Date: Mon, 22 Feb 1999 13:25:56 +1030 (CST) From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: tcobb@staff.circle.net Cc: stable@FreeBSD.ORG Subject: RE: SMP and libc_r Message-ID: <XFMail.990222132556.doconnor@gsoft.com.au> In-Reply-To: <A0CFA284C004D211B7EE0060082F32A412E273@freya.circle.net>
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On 22-Feb-99 tcobb@staff.circle.net wrote: > Should I expect to see performance improvements with SMP > and a multithreaded app using libc_r? The app in question No :( Not yet anyway :) > is MySQL and doing the sql benchmarks with an SMP (dual pII 350) > and non-smp kernel for the same box, I see much faster > times with the non-smp version. The SMP kernel spends more time in system locks over the entire kernel which is a bit annoying. SMP works much better for things like multiple CPU intensive processes, it works really badly on multiple IO intensive apps (because the all wait for the big kernel lock) --- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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