From: Pavel Hofman <pavel.hofman@ivitera.com>
To: Clemens Ladisch <clemens@ladisch.de>
Cc: ALSA development <alsa-devel@alsa-project.org>
Subject: Re: Period time/size in adaptive USB - alignment to nrpacks?
Date: Sun, 01 Jan 2012 18:01:16 +0100 [thread overview]
Message-ID: <4F00915C.7070100@ivitera.com> (raw)
In-Reply-To: <16ced9db-de9c-476b-bb3c-7af436aab558@email.android.com>
On 29.12.2011 09:43, Clemens Ladisch wrote:
> Pavel Hofman wrote:
>> Now please see the wireshark screenshot at
>> http://personal.educity.cz/dustin/wireshark.png . Frame 1197 is the last
>> URB of the period, with 960 bytes only. Yet the time distance around it
>> is again 8 ms (12.808-12.816-12.824). The expected 5 ms lag appears 2
>> URBs later, between frames 1201 and 1203 (12.832-12.837), all holding
>> 1536 bytes.
>
> Wireshark shows the URBs when they are submitted, which
> is in the completion handler of some previous URB.
> This means that the timing of the submission has no
> relation with its size.
Hi Clemens, thanks a lot for the clarification. Everything seems to be
all right and verified :-)
Best regards,
Pavel.
prev parent reply other threads:[~2012-01-01 17:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-26 20:07 Period time/size in adaptive USB - alignment to nrpacks? Pavel Hofman
2011-12-28 13:00 ` Clemens Ladisch
2011-12-28 20:04 ` Pavel Hofman
2011-12-29 8:43 ` Clemens Ladisch
2012-01-01 17:01 ` Pavel Hofman [this message]
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