commit 7f4d0c9705af50351753b608fc107e0220c9a2f4
author Jason Sams <rjsams@android.com> Mon Jul 26 17:12:55 2010 -0700
committer Jason Sams <rjsams@android.com> Mon Jul 26 17:12:55 2010 -0700
tree 30994da0e42b15bd38da3b8b4e1e682eb2f1ea22
parent b621677c97ba80804a5ae5d53167616774908867

Query the CPU count and use the result to determine
if and how many worker threads we use.

Change-Id: I8fc1fb17aff835cfe8ed7c474287bccd532cbb29

libs/rs/rsContext.cpp

diff --git a/libs/rs/rsContext.cpp b/libs/rs/rsContext.cpp
index e897d00..d6df581 100644
--- a/libs/rs/rsContext.cpp
+++ b/libs/rs/rsContext.cpp
@@ -468,8 +468,11 @@
     timerInit();
     timerSet(RS_TIMER_INTERNAL);
 
-    LOGV("RS Launching thread(s)");
-    mWorkers.mCount = 2;
+    int cpu = sysconf(_SC_NPROCESSORS_ONLN);
+    LOGV("RS Launching thread(s), reported CPU count %i", cpu);
+    if (cpu < 2) cpu = 0;
+
+    mWorkers.mCount = (uint32_t)cpu;
     mWorkers.mThreadId = (pthread_t *) calloc(mWorkers.mCount, sizeof(pthread_t));
     mWorkers.mNativeThreadId = (pid_t *) calloc(mWorkers.mCount, sizeof(pid_t));
     mWorkers.mLaunchSignals = new Signal[mWorkers.mCount];