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| author | Christoph Hellwig <hch@lst.de> | 2007-06-29 10:57:51 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-07-03 15:24:44 +1000 |
| commit | 379018022071489a7dffee74db2a267465dab561 (patch) | |
| tree | 7f8f0ce614c827e637a71a414308f1dee06fc452 /arch/powerpc/platforms/cell/spufs/run.c | |
| parent | be7031773eded128675de6da778234a935c8d8ea (diff) | |
| download | kernel-common-379018022071489a7dffee74db2a267465dab561.tar.gz kernel-common-379018022071489a7dffee74db2a267465dab561.tar.bz2 kernel-common-379018022071489a7dffee74db2a267465dab561.zip | |
[POWERPC] spusched: Switch from workqueues to kthread + timer tick
Get rid of the scheduler workqueues that complicated things a lot to
a dedicated spu scheduler thread that gets woken by a traditional
scheduler tick. By default this scheduler tick runs a HZ * 10, aka
one spu scheduler tick for every 10 cpu ticks.
Currently the tick is not disabled when we have less context than
available spus, but I will implement this later.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/run.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/run.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c index 3ba30cea764a..89b02b6bfc55 100644 --- a/arch/powerpc/platforms/cell/spufs/run.c +++ b/arch/powerpc/platforms/cell/spufs/run.c @@ -144,7 +144,6 @@ static int spu_run_init(struct spu_context *ctx, u32 * npc) ctx->ops->runcntl_write(ctx, runcntl); } else { unsigned long mode = SPU_PRIVCNTL_MODE_NORMAL; - spu_start_tick(ctx); ctx->ops->npc_write(ctx, *npc); if (test_thread_flag(TIF_SINGLESTEP)) mode = SPU_PRIVCNTL_MODE_SINGLE_STEP; @@ -160,7 +159,6 @@ static int spu_run_fini(struct spu_context *ctx, u32 * npc, { int ret = 0; - spu_stop_tick(ctx); *status = ctx->ops->status_read(ctx); *npc = ctx->ops->npc_read(ctx); spu_release(ctx); @@ -330,10 +328,8 @@ long spufs_run_spu(struct file *file, struct spu_context *ctx, if (unlikely(ctx->state != SPU_STATE_RUNNABLE)) { ret = spu_reacquire_runnable(ctx, npc, &status); - if (ret) { - spu_stop_tick(ctx); + if (ret) goto out2; - } continue; } ret = spu_process_events(ctx); |