From: Peter Zijlstra <peterz@infradead.org>
To: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, Robert Richter <rric@kernel.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Mike Galbraith <efault@gmx.de>, Paul Mackerras <paulus@samba.org>,
Stephane Eranian <eranian@google.com>,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [RFC v2 6/7] perf: add api for pmus to write to AUX space
Date: Tue, 24 Jun 2014 19:27:23 +0200 [thread overview]
Message-ID: <20140624172723.GS3213@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1402501310-31940-7-git-send-email-alexander.shishkin@linux.intel.com>
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On Wed, Jun 11, 2014 at 06:41:49PM +0300, Alexander Shishkin wrote:
> +void perf_aux_output_end(struct perf_output_handle *handle, unsigned long size,
> + bool truncated)
> +{
> + struct ring_buffer *rb = handle->rb;
> + unsigned long aux_head;
> +
> + aux_head = local_read(&rb->aux_head);
> + local_add(size, &rb->aux_head);
> +
> + rb->user_page->aux_head = local_read(&rb->aux_head);
> + smp_wmb();
> +
> + perf_output_wakeup(handle);
> + handle->event = NULL;
> +
> + ring_buffer_put(rb);
> +}
This thing is distinctly less complex than perf_output_put_handle().. ?
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next prev parent reply other threads:[~2014-06-24 17:27 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-11 15:41 [RFC v2 0/7] perf: perf: add AUX space to ring_buffer Alexander Shishkin
2014-06-11 15:41 ` [RFC v2 1/7] perf: add data_{offset,size} to user_page Alexander Shishkin
2014-06-13 13:51 ` Robert Richter
2014-06-11 15:41 ` [RFC v2 2/7] perf: add AUX area to ring buffer for raw data streams Alexander Shishkin
2014-06-24 17:19 ` Peter Zijlstra
2014-06-25 11:09 ` Alexander Shishkin
2014-06-25 12:11 ` Peter Zijlstra
2014-06-11 15:41 ` [RFC v2 3/7] perf: support high-order allocations for AUX space Alexander Shishkin
2014-06-11 15:41 ` [RFC v2 4/7] perf: add a capability for AUX_NO_SG pmus to do software double buffering Alexander Shishkin
2014-06-11 15:41 ` [RFC v2 5/7] perf: add a pmu capability for "exclusive" events Alexander Shishkin
2014-06-24 17:18 ` Peter Zijlstra
2014-06-25 11:12 ` Alexander Shishkin
2014-06-11 15:41 ` [RFC v2 6/7] perf: add api for pmus to write to AUX space Alexander Shishkin
2014-06-24 17:27 ` Peter Zijlstra [this message]
2014-06-25 11:24 ` Alexander Shishkin
2014-06-25 12:12 ` Peter Zijlstra
2014-06-11 15:41 ` [RFC v2 7/7] perf: add AUX record Alexander Shishkin
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