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scheduler: Protect package data with rw_spinlock

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This commit is contained in:
Pawel Dziepak 2013-11-27 04:57:26 +01:00
parent 9caf7f4fb9
commit 87115715b4
4 changed files with 12 additions and 18 deletions
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4
src/system/kernel/scheduler/low_latency.cpp
View File

@ -63,7 +63,7 @@ choose_core(Thread* thread)
{
CoreEntry* entry = NULL;
SpinLocker locker(gIdlePackageLock);
ReadSpinLocker locker(gIdlePackageLock);
// wake new package
PackageEntry* package = gIdlePackageList->Last();
if (package == NULL) {
@ -73,7 +73,7 @@ choose_core(Thread* thread)
locker.Unlock();
if (package != NULL) {
SpinLocker _(package->fCoreLock);
ReadSpinLocker _(package->fCoreLock);
entry = package->fIdleCores.Last();
}

4
src/system/kernel/scheduler/power_saving.cpp
View File

@ -89,12 +89,12 @@ choose_idle_core(void)
}
if (current == NULL) {
SpinLocker _(gIdlePackageLock);
ReadSpinLocker _(gIdlePackageLock);
current = gIdlePackageList->Last();
}
if (current != NULL) {
SpinLocker _(current->fCoreLock);
ReadSpinLocker _(current->fCoreLock);
return current->fIdleCores.Last();
}

18
src/system/kernel/scheduler/scheduler.cpp
View File

@ -66,7 +66,7 @@ int32 gCoreCount;
PackageEntry* gPackageEntries;
IdlePackageList* gIdlePackageList;
spinlock gIdlePackageLock = B_SPINLOCK_INITIALIZER;
rw_spinlock gIdlePackageLock = B_RW_SPINLOCK_INITIALIZER;
int32 gPackageCount;
ThreadRunQueue* gRunQueues;
@ -132,7 +132,7 @@ PackageEntry::PackageEntry()
fIdleCoreCount(0),
fCoreCount(0)
{
B_INITIALIZE_SPINLOCK(&fCoreLock);
B_INITIALIZE_RW_SPINLOCK(&fCoreLock);
}
@ -457,7 +457,7 @@ update_cpu_priority(int32 cpu, int32 priority)
int32 package = gCPUToPackage[cpu];
PackageEntry* packageEntry = &gPackageEntries[package];
if (maxPriority == B_IDLE_PRIORITY) {
SpinLocker _(packageEntry->fCoreLock);
WriteSpinLocker _(packageEntry->fCoreLock);
// core goes idle
ASSERT(packageEntry->fIdleCoreCount >= 0);
@ -468,11 +468,11 @@ update_cpu_priority(int32 cpu, int32 priority)
if (packageEntry->fIdleCoreCount == packageEntry->fCoreCount) {
// package goes idle
SpinLocker _(gIdlePackageLock);
WriteSpinLocker _(gIdlePackageLock);
gIdlePackageList->Add(packageEntry);
}
} else if (corePriority == B_IDLE_PRIORITY) {
SpinLocker _(packageEntry->fCoreLock);
WriteSpinLocker _(packageEntry->fCoreLock);
// core wakes up
ASSERT(packageEntry->fIdleCoreCount > 0);
@ -483,7 +483,7 @@ update_cpu_priority(int32 cpu, int32 priority)
if (packageEntry->fIdleCoreCount + 1 == packageEntry->fCoreCount) {
// package wakes up
SpinLocker _(gIdlePackageLock);
WriteSpinLocker _(gIdlePackageLock);
gIdlePackageList->Remove(packageEntry);
}
}
@ -956,9 +956,6 @@ choose_next_thread(int32 thisCPU, Thread* oldThread, bool putAtBack)
static inline void
track_cpu_activity(Thread* oldThread, Thread* nextThread, int32 thisCore)
{
bigtime_t now = system_time();
bigtime_t usedTime = now - oldThread->scheduler_data->quantum_start;
if (!thread_is_idle_thread(oldThread)) {
bigtime_t active
= (oldThread->kernel_time - oldThread->cpu->last_kernel_time)
@ -976,9 +973,6 @@ track_cpu_activity(Thread* oldThread, Thread* nextThread, int32 thisCore)
if (!gSingleCore && !gCPU[smp_get_current_cpu()].disabled)
compute_cpu_load(smp_get_current_cpu());
int32 oldPriority = get_effective_priority(oldThread);
int32 nextPriority = get_effective_priority(nextThread);
if (!thread_is_idle_thread(nextThread)) {
oldThread->cpu->last_kernel_time = nextThread->kernel_time;
oldThread->cpu->last_user_time = nextThread->user_time;

4
src/system/kernel/scheduler/scheduler_common.h
View File

@ -106,7 +106,7 @@ struct PackageEntry : public DoublyLinkedListLinkImpl<PackageEntry> {
int32 fPackageID;
spinlock fCoreLock;
rw_spinlock fCoreLock;
DoublyLinkedList<CoreEntry> fIdleCores;
int32 fIdleCoreCount;
@ -117,7 +117,7 @@ typedef DoublyLinkedList<PackageEntry> IdlePackageList;
extern PackageEntry* gPackageEntries;
extern IdlePackageList* gIdlePackageList;
extern spinlock gIdlePackageLock;
extern rw_spinlock gIdlePackageLock;
extern int32 gPackageCount;
// The run queues. Holds the threads ready to run ordered by priority.