Messages in this thread | | | Date | Fri, 24 Oct 2014 11:39:30 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH V6 01/17] perf, x86: Reduce lbr_sel_map size |
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On Sun, Oct 19, 2014 at 05:54:56PM -0400, Kan Liang wrote:
This should still very much have:
From: Yan, Zheng <zheng.z.yan@intel.com>
Seeing how you did not write this patch, probably true for all the others too, although I've not checked yet.
> The index of lbr_sel_map is bit value of perf branch_sample_type. > PERF_SAMPLE_BRANCH_MAX is 1024 at present, so each lbr_sel_map uses > 4096 bytes. By using bit shift as index, we can reduce lbr_sel_map > size to 40 bytes. This patch defines 'bit shift' for branch types, > and use 'bit shift' to define lbr_sel_maps. > > Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> > Signed-off-by: Kan Liang <kan.liang@intel.com> > Reviewed-by: Stephane Eranian <eranian@google.com> > ---
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