Messages in this thread |  | | Date | Sat, 18 Jan 1997 10:10:51 -0500 | From | "David S. Miller" <> | Subject | Re: 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 /_____________/ / // /_/ ><
|  |