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authorArnd Bergmann <arnd@arndb.de>2007-07-20 21:39:49 +0200
committerArnd Bergmann <arnd@klappe.arndb.de>2007-07-20 21:42:18 +0200
commitcbc23d3e7cb3c9fd3c9fce0bc3f44f687a9517c0 (patch)
tree4adcbbfa5402e46c816788cd86f992082d2a6f61
parentc5fc8d2a92461fcabd00dfd678204cba36b93119 (diff)
downloadop-kernel-dev-cbc23d3e7cb3c9fd3c9fce0bc3f44f687a9517c0.zip
op-kernel-dev-cbc23d3e7cb3c9fd3c9fce0bc3f44f687a9517c0.tar.gz
[CELL] spufs: integration of SPE affinity with the scheduller
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>
-rw-r--r--arch/powerpc/platforms/cell/spu_base.c19
-rw-r--r--arch/powerpc/platforms/cell/spufs/sched.c4
2 files changed, 23 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 75b5af0..5f39931 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -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;
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index a9569de..49b8f68 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -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))
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