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perf db-export: Also export thread's current comm

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Currently, the initial comm of the main thread is exported. Export also
a thread's current comm. That better supports the tracing of
multi-threaded applications that set different comms for different
threads to make it easier to distinguish them.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190710085810.1650-13-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2019-07-10 11:58:01 +03:00 committed by Arnaldo Carvalho de Melo
parent 80859c947a
commit 4650c7bed7
1 changed files with 8 additions and 0 deletions
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8
tools/perf/util/db-export.c
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@ -299,6 +299,7 @@ int db_export__sample(struct db_export *dbe, union perf_event *event,
}; };
struct thread *main_thread; struct thread *main_thread;
struct comm *comm = NULL; struct comm *comm = NULL;
struct comm *curr_comm;
int err; int err;
err = db_export__evsel(dbe, evsel); err = db_export__evsel(dbe, evsel);
@ -350,6 +351,13 @@ int db_export__sample(struct db_export *dbe, union perf_event *event,
} }
} }
curr_comm = thread__comm(thread);
if (curr_comm) {
err = db_export__comm(dbe, curr_comm, thread);
if (err)
goto out_put;
}
es.db_id = ++dbe->sample_last_db_id; es.db_id = ++dbe->sample_last_db_id;
err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset); err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);