Subject: Re: scheduler woes on MPACPI kernel
To: Frank van der Linden <firstname.lastname@example.org>
From: Johnny Billquist <bqt@Update.UU.SE>
Date: 01/18/2005 23:14:40
On Tue, 18 Jan 2005, Frank van der Linden wrote:
> On Tue, Jan 18, 2005 at 10:53:26PM +0100, Johnny Billquist wrote:
>> Huh? I didn't understand this...
>> Are you claiming that a finer grained lock will decrease performance? Or
>> is there a serious bug in the Linux kernel?
> For an HT system, finer grained locks can have the effect of increasing
> the problem of virtual CPUs competing for e.g. cache and TLB entries. Thus
> making the system slower.
Hmm. I haven't given much thought on how much impact shared cache and TLB
can have. Is it really that bad?
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: email@example.com || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol