Date: Sat, 23 Dec 1995 19:57:23 -0800 From: David Greenman <davidg@Root.COM> To: Torbjorn Granlund <tege@matematik.su.se> Cc: freebsd-hackers@freebsd.org Subject: Re: Pentium bcopy Message-ID: <199512240357.TAA00460@corbin.Root.COM> In-Reply-To: Your message of "Sat, 23 Dec 95 19:27:52 PST." <199512240327.TAA00354@corbin.Root.COM>
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> Anyway, your optimization looks interesting and I do intend to try it out. >Thanks for your efforts and please don't get too discouraged. I need to do some more testing, but a quick test shows that for copying page-sized amounts, it's about 5% faster than bcopy on a 150Mhz P6 (Orion) and about 25% faster on a 90Mhz Pentium (Triton, PB cache). ...not 5 times faster, but definately an improvement. Thanks! -DG 150Mhz P6: [corbin:davidg] ./copytest copy 8617 bcopy 9069 17.686u 0.000s 0:17.70 99.8% 35+230k 0+0io 0pf+0w 90Mhz P5: [implode:davidg] ./copytest copy 22724 bcopy 28490 51.214u 0.015s 0:51.34 99.7% 35+232k 0+0io 0pf+0w
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