Messages in this thread | | | Date | Mon, 1 Jun 2015 15:02:23 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCH 04/10] perf, tools, report: Add processing for cycle histograms |
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On Tue, May 26, 2015 at 07:37:30PM +0200, Andi Kleen wrote: > > hum, so this is assuming that having cycles fort 1st entry > > means there'll be for the rest? > > Also in that case why is there the '!= cycles' check within > > addr_map_symbol__account_cycles ? > > > It means there might be. It's just a short cut. But rarely > branches may still have 0 cycles, so it still needs to be > checked later. > > In theory it could miss a valid one if the first happened > to be zero, but that seems very unlikely.
so having 'bs->entries[0].flags.cycles' is the only way of knowing that we have the feature enabled?
jirka
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