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| author | Dapeng Mi <dapeng1.mi@linux.intel.com> | 2026-08-24 16:27:22 +0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-09-02 13:10:44 +0200 |
| commit | b76210d3214730fd5d79387684ae0c56dd580229 (patch) | |
| tree | 5ecd9926e030357c14d848200094c4eb8dc7266c /tools/perf/scripts/python | |
| parent | e9d76ada769c45e5363306d22cb10b323f6dc4b5 (diff) | |
perf/x86: Support YMM sampling using sample_simd_vec_reg_* fields
Support sampling of YMM registers via the sample_simd_vec_reg_* fields.
Each YMM register consists of 4 u64 words, assembled from two halves:
XMM (the lower 2 u64 words) and YMMH (the upper 2 u64 words). Although
both XMM and YMMH data can be retrieved with a single xsaves instruction,
they are stored in separate locations. The perf_simd_reg_value() function
is responsible for assembling these halves into a complete YMM register
for output to userspace.
Additionally, sample_simd_vec_reg_qwords should be set to 4 to indicate
YMM sampling.
YMM sampling will be enabled in a subsequent patch that sets
PERF_PMU_CAP_SIMD_REGS.
Co-developed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260824082731.1013973-15-dapeng1.mi@linux.intel.com
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions