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powerpc/spufs: better placement of spu affinity reference context

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This patch adjusts the placement of a reference context from
a spu affinity chain. The reference context can now be placed
only on nodes that have enough spus not intended to be used by
another gang (already running on the node).

Signed-off-by: Andre Detsch <adetsch@br.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
This commit is contained in:
Andre Detsch 2008-07-24 11:01:54 +10:00 committed by Jeremy Kerr
parent 0855b54322
commit ad1ede1277
1 changed files with 17 additions and 0 deletions
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17
arch/powerpc/platforms/cell/spufs/sched.c
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@ -312,10 +312,27 @@ static struct spu *aff_ref_location(struct spu_context *ctx, int mem_aff,
*/
node = cpu_to_node(raw_smp_processor_id());
for (n = 0; n < MAX_NUMNODES; n++, node++) {
int available_spus;
node = (node < MAX_NUMNODES) ? node : 0;
if (!node_allowed(ctx, node))
continue;
available_spus = 0;
mutex_lock(&cbe_spu_info[node].list_mutex);
list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
if (spu->ctx && spu->ctx->gang
&& spu->ctx->aff_offset == 0)
available_spus -=
(spu->ctx->gang->contexts - 1);
else
available_spus++;
}
if (available_spus < ctx->gang->contexts) {
mutex_unlock(&cbe_spu_info[node].list_mutex);
continue;
}
list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
if ((!mem_aff || spu->has_mem_affinity) &&
sched_spu(spu)) {