Date: Fri, 18 Sep 2009 21:49:57 +0000 From: "b. f." <bf1783@googlemail.com> To: freebsd-amd64@FreeBSD.org Cc: jeff@FreeBSD.org Subject: Re: new to amd64 Message-ID: <d873d5be0909181449h55c87dfdp280d1fd3a7d5749a@mail.gmail.com>
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Steve Kargl wrote:
>
>If you are running any floating point intensive applications
>and these applications are multithreaded, you may want to use
>the 4BSD scheduler rathar than ULE. The last time I tested
>ULE with an MPI application, it display miserable performance
>on a dual, quad-core opteron system.
Have you made any attempt to analyze this problem, or discussed it
with the primary author of ULE? If so, to what do you attribute the
poor performance, and do you have any ideas on how to improve ULE
performance in this context?
Regards,
b.
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