Date: Mon, 25 Jun 2018 17:48:43 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Jeff Roberson <jeff@FreeBSD.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r335579 - head/sys/vm Message-ID: <20180625144843.GB2488@zxy.spb.ru> In-Reply-To: <201806230810.w5N8AAr2037440@repo.freebsd.org> References: <201806230810.w5N8AAr2037440@repo.freebsd.org>
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On Sat, Jun 23, 2018 at 08:10:10AM +0000, Jeff Roberson wrote: > Author: jeff > Date: Sat Jun 23 08:10:09 2018 > New Revision: 335579 > URL: https://svnweb.freebsd.org/changeset/base/335579 > > Log: > Sort uma_zone fields according to 64 byte cache line with adjacent line > prefetch on 64bit architectures. Prior to this, two lines were needed > for the fast path and each line may fetch an unused adjacent neighbor. > - Move fields used by the fast path into a single line. > - Move constants into the adjacent line which is mostly used for > the spare bucket alloc 'medium path'. > - Unpad the mtx which is only used by the fast path and place it in > a line with rarely used data. This aligns the cachelines better and > eliminates 128 bytes of wasted space. > > This gives a 45% improvement on a will-it-scale test on a 24 core machine. Can this commint mergered to stable/11? Or this commit depends on other commits?
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