Subject: Re: scheduler woes on MPACPI kernel
To: Johnny Billquist <bqt@Update.UU.SE>
From: Frank van der Linden <fvdl@netbsd.org>
List: current-users
Date: 01/18/2005 23:04:20
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.
- Frank