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cutils: add restricted cpuset

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Bug 78197570
Test: CTS
Exempt-From-Owner-Approval: owner OOO, build cop says it's fine

Change-Id: I6df972950b75a839caa463ae282ad000b959e8ae
This commit is contained in:
Tim Murray 2018-04-13 10:15:49 -07:00
parent e58d713e47
commit 658ae90f69
3 changed files with 27 additions and 15 deletions
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15
libcutils/include/cutils/sched_policy.h
View file

@ -40,16 +40,17 @@ extern bool schedboost_enabled();
/* Keep in sync with THREAD_GROUP_* in frameworks/base/core/java/android/os/Process.java */
typedef enum {
SP_DEFAULT = -1,
SP_DEFAULT = -1,
SP_BACKGROUND = 0,
SP_FOREGROUND = 1,
SP_SYSTEM = 2, // can't be used with set_sched_policy()
SP_AUDIO_APP = 3,
SP_AUDIO_SYS = 4,
SP_TOP_APP = 5,
SP_RT_APP = 6,
SP_SYSTEM = 2, // can't be used with set_sched_policy()
SP_AUDIO_APP = 3,
SP_AUDIO_SYS = 4,
SP_TOP_APP = 5,
SP_RT_APP = 6,
SP_RESTRICTED = 7,
SP_CNT,
SP_MAX = SP_CNT - 1,
SP_MAX = SP_CNT - 1,
SP_SYSTEM_DEFAULT = SP_FOREGROUND,
} SchedPolicy;

18
libcutils/sched_policy.cpp
View file

@ -57,6 +57,7 @@ static int system_bg_cpuset_fd = -1;
static int bg_cpuset_fd = -1;
static int fg_cpuset_fd = -1;
static int ta_cpuset_fd = -1; // special cpuset for top app
static int rs_cpuset_fd = -1; // special cpuset for screen off restrictions
// File descriptors open to /dev/stune/../tasks, setup by initialize, or -1 on error
static int bg_schedboost_fd = -1;
@ -151,6 +152,8 @@ static void __initialize() {
system_bg_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
filename = "/dev/cpuset/top-app/tasks";
ta_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
filename = "/dev/cpuset/restricted/tasks";
rs_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
if (schedboost_enabled()) {
filename = "/dev/stune/top-app/tasks";
@ -308,6 +311,9 @@ int set_cpuset_policy(int tid, SchedPolicy policy)
case SP_SYSTEM:
fd = system_bg_cpuset_fd;
break;
case SP_RESTRICTED:
fd = rs_cpuset_fd;
break;
default:
boost_fd = fd = -1;
break;
@ -457,14 +463,10 @@ int get_sched_policy(int /*tid*/, SchedPolicy* policy) {
const char *get_sched_policy_name(SchedPolicy policy)
{
policy = _policy(policy);
static const char * const strings[SP_CNT] = {
[SP_BACKGROUND] = "bg",
[SP_FOREGROUND] = "fg",
[SP_SYSTEM] = " ",
[SP_AUDIO_APP] = "aa",
[SP_AUDIO_SYS] = "as",
[SP_TOP_APP] = "ta",
[SP_RT_APP] = "rt",
static const char* const strings[SP_CNT] = {
[SP_BACKGROUND] = "bg", [SP_FOREGROUND] = "fg", [SP_SYSTEM] = " ",
[SP_AUDIO_APP] = "aa", [SP_AUDIO_SYS] = "as", [SP_TOP_APP] = "ta",
[SP_RT_APP] = "rt", [SP_RESTRICTED] = "rs",
};
if ((policy < SP_CNT) && (strings[policy] != NULL))
return strings[policy];

9
rootdir/init.rc
View file

@ -176,6 +176,12 @@ on init
copy /dev/cpuset/cpus /dev/cpuset/system-background/cpus
copy /dev/cpuset/mems /dev/cpuset/system-background/mems
# restricted is for system tasks that are being throttled
# due to screen off.
mkdir /dev/cpuset/restricted
copy /dev/cpuset/cpus /dev/cpuset/restricted/cpus
copy /dev/cpuset/mems /dev/cpuset/restricted/mems
mkdir /dev/cpuset/top-app
copy /dev/cpuset/cpus /dev/cpuset/top-app/cpus
copy /dev/cpuset/mems /dev/cpuset/top-app/mems
@ -186,11 +192,13 @@ on init
chown system system /dev/cpuset/background
chown system system /dev/cpuset/system-background
chown system system /dev/cpuset/top-app
chown system system /dev/cpuset/restricted
chown system system /dev/cpuset/tasks
chown system system /dev/cpuset/foreground/tasks
chown system system /dev/cpuset/background/tasks
chown system system /dev/cpuset/system-background/tasks
chown system system /dev/cpuset/top-app/tasks
chown system system /dev/cpuset/restricted/tasks
# set system-background to 0775 so SurfaceFlinger can touch it
chmod 0775 /dev/cpuset/system-background
@ -199,6 +207,7 @@ on init
chmod 0664 /dev/cpuset/background/tasks
chmod 0664 /dev/cpuset/system-background/tasks
chmod 0664 /dev/cpuset/top-app/tasks
chmod 0664 /dev/cpuset/restricted/tasks
chmod 0664 /dev/cpuset/tasks