Messages in this thread | | | Date | Mon, 04 Dec 2006 09:36:25 -0600 | From | Maynard Johnson <> | Subject | Re: [Cbe-oss-dev] [PATCH]Add notification for active Cell SPU tasks |
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Arnd Bergmann wrote: > On Friday 01 December 2006 21:01, Maynard Johnson wrote: > >>+static void notify_spus_active(void) >>+{ >>+ 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; >>+ blocking_notifier_call_chain(&spu_switch_notifier, >>+ ctx ? ctx->object_id : 0, spu); >>+ } >>+ mutex_unlock(&spu_prio->active_mutex[node]); >>+ } > > > I wonder if this is enough for oprofile. Don't you need to access user > space data of the task running on the SPU? I always assumed you want No, I don't need anything from the user app besides access to the executable binary, which I get with copy_from_user, specifying the 'objectid' as from address. > to do it via get_user or copy_from_user, which obviously doesn't work > here, when you're running in the oprofile task. Are you using something > like access_process_vm now? > > Arnd <><
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