Implements thread utilization updates in CHRE
Bug: 110939839
Test: Compile and run, verify CHRE's updates are reflected
in the aggregate utilization metric
Change-Id: Ic9baa996c602974c8f017c98c3700450bab302b5
diff --git a/platform/slpi/see/include/chre/target_platform/power_control_manager_base.h b/platform/slpi/see/include/chre/target_platform/power_control_manager_base.h
index 9081262..22cdba4 100644
--- a/platform/slpi/see/include/chre/target_platform/power_control_manager_base.h
+++ b/platform/slpi/see/include/chre/target_platform/power_control_manager_base.h
@@ -17,10 +17,17 @@
#ifndef CHRE_PLATFORM_SLPI_SEE_POWER_CONTROL_MANAGER_BASE_H_
#define CHRE_PLATFORM_SLPI_SEE_POWER_CONTROL_MANAGER_BASE_H_
+extern "C" {
+#include "sns_client_thread_util.h"
+} // extern "C"
+
namespace chre {
class PowerControlManagerBase {
public:
+ PowerControlManagerBase();
+ ~PowerControlManagerBase();
+
/**
* Makes a power mode request. An actual vote to the SLPI power manager may
* not be cast depending on current power mode and mBigImageRefCount.
@@ -43,6 +50,13 @@
protected:
//! Set to true if the host is awake, false if suspended.
bool mHostIsAwake = true;
+
+ //! Set to true if the thread is currently idle (no pending events),
+ //! false otherwise.
+ bool mIsThreadIdle = true;
+
+ //! A pointer to the client to compute thread utilization
+ sns_thread_util_client *mThreadUtilClient = nullptr;
};
} // namespace chre
diff --git a/platform/slpi/see/power_control_manager.cc b/platform/slpi/see/power_control_manager.cc
index 3359723..ad49094 100644
--- a/platform/slpi/see/power_control_manager.cc
+++ b/platform/slpi/see/power_control_manager.cc
@@ -23,6 +23,14 @@
namespace chre {
+PowerControlManagerBase::PowerControlManagerBase() {
+ sns_client_create_thread_utilization_client(&mThreadUtilClient);
+}
+
+PowerControlManagerBase::~PowerControlManagerBase() {
+ sns_client_remove_thread_utilization_client(mThreadUtilClient);
+}
+
bool PowerControlManagerBase::voteBigImage(bool bigImage) {
return IslandVoteClientSingleton::get()->voteBigImage(bigImage);
}
@@ -50,6 +58,23 @@
}
void PowerControlManager::postEventLoopProcess(size_t numPendingEvents) {
+ // Although this execution point does not actually represent the start
+ // of the CHRE thread's activity, we only care about cases where the
+ // CHRE's event queue is highly backlogged for voting higher clock rates.
+ if (mIsThreadIdle && numPendingEvents != 0) {
+ sns_client_thread_utilization_start(mThreadUtilClient);
+ mIsThreadIdle = false;
+ } else if (!mIsThreadIdle) {
+ // Update the time profile as frequently as possible so that clock updates
+ // are not deferred until all events are processed.
+ sns_client_thread_utilization_stop(mThreadUtilClient);
+ if (numPendingEvents != 0) {
+ sns_client_thread_utilization_start(mThreadUtilClient);
+ } else {
+ mIsThreadIdle = true;
+ }
+ }
+
if (numPendingEvents == 0 && !slpiInUImage()) {
voteBigImage(false /* bigImage */);
}
