On Thu, Jul 17, 2014 at 05:31:14PM +0900, Namhyung Kim wrote: > Hi Peter, > > On Thu, Jul 17, 2014 at 5:26 PM, Peter Zijlstra <[email protected]> wrote: > > On Thu, Jul 17, 2014 at 05:21:06PM +0900, Namhyung Kim wrote: > >> When perf stat runs multiple times via -r option, it's sometimes > >> useful for a workload to know which run it executing. So pass new > >> PERF_STAT_RUN environment variable to the workload for each run > >> (starting from 1). > > > > This seems counter intuitive, runs should be _identical_ otherwise > > there's no point. That means the workload should very much _not_ know > > these things. > > But I think it can be useful if a workload wants to save logfiles > based on the iteration number for example. If it doesn't want, it can > just ignore. :)
That's the wrong way around. Also, there's --pre and --post hooks to preserve logfiles if you really have to do that kind of thing.
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