On 7/6/11, Hartmann, O. <ohartman_at_zedat.fu-berlin.de> wrote: > 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. > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" > http://lists.freebsd.org/pipermail/freebsd-stable/2010-September/thread.html#58537Received on Wed Jul 06 2011 - 20:13:21 UTC
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