Em Wed, Jun 14, 2017 at 07:45:01AM +0200, Ingo Molnar escreveu: > triton:~/tip> perf report --stdio > unwind: target platform=x86 is not supported > unwind: target platform=x86 is not supported > unwind: target platform=x86 is not supported > unwind: target platform=x86 is not supported > unwind: target platform=x86 is not supported > unwind: target platform=x86 is not supported > unwind: target platform=x86 is not supported > unwind: target platform=x86 is not supported
> # ======== > # captured on: Wed Jun 14 07:34:42 2017 > # hostname : triton > # os release : 4.10.0-23-generic > # perf version : 4.12.rc5.g9688eb > # arch : x86_64 > # nrcpus online : 12 > # nrcpus avail : 12 > # cpudesc : Intel(R) Core(TM) i7-4960X CPU @ 3.60GHz > # cpuid : GenuineIntel,6,62,4 > # total memory : 65917012 kB > # cmdline : /home/mingo/bin/perf record /home/mingo/hackbench 10 > let me know if you need more info. > > Btw., note that there's also this warning: > > unwind: target platform=x86 is not supported > > (but that's unrelated to this commit.) Ok, what distro? Do you have libunwind-devel installed? I couldn't reproduce this one here with/without it installed, to test I build it with: make ARCH=x86_64 O=/tmp/build/perf -C tools/perf install-bin and without that ARCH= setting, then I record with: perf record --call-graph dwarf -a sleep 2 and try what you said emitted that warning: perf report --stdio - Arnaldo
