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scheduler_affine: Remove old code

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This commit is contained in:
Pawel Dziepak 2013-10-22 01:21:51 +02:00
parent 2e0ee59462
commit f823aacf59
1 changed files with 0 additions and 52 deletions
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52
src/system/kernel/scheduler/scheduler_affine.cpp
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@ -882,58 +882,6 @@ affine_put_back(Thread* thread)
}
#if 0
/*! Looks for a possible thread to grab/run from another CPU.
Note: thread lock must be held when entering this function
*/
static Thread *
steal_thread_from_other_cpus(int32 currentCPU)
{
// look through the active CPUs - find the one
// that has a) threads available to steal, and
// b) out of those, the one that's the most CPU-bound
// TODO: make this more intelligent along with enqueue
// - we need to try and maintain a reasonable balance
// in run queue sizes across CPUs, and also try to maintain
// an even distribution of cpu bound / interactive threads
int32 targetCPU = -1;
for (int32 i = 0; i < smp_get_num_cpus(); i++) {
// skip CPUs that have either no or only one thread
if (i == currentCPU || sRunQueueSize[i] < 2)
continue;
// out of the CPUs with threads available to steal,
// pick whichever one is generally the most CPU bound.
if (targetCPU < 0
|| sRunQueue[i]->priority > sRunQueue[targetCPU]->priority
|| (sRunQueue[i]->priority == sRunQueue[targetCPU]->priority
&& sRunQueueSize[i] > sRunQueueSize[targetCPU]))
targetCPU = i;
}
if (targetCPU < 0)
return NULL;
Thread* nextThread = sRunQueue[targetCPU];
Thread* prevThread = NULL;
while (nextThread != NULL) {
// grab the highest priority non-pinned thread
// out of this CPU's queue, dequeue and return it
if (nextThread->pinned_to_cpu <= 0) {
dequeue_from_run_queue(prevThread, targetCPU);
return nextThread;
}
prevThread = nextThread;
nextThread = nextThread->queue_next;
}
return NULL;
}
#endif
/*! Sets the priority of a thread.
Note: thread lock must be held when entering this function
*/