SF: Tie main thread priority to active display
Otherwise, the powering off of the outer display when exiting concurrent
mode causes SF to drop real-time priority until the next powering on of
either display.
Fixes: 271431077
Test: Logs during boot, power on/off, fold/unfold, concurrent mode.
Change-Id: I4f1590d7abf82977c1acd162605f578624bc9faa
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 3c55caf..91f945b 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -5488,14 +5488,19 @@
onActiveDisplayChangedLocked(activeDisplay.get(), *display);
}
- // Keep uclamp in a separate syscall and set it before changing to RT due to b/190237315.
- // We can merge the syscall later.
- if (SurfaceFlinger::setSchedAttr(true) != NO_ERROR) {
- ALOGW("Couldn't set uclamp.min on display on: %s\n", strerror(errno));
+ if (displayId == mActiveDisplayId) {
+ // TODO(b/281692563): Merge the syscalls. For now, keep uclamp in a separate syscall and
+ // set it before SCHED_FIFO due to b/190237315.
+ if (setSchedAttr(true) != NO_ERROR) {
+ ALOGW("Failed to set uclamp.min after powering on active display: %s",
+ strerror(errno));
+ }
+ if (setSchedFifo(true) != NO_ERROR) {
+ ALOGW("Failed to set SCHED_FIFO after powering on active display: %s",
+ strerror(errno));
+ }
}
- if (SurfaceFlinger::setSchedFifo(true) != NO_ERROR) {
- ALOGW("Couldn't set SCHED_FIFO on display on: %s\n", strerror(errno));
- }
+
getHwComposer().setPowerMode(displayId, mode);
if (displayId == mActiveDisplayId && mode != hal::PowerMode::DOZE_SUSPEND) {
setHWCVsyncEnabled(displayId,
@@ -5509,15 +5514,21 @@
scheduleComposite(FrameHint::kActive);
} else if (mode == hal::PowerMode::OFF) {
// Turn off the display
- if (SurfaceFlinger::setSchedFifo(false) != NO_ERROR) {
- ALOGW("Couldn't set SCHED_OTHER on display off: %s\n", strerror(errno));
- }
- if (SurfaceFlinger::setSchedAttr(false) != NO_ERROR) {
- ALOGW("Couldn't set uclamp.min on display off: %s\n", strerror(errno));
- }
- if (displayId == mActiveDisplayId && *currentModeOpt != hal::PowerMode::DOZE_SUSPEND) {
- mScheduler->disableHardwareVsync(displayId, true);
- mScheduler->enableSyntheticVsync();
+
+ if (displayId == mActiveDisplayId) {
+ if (setSchedFifo(false) != NO_ERROR) {
+ ALOGW("Failed to set SCHED_OTHER after powering off active display: %s",
+ strerror(errno));
+ }
+ if (setSchedAttr(false) != NO_ERROR) {
+ ALOGW("Failed set uclamp.min after powering off active display: %s",
+ strerror(errno));
+ }
+
+ if (*currentModeOpt != hal::PowerMode::DOZE_SUSPEND) {
+ mScheduler->disableHardwareVsync(displayId, true);
+ mScheduler->enableSyntheticVsync();
+ }
}
// Make sure HWVsync is disabled before turning off the display
diff --git a/services/surfaceflinger/main_surfaceflinger.cpp b/services/surfaceflinger/main_surfaceflinger.cpp
index 0495678..cf23169 100644
--- a/services/surfaceflinger/main_surfaceflinger.cpp
+++ b/services/surfaceflinger/main_surfaceflinger.cpp
@@ -91,7 +91,7 @@
// Set uclamp.min setting on all threads, maybe an overkill but we want
// to cover important threads like RenderEngine.
if (SurfaceFlinger::setSchedAttr(true) != NO_ERROR) {
- ALOGW("Couldn't set uclamp.min: %s\n", strerror(errno));
+ ALOGW("Failed to set uclamp.min during boot: %s", strerror(errno));
}
// The binder threadpool we start will inherit sched policy and priority
@@ -155,7 +155,7 @@
startDisplayService(); // dependency on SF getting registered above
if (SurfaceFlinger::setSchedFifo(true) != NO_ERROR) {
- ALOGW("Couldn't set to SCHED_FIFO: %s", strerror(errno));
+ ALOGW("Failed to set SCHED_FIFO during boot: %s", strerror(errno));
}
// run surface flinger in this thread