From: Takashi Iwai <tiwai@suse.de>
To: Jaroslav Kysela <perex@suse.cz>
Cc: ALSA development <alsa-devel@alsa-project.org>
Subject: Re: RFC: Add support for monotonic clock for 2.6
Date: Wed, 07 Mar 2007 23:18:49 +0100 [thread overview]
Message-ID: <s5hirdcbsty.wl%tiwai@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.61.0702271533590.9439@tm8103-a.perex-int.cz>
At Tue, 27 Feb 2007 15:52:41 +0100 (CET),
Jaroslav Kysela wrote:
>
> Hi,
>
> in 2.6 kernels, we can use ktime_get_ts() function to get
> monotonic time which can be used for PCM timestamps. I would propose to
> reuse the SNDRV_PCM_IOCTL_TSTAMP ioctl to enable using of monotonic clock.
> The "enable" (int) argument might mean:
>
> 0: standard clock - getnstimeofday()
> 1: standard clock - getnstimeofday() - for "compatibility"
> 2: monotonic clock - ktime_get_ts()
Good to add a new feature... but is there any user of this PCM
timestamp so far? I see some good purposes but rarely seen in the
reality, unfortunately...
Takashi
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next prev parent reply other threads:[~2007-03-07 22:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-27 14:52 RFC: Add support for monotonic clock for 2.6 Jaroslav Kysela
2007-03-07 22:18 ` Takashi Iwai [this message]
2007-03-07 22:33 ` James Courtier-Dutton
2007-03-07 22:48 ` Takashi Iwai
2007-03-07 23:03 ` James Courtier-Dutton
2007-03-08 7:01 ` Jaroslav Kysela
2007-03-08 6:57 ` Jaroslav Kysela
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