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authorFrederic Weisbecker <fweisbec@gmail.com>2010-07-08 03:41:46 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2010-07-08 06:26:56 +0200
commit108553e1f3c45a92d23681a378ad9e4c3230eebc (patch)
tree27cde88dbb3ec8438d100032135e845bd43ad92d /include
parent97aa1052739c6a06cb6b0467dbf410613d20bc97 (diff)
downloadlinux-2.6.34-ux500-108553e1f3c45a92d23681a378ad9e4c3230eebc.tar.gz
perf: Sync callchains with period based hits
Hists have their hits increased by the event period. And this period based counting is the foundation of all the stats in perf report. But callchains still use the raw number of hits, without taking the period into account. So when we compute the percentage, absolute based percentages are totally broken, and relative ones too in the first parent level. Because we pass the number of events muliplied by their period as the total number of hits to the callchain filtering, while callchains expect this number to be the number of raw hits. perf report -g graph was simply not working, showing no graph unless the min percent was zero. And even there the percentage of the branches was always 0. And may be fractal filtering was broken on the first branch level too. flat also was broken, but it was hidden because of other breakages. Anyway fix this by counting using periods on callchains. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org>
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