Subject: Re: scheduler woes on MPACPI kernel
To: None <email@example.com>
From: Frank van der Linden <firstname.lastname@example.org>
Date: 01/18/2005 23:08:12
On Tue, Jan 18, 2005 at 08:25:51PM +0000, email@example.com wrote:
> So there is no point in having MP system if it actually increases total
> time :-)
> Somebody did a benchmark recently of NetBSD vs FreeBSD and NetBSD came
> on top. So people said if it was done on a MP system, FreeBSD would be
> faster, due to finer-grained locking, etc. Any ideas if that's true?
That depends, highly, on the kind of benchmark in question. For threaded
benchmarks that spend a fair amount of time in the kernel, finer grained
locking should win out. Problem is, that not many of those seem to
exist. It'd be interesting to see actual real-world application comparisons
for such situations.