Date: Sat, 16 Dec 2006 12:47:00 -0800 (PST) From: Simon Roberts <thorpflyer@yahoo.com> To: freebsd-hackers@freebsd.org Subject: Re: "Syncing cpus" on a multi-cpu, dual core system Message-ID: <20061216204701.9754.qmail@web60917.mail.yahoo.com>
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=0A----- Original Message ----=0AFrom: Stephen Montgomery-Smith <stephen@ma= th.missouri.edu>=0A=0A...snip snip...=0A=0AThe other thing I have noticed i= s that when I split jobs using threads =0Aso that I can use several process= ors, the speed up to the program is far =0Aless than one might expect - ind= eed sometimes it even gets slower.=0A=0AStephen=0A=0A----------------------= ---------------------------------------------------------------------------= --------=0A=0AThis is probably Amdahl's law.=0A=0ASimon=0A=0A=0A=0A=0A=0A__= ________________________________________________=0ADo You Yahoo!?=0ATired o= f spam? Yahoo! Mail has the best spam protection around =0Ahttp://mail.yah= oo.com
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