From: Matt Chapman <matthewc@cse.unsw.edu.au>
To: linux-ia64@vger.kernel.org
Subject: [Linux-ia64] Strange performance monitoring results
Date: Fri, 10 May 2002 09:20:06 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590701905566@msgid-missing> (raw)
* Linux 2.4.18-ia64-020508 (CONFIG_PERFMON, !CONFIG_DISABLE_VHPT)
* pfmon 1.0
* Uniprocessor Itanium C1-step
* lat_ctx from LMbench 2.0p2 (ftp://ftp.bitmover.com/lmbench/)
(Though I get the same results with 2.4.16 and pfmon 0.06a.)
% pfmon -e ITLB_MISSES_FETCH,ITLB_INSERTS_HPW ./lat_ctx 5
"size=0k ovr=2.65
5 2.52
221400 ITLB_MISSES_FETCH
133 ITLB_INSERTS_HPW
The ITLB misses figure seems much too big, especially given the number
of hardware pagetable walker inserts is low. Every few times I also get
very big figures for DTLB_MISSES, although not DTC_MISSES (I would have
thought DTLB_MISSES should be less than DTC_MISSES?).
Am I doing something wrong?
Matt
next reply other threads:[~2002-05-10 9:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-10 9:20 Matt Chapman [this message]
2002-05-16 16:31 ` [Linux-ia64] Strange performance monitoring results Stephane Eranian
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