I think Fintan means this bug:
6292199 bcopy and kcopy should'nt use rep, smov
Fintan Ryan stated:
< Hi,
<
< This is being tracked in bugid 6291299 [1].
<
< - Fintan
<
< On Mon, Sep 12, 2005 at 08:30:42PM +0400, [EMAIL PROTECTED] wrote:
< <
< <
< < Hi,
< <
< < I have noticed that the amd64 version of kcopy() uses the same "rep smov"
< < the i386 version use.
< <
< < The AMD's "Opteron Optimization Guide" states that it is a wrong decision:
< <
< < see the chapters:
< <
< < 5.12 Appropriate Memory Copying Routines
< <
< < 8.3 Repeated String Instructions
< <
< < As far as I can tell kcopy() is the function kernel spends considerable
< < time in.
< <
< < thanks,
< < Alexander
< <
< <
< < _______________________________________________
< < perf-discuss mailing list
< < [email protected]
<
< --
< [EMAIL PROTECTED] http://blogs.sun.com/fintanr
< @dub03 http://wwws.sun.com/software/solaris/10
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--
Sean.
.
sean DoT mcgrath At sun.com http://blogs.sun.com/smg
http://www.sun.com/software/solaris
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