Date: Tue, 3 Apr 2001 21:06:35 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Alfred Perlstein <alfred@FreeBSD.org> Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/sys mbuf.h src/sys/kern uipc_mbuf.c Message-ID: <200104040106.VAA26103@khavrinen.lcs.mit.edu> In-Reply-To: <20010403173529.O12164@fw.wintelcom.net> References: <200104030315.f333FCX69312@freefall.freebsd.org> <20010403140457.B2952@electricjellyfish.net> <200104031813.f33ID4b58965@earth.backplane.com> <20010403194004.A15434@technokratis.com> <200104040020.f340Kgi74269@earth.backplane.com> <20010403173529.O12164@fw.wintelcom.net>
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<<On Tue, 3 Apr 2001 17:35:29 -0700, Alfred Perlstein <alfred@FreeBSD.org> said: > While this is a good idea, it doesn't give us a consistant view of > the stats without additional atomic ops or critical regions. Atomic operations are likely to be cheaper on modern platforms than locking. In any case, you can simply keep per-CPU stats and then summarize when they are requested, which is even cheaper, since the stats are updated FAR more frequently than they are inspected. -GAWollman To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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