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perf tools: Add support for PERF_RECORD_AUX

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Add support for the PERF_RECORD_AUX event type.

PERF_RECORD_AUX is a new kernel event that records when new data lands
in the AUX buffer. Currently it is assumed that AUX data follows the
same ring buffer conventions used by the perf events buffer, and
consequently the AUX event is not processed during recording.

It is processed during session processing so that the information in the
'flags' member is made available.

The format of PERF_RECORD_AUX is outlined in the linux/perf_events.h
header file. The 'flags' are also enumerated.

Intel PT and Intel BTS use the flag named PERF_AUX_FLAG_TRUNCATED to
determine if data has been lost because the buffer became full as perf
was not able to empty it fast enough.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430404667-10593-7-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2015-04-30 17:37:29 +03:00 • committed by Arnaldo Carvalho de Melo
parent 53c76b0e9e
commit 4a96f7a02e
7 changed files with 63 additions and 0 deletions
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13
tools/perf/util/event.h
View file

@ -323,6 +323,13 @@ struct auxtrace_error_event {
char msg[MAX_AUXTRACE_ERROR_MSG];
};
struct aux_event {
struct perf_event_header header;
u64 aux_offset;
u64 aux_size;
u64 flags;
};
union perf_event {
struct perf_event_header header;
struct mmap_event mmap;
@ -341,6 +348,7 @@ union perf_event {
struct auxtrace_info_event auxtrace_info;
struct auxtrace_event auxtrace;
struct auxtrace_error_event auxtrace_error;
struct aux_event aux;
};
void perf_event__print_totals(void);
@ -376,6 +384,10 @@ int perf_event__process_lost(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine);
int perf_event__process_aux(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine);
int perf_event__process_mmap(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
@ -433,6 +445,7 @@ size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_task(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp);
size_t perf_event__fprintf(union perf_event *event, FILE *fp);
u64 kallsyms__get_function_start(const char *kallsyms_filename,