From: Daniel Mack <zonque@gmail.com>
To: Clemens Ladisch <clemens@ladisch.de>
Cc: tiwai@suse.de, blablack@gmail.com, alsa-devel@alsa-project.org,
gdiffey@gmail.com, linuxaudio@showlabor.de
Subject: Re: [PATCH 1/5] ALSA: snd-usb: implement new endpoint streaming model
Date: Thu, 03 Nov 2011 16:21:42 +0100 [thread overview]
Message-ID: <4EB2B186.60405@gmail.com> (raw)
In-Reply-To: <4EB1669E.5040701@ladisch.de>
On 11/02/2011 04:49 PM, Clemens Ladisch wrote:
> Example with queue length = 2:
>
> 1) startup:
> driver queues both capture URBs
> 2) 1st capture URB completes:
> driver queues 1st playback URB and requeues 1st capture URB
> 3) 2nd capture URB completes:
> driver queues 2nd playback URB and requeues 2nd capture URB
> (all URBs are now queued)
> 4) 1st capture URB completes:
> 1st playback URB is still busy
> (The playback URB might have been scheduled for a later frame, and
> even for the same frame, there is no guarantee that the completions
> for different endpoints happen in the same order as the queueing.)
I see. However, this really never happened in my tests so far. What
would be a way to fix this? Queue less capture urbs than available slots
for playback urbs?
Daniel
next prev parent reply other threads:[~2011-11-03 15:21 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-31 12:10 [PATCH 0/5] RFC for snd-usb: rework usb endpoint logic Daniel Mack
2011-10-31 12:10 ` [PATCH 1/5] ALSA: snd-usb: implement new endpoint streaming model Daniel Mack
2011-11-01 20:57 ` Clemens Ladisch
2011-11-02 8:36 ` Daniel Mack
2011-11-02 10:26 ` Clemens Ladisch
2011-11-02 14:29 ` Daniel Mack
2011-11-02 15:49 ` Clemens Ladisch
2011-11-03 15:21 ` Daniel Mack [this message]
2011-11-03 16:42 ` Clemens Ladisch
2011-10-31 12:10 ` [PATCH 2/5] ALSA: snd-usb: switch over to new endpoint streaming logic Daniel Mack
2011-11-01 20:57 ` Clemens Ladisch
2011-11-02 15:58 ` Takashi Iwai
2011-11-02 16:18 ` Clemens Ladisch
2011-11-02 16:18 ` Takashi Iwai
2011-11-02 22:01 ` Torsten Schenk
2011-11-18 14:44 ` Daniel Mack
2011-11-18 14:41 ` Daniel Mack
2011-10-31 12:10 ` [PATCH 3/5] ALSA: snd-usb: remove old " Daniel Mack
2011-10-31 12:10 ` [PATCH 4/5] ALSA: snd-usb: set MAX_URBS to 16 Daniel Mack
2011-11-01 20:57 ` Clemens Ladisch
2011-10-31 12:10 ` [PATCH 5/5] ALSA: snd-usb: add support for implicit feedback Daniel Mack
2011-10-31 12:38 ` [PATCH 0/5] RFC for snd-usb: rework usb endpoint logic Daniel Mack
2011-11-01 8:50 ` Aurélien Leblond
2011-11-01 9:15 ` Daniel Mack
2011-11-01 9:40 ` Felix Homann
2011-11-01 10:25 ` Daniel Mack
2011-11-01 10:39 ` Felix Homann
2011-11-01 12:11 ` Daniel Mack
2011-11-01 13:59 ` Grant Diffey
2011-11-01 15:36 ` Takashi Iwai
2011-11-01 16:19 ` Takashi Iwai
2011-11-01 19:03 ` Felix Homann
2011-11-02 6:49 ` Takashi Iwai
2011-11-02 8:27 ` Daniel Mack
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4EB2B186.60405@gmail.com \
--to=zonque@gmail.com \
--cc=alsa-devel@alsa-project.org \
--cc=blablack@gmail.com \
--cc=clemens@ladisch.de \
--cc=gdiffey@gmail.com \
--cc=linuxaudio@showlabor.de \
--cc=tiwai@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).