From: Pavel Dovgalyuk Date: Tue, 14 Feb 2017 07:15:10 +0000 (+0300) Subject: audio: make audio poll timer deterministic X-Git-Tag: v2.9.0-rc0~39^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1ffc266539d443f83d5eb487593be50ef496f09e;p=thirdparty%2Fqemu.git audio: make audio poll timer deterministic This patch changes resetting strategy of the audio polling timer. It does not change expiration time if the timer is already set. This patch is needed to make this timer deterministic and to use execution record/replay for audio devices. audio_reset_timer is used in the function audio_vm_change_state_handler. Therefore every time VM is stopped or restarted the timer will be reset to new timeout. Virtual clock does not proceed while VM is stopped. Therefore there is no need in resetting the timeout when VM restarts. v2: updated commit message v3: now using timer_mod_anticipate function (as suggested by Yurii Zubrytskyi) Signed-off-by: Pavel Dovgalyuk Message-id: 20170214071510.6112.76764.stgit@PASHA-ISP Signed-off-by: Gerd Hoffmann --- diff --git a/audio/audio.c b/audio/audio.c index 21f7b0b0e67..c8898d8422d 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -1113,7 +1113,7 @@ static int audio_is_timer_needed (void) static void audio_reset_timer (AudioState *s) { if (audio_is_timer_needed ()) { - timer_mod (s->ts, + timer_mod_anticipate_ns(s->ts, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + conf.period.ticks); } else {