release-request-3b995630-3bae-4f9e-868a-935ab7740cc9-for-git_nyc-mr2-pixel-monthly-release-3934930 snap-temp-L20000000060688928
Change-Id: I0b0e54d53ba4dd01b340a98cbd22998853fcb7ae
diff --git a/libcutils/sched_policy.c b/libcutils/sched_policy.c
index e11eb2e..6d90589 100644
--- a/libcutils/sched_policy.c
+++ b/libcutils/sched_policy.c
@@ -56,6 +56,10 @@
static int __sys_supports_schedgroups = -1;
+// File descriptors open to /dev/cpuctl/../tasks, setup by initialize, or -1 on error.
+static int bg_cgroup_fd = -1;
+static int fg_cgroup_fd = -1;
+
#ifdef USE_CPUSETS
// File descriptors open to /dev/cpuset/../tasks, setup by initialize, or -1 on error
static int system_bg_cpuset_fd = -1;
@@ -69,7 +73,6 @@
static int fg_schedboost_fd = -1;
static int ta_schedboost_fd = -1;
-#if defined(USE_CPUSETS) || defined(USE_SCHEDBOOST)
/* Add tid to the scheduling group defined by the policy */
static int add_tid_to_cgroup(int tid, int fd)
{
@@ -104,18 +107,30 @@
return 0;
}
-#endif //defined(USE_CPUSETS) || defined(USE_SCHEDBOOST)
static void __initialize(void) {
+ char* filename;
if (!access("/dev/cpuctl/tasks", F_OK)) {
__sys_supports_schedgroups = 1;
+
+ filename = "/dev/cpuctl/tasks";
+ fg_cgroup_fd = open(filename, O_WRONLY | O_CLOEXEC);
+ if (fg_cgroup_fd < 0) {
+ SLOGE("open of %s failed: %s\n", filename, strerror(errno));
+ }
+
+ filename = "/dev/cpuctl/bg_non_interactive/tasks";
+ bg_cgroup_fd = open(filename, O_WRONLY | O_CLOEXEC);
+ if (bg_cgroup_fd < 0) {
+ SLOGE("open of %s failed: %s\n", filename, strerror(errno));
+ }
} else {
__sys_supports_schedgroups = 0;
}
#ifdef USE_CPUSETS
if (!access("/dev/cpuset/tasks", F_OK)) {
- char* filename;
+
filename = "/dev/cpuset/foreground/tasks";
fg_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
filename = "/dev/cpuset/background/tasks";
@@ -365,24 +380,35 @@
#endif
if (__sys_supports_schedgroups) {
+ 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 = fg_schedboost_fd;
break;
case SP_TOP_APP:
+ fd = fg_cgroup_fd;
boost_fd = ta_schedboost_fd;
break;
default:
+ fd = -1;
boost_fd = -1;
break;
}
+
+ if (fd > 0 && add_tid_to_cgroup(tid, fd) != 0) {
+ 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)
