reduce PB size from 2MB to 512KB
this allows us to enable h/w acceleration on low-end
devices while keeping memory usage down.
Bug: 6557760
Change-Id: I8af2de3038dc2579360b8b73aa452cb7a0e506a9
diff --git a/opengl/libs/EGL/Loader.cpp b/opengl/libs/EGL/Loader.cpp
index 0b1016c..9ee3686 100644
--- a/opengl/libs/EGL/Loader.cpp
+++ b/opengl/libs/EGL/Loader.cpp
@@ -81,6 +81,24 @@
// ----------------------------------------------------------------------------
+static char const * getProcessCmdline() {
+ long pid = getpid();
+ char procPath[128];
+ snprintf(procPath, 128, "/proc/%ld/cmdline", pid);
+ FILE * file = fopen(procPath, "r");
+ if (file) {
+ static char cmdline[256];
+ char *str = fgets(cmdline, sizeof(cmdline) - 1, file);
+ fclose(file);
+ if (str) {
+ return cmdline;
+ }
+ }
+ return NULL;
+}
+
+// ----------------------------------------------------------------------------
+
Loader::driver_t::driver_t(void* gles)
{
dso[0] = gles;
@@ -280,6 +298,35 @@
ALOGE_IF(!getProcAddress,
"can't find eglGetProcAddress() in %s", driver_absolute_path);
+#ifdef SYSTEMUI_PBSIZE_HACK
+#warning "SYSTEMUI_PBSIZE_HACK enabled"
+ /*
+ * TODO: replace SYSTEMUI_PBSIZE_HACK by something less hackish
+ *
+ * Here we adjust the PB size from its default value to 512KB which
+ * is the minimum acceptable for the systemui process.
+ * We do this on low-end devices only because it allows us to enable
+ * h/w acceleration in the systemui process while keeping the
+ * memory usage down.
+ *
+ * Obviously, this is the wrong place and wrong way to make this
+ * adjustment, but at the time of this writing this was the safest
+ * solution.
+ */
+ const char *cmdline = getProcessCmdline();
+ if (strstr(cmdline, "systemui")) {
+ void *imgegl = dlopen("/vendor/lib/libIMGegl.so", RTLD_LAZY);
+ if (imgegl) {
+ unsigned int *PVRDefaultPBS =
+ (unsigned int *)dlsym(imgegl, "PVRDefaultPBS");
+ if (PVRDefaultPBS) {
+ ALOGD("setting default PBS to 512KB, was %d KB", *PVRDefaultPBS / 1024);
+ *PVRDefaultPBS = 512*1024;
+ }
+ }
+ }
+#endif
+
egl_t* egl = &cnx->egl;
__eglMustCastToProperFunctionPointerType* curr =
(__eglMustCastToProperFunctionPointerType*)egl;