commit 770ee49abbd652ccf298dc0d26b6f47ef4ef4862
author Tim Murray <timmurray@google.com> Fri Jul 08 15:47:11 2016 -0700
committer gitbuildkicker <android-build@google.com> Mon Jul 11 14:52:06 2016 -0700
tree 4a049b5bf10b701fd7dd7a3a8d57913714d6ce44
parent 961844b7951e3bac0444255e9a3e3369b950ea7b

Set stune groups from set_sched_policy.

bug 29512132

Change-Id: Ib4176b80787db9e7ace9468cbf670f05cc428786

libcutils/sched_policy.c

diff --git a/libcutils/sched_policy.c b/libcutils/sched_policy.c
index ac12f2e..ff38e50 100644
--- a/libcutils/sched_policy.c
+++ b/libcutils/sched_policy.c
@@ -66,9 +66,11 @@
 static int bg_cpuset_fd = -1;
 static int fg_cpuset_fd = -1;
 static int ta_cpuset_fd = -1; // special cpuset for top app
+#endif
+
+// File descriptors open to /dev/stune/../tasks, setup by initialize, or -1 on error
 static int bg_schedboost_fd = -1;
 static int fg_schedboost_fd = -1;
-#endif
 
 /* Add tid to the scheduling group defined by the policy */
 static int add_tid_to_cgroup(int tid, int fd)
@@ -313,10 +315,12 @@
             return -errno;
     }
 
+#ifdef USE_SCHEDBOOST
     if (boost_fd > 0 && add_tid_to_cgroup(tid, boost_fd) != 0) {
         if (errno != ESRCH && errno != ENOENT)
             return -errno;
     }
+#endif
 
     return 0;
 #endif
@@ -373,19 +377,26 @@
 #endif
 
     if (__sys_supports_schedgroups) {
-        int fd;
+        int fd = -1;
+        int boost_fd = -1;
         switch (policy) {
         case SP_BACKGROUND:
             fd = bg_cgroup_fd;
+            boost_fd = bg_schedboost_fd;
             break;
         case SP_FOREGROUND:
         case SP_AUDIO_APP:
         case SP_AUDIO_SYS:
+            fd = fg_cgroup_fd;
+            boost_fd = bg_schedboost_fd;
+            break;
         case SP_TOP_APP:
             fd = fg_cgroup_fd;
+            boost_fd = fg_schedboost_fd;
             break;
         default:
             fd = -1;
+            boost_fd = -1;
             break;
         }
 
@@ -394,6 +405,13 @@
             if (errno != ESRCH && errno != ENOENT)
                 return -errno;
         }
+
+#ifdef USE_SCHEDBOOST
+        if (boost_fd > 0 && add_tid_to_cgroup(tid, boost_fd) != 0) {
+            if (errno != ESRCH && errno != ENOENT)
+                return -errno;
+        }
+#endif
     } else {
         struct sched_param param;