* Arnaldo Carvalho de Melo <[email protected]> wrote:
> 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? [...]
Ubuntu, and the build says:
Auto-detecting system features:
... dwarf: [ on ]
... dwarf_getlocations: [ on ]
... glibc: [ on ]
... gtk2: [ on ]
... libaudit: [ on ]
... libbfd: [ on ]
... libelf: [ on ]
... libnuma: [ on ]
... numa_num_possible_cpus: [ on ]
... libperl: [ on ]
... libpython: [ on ]
... libslang: [ on ]
... libcrypto: [ on ]
... libunwind: [ on ]
... libdw-dwarf-unwind: [ on ]
... zlib: [ on ]
... lzma: [ on ]
... get_cpuid: [ on ]
... bpf: [ on ]
so it's a maximum-features build, right?
Here's the unwind libraries:
triton:~/tip> dpkg -l | grep unwind
ii libunwind-dev 1.1-4.1ubuntu2
amd64 library to determine the call-chain
of a program - development
ii libunwind8 1.1-4.1ubuntu2
amd64 library to determine the call-chain
of a program - runtime
ii libunwind8-dev 1.1-4.1ubuntu2
amd64 library to determine the call-chain
of a program - development
libunwind-dev is installed it appears.
Let me know if you want me to run other tests.
Thanks,
Ingo
