From: Arnd Bergmann Date: Fri, 20 Jul 2007 19:39:49 +0000 (+0200) Subject: [CELL] spufs: integration of SPE affinity with the scheduller X-Git-Tag: v3.12-rc1~27789^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cbc23d3e7cb3c9fd3c9fce0bc3f44f687a9517c0;p=kernel%2Fkernel-generic.git [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 Signed-off-by: Arnd Bergmann --- 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))