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DateSat, 18 Jan 1997 10:10:51 -0500
From"David S. Miller" <>
SubjectRe: HZ=1000 & kernel profiling?
   Date: 	Sat, 18 Jan 1997 16:03:20 +0100 (MET)
   From: Ingo Molnar <mingo@pc5829.hil.siemens.at>

   is anyone using HZ=1000 plus kernel profiling? The profiling output
   should get sqrt(10) more precision this way ...

   [just wanted to know wether i have to back up my HD before trying
   it :)]

It has been done on the Sparc.  In fact I think we got it clicking up
to a HZ of 10,000 at one point.  The profiling was so fine that you
could actually see exactly which load/store instructions were missing
the cache more often than others in memcpy/memset/csum_partial etc.
Pipeline stalls were extremely visible as well.

---------------------------------------------////
Yow! 11.26 MB/s remote host TCP bandwidth & ////
199 usec remote TCP latency over 100Mb/s   ////
ethernet.  Beat that!                     ////
-----------------------------------------////__________  o
David S. Miller, davem@caip.rutgers.edu /_____________/ / // /_/ ><
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