From 7a2142002f29a7b398c49da9bdec712dc57087c7 Mon Sep 17 00:00:00 2001 From: Luke Browning Date: Mon, 28 Apr 2008 14:32:34 +1000 Subject: [POWERPC] spufs: try to route SPU interrupts to local node Currently, we re-route SPU interrupts to the current cpu, which may be on a remote node. In the case of time slicing, all spu interrupts will end up routed to the same cpu, where the spusched_tick occurs. This change routes mfc interrupts to the cpu where the controlling thread last ran, provided that cpu is on the same node as the spu (otherwise don't reroute interrupts). This should improve performance and provide a more predictable environment for processing spu exceptions. In the past we have seen concurrent delivery of spu exceptions to two cpus. This eliminates that concern. Signed-off-by: Luke Browning Signed-off-by: Jeremy Kerr --- arch/powerpc/platforms/cell/spufs/sched.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/platforms/cell/spufs/sched.c') diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c index 62280c292aac..1df7d6d152c7 100644 --- a/arch/powerpc/platforms/cell/spufs/sched.c +++ b/arch/powerpc/platforms/cell/spufs/sched.c @@ -140,6 +140,9 @@ void __spu_update_sched_info(struct spu_context *ctx) * if it is timesliced or preempted. */ ctx->cpus_allowed = current->cpus_allowed; + + /* Save the current cpu id for spu interrupt routing. */ + ctx->last_ran = raw_smp_processor_id(); } void spu_update_sched_info(struct spu_context *ctx) @@ -243,7 +246,6 @@ static void spu_bind_context(struct spu *spu, struct spu_context *ctx) spu_switch_log_notify(spu, ctx, SWITCH_LOG_START, 0); spu_restore(&ctx->csa, spu); spu->timestamp = jiffies; - spu_cpu_affinity_set(spu, raw_smp_processor_id()); spu_switch_notify(spu, ctx); ctx->state = SPU_STATE_RUNNABLE; -- cgit v1.2.3