From: Clemens Ladisch <clemens@ladisch.de>
To: David Henningsson <david.henningsson@canonical.com>,
"alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
Cc: Takashi Iwai <tiwai@suse.de>,
Lars-Peter Clausen <lars@metafoo.de>,
General PulseAudio Discussion
<pulseaudio-discuss@lists.freedesktop.org>
Subject: Re: SNDRV_PCM_INFO_BATCH
Date: Tue, 04 Mar 2014 15:50:04 +0100 [thread overview]
Message-ID: <5315E81C.2010704@ladisch.de> (raw)
In-Reply-To: <5315E118.7060809@canonical.com>
David Henningsson wrote:
> So, PulseAudio removed timer scheduling for drivers with
> SNDRV_PCM_INFO_BATCH, and released 5.0. Meanwhile, USB drivers still
> have SNDRV_PCM_INFO_BATCH, so this leads to performance regressions for
> USB sound cards.
>
> The question remains - what does SNDRV_PCM_INFO_BATCH really mean?
For your purposes, it means that the pointer accuracy is likely to be
worse than that of other sound cards.
There should be a mechanism to report the actual granularity.
Regards,
Clemens
prev parent reply other threads:[~2014-03-04 14:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-04 14:20 SNDRV_PCM_INFO_BATCH David Henningsson
2014-03-04 14:34 ` SNDRV_PCM_INFO_BATCH Takashi Iwai
2014-03-04 14:50 ` Clemens Ladisch [this message]
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