diff options
| author | Keith Packard <keithp@keithp.com> | 2009-08-25 18:07:00 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2009-08-25 18:14:19 -0700 |
| commit | e7dd1efef408effe52d0bd3d3aa0b5d4ee10ed90 (patch) | |
| tree | dccb4b61e30cf7d454a3492a5ceeb391292ad1f9 /dix | |
| parent | 1740cda7a37abc7d0a169ab4555b446adaa62211 (diff) | |
Ensure that rotation updates happen frequently
The smart scheduler is designed to minimize scheduler overhead by
increasing the interval between WaitForSomething calls when a single
client is running. However, the software rotation code depends on
its BlockHandler being invoked for screen updates; the long delays
caused by the smart scheduler optimizations means that screen updates
can be delayed a long time as well.
The change is simple -- prevent the smart scheduler from increasing
the scheduling interval while any screen is using software rotation.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'dix')
| -rw-r--r-- | dix/dispatch.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/dix/dispatch.c b/dix/dispatch.c index 31c69612b..414bd0404 100644 --- a/dix/dispatch.c +++ b/dix/dispatch.c @@ -242,6 +242,7 @@ long SmartScheduleSlice = SMART_SCHEDULE_DEFAULT_INTERVAL; long SmartScheduleInterval = SMART_SCHEDULE_DEFAULT_INTERVAL; long SmartScheduleMaxSlice = SMART_SCHEDULE_MAX_SLICE; long SmartScheduleTime; +int SmartScheduleLatencyLimited = 0; static ClientPtr SmartLastClient; static int SmartLastIndex[SMART_MAX_PRIORITY-SMART_MIN_PRIORITY+1]; @@ -312,7 +313,7 @@ SmartScheduleClient (int *clientReady, int nready) /* * Adjust slice */ - if (nready == 1) + if (nready == 1 && SmartScheduleLatencyLimited == 0) { /* * If it's been a long time since another client @@ -332,6 +333,23 @@ SmartScheduleClient (int *clientReady, int nready) return best; } +void +EnableLimitedSchedulingLatency(void) +{ + ++SmartScheduleLatencyLimited; + SmartScheduleSlice = SmartScheduleInterval; +} + +void +DisableLimitedSchedulingLatency(void) +{ + --SmartScheduleLatencyLimited; + + /* protect against bugs */ + if (SmartScheduleLatencyLimited < 0) + SmartScheduleLatencyLimited = 0; +} + #define MAJOROP ((xReq *)client->requestBuffer)->reqType void @@ -351,6 +369,7 @@ Dispatch(void) if (!clientReady) return; + SmartScheduleSlice = SmartScheduleInterval; while (!dispatchException) { if (*icheck[0] != *icheck[1]) @@ -455,6 +474,7 @@ Dispatch(void) KillAllClients(); xfree(clientReady); dispatchException &= ~DE_RESET; + SmartScheduleLatencyLimited = 0; } #undef MAJOROP |