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perf util: Save pid-cmdline mapping into tracing header

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Current trace info data lacks the saved cmdline mapping which is needed
for pevent to find out the comm of a task.  Add this and bump up the
version number so that perf can determine its presence when reading.

This is mostly corresponding to trace.dat file version 6, but still
lacks 4 byte of number of cpus, and 10 bytes of type string - and I
think we don't need those anyway.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jeremy Eder <jeder@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>,
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
[ Change version test from == to >= ]
Link: http://lkml.kernel.org/n/tip-vaooqpxsikxbb3359p0corcb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2013-04-11 17:25:04 +09:00
committed by Arnaldo Carvalho de Melo
parent 0a87e7bc6c
commit cd4ceb6343
4 changed files with 84 additions and 3 deletions
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17
tools/perf/util/trace-event-parse.c
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@@ -160,6 +160,23 @@ void parse_ftrace_printk(struct pevent *pevent,
}
}
void parse_saved_cmdline(struct pevent *pevent,
char *file, unsigned int size __maybe_unused)
{
char *comm;
char *line;
char *next = NULL;
int pid;
line = strtok_r(file, "\n", &next);
while (line) {
sscanf(line, "%d %ms", &pid, &comm);
pevent_register_comm(pevent, comm, pid);
free(comm);
line = strtok_r(NULL, "\n", &next);
}
}
int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
{
return pevent_parse_event(pevent, buf, size, "ftrace");