shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-03-25 12:00:22 +09:00
Code Issues Packages Projects Releases Wiki Activity

perf intel-pt: Fix CYC timestamps after standalone CBR

Browse Source 
commit 430635a0ef upstream.

After a standalone CBR (not associated with TSC), update the cycles
reference timestamp and reset the cycle count, so that CYC timestamps
are calculated relative to that point with the new frequency.

Fixes: cc33618619 ("perf tools: Add Intel PT support for decoding CYC packets")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230403154831.8651-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Adrian Hunter
2023-04-03 18:48:31 +03:00
committed by Greg Kroah-Hartman
parent 06106efa20
commit 6b84832966
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
View File

@@ -1859,6 +1859,8 @@ static void intel_pt_calc_cbr(struct intel_pt_decoder *decoder)
decoder->cbr = cbr;
decoder->cbr_cyc_to_tsc = decoder->max_non_turbo_ratio_fp / cbr;
decoder->cyc_ref_timestamp = decoder->timestamp;
decoder->cycle_cnt = 0;
intel_pt_mtc_cyc_cnt_cbr(decoder);
}