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authorAndre Detsch <adetsch@br.ibm.com>2008-07-24 11:01:54 +1000
committerJeremy Kerr <jk@ozlabs.org>2008-07-24 11:01:54 +1000
commitad1ede127760d6ca4903f44dfe1a8a38b3bfb36c (patch)
treeeee2926eecc05d7cc22edda1535e9b9b03b9a401 /arch
parent0855b543222e79cbbd9d66dd56cb54740e7d524f (diff)
downloadop-kernel-dev-ad1ede127760d6ca4903f44dfe1a8a38b3bfb36c.zip
op-kernel-dev-ad1ede127760d6ca4903f44dfe1a8a38b3bfb36c.tar.gz
powerpc/spufs: better placement of spu affinity reference context
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/cell/spufs/sched.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index f293963..2deeeba 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -312,11 +312,28 @@ 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)) {
mutex_unlock(&cbe_spu_info[node].list_mutex);
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