Re: freebsd vs linux: performance problem
- From: Erich Dollansky <oceanare@xxxxxxxxxxxxxx>
- Date: Fri, 14 Dec 2007 12:41:10 +0800
Hi,
Shantanu Ghosh wrote:
--- Erich Dollansky <oceanare@xxxxxxxxxxxxxx> wrote:
Shantanu Ghosh wrote:--- Erich Dollansky <oceanare@xxxxxxxxxxxxxx> wrote:I have had once the problem of a task moving from CPU to CPU and s performing badly on FreeBSD.
I am not informed how this is handled currently.
This could be something I am facing. I noticed that when I run vmstat
while running this code, on linux, there's hardly any perceptible
difference in the number of context switches, but on freebsd, the
number of context switches in the system seems to go up a bit. However,
this is not very reliable.
Do you know how I can check this migration?
I forgot how I checked it.
While I have not tried it on this machine, on a single cpu machine, the
non-SMP build of freebsd seems to perform as well as linux for this
kind of test.
Ok, this could then be a hint that the task is simply migrating.
Thanks a lot for your help.
No not praise the day before night falls.
Erich
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