Date: Tue, 5 Apr 2016 01:14:46 +0000 From: Alexey Dokuchaev <danfe@FreeBSD.org> To: Andriy Gapon <avg@FreeBSD.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r297558 - in head/sys: kern sys x86/x86 Message-ID: <20160405011446.GA41944@FreeBSD.org> In-Reply-To: <201604041609.u34G9TCd022548@repo.freebsd.org> References: <201604041609.u34G9TCd022548@repo.freebsd.org>
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On Mon, Apr 04, 2016 at 04:09:29PM +0000, Andriy Gapon wrote: > New Revision: 297558 > URL: https://svnweb.freebsd.org/changeset/base/297558 > > Log: > new x86 smp topology detection code > > Previously, the code determined a topology of processing units > (hardware threads, cores, packages) and then deduced a cache topology > using certain assumptions. The new code builds a topology that > includes both processing units and caches using the information > provided by the hardware. Good work! On a related note, would it make it easier/possible to start thinking about if FreeBSD can export CPU cache information into userland? Some applications want these bits... Linux exports them via sysconf(3), back in 2003 bms@ proposed preliminary design [1] and suggested sysctl(3). ./danfe [1] https://lists.freebsd.org/pipermail/freebsd-hackers/2003-October/003604.html
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