From 1ee94463e9ac4721cfef27ffcd6f97ab026e3aac Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Mon, 11 Jul 2022 12:31:49 +0300 Subject: perf tools: Add perf_event__synthesize_id_sample() Add perf_event__synthesize_id_sample() to enable the synthesis of ID samples. This is needed by perf inject. When injecting events from a guest perf.data file, there is a possibility that the sample ID numbers conflict. In that case, perf_event__synthesize_id_sample() can be used to re-write the ID sample. Signed-off-by: Adrian Hunter Cc: Andi Kleen Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Cc: kvm@vger.kernel.org Link: https://lore.kernel.org/r/20220711093218.10967-7-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/synthetic-events.c | 47 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) (limited to 'tools/perf/util/synthetic-events.c') diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c index fe5db4bf0042..ed9623702f34 100644 --- a/tools/perf/util/synthetic-events.c +++ b/tools/perf/util/synthetic-events.c @@ -1712,6 +1712,53 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_fo return 0; } +int perf_event__synthesize_id_sample(__u64 *array, u64 type, const struct perf_sample *sample) +{ + __u64 *start = array; + + /* + * used for cross-endian analysis. See git commit 65014ab3 + * for why this goofiness is needed. + */ + union u64_swap u; + + if (type & PERF_SAMPLE_TID) { + u.val32[0] = sample->pid; + u.val32[1] = sample->tid; + *array = u.val64; + array++; + } + + if (type & PERF_SAMPLE_TIME) { + *array = sample->time; + array++; + } + + if (type & PERF_SAMPLE_ID) { + *array = sample->id; + array++; + } + + if (type & PERF_SAMPLE_STREAM_ID) { + *array = sample->stream_id; + array++; + } + + if (type & PERF_SAMPLE_CPU) { + u.val32[0] = sample->cpu; + u.val32[1] = 0; + *array = u.val64; + array++; + } + + if (type & PERF_SAMPLE_IDENTIFIER) { + *array = sample->id; + array++; + } + + return (void *)array - (void *)start; +} + int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process, struct evlist *evlist, struct machine *machine) { -- cgit v1.2.3