Messages in this thread | | | Date | Thu, 28 May 2009 21:09:59 +1000 | From | Paul Mackerras <> | Subject | Re: [tip:perfcounters/core] perf stat: handle Ctrl-C |
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tip-bot for Ingo Molnar writes:
> perf stat: handle Ctrl-C > > Before this change, if a long-running perf stat workload was Ctrl-C-ed, > the utility exited without displaying statistics. > > After the change, the Ctrl-C gets propagated into the workload (and > causes its early exit there), but perf stat itself will still continue > to run and will display counter results. > > This is useful to run open-ended workloads, let them run for > a while, then Ctrl-C them to get the stats.
Unfortunately it means that if you do e.g.
$ while true; do perf stat something; done
it's impossible to kill the loop with ctrl-C. To fix this we need to make perf stat kill itself with the signal after printing the results, so bash sees the died-due-to-signal exit status and stops the loop.
Paul.
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