RE: [PATCH V6 13/17] perf, x86: enable LBR callstack when recording callchain

2014-10-24 Thread Liang, Kan
> > On Sun, Oct 19, 2014 at 05:55:08PM -0400, Kan Liang wrote: > > Only enable LBR callstack when user requires fp callgraph. The feature > > is not available when PERF_SAMPLE_BRANCH_STACK or > > PERF_SAMPLE_STACK_USER is required. > > Also, this feature only affects how to get user callchain.

Re: [PATCH V6 13/17] perf, x86: enable LBR callstack when recording callchain

2014-10-24 Thread Jiri Olsa
On Sun, Oct 19, 2014 at 05:55:08PM -0400, Kan Liang wrote: > Only enable LBR callstack when user requires fp callgraph. The feature > is not available when PERF_SAMPLE_BRANCH_STACK or PERF_SAMPLE_STACK_USER > is required. > Also, this feature only affects how to get user callchain. The kernel >

Re: [PATCH V6 13/17] perf, x86: enable LBR callstack when recording callchain

2014-10-24 Thread Jiri Olsa
On Sun, Oct 19, 2014 at 05:55:08PM -0400, Kan Liang wrote: Only enable LBR callstack when user requires fp callgraph. The feature is not available when PERF_SAMPLE_BRANCH_STACK or PERF_SAMPLE_STACK_USER is required. Also, this feature only affects how to get user callchain. The kernel

RE: [PATCH V6 13/17] perf, x86: enable LBR callstack when recording callchain

2014-10-24 Thread Liang, Kan
On Sun, Oct 19, 2014 at 05:55:08PM -0400, Kan Liang wrote: Only enable LBR callstack when user requires fp callgraph. The feature is not available when PERF_SAMPLE_BRANCH_STACK or PERF_SAMPLE_STACK_USER is required. Also, this feature only affects how to get user callchain. The kernel