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| author | Ruchi Kandoi <kandoiruchi@google.com> | 2014-04-22 18:55:08 -0700 |
|---|---|---|
| committer | Ruchi Kandoi <kandoiruchi@google.com> | 2014-04-23 21:56:40 +0000 |
| commit | 422852ef5c0c2b0b5e031f80f480486df3d185a0 (patch) | |
| tree | ee01f2e3a2ee1b947500ddb560c6986bce00cd95 /libcutils | |
| parent | 00b8972062fb32dd02bcac7821a6612ce27ebd86 (diff) | |
| download | system_core-422852ef5c0c2b0b5e031f80f480486df3d185a0.zip system_core-422852ef5c0c2b0b5e031f80f480486df3d185a0.tar.gz system_core-422852ef5c0c2b0b5e031f80f480486df3d185a0.tar.bz2 | |
Set timer slack value according to thread foreground/background state.
Change-Id: Ia998f349129acf4602b767d1ff94839607fdbdbd
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
Diffstat (limited to 'libcutils')
| -rw-r--r-- | libcutils/sched_policy.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libcutils/sched_policy.c b/libcutils/sched_policy.c index d20d217..bc49e88 100644 --- a/libcutils/sched_policy.c +++ b/libcutils/sched_policy.c @@ -26,6 +26,7 @@ #include <fcntl.h> #include <cutils/sched_policy.h> #include <cutils/log.h> +#include <linux/prctl.h> /* Re-map SP_DEFAULT to the system default policy, and leave other values unchanged. * Call this any place a SchedPolicy is used as an input parameter. @@ -53,6 +54,9 @@ static inline SchedPolicy _policy(SchedPolicy p) #define CAN_SET_SP_SYSTEM 0 // non-zero means to implement set_sched_policy(tid, SP_SYSTEM) +// timer slack value in nS enforced when the thread moves to background +#define TIMER_SLACK_BG 40000000 + static pthread_once_t the_once = PTHREAD_ONCE_INIT; static int __sys_supports_schedgroups = -1; @@ -324,6 +328,8 @@ int set_sched_policy(int tid, SchedPolicy policy) ¶m); } + prctl(PR_SET_TIMERSLACK_PID, policy == SP_BACKGROUND ? TIMER_SLACK_BG : 0, tid); + return 0; } |