Date: Sun, 24 Feb 2002 21:26:25 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Jake Burkholder <jake@locore.ca>, Bruce Evans <bde@zeta.org.au>, Terry Lambert <tlambert2@mindspring.com>, Alfred Perlstein <alfred@FreeBSD.ORG>, Bosko Milekic <bmilekic@unixdaemons.com>, Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp>, current@FreeBSD.ORG, John Baldwin <jhb@FreeBSD.ORG> Subject: Re: Patch for critical_enter()/critical_exit() & interrupt assembly revamp, please review! Message-ID: <200202250526.g1P5QPU44837@apollo.backplane.com> References: <20020224131027.I31343-100000@gamplex.bde.org> <200202241912.g1OJCMx95238@apollo.backplane.com> <20020224224927.D35990@locore.ca>
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: Removing cli and sti from the critical functions saves us 300 ns on
I'm going to make a correction here... I didn't realize I had WITNESS
turned on. 300ns of savings makes a lot of sense when WITNESS is turned
on because witness manipulates a number of spin locks.
I am going to rerun the test on a 2xCPU box without WITNESS.
-Matt
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