Messages in this thread | | | Date | Fri, 16 Nov 2007 15:21:08 +0100 | From | Takashi Iwai <> | Subject | Re: [patch] snd hda suspend latency: shorten codec read |
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At Fri, 16 Nov 2007 13:58:24 +0100, Ingo Molnar wrote: > > > snd hda suspend latency goes down a second via the patch below. > > Ingo > > -------------> > Subject: snd hda suspend latency: shorten codec read > From: Ingo Molnar <mingo@elte.hu> > > not sleeping for every codec read/write but doing a short udelay and > a conditional reschedule has cut suspend+resume latency by about 1 > second on my T60. > > Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cute, I applied to ALSA tree now. Thanks!
Takashi
> --- > sound/pci/hda/hda_intel.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > Index: linux/sound/pci/hda/hda_intel.c > =================================================================== > --- linux.orig/sound/pci/hda/hda_intel.c > +++ linux/sound/pci/hda/hda_intel.c > @@ -555,7 +555,8 @@ static unsigned int azx_rirb_get_respons > } > if (!chip->rirb.cmds) > return chip->rirb.res; /* the last value */ > - schedule_timeout_uninterruptible(1); > + udelay(10); > + cond_resched(); > } while (time_after_eq(timeout, jiffies)); > > if (chip->msi) { > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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