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authorYan, Zheng <[email protected]>2014-11-04 21:55:57 -0500
committerIngo Molnar <[email protected]>2015-02-18 17:16:01 +0100
commit27ac905b8f88d28779b0661809286b5ba2817d37 (patch)
treefba88a53448a59d56df83895a087ebff5d032620 /scripts/gdb/linux/modules.py
parentc796b205b88c775fd220c1a63390bac6a8cdda3f (diff)
perf/x86/intel: Reduce lbr_sel_map[] size
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 <[email protected]> Signed-off-by: Kan Liang <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Reviewed-by: Stephane Eranian <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Vince Weaver <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'scripts/gdb/linux/modules.py')
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