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| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2015-01-20 09:41:15 +0000 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2015-02-06 10:27:22 +0000 |
| commit | dd9fe29c80b8a35f12d98928a97be3aded80cf69 (patch) | |
| tree | 1dd36451cb2c4f425607b6472626c4376f79a6d0 /scripts/tracetool/backend | |
| parent | 16017c48547960539fcadb1f91d252124f442482 (diff) | |
| download | focaccia-qemu-dd9fe29c80b8a35f12d98928a97be3aded80cf69.tar.gz focaccia-qemu-dd9fe29c80b8a35f12d98928a97be3aded80cf69.zip | |
trace: Print PID and time in stderr traces
When debugging migration it's useful to know the PID of each trace message so you can figure out if it came from the source or the destination. Printing the time makes it easy to do latency measurements or timings between trace points. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-id: 1421746875-9962-1-git-send-email-dgilbert@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'scripts/tracetool/backend')
| -rw-r--r-- | scripts/tracetool/backend/stderr.py | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/scripts/tracetool/backend/stderr.py b/scripts/tracetool/backend/stderr.py index 2a1e9064c3..ca58054621 100644 --- a/scripts/tracetool/backend/stderr.py +++ b/scripts/tracetool/backend/stderr.py @@ -21,6 +21,9 @@ PUBLIC = True def generate_h_begin(events): out('#include <stdio.h>', + '#include <sys/time.h>', + '#include <sys/types.h>', + '#include <unistd.h>', '#include "trace/control.h"', '') @@ -31,7 +34,12 @@ def generate_h(event): argnames = ", " + argnames out(' if (trace_event_get_state(%(event_id)s)) {', - ' fprintf(stderr, "%(name)s " %(fmt)s "\\n" %(argnames)s);', + ' struct timeval _now;', + ' gettimeofday(&_now, NULL);', + ' fprintf(stderr, "%%d@%%zd.%%06zd:%(name)s " %(fmt)s "\\n",', + ' getpid(),', + ' (size_t)_now.tv_sec, (size_t)_now.tv_usec', + ' %(argnames)s);', ' }', event_id="TRACE_" + event.name.upper(), name=event.name, |