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| author | Adrian Hunter <adrian.hunter@intel.com> | 2022-07-11 11:31:53 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-07-20 16:07:58 +0200 |
| commit | b47bb18661eaed30790d70b7563a5220b3c59594 (patch) | |
| tree | 457ad457fa1a80154ebb02f1ff0e3806ae4a70a5 /tools/perf/util/synthetic-events.h | |
| parent | perf buildid-cache: Do not require purge files to also be in the file system (diff) | |
| download | linux-b47bb18661eaed30790d70b7563a5220b3c59594.tar.xz linux-b47bb18661eaed30790d70b7563a5220b3c59594.zip | |
perf tools: Add machine_pid and vcpu to id_index
When injecting events from a guest perf.data file, the events will have
separate sample ID numbers. These ID numbers can then be used to determine
which machine an event belongs to. To facilitate that, add machine_pid and
vcpu to id_index records. For backward compatibility, these are added at
the end of the record, and the length of the record is used to determine
if they are present or not.
Note, this is needed because the events from a guest perf.data file contain
the pid/tid of the process running at that time inside the VM not the
pid/tid of the (QEMU) hypervisor thread. So a way is needed to relate
guest events back to the guest machine and VCPU, and using sample ID
numbers for that is relatively simple and convenient.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: kvm@vger.kernel.org
Link: https://lore.kernel.org/r/20220711093218.10967-11-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/synthetic-events.h')
| -rw-r--r-- | tools/perf/util/synthetic-events.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/synthetic-events.h b/tools/perf/util/synthetic-events.h index b136ec3ec95d..81cb3d6af0b9 100644 --- a/tools/perf/util/synthetic-events.h +++ b/tools/perf/util/synthetic-events.h @@ -55,6 +55,7 @@ int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evs int perf_event__synthesize_extra_kmaps(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine); int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session, struct evlist *evlist, perf_event__handler_t process); int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process, struct evlist *evlist, struct machine *machine); +int __perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process, struct evlist *evlist, struct machine *machine, size_t from); int perf_event__synthesize_id_sample(__u64 *array, u64 type, const struct perf_sample *sample); int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine); int perf_event__synthesize_mmap_events(struct perf_tool *tool, union perf_event *event, pid_t pid, pid_t tgid, perf_event__handler_t process, struct machine *machine, bool mmap_data); |