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From: Oleksandr Grytsov <al1img@gmail.com>
To: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Cc: Oleksandr Andrushchenko <andr2000@gmail.com>,
	clemens@ladisch.de, alsa-devel@alsa-project.org,
	xen-devel@lists.xen.org, linux-kernel@vger.kernel.org,
	tiwai@suse.com,
	Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Subject: Re: [PATCH RESEND1 00/12] ALSA: vsnd: Add Xen para-virtualized frontend driver
Date: Wed, 23 Aug 2017 17:51:20 +0300	[thread overview]
Message-ID: <CACvf2oUJtxVTuV0qu4z4kV=aSOH5O_8v=UjH_3tr4wCJdXuEjw@mail.gmail.com> (raw)
In-Reply-To: <3f8e535b-8607-6b15-6e17-da755a06cc1e@sakamocchi.jp>

Hi,

Thank you for detailed explanation.

We understand that emulated interrupt on the frontend side is completely not
acceptable and definitely we need to provide some feedback mechanism from
Dom0 to DomU.

In our case it is technically impossible to provide precise period interrupt
(mostly because our backend is a user space application).
The best we can implement it is provide number of frames (time, bytes etc.)
consumed by real HW. This info will be outdated due to different delays but
we can provide precise timestamps when this info was acquired.

Would this info be useful to update the frontend driver state?

If you have in mind any other solution we would appreciate.

-- 
Best Regards,
Oleksandr Grytsov.

  reply	other threads:[~2017-08-23 14:51 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-07 12:22 [PATCH RESEND1 00/12] ALSA: vsnd: Add Xen para-virtualized frontend driver Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 01/12] ALSA: vsnd: Introduce Xen para-virtualized sound " Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 02/12] ALSA: vsnd: Implement driver's probe/remove Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 03/12] ALSA: vsnd: Implement Xen bus state handling Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 04/12] ALSA: vsnd: Read sound driver configuration from Xen store Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 05/12] ALSA: vsnd: Implement Xen event channel handling Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 06/12] ALSA: vsnd: Implement handling of shared buffers Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 07/12] ALSA: vsnd: Introduce ALSA virtual sound driver Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 08/12] ALSA: vsnd: Initialize virtul sound card Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 09/12] ALSA: vsnd: Add timer for period interrupt emulation Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 10/12] ALSA: vsnd: Implement ALSA PCM operations Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 11/12] ALSA: vsnd: Implement communication with backend Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 12/12] ALSA: vsnd: Introduce Kconfig option to enable Xen PV sound Oleksandr Andrushchenko
2017-08-10  3:14 ` [PATCH RESEND1 00/12] ALSA: vsnd: Add Xen para-virtualized frontend driver Takashi Sakamoto
2017-08-10  8:10   ` Oleksandr Andrushchenko
2017-08-17 10:05     ` [Xen-devel] " Oleksandr Grytsov
2017-08-18  5:43       ` Takashi Sakamoto
2017-08-18  5:56         ` Oleksandr Andrushchenko
2017-08-18  7:17           ` Takashi Sakamoto
2017-08-18  7:23             ` Oleksandr Andrushchenko
2017-08-22  2:43               ` Takashi Sakamoto
2017-08-23 14:51                 ` Oleksandr Grytsov [this message]
2017-08-24  4:38                   ` Takashi Sakamoto
2017-08-24  7:04                     ` Oleksandr Andrushchenko
2017-09-04  7:21                       ` Oleksandr Andrushchenko
2017-09-05  7:24                       ` [alsa-devel] " Clemens Ladisch
2017-09-12  7:52                         ` Oleksandr Grytsov
2017-09-19  8:57                           ` Oleksandr Andrushchenko
2017-09-26 11:35                             ` Oleksandr Andrushchenko
2017-10-04  6:50                               ` Oleksandr Andrushchenko
2017-10-13  6:15                                 ` Oleksandr Andrushchenko
2017-10-30  6:33                                   ` [RFC] " Oleksandr Andrushchenko
2017-11-02  9:44                                     ` Takashi Sakamoto
2017-11-02  9:55                                       ` Oleksandr Andrushchenko

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