Date: Wed, 14 Jan 2004 13:03:40 -0600 From: Peter Schultz <pmes@bis.midco.net> To: "Andrew Edwards (Olympic Shaver Centre)" <andrew@shavers.co.uk> Cc: freebsd-current@freebsd.org Subject: Re: Hyperthreading with SMP in 5.2 Message-ID: <4005928C.6050507@bis.midco.net> In-Reply-To: <003c01c3da8f$c022a3e0$0b00a8c0@laptop> References: <003c01c3da8f$c022a3e0$0b00a8c0@laptop>
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Andrew Edwards (Olympic Shaver Centre) wrote: > Could anyone clarify the level of support for Pentium 4 > hyperthreading in 5.2? Virtual SMP lags as literal SMP still isn't even fully tuned. > i.e if I run a single cpu heavy process, whereas without > hyperthreading I would see 100% usage now I only see around 50%. > The program itself has got to be written with SMP in mind in order to accomplish that. You'll never have perfect CPU utilization. Maybe with some superconductive quantum computer or some such futuristic thing. :-) Pete...
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