diff options
| author | Bob Nelson <rrnelson@linux.vnet.ibm.com> | 2007-07-20 21:39:52 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@klappe.arndb.de> | 2007-07-20 21:42:20 +0200 |
| commit | 36aaccc1e96481e8310b1d13600096da0f24ff43 (patch) | |
| tree | 2726a068ae0d4529ccde030136255abbd1b1e069 /arch/powerpc/platforms/cell/spufs/sched.c | |
| parent | 2414059420311e5384de646eebfd529c184afd3c (diff) | |
[CELL] oprofile: enable SPU switch notification to detect currently active SPU tasks
From: Maynard Johnson <mpjohn@us.ibm.com>
This patch adds to the capability of spu_switch_event_register so that
the caller is also notified of currently active SPU tasks.
Exports spu_switch_event_register and spu_switch_event_unregister so
that OProfile can get access to the notifications provided.
Signed-off-by: Maynard Johnson <mpjohn@us.ibm.com>
Signed-off-by: Carl Love <carll@us.ibm.com>
Signed-off-by: Bob Nelson <rrnelson@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/sched.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/sched.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c index 49b8f6867a9..88ec333e90d 100644 --- a/arch/powerpc/platforms/cell/spufs/sched.c +++ b/arch/powerpc/platforms/cell/spufs/sched.c @@ -204,21 +204,51 @@ static void spu_remove_from_active_list(struct spu *spu) static BLOCKING_NOTIFIER_HEAD(spu_switch_notifier); -static void spu_switch_notify(struct spu *spu, struct spu_context *ctx) +void spu_switch_notify(struct spu *spu, struct spu_context *ctx) { blocking_notifier_call_chain(&spu_switch_notifier, ctx ? ctx->object_id : 0, spu); } +static void notify_spus_active(void) +{ + int node; + + /* + * Wake up the active spu_contexts. + * + * When the awakened processes see their "notify_active" flag is set, + * they will call spu_switch_notify(); + */ + for_each_online_node(node) { + struct spu *spu; + mutex_lock(&spu_prio->active_mutex[node]); + list_for_each_entry(spu, &spu_prio->active_list[node], list) { + struct spu_context *ctx = spu->ctx; + set_bit(SPU_SCHED_NOTIFY_ACTIVE, &ctx->sched_flags); + mb(); /* make sure any tasks woken up below */ + /* can see the bit(s) set above */ + wake_up_all(&ctx->stop_wq); + } + mutex_unlock(&spu_prio->active_mutex[node]); + } +} + int spu_switch_event_register(struct notifier_block * n) { - return blocking_notifier_chain_register(&spu_switch_notifier, n); + int ret; + ret = blocking_notifier_chain_register(&spu_switch_notifier, n); + if (!ret) + notify_spus_active(); + return ret; } +EXPORT_SYMBOL_GPL(spu_switch_event_register); int spu_switch_event_unregister(struct notifier_block * n) { return blocking_notifier_chain_unregister(&spu_switch_notifier, n); } +EXPORT_SYMBOL_GPL(spu_switch_event_unregister); /** * spu_bind_context - bind spu context to physical spu |