Date: Sun, 24 Feb 2002 22:49:15 -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: critical_enter()/critical_exit() overheads in an SMP system Message-ID: <200202250649.g1P6nF746587@apollo.backplane.com> References: <20020224131027.I31343-100000@gamplex.bde.org> <200202241912.g1OJCMx95238@apollo.backplane.com> <20020224224927.D35990@locore.ca> <200202250603.g1P63fu46331@apollo.backplane.com>
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:pid 214 guid/sec 687816 Two TU's running, old critical_*()
:pid 214 guid/sec 687632 1.454 uS/call
:pid 214 guid/sec 687857
:pid 214 guid/sec 687887
:pid 214 guid/sec 667454 new critical_*()
:pid 214 guid/sec 667562 1.496 uS/call --> 41 nS
:pid 214 guid/sec 668551
:pid 214 guid/sec 668686
:pid 214 guid/sec 668789
Boy, I'm batting 0 tonight! Those numbers are reversed :-).
new_critical is the top number (the faster 1.454 uS/call) and
old_critical is the bottom number (1.496 uS/call).
-Matt
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