Date: Fri, 24 Sep 2010 07:40:03 GMT From: Dmitry Kubov <dk@garant.ru> To: freebsd-acpi@FreeBSD.org Subject: Re: i386/135447: [i386] [request] Intel Core i7 and Nehalem-EP new features not supported Message-ID: <201009240740.o8O7e3FH031927@freefall.freebsd.org>
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The following reply was made to PR i386/135447; it has been noted by GNATS.
From: Dmitry Kubov <dk@garant.ru>
To: Alexander Motin <mav@FreeBSD.org>
Cc: Andriy Gapon <avg@FreeBSD.org>, jh@FreeBSD.org,
bug-followup <bug-followup@FreeBSD.org>
Subject: Re: i386/135447: [i386] [request] Intel Core i7 and Nehalem-EP new
features not supported
Date: Fri, 24 Sep 2010 11:34:51 +0400
> Dmitry Kubov wrote:
>> Is it possible to stick running threads to same CPU core for longer time
>> to avoid C-states latencies penalty?
> man 1 cpuset
>
Its static assignment, requires scheduling all tasks by hand.
cpuset -l 7 ubench -cs
Ubench Single CPU: 453051 (0.40s)
less than 1% boost.
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