Messages in this thread | | | Date | Thu, 06 Aug 2009 18:59:46 +0200 | From | Brice Goglin <> | Subject | Re: [perf] howto switch from pfmon |
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Ingo Molnar wrote: > Update: based on your feedback the latest perfcounters tree includes > the following new perf record features: > > -s, --stat per thread counts > -n, --no-samples don't sample > > --stat instructs the kernel to gather precise per task/thread stats > and emits those counts to the data file. Via --no-samples one can do > non-profiling runs - i.e. only statistics collection. > > The 'perf stat' pretty printing side is not fully implemented yet - > right now you can only see these stats if you look for > PERF_EVENT_READ counts in the raw event log: > > perf report -D | grep PERF_EVENT_READ >
Ok I am getting remote/local accesses for my threads now. But I am not sure which line corresponds to which event.
$ /mnt/scratch/bgoglin/cpunode/linux-2.6.31/tools/perf/perf record -f -s -e r1000001e0 -e r1000002e0 -e r1000004e0 -e r1000008e0 ./stream [...] $ /mnt/scratch/bgoglin/cpunode/linux-2.6.31/tools/perf/perf report -D | grep PERF_EVENT_READ 0x7cd0 [0x30]: PERF_EVENT_READ: 4651 4651 210827 0x7388 [0x30]: PERF_EVENT_READ: 4651 4651 241742 0x8cf0 [0x30]: PERF_EVENT_READ: 4651 4651 315938 0x9da0 [0x30]: PERF_EVENT_READ: 4651 4651 9461794 0x7208 [0x30]: PERF_EVENT_READ: 4651 4652 24954 0x8c90 [0x30]: PERF_EVENT_READ: 4651 4652 408056 0x7ca0 [0x30]: PERF_EVENT_READ: 4651 4652 8962423 0x9ce0 [0x30]: PERF_EVENT_READ: 4651 4652 9117 0x7df0 [0x30]: PERF_EVENT_READ: 4651 4653 21645 0x9d70 [0x30]: PERF_EVENT_READ: 4651 4653 23606 0x7358 [0x30]: PERF_EVENT_READ: 4651 4653 29266 0x8e70 [0x30]: PERF_EVENT_READ: 4651 4653 9339173 [...]
I can easily sort them by thread id, but I don't know how to match my 4 events with each group of 4 line.
Maybe perf report earned some better way to show per-thread statistics in the meantime?
Brice
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