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perf tools: Add a user event for AUX area tracing errors

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Errors encountered when decoding an AUX area trace need to be reported
to the user. However the "user" might be a script or another tool, so
provide a new user event to capture those errors.

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/1428594864-29309-8-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2015-04-09 18:53:47 +03:00 committed by Arnaldo Carvalho de Melo
parent e9db1310d9
commit e9bf54d25f
4 changed files with 44 additions and 1 deletions
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1
tools/perf/util/event.c
View File

@ -31,6 +31,7 @@ static const char *perf_event__names[] = {
[PERF_RECORD_ID_INDEX] = "ID_INDEX",
[PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
[PERF_RECORD_AUXTRACE] = "AUXTRACE",
[PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
};
const char *perf_event__name(unsigned int id)

16
tools/perf/util/event.h
View File

@ -217,6 +217,7 @@ enum perf_user_event_type { /* above any possible kernel type */
PERF_RECORD_ID_INDEX = 69,
PERF_RECORD_AUXTRACE_INFO = 70,
PERF_RECORD_AUXTRACE = 71,
PERF_RECORD_AUXTRACE_ERROR = 72,
PERF_RECORD_HEADER_MAX
};
@ -300,6 +301,20 @@ struct auxtrace_event {
u32 reserved__; /* For alignment */
};
#define MAX_AUXTRACE_ERROR_MSG 64
struct auxtrace_error_event {
struct perf_event_header header;
u32 type;
u32 code;
u32 cpu;
u32 pid;
u32 tid;
u32 reserved__; /* For alignment */
u64 ip;
char msg[MAX_AUXTRACE_ERROR_MSG];
};
union perf_event {
struct perf_event_header header;
struct mmap_event mmap;
@ -317,6 +332,7 @@ union perf_event {
struct id_index_event id_index;
struct auxtrace_info_event auxtrace_info;
struct auxtrace_event auxtrace;
struct auxtrace_error_event auxtrace_error;
};
void perf_event__print_totals(void);

25
tools/perf/util/session.c
View File

@ -296,6 +296,15 @@ static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
return event->auxtrace.size;
}
static
int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_session *session __maybe_unused)
{
dump_printf(": unhandled!\n");
return 0;
}
void perf_tool__fill_defaults(struct perf_tool *tool)
{
if (tool->sample == NULL)
@ -336,6 +345,8 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
tool->auxtrace_info = process_event_auxtrace_info_stub;
if (tool->auxtrace == NULL)
tool->auxtrace = process_event_auxtrace_stub;
if (tool->auxtrace_error == NULL)
tool->auxtrace_error = process_event_auxtrace_error_stub;
}
static void swap_sample_id_all(union perf_event *event, void *data)
@ -539,6 +550,17 @@ static void perf_event__auxtrace_swap(union perf_event *event,
event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
}
static void perf_event__auxtrace_error_swap(union perf_event *event,
bool sample_id_all __maybe_unused)
{
event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
}
typedef void (*perf_event__swap_op)(union perf_event *event,
bool sample_id_all);
@ -560,6 +582,7 @@ static perf_event__swap_op perf_event__swap_ops[] = {
[PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
[PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
[PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
[PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
[PERF_RECORD_HEADER_MAX] = NULL,
};
@ -1049,6 +1072,8 @@ static s64 perf_session__process_user_event(struct perf_session *session,
/* setup for reading amidst mmap */
lseek(fd, file_offset + event->header.size, SEEK_SET);
return tool->auxtrace(tool, event, session);
case PERF_RECORD_AUXTRACE_ERROR:
return tool->auxtrace_error(tool, event, session);
default:
return -EINVAL;
}

3
tools/perf/util/tool.h
View File

@ -50,7 +50,8 @@ struct perf_tool {
event_oe finished_round;
event_op2 build_id,
id_index,
auxtrace_info;
auxtrace_info,
auxtrace_error;
event_op3 auxtrace;
bool ordered_events;
bool ordering_requires_timestamps;