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From: Maynard Johnson <maynardj@us.ibm.com>
To: cbe-oss-dev@ozlabs.org, linux-kernel@vger.kernel.org,
	linuxppc-dev@ozlabs.org, oprofile-list@lists.sourceforge.net
Subject: Re: [PATCH]Add notification for active Cell SPU tasks -- updated patch
Date: Fri, 08 Dec 2006 09:51:11 -0600	[thread overview]
Message-ID: <457989EF.10805@us.ibm.com> (raw)

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[-- Attachment #2: spu-notifier.patch --]
[-- Type: text/x-diff, Size: 1808 bytes --]

Subject: Enable SPU switch notification to detect currently active SPU tasks.

From: Maynard Johnson <maynardj@us.ibm.com>

This patch adds to the capability of spu_switch_event_register to notify the
caller of currently active SPU tasks.  It also exports spu_switch_event_register
and spu_switch_event_unregister.

Signed-off-by: Maynard Johnson <mpjohn@us.ibm.com>


Index: linux-2.6.19-rc6-arnd1+patches/arch/powerpc/platforms/cell/spufs/sched.c
===================================================================
--- linux-2.6.19-rc6-arnd1+patches.orig/arch/powerpc/platforms/cell/spufs/sched.c	2006-12-04 10:56:04.730698720 -0600
+++ linux-2.6.19-rc6-arnd1+patches/arch/powerpc/platforms/cell/spufs/sched.c	2006-12-08 09:04:40.558774376 -0600
@@ -84,15 +84,36 @@
 			    ctx ? ctx->object_id : 0, spu);
 }
 
+static void notify_spus_active(struct notifier_block * n)
+{
+	int node;
+	for (node = 0; node < MAX_NUMNODES; 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;
+				 n->notifier_call(n, ctx ? ctx->object_id : 0, spu);
+		}
+		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(n);
+	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);
 
 
 static inline void bind_context(struct spu *spu, struct spu_context *ctx)

             reply	other threads:[~2006-12-08 15:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-12-08 15:51 Maynard Johnson [this message]
2007-01-09  0:47 ` [Cbe-oss-dev] [PATCH -- RFC]Add notification for active Cell SPU tasks -- update #2 Maynard Johnson
2007-01-12 22:00   ` Maynard Johnson

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