[PATCH 3/4] soc: apple: rtkit: Use high prio work queue
Alyssa Rosenzweig
alyssa at rosenzweig.io
Mon Feb 24 10:10:14 PST 2025
Reviewed-by: Alyssa Rosenzweig <alyssa at rosenzweig.io>
Le Sat , Feb 22, 2025 at 04:56:48PM +0000, Sven Peter via B4 Relay a écrit :
> From: Janne Grunau <j at jannau.net>
>
> rtkit messages as communication with the DCP firmware for framebuffer
> swaps or input events are time critical so use WQ_HIGHPRI to prevent
> user space CPU load to increase latency.
> With kwin_wayland 6's explicit sync mode user space load was able to
> delay the IOMFB rtkit communication enough to miss vsync for surface
> swaps. Minimal test scenario is constantly resizing a glxgears
> Xwayland window.
>
> Signed-off-by: Janne Grunau <j at jannau.net>
> Signed-off-by: Sven Peter <sven at svenpeter.dev>
> ---
> drivers/soc/apple/rtkit.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c
> index 35734ae8c9ce..b7f4654c3341 100644
> --- a/drivers/soc/apple/rtkit.c
> +++ b/drivers/soc/apple/rtkit.c
> @@ -695,7 +695,7 @@ struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie,
> rtk->mbox->rx = apple_rtkit_rx;
> rtk->mbox->cookie = rtk;
>
> - rtk->wq = alloc_ordered_workqueue("rtkit-%s", WQ_MEM_RECLAIM,
> + rtk->wq = alloc_ordered_workqueue("rtkit-%s", WQ_HIGHPRI | WQ_MEM_RECLAIM,
> dev_name(rtk->dev));
> if (!rtk->wq) {
> ret = -ENOMEM;
>
> --
> 2.34.1
>
>
More information about the linux-arm-kernel
mailing list