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| author | Denis V. Lunev | 2017-07-25 16:39:23 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi | 2017-08-01 13:13:07 +0200 |
| commit | bd6952a391b6f2083d6597386f457f30044e32a3 (patch) | |
| tree | ce8ca13de13a97932e62489c79a949955ef1bb51 /include/exec/user | |
| parent | trace-events: fix code style: print 0x before hex numbers (diff) | |
| download | qemu-bd6952a391b6f2083d6597386f457f30044e32a3.tar.gz qemu-bd6952a391b6f2083d6597386f457f30044e32a3.tar.xz qemu-bd6952a391b6f2083d6597386f457f30044e32a3.zip | |
monitor: Reduce handle_qmp_command() tracing overhead
We are malloc'ing a QString and spending CPU cycles on converting a
QObject to string, just for the sake of sticking the string in the trace
message. Wasted when we aren't tracing. Avoid that.
[Commit message and description suggested by Markus Armbruster to
provide more detail about the rationale for this patch.
Use trace_event_get_state_backends() instead of trace_event_get_state()
to honor DTrace/UST backend dstates.
--Stefan]
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20170725143923.11241-1-den@openvz.org
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Lluís Vilanova <vilanova@ac.upc.edu>
CC: Dr. David Alan Gilbert <dgilbert@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include/exec/user')
0 files changed, 0 insertions, 0 deletions