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| author | Tim Murray <timmurray@google.com> | 2016-10-12 18:20:51 +0000 |
|---|---|---|
| committer | android-build-merger <android-build-merger@google.com> | 2016-10-12 18:20:51 +0000 |
| commit | 20350c84183c5e779dcbee3a5ccae740c07cfc2b (patch) | |
| tree | cdd9e6dff26a486b5e35acef28c98fa1be119ed6 /libsuspend | |
| parent | 7bdbbfb0efc1bd9b94ff838c36dfc0f88be59862 (diff) | |
| parent | cf1183069543463855e7b3d7b1bd2309d4398d14 (diff) | |
| download | core-20350c84183c5e779dcbee3a5ccae740c07cfc2b.tar.gz core-20350c84183c5e779dcbee3a5ccae740c07cfc2b.tar.bz2 core-20350c84183c5e779dcbee3a5ccae740c07cfc2b.zip | |
libsuspend: move to exponential backoff am: fb896944b6
am: cf11830695
Change-Id: Ic3289a6cf433ee1c0c9b468ea8380493663ed84f
Diffstat (limited to 'libsuspend')
| -rw-r--r-- | libsuspend/autosuspend_wakeup_count.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/libsuspend/autosuspend_wakeup_count.c b/libsuspend/autosuspend_wakeup_count.c index d3fb45fcf..3457d5baf 100644 --- a/libsuspend/autosuspend_wakeup_count.c +++ b/libsuspend/autosuspend_wakeup_count.c @@ -24,6 +24,7 @@ #include <stddef.h> #include <stdbool.h> #include <string.h> +#include <sys/param.h> #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> @@ -35,12 +36,24 @@ #define SYS_POWER_STATE "/sys/power/state" #define SYS_POWER_WAKEUP_COUNT "/sys/power/wakeup_count" +#define BASE_SLEEP_TIME 100000 + static int state_fd; static int wakeup_count_fd; static pthread_t suspend_thread; static sem_t suspend_lockout; static const char *sleep_state = "mem"; static void (*wakeup_func)(bool success) = NULL; +static int sleep_time = BASE_SLEEP_TIME; + +static void update_sleep_time(bool success) { + if (success) { + sleep_time = BASE_SLEEP_TIME; + return; + } + // double sleep time after each failure up to one minute + sleep_time = MIN(sleep_time * 2, 60000000); +} static void *suspend_thread_func(void *arg __attribute__((unused))) { @@ -48,10 +61,12 @@ static void *suspend_thread_func(void *arg __attribute__((unused))) char wakeup_count[20]; int wakeup_count_len; int ret; - bool success; + bool success = true; while (1) { - usleep(100000); + update_sleep_time(success); + usleep(sleep_time); + success = false; ALOGV("%s: read wakeup_count\n", __func__); lseek(wakeup_count_fd, 0, SEEK_SET); wakeup_count_len = TEMP_FAILURE_RETRY(read(wakeup_count_fd, wakeup_count, @@ -75,7 +90,6 @@ static void *suspend_thread_func(void *arg __attribute__((unused))) continue; } - success = true; ALOGV("%s: write %*s to wakeup_count\n", __func__, wakeup_count_len, wakeup_count); ret = TEMP_FAILURE_RETRY(write(wakeup_count_fd, wakeup_count, wakeup_count_len)); if (ret < 0) { @@ -84,8 +98,8 @@ static void *suspend_thread_func(void *arg __attribute__((unused))) } else { ALOGV("%s: write %s to %s\n", __func__, sleep_state, SYS_POWER_STATE); ret = TEMP_FAILURE_RETRY(write(state_fd, sleep_state, strlen(sleep_state))); - if (ret < 0) { - success = false; + if (ret >= 0) { + success = true; } void (*func)(bool success) = wakeup_func; if (func != NULL) { |