Allow triming of font caches through WindowManager
This allows triming of Skia font caches when an app created a lot of
transient font allocations and it knows that it won't need it anymore.
This is primarily meant for persistent processes like SystemUI to avoid
font caches taking up memory after they're not needed anymore.
Bug: 275486055
Test: Tested as part of a follow-up commit, ran
LockscreenWithSwipeMicrobenchmark which showed a noticable
reduction of RSS+anon memory use after unlock.
Change-Id: I6d80003d8baab35cb2ca858d4e4d4696b32f3adf
diff --git a/libs/hwui/renderthread/CacheManager.cpp b/libs/hwui/renderthread/CacheManager.cpp
index c00a270..babce88 100644
--- a/libs/hwui/renderthread/CacheManager.cpp
+++ b/libs/hwui/renderthread/CacheManager.cpp
@@ -139,6 +139,25 @@
}
}
+void CacheManager::trimCaches(CacheTrimLevel mode) {
+ switch (mode) {
+ case CacheTrimLevel::FONT_CACHE:
+ SkGraphics::PurgeFontCache();
+ break;
+ case CacheTrimLevel::RESOURCE_CACHE:
+ SkGraphics::PurgeResourceCache();
+ break;
+ case CacheTrimLevel::ALL_CACHES:
+ SkGraphics::PurgeAllCaches();
+ if (mGrContext) {
+ mGrContext->purgeUnlockedResources(false);
+ }
+ break;
+ default:
+ break;
+ }
+}
+
void CacheManager::trimStaleResources() {
if (!mGrContext) {
return;
diff --git a/libs/hwui/renderthread/CacheManager.h b/libs/hwui/renderthread/CacheManager.h
index d21ac9b..5e43ac2 100644
--- a/libs/hwui/renderthread/CacheManager.h
+++ b/libs/hwui/renderthread/CacheManager.h
@@ -48,6 +48,7 @@
void configureContext(GrContextOptions* context, const void* identity, ssize_t size);
#endif
void trimMemory(TrimLevel mode);
+ void trimCaches(CacheTrimLevel mode);
void trimStaleResources();
void dumpMemoryUsage(String8& log, const RenderState* renderState = nullptr);
void getMemoryUsage(size_t* cpuUsage, size_t* gpuUsage);
diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index 31b4b20..224c878 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -231,6 +231,15 @@
}
}
+void RenderProxy::trimCaches(int level) {
+ // Avoid creating a RenderThread to do a trimMemory.
+ if (RenderThread::hasInstance()) {
+ RenderThread& thread = RenderThread::getInstance();
+ const auto trimLevel = static_cast<CacheTrimLevel>(level);
+ thread.queue().post([&thread, trimLevel]() { thread.trimCaches(trimLevel); });
+ }
+}
+
void RenderProxy::purgeCaches() {
if (RenderThread::hasInstance()) {
RenderThread& thread = RenderThread::getInstance();
diff --git a/libs/hwui/renderthread/RenderProxy.h b/libs/hwui/renderthread/RenderProxy.h
index 82072a6..47c1b0c 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -105,6 +105,7 @@
void destroyHardwareResources();
static void trimMemory(int level);
+ static void trimCaches(int level);
static void purgeCaches();
static void overrideProperty(const char* name, const char* value);
diff --git a/libs/hwui/renderthread/RenderThread.cpp b/libs/hwui/renderthread/RenderThread.cpp
index 9ba67a2..eb28c08 100644
--- a/libs/hwui/renderthread/RenderThread.cpp
+++ b/libs/hwui/renderthread/RenderThread.cpp
@@ -521,6 +521,11 @@
cacheManager().trimMemory(level);
}
+void RenderThread::trimCaches(CacheTrimLevel level) {
+ ATRACE_CALL();
+ cacheManager().trimCaches(level);
+}
+
} /* namespace renderthread */
} /* namespace uirenderer */
} /* namespace android */
diff --git a/libs/hwui/renderthread/RenderThread.h b/libs/hwui/renderthread/RenderThread.h
index c77cd41..79e57de 100644
--- a/libs/hwui/renderthread/RenderThread.h
+++ b/libs/hwui/renderthread/RenderThread.h
@@ -174,6 +174,7 @@
}
void trimMemory(TrimLevel level);
+ void trimCaches(CacheTrimLevel level);
/**
* isCurrent provides a way to query, if the caller is running on