From: Arnaldo Carvalho de Melo <[email protected]> We forgot to update the perf.data file format document for the HEADER_CLOCKID header, do it now from comments in the patch introducing it.
Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Alexey Budankov <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Chong Jiang <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Simon Que <[email protected]> Fixes: cf7905165fee ("perf record: Encode -k clockid frequency into Perf trace") Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/Documentation/perf.data-file-format.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/perf/Documentation/perf.data-file-format.txt b/tools/perf/Documentation/perf.data-file-format.txt index 99733751695b..600999f89c6d 100644 --- a/tools/perf/Documentation/perf.data-file-format.txt +++ b/tools/perf/Documentation/perf.data-file-format.txt @@ -296,6 +296,12 @@ $ perf report --header-only -I # memory nodes (nr 1, block size 0x8000000): # 0 [7G]: 0-23,32-69 + HEADER_CLOCKID = 23, + +One uint64_t for the clockid frequency, specified, for instance, via 'perf +record -k' (see clock_gettime()), to enable timestamps derived metrics +conversion into wall clock time on the reporting stage. + HEADER_BPF_PROG_INFO = 25, struct bpf_prog_info_linear, which contains detailed information about -- 2.20.1
