On 07/06/11 21:36, Steve Kargl wrote: > On Wed, Jul 06, 2011 at 03:18:35PM -0400, Arnaud Lacombe wrote: >> Hi, >> >> On Wed, Jul 6, 2011 at 12:28 PM, Steve Kargl >> <sgk_at_troutmask.apl.washington.edu> wrote: >>> On Wed, Jul 06, 2011 at 05:29:24PM +0200, O. Hartmann wrote: >>>> I use SCHED_ULE on all machines, since it is supposed to be performing >>>> better on multicore boxes, but there are lots of suggestions switching >>>> back to the old SCHED_4BSD scheduler. >>>> >>> If you are using MPI in numerical codes, then you want >>> to use SCHED_4BSD. ?I've posted numerous times about ULE >>> and its very poor performance when using MPI. >>> >>> http://lists.freebsd.org/pipermail/freebsd-hackers/2008-October/026375.html >>> >> [sarcasm] >> It is rather funny to see that the post you point out has generated >> exactly 0 meaningful follow-up then and as you mention later in this >> thread, the issue still remains today :-) >> [/sarcasm] >> > Apparently, you are privy to my private email exchanges > with jeffr. > > I'm also not sure why you're being sarcastic here. The > issue was and AFAIK still is a problem for anyone using > FreeBSD in a HPC cluster. ULE simply performs worse than > 4BSD. > Well, I know only very little people using FreeBSD within a HPC cluster or even for scientific purposes, except myself and some people around here.Received on Wed Jul 06 2011 - 19:00:23 UTC
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