perf trace: Add option to show process COMM - kernel/git/torvalds/linux.git (original) (raw)
Enabled by default, disable with --no-comm, e.g.: 181.821 (0.001 ms): deja-dup-monit/10784 recvmsg(fd: 8, msg: 0x7fff4342baf0, flags: PEEK|TRUNC|CMSG_CLOEXEC ) = 20 181.824 (0.001 ms): deja-dup-monit/10784 geteuid( ) = 1000 181.825 (0.001 ms): deja-dup-monit/10784 getegid( ) = 1000 181.834 (0.002 ms): deja-dup-monit/10784 recvmsg(fd: 8, msg: 0x7fff4342baf0, flags: CMSG_CLOEXEC ) = 20 181.836 (0.001 ms): deja-dup-monit/10784 geteuid( ) = 1000 181.838 (0.001 ms): deja-dup-monit/10784 getegid( ) = 1000 181.705 (0.003 ms): evolution-addr/10924 recvmsg(fd: 10, msg: 0x7fff17dc6990, flags: PEEK|TRUNC|CMSG_CLOEXEC) = 1256 181.710 (0.002 ms): evolution-addr/10924 geteuid( ) = 1000 181.712 (0.001 ms): evolution-addr/10924 getegid( ) = 1000 181.727 (0.003 ms): evolution-addr/10924 recvmsg(fd: 10, msg: 0x7fff17dc6990, flags: CMSG_CLOEXEC ) = 1256 181.731 (0.001 ms): evolution-addr/10924 geteuid( ) = 1000 181.734 (0.001 ms): evolution-addr/10924 getegid( ) = 1000 181.908 (0.002 ms): evolution-addr/10924 recvmsg(fd: 10, msg: 0x7fff17dc6990, flags: PEEK|TRUNC|CMSG_CLOEXEC) = 20 181.913 (0.001 ms): evolution-addr/10924 geteuid( ) = 1000 181.915 (0.001 ms): evolution-addr/10924 getegid( ) = 1000 181.930 (0.003 ms): evolution-addr/10924 recvmsg(fd: 10, msg: 0x7fff17dc6990, flags: CMSG_CLOEXEC ) = 20 181.934 (0.001 ms): evolution-addr/10924 geteuid( ) = 1000 181.937 (0.001 ms): evolution-addr/10924 getegid( ) = 1000 220.718 (0.010 ms): at-spi2-regist/10715 sendmsg(fd: 3, msg: 0x7fffdb8756c0, flags: NOSIGNAL ) = 200 220.741 (0.000 ms): dbus-daemon/10711 ... [continued]: epoll_wait()) = 1 220.759 (0.004 ms): dbus-daemon/10711 recvmsg(fd: 11, msg: 0x7ffff94594d0, flags: CMSG_CLOEXEC ) = 200 220.780 (0.002 ms): dbus-daemon/10711 recvmsg(fd: 11, msg: 0x7ffff94594d0, flags: CMSG_CLOEXEC ) = 200 220.788 (0.001 ms): dbus-daemon/10711 recvmsg(fd: 11, msg: 0x7ffff94594d0, flags: CMSG_CLOEXEC ) = -1 EAGAIN Resource temporarily unavailable 220.760 (0.004 ms): at-spi2-regist/10715 sendmsg(fd: 3, msg: 0x7fffdb8756c0, flags: NOSIGNAL ) = 200 220.771 (0.023 ms): perf/26347 open(filename: 0xf2e780, mode: 15918976 ) = 19 220.850 (0.002 ms): perf/26347 close(fd: 19 ) = 0 Cc: Adrian Hunter adrian.hunter@intel.com Cc: David Ahern dsahern@gmail.com Cc: Frederic Weisbecker fweisbec@gmail.com Cc: Jiri Olsa jolsa@redhat.com Cc: Mike Galbraith efault@gmx.de Cc: Paul Mackerras paulus@samba.org Cc: Peter Zijlstra peterz@infradead.org Cc: Stephane Eranian eranian@google.com Link: http://lkml.kernel.org/n/tip-6be5jvnkdzjptdrebfn5263n@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo acme@redhat.com
@@ -82,6 +82,9 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
--time
Print full timestamp rather time relative to first sample.
+--comm::
+ Show process COMM right beside its ID, on by default, disable with --no-comm.
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script[1]
@@ -726,6 +726,7 @@ struct trace {
struct intlist *pid_list;
bool sched;
bool multiple_threads;
+ bool show_comm;
double duration_filter;
double runtime_ms;
};
@@ -755,8 +756,11 @@ static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thre
size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
printed += fprintf_duration(duration, fp);
- if (trace->multiple_threads)
+ if (trace->multiple_threads) {
+ if (trace->show_comm)
+ printed += fprintf(fp, "%.14s/", thread->comm);
printed += fprintf(fp, "%d ", thread->tid);
+ }
return printed;
}
@@ -1503,10 +1507,13 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
.mmap_pages = 1024,
},
.output = stdout,
+ .show_comm = true,
};
const char *output_name = NULL;
const char *ev_qualifier_str = NULL;
const struct option trace_options[] = {
+ OPT_BOOLEAN(0, "comm", &trace.show_comm,
+ "show the thread COMM next to its id"),
OPT_STRING('e', "expr", &ev_qualifier_str, "expr",
"list of events to trace"),
OPT_STRING('o', "output", &output_name, "file", "output file name"),