diff options
Diffstat (limited to 'libs/utils/Threads.cpp')
| -rw-r--r-- | libs/utils/Threads.cpp | 46 |
1 files changed, 38 insertions, 8 deletions
diff --git a/libs/utils/Threads.cpp b/libs/utils/Threads.cpp index 2b1f49044d34..f6c55e4d89de 100644 --- a/libs/utils/Threads.cpp +++ b/libs/utils/Threads.cpp @@ -21,6 +21,7 @@ #include <utils/Log.h> #include <cutils/sched_policy.h> +#include <cutils/properties.h> #include <stdio.h> #include <stdlib.h> @@ -57,13 +58,27 @@ using namespace android; // ---------------------------------------------------------------------------- /* - * Create and run a new thead. + * Create and run a new thread. * * We create it "detached", so it cleans up after itself. */ typedef void* (*android_pthread_entry)(void*); +static pthread_once_t gDoSchedulingGroupOnce = PTHREAD_ONCE_INIT; +static bool gDoSchedulingGroup = true; + +static void checkDoSchedulingGroup(void) { + char buf[PROPERTY_VALUE_MAX]; + int len = property_get("debug.sys.noschedgroups", buf, ""); + if (len > 0) { + int temp; + if (sscanf(buf, "%d", &temp) == 1) { + gDoSchedulingGroup = temp == 0; + } + } +} + struct thread_data_t { thread_func_t entryFunction; void* userData; @@ -79,6 +94,15 @@ struct thread_data_t { char * name = t->threadName; delete t; setpriority(PRIO_PROCESS, 0, prio); + pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); + if (gDoSchedulingGroup) { + if (prio >= ANDROID_PRIORITY_BACKGROUND) { + set_sched_policy(androidGetTid(), SP_BACKGROUND); + } else { + set_sched_policy(androidGetTid(), SP_FOREGROUND); + } + } + if (name) { #if defined(HAVE_PRCTL) // Mac OS doesn't have this, and we build libutil for the host too @@ -287,9 +311,12 @@ int androidSetThreadSchedulingGroup(pid_t tid, int grp) } #if defined(HAVE_PTHREADS) - if (set_sched_policy(tid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ? - SP_BACKGROUND : SP_FOREGROUND)) { - return PERMISSION_DENIED; + pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); + if (gDoSchedulingGroup) { + if (set_sched_policy(tid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ? + SP_BACKGROUND : SP_FOREGROUND)) { + return PERMISSION_DENIED; + } } #endif @@ -303,10 +330,13 @@ int androidSetThreadPriority(pid_t tid, int pri) #if defined(HAVE_PTHREADS) int lasterr = 0; - if (pri >= ANDROID_PRIORITY_BACKGROUND) { - rc = set_sched_policy(tid, SP_BACKGROUND); - } else if (getpriority(PRIO_PROCESS, tid) >= ANDROID_PRIORITY_BACKGROUND) { - rc = set_sched_policy(tid, SP_FOREGROUND); + pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); + if (gDoSchedulingGroup) { + if (pri >= ANDROID_PRIORITY_BACKGROUND) { + rc = set_sched_policy(tid, SP_BACKGROUND); + } else if (getpriority(PRIO_PROCESS, tid) >= ANDROID_PRIORITY_BACKGROUND) { + rc = set_sched_policy(tid, SP_FOREGROUND); + } } if (rc) { |