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| author | Sandipan Das <[email protected]> | 2022-08-11 17:59:53 +0530 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2022-08-27 00:05:43 +0200 |
| commit | 703fb765f48897214e3eb110f35dddec80682f60 (patch) | |
| tree | f23cd920b092433d819d3fa160d540cfd0129f18 /tools/perf/scripts/python/failed-syscalls-by-pid.py | |
| parent | 257449c6a50298bd21dcabd644f66a0296b78532 (diff) | |
perf/x86/amd/lbr: Detect LbrExtV2 support
AMD Last Branch Record Extension Version 2 (LbrExtV2) is driven by Core PMC
overflows. It records recently taken branches up to the moment when the PMC
overflow occurs.
Detect the feature during PMU initialization and set the branch stack depth
using CPUID leaf 0x80000022 EBX.
Signed-off-by: Sandipan Das <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lore.kernel.org/r/fc6e45378ada258f1bab79b0de6e05c393a8f1dd.1660211399.git.sandipan.das@amd.com
Diffstat (limited to 'tools/perf/scripts/python/failed-syscalls-by-pid.py')
0 files changed, 0 insertions, 0 deletions