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Commit b4c4654c authored by Erik Staats's avatar Erik Staats Committed by Mark Salyzyn
Browse files

Change get_sched_policy to check "schedtune" and "cpuset". 

get_sched_policy will first attempt to get the policy from the "schedtune"
subsystem cgroup and, if not set, attempt to get the policy from the
"cpuset" subsystem cgroup.  If neither subsystem has a cgroup set,
SP_FOREGROUND is returned.

Bug: 32972117
Test: Verified that SchedPolicy libcutils test passes and that ps displays
the expected policies.  See details in testing done comment in
https://android-review.googlesource.com/379426 .

Change-Id: I586a921a38eea99d65590b07ece96c9808a2e56d
parent 41346e55

libcutils/sched_policy.cpp

+18 −18
Original line number Diff line number Diff line
@@ -263,8 +263,13 @@ int get_sched_policy(int tid, SchedPolicy *policy) 


    char grpBuf[32];



    if (cpusets_enabled()) {

    grpBuf[0] = '\0';

    if (schedboost_enabled()) {

        if (getCGroupSubsys(tid, "schedtune", grpBuf, sizeof(grpBuf)) < 0) return -1;

    }

    if ((grpBuf[0] == '\0') && cpusets_enabled()) {

        if (getCGroupSubsys(tid, "cpuset", grpBuf, sizeof(grpBuf)) < 0) return -1;

    }

    if (grpBuf[0] == '\0') {

        *policy = SP_FOREGROUND;

    } else if (!strcmp(grpBuf, "foreground")) {
@@ -279,11 +284,6 @@ int get_sched_policy(int tid, SchedPolicy *policy) 
        errno = ERANGE;

        return -1;

    }

    } else {

        // In b/34193533, we removed bg_non_interactive cgroup, so now

        // all threads are in FOREGROUND cgroup

        *policy = SP_FOREGROUND;

    }

    return 0;

}