From: Robert Richter <rric@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@infradead.org>,
Jiri Olsa <jolsa@redhat.com>,
linux-kernel@vger.kernel.org,
Robert Richter <robert.richter@linaro.org>,
Robert Richter <rric@kernel.org>
Subject: [PATCH v2 11/14] perf, persistent: Implementing a persistent pmu
Date: Tue, 11 Jun 2013 18:42:37 +0200 [thread overview]
Message-ID: <1370968960-22527-12-git-send-email-rric@kernel.org> (raw)
In-Reply-To: <1370968960-22527-1-git-send-email-rric@kernel.org>
From: Robert Richter <robert.richter@linaro.org>
We want to use the kernel's pmu design to later expose persistent
events via sysfs to userland. Initially implement a persistent pmu.
The format syntax is introduced allowing to set bits anywhere in
struct perf_event_attr. This is used in this case to set the
persistent flag (attr5:23). The syntax is attr<num> where num is the
index of the u64 array in struct perf_event_attr. Otherwise syntax is
same as for config<num>.
Patches that implement this functionality for perf tools are sent in a
separate patchset.
Signed-off-by: Robert Richter <robert.richter@linaro.org>
Signed-off-by: Robert Richter <rric@kernel.org>
---
kernel/events/persistent.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/kernel/events/persistent.c b/kernel/events/persistent.c
index 4fcd071..97c57c9 100644
--- a/kernel/events/persistent.c
+++ b/kernel/events/persistent.c
@@ -175,10 +175,45 @@ out:
return event_fd;
}
+PMU_FORMAT_ATTR(persistent, "attr5:23");
+
+static struct attribute *persistent_format_attrs[] = {
+ &format_attr_persistent.attr,
+ NULL,
+};
+
+static struct attribute_group persistent_format_group = {
+ .name = "format",
+ .attrs = persistent_format_attrs,
+};
+
+static const struct attribute_group *persistent_attr_groups[] = {
+ &persistent_format_group,
+ NULL,
+};
+
+static struct pmu persistent_pmu;
+
+static int persistent_pmu_init(struct perf_event *event)
+{
+ if (persistent_pmu.type != event->attr.type)
+ return -ENOENT;
+
+ /* Not a persistent event. */
+ return -EFAULT;
+}
+
+static struct pmu persistent_pmu = {
+ .event_init = persistent_pmu_init,
+ .attr_groups = persistent_attr_groups,
+};
+
void __init persistent_events_init(void)
{
int cpu;
+ perf_pmu_register(&persistent_pmu, "persistent", -1);
+
for_each_possible_cpu(cpu) {
INIT_LIST_HEAD(&per_cpu(pers_events, cpu));
mutex_init(&per_cpu(pers_events_lock, cpu));
--
1.8.1.1
next prev parent reply other threads:[~2013-06-11 16:43 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-11 16:42 [PATCH v2 00/14] perf, persistent: Kernel updates for perf tool integration Robert Richter
2013-06-11 16:42 ` [PATCH v2 01/14] perf, ring_buffer: Use same prefix Robert Richter
2013-06-11 16:42 ` [PATCH v2 02/14] perf: Add persistent events Robert Richter
2013-06-24 9:28 ` Peter Zijlstra
2013-06-24 19:24 ` Borislav Petkov
2013-06-25 8:46 ` Robert Richter
2013-06-11 16:42 ` [PATCH v2 03/14] perf: Add persistent event facilities Robert Richter
2013-06-14 2:15 ` Namhyung Kim
2013-06-14 7:20 ` Robert Richter
2013-06-24 9:32 ` Peter Zijlstra
2013-06-25 8:47 ` Robert Richter
2013-06-24 9:44 ` Peter Zijlstra
2013-06-25 8:41 ` Robert Richter
2013-06-24 9:48 ` Peter Zijlstra
2013-06-24 19:26 ` Borislav Petkov
2013-06-25 7:44 ` Peter Zijlstra
2013-06-25 9:24 ` Robert Richter
2013-06-25 9:37 ` Borislav Petkov
2013-06-25 10:51 ` Robert Richter
2013-06-25 15:29 ` Borislav Petkov
2013-06-25 16:14 ` Robert Richter
2013-06-11 16:42 ` [PATCH v2 04/14] MCE: Enable persistent event Robert Richter
2013-06-11 16:42 ` [PATCH v2 05/14] perf, persistent: Rework struct pers_event_desc Robert Richter
2013-06-11 16:42 ` [PATCH v2 06/14] perf, persistent: Remove rb_put() Robert Richter
2013-06-11 16:42 ` [PATCH v2 07/14] perf, persistent: Introduce get_persistent_event() Robert Richter
2013-06-11 16:42 ` [PATCH v2 08/14] perf, persistent: Reworking perf_get_persistent_event_fd() Robert Richter
2013-06-11 16:42 ` [PATCH v2 09/14] perf, persistent: Protect event lists with mutex Robert Richter
2013-06-11 16:42 ` [PATCH v2 10/14] perf, persistent: Avoid adding identical events Robert Richter
2013-06-11 16:42 ` Robert Richter [this message]
2013-06-11 16:42 ` [PATCH v2 12/14] perf, persistent: Name each persistent event Robert Richter
2013-06-11 16:42 ` [PATCH v2 13/14] perf, persistent: Exposing persistent events using sysfs Robert Richter
2013-06-14 2:36 ` Namhyung Kim
2013-06-14 8:57 ` Robert Richter
2013-06-11 16:42 ` [PATCH v2 14/14] perf, persistent: Allow multiple users for an event Robert Richter
2013-06-24 10:08 ` [PATCH v2 00/14] perf, persistent: Kernel updates for perf tool integration Peter Zijlstra
2013-06-25 10:46 ` Robert Richter
2013-06-24 10:22 ` Peter Zijlstra
2013-06-25 16:56 ` Robert Richter
2013-06-24 10:24 ` Peter Zijlstra
2013-06-24 15:25 ` Peter Zijlstra
2013-06-24 19:45 ` Ingo Molnar
2013-06-25 17:57 ` Robert Richter
2013-06-25 19:16 ` Borislav Petkov
2013-06-26 8:12 ` Robert Richter
2013-06-26 8:24 ` Borislav Petkov
2013-06-26 9:46 ` Ingo Molnar
2013-06-26 9:56 ` Borislav Petkov
2013-06-26 10:11 ` Robert Richter
2013-06-26 11:45 ` Ingo Molnar
2013-06-26 12:25 ` Ingo Molnar
2013-06-26 12:44 ` Robert Richter
2013-06-27 5:46 ` Namhyung Kim
2013-06-27 8:35 ` Borislav Petkov
2013-06-27 8:50 ` Ingo Molnar
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