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authorMarkus Metzger <markus.t.metzger@intel.com>2009-07-21 15:56:48 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-09 13:04:14 +0200
commit30dd568c912602b7dbd609a45d053e01b13422bb (patch)
tree96e970d91b3ef06301ca0f03bc4b1a0068b06122 /tools/perf/Documentation
parent183f3b0887083d36c8a25cd5e3518906415d1889 (diff)
x86, perf_counter, bts: Add BTS support to perfcounters
Implement a performance counter with: attr.type = PERF_TYPE_HARDWARE attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS attr.sample_period = 1 Using branch trace store (BTS) on x86 hardware, if available. The from and to address for each branch can be sampled using: PERF_SAMPLE_IP for the from address PERF_SAMPLE_ADDR for the to address [ v2: address review feedback, fix bugs ] Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/Documentation')
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