From owner-freebsd-hackers  Sat Dec 23 19:57:27 1995
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To: Torbjorn Granlund <tege@matematik.su.se>
cc: freebsd-hackers@freebsd.org
Subject: Re: Pentium bcopy 
In-reply-to: Your message of "Sat, 23 Dec 95 19:27:52 PST."
             <199512240327.TAA00354@corbin.Root.COM> 
From: David Greenman <davidg@Root.COM>
Reply-To: davidg@Root.COM
Date: Sat, 23 Dec 1995 19:57:23 -0800
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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