diff options
| author | Peter Lieven <pl@kamp.de> | 2015-10-30 12:10:11 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2015-11-05 09:09:31 +0100 |
| commit | c3d6899c5e67dfd7ff195eccc10541f3b7e141a7 (patch) | |
| tree | a1564cd0a9d2f84534015461af4ec32e43d3a0ab /ui | |
| parent | 2e0c90af0a33451498d333d72c06e5429c7cd168 (diff) | |
| download | qemu-c3d6899c5e67dfd7ff195eccc10541f3b7e141a7.zip qemu-c3d6899c5e67dfd7ff195eccc10541f3b7e141a7.tar.gz qemu-c3d6899c5e67dfd7ff195eccc10541f3b7e141a7.tar.bz2 | |
vnc: recycle empty vs->output buffer
If the vs->output buffer is empty it will be dropped
by the next qio_buffer_move_empty in vnc_jobs_consume_buffer
anyway. So reuse the allocated buffer from this buffer
in the worker thread where we otherwise would start with
an empty (unallocated buffer).
Signed-off-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1446203414-4013-17-git-send-email-kraxel@redhat.com
[ added a comment describing the non-obvious optimization ]
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'ui')
| -rw-r--r-- | ui/vnc-jobs.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/ui/vnc-jobs.c b/ui/vnc-jobs.c index 12389cc..08f0163 100644 --- a/ui/vnc-jobs.c +++ b/ui/vnc-jobs.c @@ -235,6 +235,14 @@ static int vnc_worker_thread_loop(VncJobQueue *queue) vnc_unlock_output(job->vs); goto disconnected; } + if (buffer_empty(&job->vs->output)) { + /* + * Looks like a NOP as it obviously moves no data. But it + * moves the empty buffer, so we don't have to malloc a new + * one for vs.output + */ + buffer_move_empty(&vs.output, &job->vs->output); + } vnc_unlock_output(job->vs); /* Make a local copy of vs and switch output buffers */ |