Date: Tue, 3 Apr 2001 17:45:12 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: Alfred Perlstein <alfred@FreeBSD.ORG> Cc: Bosko Milekic <bmilekic@technokratis.com>, Garrett Rooney <rooneg@electricjellyfish.net>, 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: <200104040045.f340jCW75337@earth.backplane.com> 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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:> require any (mutex) locking at all? This solves the contention problem
:> and the interrupt problem.
:
:While this is a good idea, it doesn't give us a consistant view of
:the stats without additional atomic ops or critical regions.
:
:--
:-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
Good god, don't waste time trying to optimize the statistics! If you
are worried, just make the stats counters per-cpu and have the
utilities add them up on the fly, and be done with it. No locking, no
locked instructions, no fuss, no muss.
-Matt
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