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Set rtprio in virtio-snd (cras backend) worker

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to 10 (following other cros audio client)

BUG=b:199796992
TEST=Examine output of `ps -AT -eo rtprio,command` when the device
  is running

Change-Id: I1293c693e1bd699788d87d5bc085fd4fd281fff1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3159894
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Chih-Yang Hsia <paulhsia@chromium.org>
Commit-Queue: Woody Chow <woodychow@google.com>
This commit is contained in:
Woody Chow 2021-09-15 16:26:41 +09:00 committed by Commit Bot
parent 44292f58f3
commit f5183c26be
4 changed files with 17 additions and 0 deletions
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8
devices/src/virtio/snd/cras_backend/mod.rs
View file

@ -17,6 +17,7 @@ use data_model::DataInit;
use futures::channel::mpsc;
use futures::{pin_mut, Future, TryFutureExt};
use libcras::{BoxError, CrasClient, CrasClientType, CrasSocketType};
use sys_util::{set_rt_prio_limit, set_rt_round_robin};
use thiserror::Error as ThisError;
use vm_memory::GuestMemory;
@ -33,6 +34,7 @@ use crate::virtio::snd::cras_backend::async_funcs::*;
// control + event + tx + rx queue
const NUM_QUEUES: usize = 4;
const QUEUE_SIZE: u16 = 1024;
const AUDIO_THREAD_RTPRIO: u16 = 10; // Matches other cros audio clients.
#[derive(ThisError, Debug)]
pub enum Error {
@ -544,6 +546,12 @@ impl VirtioDevice for VirtioSndCras {
let worker_result = thread::Builder::new()
.name("virtio_snd w".to_string())
.spawn(move || {
if let Err(e) = set_rt_prio_limit(u64::from(AUDIO_THREAD_RTPRIO))
.and_then(|_| set_rt_round_robin(i32::from(AUDIO_THREAD_RTPRIO)))
{
warn!("Failed to set audio thread to real time: {}", e);
}
let mut streams: Vec<AsyncMutex<StreamInfo>> = Vec::new();
streams.resize_with(pcm_info.len(), Default::default);

3
seccomp/aarch64/cras_snd_device.policy
View file

@ -9,3 +9,6 @@ socket: arg0 == AF_UNIX
socketpair: arg0 == AF_UNIX
prctl: arg0 == PR_SET_NAME
connect: 1
prlimit64: 1
setrlimit: 1
sched_setscheduler: 1

3
seccomp/arm/cras_snd_device.policy
View file

@ -10,3 +10,6 @@ socket: arg0 == AF_UNIX
socketpair: arg0 == AF_UNIX
prctl: arg0 == PR_SET_NAME
connect: 1
prlimit64: 1
setrlimit: 1
sched_setscheduler: 1

3
seccomp/x86_64/cras_snd_device.policy
View file

@ -10,3 +10,6 @@ socket: arg0 == AF_UNIX
socketpair: arg0 == AF_UNIX
prctl: arg0 == PR_SET_NAME
connect: 1
prlimit64: 1
setrlimit: 1
sched_setscheduler: 1