From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>,
qemu-devel@nongnu.org
Cc: "Igor Skalkin" <Igor.Skalkin@opensynergy.com>,
"Anton Yakovlev" <Anton.Yakovlev@opensynergy.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"ichael S. Tsirkin" <mst@redhat.com>,
"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
"Daniel P. Berrangé" <berrange@redhat.com>,
"Eduardo Habkost" <eduardo@habkost.net>,
"Marc-Andr é Lureau" <marcandre.lureau@redhat.com>,
"Volker R ü melin" <vr_qemu@t-online.de>, "Kő vá gó ,
Zoltá n" <DirtY.iCE.hu@gmail.com>,
"Alex Benn é e" <alex.bennee@linaro.org>
Subject: Re: [PATCH v8 03/12] virtio-sound: handle control messages and streams
Date: Mon, 4 Sep 2023 12:42:50 +0200 [thread overview]
Message-ID: <ac6f80a3-129b-ccf9-b1a9-822a382938e0@linaro.org> (raw)
In-Reply-To: <0gi88.o687yqrpqd24@linaro.org>
On 4/9/23 12:18, Manos Pitsidianakis wrote:
> Good morning Philippe,
>
> On Mon, 04 Sep 2023 13:08, Philippe Mathieu-Daudé <philmd@linaro.org>
> wrote:
>>> + iov_from_buf(cmd->elem->in_sg,
>>> + cmd->elem->in_num,
>>> + 0,
>>> + &cmd->resp,
>>> + sizeof(cmd->resp));
>>> + virtqueue_push(cmd->vq, cmd->elem, sizeof(cmd->elem));
>>> + virtio_notify(VIRTIO_DEVICE(s), cmd->vq);
>>
>> I have very few understanding of virtio, but I'm wondering here,
>> since this function is called under cmdq_mutex(), could it be
>> useful to batch the queue by calling virtio_notify() only once
>> in the caller once the whole cmdq is processed ...
>
> In the linux driver (sound/virtio/virtio_ctl_msg.c), the guest has a
> timeout for receiving the message. I found that if I did not notify as
> fast as possible, I got timeout errors on the guest.
Ah, I see, 1ms per default:
sound/virtio/virtio_card.c:14:u32 virtsnd_msg_timeout_ms = MSEC_PER_SEC;
next prev parent reply other threads:[~2023-09-04 10:43 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-28 19:54 [PATCH v8 00/12] Add VIRTIO sound card Emmanouil Pitsidianakis
2023-08-28 19:54 ` [PATCH v8 01/12] Add virtio-sound device stub Emmanouil Pitsidianakis
2023-08-28 19:54 ` [PATCH v8 02/12] Add virtio-sound-pci device Emmanouil Pitsidianakis
2023-09-04 6:32 ` Volker Rümelin
2023-09-04 10:26 ` Manos Pitsidianakis
2023-09-04 21:08 ` Volker Rümelin
2023-09-06 9:05 ` Mark Cave-Ayland
2023-08-28 19:55 ` [PATCH v8 03/12] virtio-sound: handle control messages and streams Emmanouil Pitsidianakis
2023-09-04 10:08 ` Philippe Mathieu-Daudé
2023-09-04 10:18 ` Manos Pitsidianakis
2023-09-04 10:42 ` Philippe Mathieu-Daudé [this message]
2023-09-04 10:46 ` Philippe Mathieu-Daudé
2023-09-04 11:00 ` Manos Pitsidianakis
2023-09-04 11:30 ` Philippe Mathieu-Daudé
2023-09-04 11:46 ` Manos Pitsidianakis
2023-09-04 12:17 ` Philippe Mathieu-Daudé
2023-09-06 9:29 ` Mark Cave-Ayland
2023-08-28 19:55 ` [PATCH v8 04/12] virtio-sound: set PCM stream parameters Emmanouil Pitsidianakis
2023-08-29 19:27 ` Alex Bennée
2023-08-28 19:55 ` [PATCH v8 05/12] virtio-sound: handle VIRTIO_SND_R_PCM_INFO request Emmanouil Pitsidianakis
2023-08-29 19:31 ` Alex Bennée
2023-09-04 10:13 ` Philippe Mathieu-Daudé
2023-09-04 10:24 ` Manos Pitsidianakis
2023-08-28 19:55 ` [PATCH v8 06/12] virtio-sound: handle VIRTIO_SND_R_PCM_{START,STOP} Emmanouil Pitsidianakis
2023-08-29 19:32 ` Alex Bennée
2023-08-28 19:55 ` [PATCH v8 07/12] virtio-sound: handle VIRTIO_SND_R_PCM_SET_PARAMS Emmanouil Pitsidianakis
2023-08-29 19:33 ` Alex Bennée
2023-08-28 19:55 ` [PATCH v8 08/12] virtio-sound: handle VIRTIO_SND_R_PCM_PREPARE Emmanouil Pitsidianakis
2023-08-29 19:33 ` Alex Bennée
2023-08-28 19:55 ` [PATCH v8 09/12] virtio-sound: handle VIRTIO_SND_R_PCM_RELEASE Emmanouil Pitsidianakis
2023-08-29 19:34 ` Alex Bennée
2023-08-28 19:55 ` [PATCH v8 10/12] virtio-sound: implement audio output (TX) Emmanouil Pitsidianakis
2023-08-30 13:39 ` Alex Bennée
2023-09-04 10:26 ` Philippe Mathieu-Daudé
2023-09-04 10:34 ` Manos Pitsidianakis
2023-09-04 11:39 ` Philippe Mathieu-Daudé
2023-09-04 21:34 ` Volker Rümelin
2023-09-05 7:10 ` Volker Rümelin
2023-08-28 19:55 ` [PATCH v8 11/12] virtio-sound: implement audio capture (RX) Emmanouil Pitsidianakis
2023-08-30 13:40 ` Alex Bennée
2023-09-08 6:49 ` Volker Rümelin
2023-09-09 8:56 ` Volker Rümelin
2023-08-28 19:55 ` [PATCH v8 12/12] docs/system: add basic virtio-snd documentation Emmanouil Pitsidianakis
2023-08-30 17:49 ` Alex Bennée
2023-08-30 13:40 ` [PATCH v8 00/12] Add VIRTIO sound card Alex Bennée
2023-09-04 7:20 ` Volker Rümelin
2023-09-04 10:01 ` Manos Pitsidianakis
2023-09-04 12:11 ` Alex Bennée
2023-09-05 6:03 ` Volker Rümelin
2023-09-05 6:56 ` Volker Rümelin
2023-09-06 8:39 ` Matias Ezequiel Vara Larsen
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