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platform_system_core
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Merge "Improve cpuset support for surfaceflinger."

This commit is contained in:
Tim Murray 2016-01-25 18:45:01 +00:00 committed by Android (Google) Code Review
parent 6ddde53e8e 4284f9f3a3
commit 1293fed9a3
2 changed files with 12 additions and 1 deletions
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9
libcutils/sched_policy.c
View File

@ -62,6 +62,7 @@ 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;
static int bg_cpuset_fd = -1;
static int fg_cpuset_fd = -1;
static int bg_schedboost_fd = -1;
@ -130,6 +131,9 @@ static void __initialize(void) {
fg_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
filename = "/dev/cpuset/background/tasks";
bg_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
filename = "/dev/cpuset/system-background/tasks";
system_bg_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
#ifdef USE_SCHEDBOOST
filename = "/sys/fs/cgroup/stune/foreground/tasks";
fg_schedboost_fd = open(filename, O_WRONLY | O_CLOEXEC);
@ -138,7 +142,6 @@ static void __initialize(void) {
#endif
}
#endif
}
/*
@ -273,6 +276,10 @@ int set_cpuset_policy(int tid, SchedPolicy policy)
fd = fg_cpuset_fd;
boost_fd = fg_schedboost_fd;
break;
case SP_SYSTEM:
fd = system_bg_cpuset_fd;
boost_fd = bg_schedboost_fd;
break;
default:
boost_fd = fd = -1;
break;

4
rootdir/init.rc
View File

@ -184,6 +184,10 @@ on init
chown system system /dev/cpuset/foreground/boost/tasks
chown system system /dev/cpuset/background/tasks
chown system system /dev/cpuset/system-background/tasks
# set system-background to 0775 so SurfaceFlinger can touch it
chmod 0775 /dev/cpuset/system-background
chmod 0664 /dev/cpuset/foreground/tasks
chmod 0664 /dev/cpuset/foreground/boost/tasks
chmod 0664 /dev/cpuset/background/tasks