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Commit ed607889 authored by Todd Kjos's avatar Todd Kjos Committed by Rom Lemarchand
Browse files

Actively mangage EAS schedtune nodes 

Move foreground tasks to /sys/fs/cgroup/stune/boost/tasks (boosted
weight in EAS scheduler). Move background tasks to
/sys/fs/cgroup/stune/tasks (default weight). For services started
with init, set "foreground" services to boosted.

Change-Id: I0e489fad9510727c13e6754dabaf311c2391f395
parent 1589fa1b

libcutils/Android.mk

+6 −0
Original line number Diff line number Diff line
@@ -128,6 +128,9 @@ LOCAL_STATIC_LIBRARIES := liblog 
ifneq ($(ENABLE_CPUSETS),)

LOCAL_CFLAGS += -DUSE_CPUSETS

endif

ifneq ($(ENABLE_SCHEDBOOST),)

LOCAL_CFLAGS += -DUSE_SCHEDBOOST

endif

LOCAL_CFLAGS += -Werror -std=gnu90

include $(BUILD_STATIC_LIBRARY)
@@ -140,6 +143,9 @@ LOCAL_SHARED_LIBRARIES := liblog 
ifneq ($(ENABLE_CPUSETS),)

LOCAL_CFLAGS += -DUSE_CPUSETS

endif

ifneq ($(ENABLE_SCHEDBOOST),)

LOCAL_CFLAGS += -DUSE_SCHEDBOOST

endif

LOCAL_CFLAGS += -Werror

LOCAL_C_INCLUDES := $(libcutils_c_includes)

include $(BUILD_SHARED_LIBRARY)

libcutils/sched_policy.c

+17 −1
Original line number Diff line number Diff line
@@ -63,6 +63,8 @@ static int fg_cgroup_fd = -1; 
// File descriptors open to /dev/cpuset/../tasks, setup by initialize, or -1 on error

static int bg_cpuset_fd = -1;

static int fg_cpuset_fd = -1;

static int bg_schedboost_fd = -1;

static int fg_schedboost_fd = -1;



/* Add tid to the scheduling group defined by the policy */

static int add_tid_to_cgroup(int tid, int fd)
@@ -126,6 +128,12 @@ 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);

#ifdef USE_SCHEDBOOST

        filename = "/sys/fs/cgroup/stune/foreground/tasks";

        fg_schedboost_fd = open(filename, O_WRONLY | O_CLOEXEC);

        filename = "/sys/fs/cgroup/stune/tasks";

        bg_schedboost_fd = open(filename, O_WRONLY | O_CLOEXEC);

#endif

    }

#endif
@@ -251,17 +259,20 @@ int set_cpuset_policy(int tid, SchedPolicy policy) 
    pthread_once(&the_once, __initialize);



    int fd;

    int boost_fd;

    switch (policy) {

    case SP_BACKGROUND:

        fd = bg_cpuset_fd;

        boost_fd = bg_schedboost_fd;

        break;

    case SP_FOREGROUND:

    case SP_AUDIO_APP:

    case SP_AUDIO_SYS:

        fd = fg_cpuset_fd;

        boost_fd = fg_schedboost_fd;

        break;

    default:

        fd = -1;

        boost_fd = fd = -1;

        break;

    }
@@ -270,6 +281,11 @@ int set_cpuset_policy(int tid, SchedPolicy policy) 
            return -errno;

    }



    if (boost_fd > 0 && add_tid_to_cgroup(tid, boost_fd) != 0) {

        if (errno != ESRCH && errno != ENOENT)

            return -errno;

    }



    return 0;

#endif

}

rootdir/init.rc

+15 −1
Original line number Diff line number Diff line
@@ -48,6 +48,17 @@ on init 
    chown root system /sys/fs/cgroup/memory/sw/tasks

    chmod 0660 /sys/fs/cgroup/memory/sw/tasks



    # Create energy-aware scheduler tuning nodes

    mkdir /sys/fs/cgroup/stune

    mount cgroup none /sys/fs/cgroup/stune schedtune

    mkdir /sys/fs/cgroup/stune/foreground

    chown system system /sys/fs/cgroup/stune

    chown system system /sys/fs/cgroup/stune/foreground

    chown system system /sys/fs/cgroup/stune/tasks

    chown system system /sys/fs/cgroup/stune/foreground/tasks

    chmod 0664 /sys/fs/cgroup/stune/tasks

    chmod 0664 /sys/fs/cgroup/stune/foreground/tasks



    mkdir /system

    mkdir /data 0771 system system

    mkdir /cache 0770 system cache
@@ -165,13 +176,16 @@ on init 
    chown system system /dev/cpuset/foreground

    chown system system /dev/cpuset/foreground/boost

    chown system system /dev/cpuset/background

    chown system system /dev/cpuset/system-background

    chown system system /dev/cpuset/tasks

    chown system system /dev/cpuset/foreground/tasks

    chown system system /dev/cpuset/foreground/boost/tasks

    chown system system /dev/cpuset/background/tasks

    chown system system /dev/cpuset/system-background/tasks

    chmod 0664 /dev/cpuset/foreground/tasks

    chmod 0664 /dev/cpuset/foreground/boost/tasks

    chmod 0664 /dev/cpuset/background/tasks

    chmod 0664 /dev/cpuset/system-background/tasks

    chmod 0664 /dev/cpuset/tasks
@@ -646,7 +660,7 @@ service surfaceflinger /system/bin/surfaceflinger 
    user system

    group graphics drmrpc

    onrestart restart zygote

    writepid /dev/cpuset/system-background/tasks

    writepid /sys/fs/cgroup/stune/foreground/tasks /dev/cpuset/system-background/tasks



service drm /system/bin/drmserver

    class main

rootdir/init.zygote32.rc

+1 −1
Original line number Diff line number Diff line
@@ -5,4 +5,4 @@ service zygote /system/bin/app_process -Xzygote /system/bin --zygote --start-sys 
    onrestart write /sys/power/state on

    onrestart restart media

    onrestart restart netd

    writepid /dev/cpuset/foreground/tasks
 
    writepid /dev/cpuset/foreground/tasks /sys/fs/cgroup/stune/foreground/tasks

rootdir/init.zygote32_64.rc

+2 −2
Original line number Diff line number Diff line
@@ -5,10 +5,10 @@ service zygote /system/bin/app_process32 -Xzygote /system/bin --zygote --start-s 
    onrestart write /sys/power/state on

    onrestart restart media

    onrestart restart netd

    writepid /dev/cpuset/foreground/tasks

    writepid /dev/cpuset/foreground/tasks /sys/fs/cgroup/stune/foreground/tasks



service zygote_secondary /system/bin/app_process64 -Xzygote /system/bin --zygote --socket-name=zygote_secondary

    class main

    socket zygote_secondary stream 660 root system

    onrestart restart zygote

    writepid /dev/cpuset/foreground/tasks
 
 No newline at end of file
 
    writepid /dev/cpuset/foreground/tasks /sys/fs/cgroup/stune/foreground/tasks