tequilaOS/platform_system_core
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Merge "Make the default cgroup, the foreground cgroup." into lmp-mr1-dev

Browse source
This commit is contained in:
Riley Andrews 2014-10-08 20:40:22 +00:00 committed by Android (Google) Code Review
commit 33b335495c
2 changed files with 11 additions and 38 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
libcutils/sched_policy.c
View file

@ -45,8 +45,6 @@ static inline SchedPolicy _policy(SchedPolicy p)
#define POLICY_DEBUG 0
#define CAN_SET_SP_SYSTEM 0 // non-zero means to implement set_sched_policy(tid, SP_SYSTEM)
// This prctl is only available in Android kernels.
#define PR_SET_TIMERSLACK_PID 41
@ -60,9 +58,6 @@ 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;
#if CAN_SET_SP_SYSTEM
static int system_cgroup_fd = -1;
#endif
/* Add tid to the scheduling group defined by the policy */
static int add_tid_to_cgroup(int tid, SchedPolicy policy)
@ -78,11 +73,6 @@ static int add_tid_to_cgroup(int tid, SchedPolicy policy)
case SP_AUDIO_SYS:
fd = fg_cgroup_fd;
break;
#if CAN_SET_SP_SYSTEM
case SP_SYSTEM:
fd = system_cgroup_fd;
break;
#endif
default:
fd = -1;
break;
@ -123,21 +113,13 @@ static void __initialize(void) {
if (!access("/dev/cpuctl/tasks", F_OK)) {
__sys_supports_schedgroups = 1;
#if CAN_SET_SP_SYSTEM
filename = "/dev/cpuctl/tasks";
system_cgroup_fd = open(filename, O_WRONLY | O_CLOEXEC);
if (system_cgroup_fd < 0) {
SLOGV("open of %s failed: %s\n", filename, strerror(errno));
}
#endif
filename = "/dev/cpuctl/apps/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/apps/bg_non_interactive/tasks";
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));
@ -233,11 +215,9 @@ int get_sched_policy(int tid, SchedPolicy *policy)
if (getSchedulerGroup(tid, grpBuf, sizeof(grpBuf)) < 0)
return -1;
if (grpBuf[0] == '\0') {
*policy = SP_SYSTEM;
} else if (!strcmp(grpBuf, "apps/bg_non_interactive")) {
*policy = SP_BACKGROUND;
} else if (!strcmp(grpBuf, "apps")) {
*policy = SP_FOREGROUND;
} else if (!strcmp(grpBuf, "bg_non_interactive")) {
*policy = SP_BACKGROUND;
} else {
errno = ERANGE;
return -1;

23
rootdir/init.rc
View file

@ -119,25 +119,18 @@ on init
mount cgroup none /dev/cpuctl cpu
chown system system /dev/cpuctl
chown system system /dev/cpuctl/tasks
chmod 0660 /dev/cpuctl/tasks
chmod 0666 /dev/cpuctl/tasks
write /dev/cpuctl/cpu.shares 1024
write /dev/cpuctl/cpu.rt_runtime_us 950000
write /dev/cpuctl/cpu.rt_runtime_us 800000
write /dev/cpuctl/cpu.rt_period_us 1000000
mkdir /dev/cpuctl/apps
chown system system /dev/cpuctl/apps/tasks
chmod 0666 /dev/cpuctl/apps/tasks
write /dev/cpuctl/apps/cpu.shares 1024
write /dev/cpuctl/apps/cpu.rt_runtime_us 800000
write /dev/cpuctl/apps/cpu.rt_period_us 1000000
mkdir /dev/cpuctl/apps/bg_non_interactive
chown system system /dev/cpuctl/apps/bg_non_interactive/tasks
chmod 0666 /dev/cpuctl/apps/bg_non_interactive/tasks
mkdir /dev/cpuctl/bg_non_interactive
chown system system /dev/cpuctl/bg_non_interactive/tasks
chmod 0666 /dev/cpuctl/bg_non_interactive/tasks
# 5.0 %
write /dev/cpuctl/apps/bg_non_interactive/cpu.shares 52
write /dev/cpuctl/apps/bg_non_interactive/cpu.rt_runtime_us 700000
write /dev/cpuctl/apps/bg_non_interactive/cpu.rt_period_us 1000000
write /dev/cpuctl/bg_non_interactive/cpu.shares 52
write /dev/cpuctl/bg_non_interactive/cpu.rt_runtime_us 700000
write /dev/cpuctl/bg_non_interactive/cpu.rt_period_us 1000000
# qtaguid will limit access to specific data based on group memberships.
# net_bw_acct grants impersonation of socket owners.