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kernel: Update cpu_ent::active_time atomically

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This commit is contained in:
Pawel Dziepak 2013-10-23 21:56:14 +02:00
parent 453bf75027
commit d6efe8ee75
3 changed files with 4 additions and 9 deletions
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7
src/system/kernel/cpu.cpp
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@ -74,12 +74,7 @@ cpu_get_active_time(int32 cpu)
if (cpu < 0 || cpu > smp_get_num_cpus()) if (cpu < 0 || cpu > smp_get_num_cpus())
return 0; return 0;
// We need to grab the scheduler lock here, because the thread activity return atomic_get64(&gCPU[cpu].active_time);
// time is not maintained atomically (because there is no need to).
InterruptsSpinLocker schedulerLocker(gSchedulerLock);
return gCPU[cpu].active_time;
} }

2
src/system/kernel/scheduler/scheduler_affine.cpp
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@ -1213,7 +1213,7 @@ affine_track_cpu_activity(Thread* oldThread, Thread* nextThread, int32 thisCore)
= (oldThread->kernel_time - oldThread->cpu->last_kernel_time) = (oldThread->kernel_time - oldThread->cpu->last_kernel_time)
+ (oldThread->user_time - oldThread->cpu->last_user_time); + (oldThread->user_time - oldThread->cpu->last_user_time);
oldThread->cpu->active_time += active; atomic_add64(&oldThread->cpu->active_time, active);
sCoreEntries[thisCore].fActiveTime += active; sCoreEntries[thisCore].fActiveTime += active;
} }

4
src/system/kernel/scheduler/scheduler_simple.cpp
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@ -634,9 +634,9 @@ simple_reschedule(void)
// track CPU activity // track CPU activity
if (!thread_is_idle_thread(oldThread)) { if (!thread_is_idle_thread(oldThread)) {
oldThread->cpu->active_time += atomic_add64(&oldThread->cpu->active_time,
(oldThread->kernel_time - oldThread->cpu->last_kernel_time) (oldThread->kernel_time - oldThread->cpu->last_kernel_time)
+ (oldThread->user_time - oldThread->cpu->last_user_time); + (oldThread->user_time - oldThread->cpu->last_user_time));
} }
if (!thread_is_idle_thread(nextThread)) { if (!thread_is_idle_thread(nextThread)) {