diff options
| author | Maxim Shchetynin <maxim@de.ibm.com> | 2008-07-05 05:05:39 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-09 16:30:42 +1000 |
| commit | fabb657005edbbcb0d13ee49a40f1f4b042a1d19 (patch) | |
| tree | 5f402e272ff2933c9e3fe9d6e0eeb10c166d7c2c | |
| parent | 88b90c96b787ecb5c72384b6873468f814cce650 (diff) | |
powerpc/spufs: add atomic busy_spus counter to struct cbe_spu_info
As nr_active counter includes also spus waiting for syscalls to return
we need a seperate counter that only counts spus that are currently running
on spu side. This counter shall be used by a cpufreq governor that targets
a frequency dependent from the number of running spus.
Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/sched.c | 6 | ||||
| -rw-r--r-- | include/asm-powerpc/spu.h | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c index afb92d4fbcf..34654743363 100644 --- a/arch/powerpc/platforms/cell/spufs/sched.c +++ b/arch/powerpc/platforms/cell/spufs/sched.c @@ -994,6 +994,7 @@ void spuctx_switch_state(struct spu_context *ctx, struct timespec ts; struct spu *spu; enum spu_utilization_state old_state; + int node; ktime_get_ts(&ts); curtime = timespec_to_ns(&ts); @@ -1015,6 +1016,11 @@ void spuctx_switch_state(struct spu_context *ctx, spu->stats.times[old_state] += delta; spu->stats.util_state = new_state; spu->stats.tstamp = curtime; + node = spu->node; + if (old_state == SPU_UTIL_USER) + atomic_dec(&cbe_spu_info[node].busy_spus); + if (new_state == SPU_UTIL_USER); + atomic_inc(&cbe_spu_info[node].busy_spus); } } diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h index 99348c1f4ca..8b2eb044270 100644 --- a/include/asm-powerpc/spu.h +++ b/include/asm-powerpc/spu.h @@ -191,6 +191,7 @@ struct cbe_spu_info { struct list_head spus; int n_spus; int nr_active; + atomic_t busy_spus; atomic_t reserved_spus; }; |