Subject: RE: Performance Monitoring Capabilities in PowerPC (PMC counters
To: 'Matt Thomas' <email@example.com>
From: Dheeraj Pandey <firstname.lastname@example.org>
Date: 02/06/2003 17:58:35
> pmc is used on arm (xscale) and i386. the pmc stuff has not yet been
> defined for powerpc yet. We really do need it for powerpc
> and we should figure which of the PMC counter we should support.
I really like Linux's implementation of using /proc filesystem to get/set
PMC. Anyhow, the set of PMC counters to support can always be refined with
time. If we start supporting some of the basic ones, e.g.
6 - # of cycles spent in table search for ITLB accesses
7 - # of L2 hits
5 - # of L1 instruction cache misses
6 - # of ITLB misses
7 - # of L2 instruction misses
5 - # of L1 data cache misses
6 - # of DTLB misses
7 - # of L2 data misses
5 - # of L2 castouts
6 - # of cycles spent in table search for DTLB accesses
8 - # of mispredicted branches
Once we have s'thing working, we can always add onto it.