diff options
| author | Ilia Mirkin <imirkin@alum.mit.edu> | 2020-08-15 23:20:53 -0400 |
|---|---|---|
| committer | Ilia Mirkin <imirkin@alum.mit.edu> | 2020-08-15 23:21:53 -0400 |
| commit | 5031100549fb053527a1f11d771e930dec065ced (patch) | |
| tree | 447d436ca7f33f7b184b2556f386c5a72083ef14 | |
| parent | f833cd0827a73b716cc3af5905015fcb2c7d958d (diff) | |
drmmode: make event handler leave a note that there are stuck events
We don't really expect to have too many events in the queue. If there
are, then the algorithm we use isn't appropriate. Add a warning when the
queue gets very long, as it's an indication of something having gone
wrong.
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
| -rw-r--r-- | src/drmmode_display.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/drmmode_display.c b/src/drmmode_display.c index 2d3229c..45292c4 100644 --- a/src/drmmode_display.c +++ b/src/drmmode_display.c @@ -159,6 +159,8 @@ drmmode_events = { .prev = &drmmode_events, }; +static bool warned = false; + static void drmmode_event_handler(int fd, unsigned int frame, unsigned int tv_sec, unsigned int tv_usec, void *event_data) @@ -166,7 +168,10 @@ drmmode_event_handler(int fd, unsigned int frame, unsigned int tv_sec, const uint64_t ust = (uint64_t)tv_sec * 1000000 + tv_usec; struct drmmode_event *e = event_data; + int counter = 0; + xorg_list_for_each_entry(e, &drmmode_events, head) { + counter++; if (e == event_data) { xorg_list_del(&e->head); e->func((void *)(e + 1), e->name, ust, frame); @@ -174,6 +179,12 @@ drmmode_event_handler(int fd, unsigned int frame, unsigned int tv_sec, break; } } + + if (counter > 100 && !warned) { + xf86DrvMsg(0, X_WARNING, + "Event handler iterated %d times\n", counter); + warned = true; + } } void |