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. -- SteveReceived on Wed Jul 06 2011 - 17:36:37 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:40:15 UTC