc and mysql and now i can 
reproduce something similar. (I have a theory about the reason of this 
regression, and i'm working on a test-patch.)

	Ingo
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