From owner-freebsd-arch  Sun Feb 17 23:12:16 2002
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Date: Sun, 17 Feb 2002 23:11:55 -0800
From: Terry Lambert <tlambert2@mindspring.com>
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To: Matthew Dillon <dillon@apollo.backplane.com>
Cc: Bruce Evans <bde@zeta.org.au>,
	Poul-Henning Kamp <phk@critter.freebsd.dk>,
	Julian Elischer <julian@elischer.org>,
	Alfred Perlstein <bright@mu.org>, arch@FreeBSD.ORG, jhb@FreeBSD.ORG,
	peter@wemm.org, jake@locore.ca
Subject: Re: gettimeofday() and crhold()/crfree() (was Re:  
 gettimeofday()andcopyout().Is copyout() MPSAFE on non-i386 archs? )
References: <20020218144148.F4583-100000@gamplex.bde.org> <200202180409.g1I49vj10455@apollo.backplane.com>
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Matthew Dillon wrote:
>     Just a note:  The gettimeofday() has an overhead of only 2-3 uS in
>     -current.  Squid would have to be doing an aweful lot of transactions
>     for it to matter and even if it did, if that actually turned out to be the
>     bottleneck I'll eat my hat.  And if I wind up eating my hat the next
>     thing I'll do is spend the necessary 5 seconds writing a little code
>     to make squid only call gettimeofday every 5th time.

It was a lot of transactions...

22,000 HTTP 1.1 requests per second.

Obviously, it wasn't squid code (8-)), but the logging
requirement was the same because of the preexisiting
squid log digest software, and the statistics gathering
necessary to be comparable with competing products.

-- Terry

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