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[CELL] spufs: integration of SPE affinity with the scheduller

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This patch makes the scheduller honor affinity information for each
context being scheduled. If the context has no affinity information,
behaviour is unchanged. If there are affinity information, context is
schedulled to be run on the exact spu recommended by the affinity
placement algorithm.

Signed-off-by: Andre Detsch <adetsch@br.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Arnd Bergmann 2007-07-20 21:39:49 +02:00 committed by Arnd Bergmann
parent c5fc8d2a92
commit cbc23d3e7c
2 changed files with 23 additions and 0 deletions
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19
arch/powerpc/platforms/cell/spu_base.c
View file

@ -425,6 +425,25 @@ static void spu_init_channels(struct spu *spu)
}
}
struct spu *spu_alloc_spu(struct spu *req_spu)
{
struct spu *spu, *ret = NULL;
mutex_lock(&spu_mutex);
list_for_each_entry(spu, &cbe_spu_info[req_spu->node].free_spus, list) {
if (spu == req_spu) {
list_del_init(&spu->list);
pr_debug("Got SPU %d %d\n", spu->number, spu->node);
spu_init_channels(spu);
ret = spu;
break;
}
}
mutex_unlock(&spu_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(spu_alloc_spu);
struct spu *spu_alloc_node(int node)
{
struct spu *spu = NULL;

4
arch/powerpc/platforms/cell/spufs/sched.c
View file

@ -507,6 +507,10 @@ static struct spu *spu_get_idle(struct spu_context *ctx)
int node = cpu_to_node(raw_smp_processor_id());
int n;
spu = affinity_check(ctx);
if (spu)
return spu_alloc_spu(spu);
for (n = 0; n < MAX_NUMNODES; n++, node++) {
node = (node < MAX_NUMNODES) ? node : 0;
if (!node_allowed(ctx, node))