From 9d78592ed72dbff1d8825207f8def07858a49768 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 25 Jul 2007 21:31:09 +1000 Subject: [PATCH] [POWERPC] spusched: Fix initial timeslice calculation Currently we calculate the first timeslice for every context incorrectly - alloc_spu_context calls spu_set_timeslice before we set ctx->prio so we always calculate the longest possible timeslice for the lowest possible priority. This patch makes sure to update the schedule-related fields before calculating the timeslice and also makes sure we update the timeslice for a non-running context when entering spu_run so a priority change affects the context as soon as possible. Signed-off-by: Christoph Hellwig Signed-off-by: Jeremy Kerr Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/cell/spufs/context.c | 3 ++- arch/powerpc/platforms/cell/spufs/run.c | 4 ++++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/cell/spufs/context.c b/arch/powerpc/platforms/cell/spufs/context.c index 6694f86d7000..9cb081c26e71 100644 --- a/arch/powerpc/platforms/cell/spufs/context.c +++ b/arch/powerpc/platforms/cell/spufs/context.c @@ -59,7 +59,8 @@ struct spu_context *alloc_spu_context(struct spu_gang *gang) INIT_LIST_HEAD(&ctx->aff_list); if (gang) spu_gang_add_ctx(gang, ctx); - ctx->cpus_allowed = current->cpus_allowed; + + __spu_update_sched_info(ctx); spu_set_timeslice(ctx); ctx->stats.util_state = SPU_UTIL_IDLE_LOADED; diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c index 0b50fa5cb39d..6abdd8fe2098 100644 --- a/arch/powerpc/platforms/cell/spufs/run.c +++ b/arch/powerpc/platforms/cell/spufs/run.c @@ -312,6 +312,7 @@ long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *event) spu_acquire(ctx); if (ctx->state == SPU_STATE_SAVED) { __spu_update_sched_info(ctx); + spu_set_timeslice(ctx); ret = spu_activate(ctx, 0); if (ret) { @@ -322,6 +323,9 @@ long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *event) /* * We have to update the scheduling priority under active_mutex * to protect against find_victim(). + * + * No need to update the timeslice ASAP, it will get updated + * once the current one has expired. */ spu_update_sched_info(ctx); } -- 2.39.2