On Mon, Oct 27, 2014 at 09:26:39AM -0500, Derek Foreman wrote:
> Log a message when the kernel event queue overflows and events are dropped.
> After 10 messages logging stops to avoid flooding the logs if the condition
> is persistent.
> ---
> src/evdev.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/src/evdev.c b/src/evdev.c
> index 1b4ce10..c786537 100644
> --- a/src/evdev.c
> +++ b/src/evdev.c
> @@ -912,6 +912,7 @@ evdev_sync_device(struct evdev_device *device)
> static void
> evdev_device_dispatch(void *data)
> {
> + static int overflows = 0;
Does libinput allow static variables? Usually when there's a library
context, it should be possible to use the library from multiple threads,
if they use different contexts.
So maybe this counter should be inside `device` instead of static?
Ran
> struct evdev_device *device = data;
> struct libinput *libinput = device->base.seat->libinput;
> struct input_event ev;
> @@ -924,6 +925,15 @@ evdev_device_dispatch(void *data)
> rc = libevdev_next_event(device->evdev,
> LIBEVDEV_READ_FLAG_NORMAL, &ev);
> if (rc == LIBEVDEV_READ_STATUS_SYNC) {
> + if (overflows < 10) {
> + overflows++;
> + log_info(libinput, "Kernel evdev event queue "
> + "overflow for %s\n", device->devname);
> + if (overflows == 10)
> + log_info(libinput, "No longer logging "
> + "evdev event queue
> overflows\n");
> + }
> +
> /* send one more sync event so we handle all
> currently pending events before we sync up
> to the current state */
> --
> 2.1.1
>
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