From de1109741da0510f4406ab89f64df2fdf8f5d325 Mon Sep 17 00:00:00 2001 From: Yu-Hsuan Hsu Date: Fri, 5 Jun 2026 16:47:35 +0000 Subject: [PATCH] ASoC: SOF: Use high-priority workqueue for PCM period elapsed The snd_sof_pcm_period_elapsed function currently schedules work on the system-wide workqueue. This can lead to potential delays or jitter in audio processing if the system workqueue is busy with other tasks. To improve real-time performance and ensure timely processing of PCM periods, we can use the system_highpri_wq instead of the default work queue. In performance testing, this change significantly reduced the observed scheduling delays. For instance, under load(stressapptest -M 15000 -m 60), the maximum delay dropped from 9ms on the system workqueue to 5ms on the dedicated high-priority workqueue. --- sound/soc/sof/pcm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c index b2071edeaea62e..f748d072109aa6 100644 --- a/sound/soc/sof/pcm.c +++ b/sound/soc/sof/pcm.c @@ -62,7 +62,7 @@ void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream) * To avoid sending IPC before the previous IPC is handled, we * schedule delayed work here to call the snd_pcm_period_elapsed(). */ - schedule_work(&spcm->stream[substream->stream].period_elapsed_work); + queue_work(system_highpri_wq, &spcm->stream[substream->stream].period_elapsed_work); } EXPORT_SYMBOL(snd_sof_pcm_period_elapsed);