From: Alexander Shishkin <alexander.shishkin@linux.intel.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
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>,
kan.liang@intel.com,
Alexander Shishkin <alexander.shishkin@linux.intel.com>
Subject: [PATCH v3 06/23] perf: Redirect output from inherited events to parents
Date: Mon, 11 Aug 2014 08:19:35 +0300 [thread overview]
Message-ID: <1407734392-31097-7-git-send-email-alexander.shishkin@linux.intel.com> (raw)
In-Reply-To: <1407734392-31097-1-git-send-email-alexander.shishkin@linux.intel.com>
In order to collect AUX data from an inherited event, we can redirect its
output to parent's ring buffer if possible (they must be cpu affine). This
patch adds set_output() to the inheritance path.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
---
kernel/events/core.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 361a45eee2..55cd524564 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7859,6 +7859,12 @@ inherit_event(struct perf_event *parent_event,
= parent_event->overflow_handler_context;
/*
+ * Direct child's output to parent's ring buffer (if any)
+ */
+ if (parent_event->cpu != -1)
+ (void)perf_event_set_output(child_event, parent_event);
+
+ /*
* Precalculate sample_data sizes
*/
perf_event__header_size(child_event);
--
2.1.0.rc1
next prev parent reply other threads:[~2014-08-11 5:29 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-11 5:19 [PATCH v3 00/23] perf: Add infrastructure and support for Intel PT Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 01/23] perf: Add data_{offset,size} to user_page Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 02/23] perf: Add AUX area to ring buffer for raw data streams Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 03/23] perf: Support high-order allocations for AUX space Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 04/23] perf: Add a capability for AUX_NO_SG pmus to do software double buffering Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 05/23] perf: Add a pmu capability for "exclusive" events Alexander Shishkin
2014-08-11 5:19 ` Alexander Shishkin [this message]
2014-08-11 5:19 ` [PATCH v3 07/23] perf: Add api for pmus to write to AUX space Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 08/23] perf: Add AUX record Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 09/23] perf: Support overwrite mode for AUX area Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 10/23] perf: Add wakeup watermark control to " Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 11/23] perf: Add itrace_config to the event attribute Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 12/23] perf: add ITRACE_START record to indicate that tracing has started Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 13/23] x86: Add Intel Processor Trace (INTEL_PT) cpu feature detection Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 14/23] x86: perf: Intel PT and LBR/BTS are mutually exclusive Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 15/23] x86: perf: intel_pt: Intel PT PMU driver Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 16/23] x86: perf: intel_bts: Add BTS " Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 17/23] perf: Add rb_{alloc,free}_kernel api Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 18/23] perf: Add a helper to copy AUX data in the kernel Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 19/23] perf: Add a helper for looking up pmus by type Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 20/23] perf: itrace: Infrastructure for sampling instruction flow traces Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 21/23] perf: Allocate ring buffers for inherited per-task kernel events Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 22/23] perf: itrace: Allow itrace sampling for multiple events Alexander Shishkin
2014-08-11 5:19 ` [PATCH v3 23/23] perf: itrace: Allow sampling of inherited events Alexander Shishkin
2014-08-11 5:46 ` [PATCH v3 00/23] perf: Add infrastructure and support for Intel PT Ingo Molnar
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