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(parent: 3424dab) | patch
metag: perf: fix wrap handling in delta calculation
authorJames Hogan <james.hogan@imgtec.com>
Wed, 27 Feb 2013 16:16:38 +0000 (16:16 +0000)
committerJames Hogan <james.hogan@imgtec.com>
Fri, 15 Mar 2013 13:19:54 +0000 (13:19 +0000)
commitc43ca04b5e7854b3996f84a495e4553941e76266
tree73cd4ed7b8ef214b8d9cd366611b566303628a2etree | snapshot
parent3424dabb6508d538e9ec1a2aa889fefbd83df2d0commit | diff
metag: perf: fix wrap handling in delta calculation

When calculating the delta, mask with MAX_PERIOD (24 bits) to handle
wrapping, which particularly happens with periodic sampling since the
value is intentionally set so that it will overflow soon.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
arch/metag/kernel/perf/perf_event.c diff | blob | history
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