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Groups > linux.kernel > #1390751
| From | David Carrillo-Cisneros <davidcc@google.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 15/32] perf/core: add hooks to expose architecture specific features in perf_cgroup |
| Date | 2016-04-29 07:00 +0200 |
| Message-ID | <rt8H0-8vJ-15@gated-at.bofh.it> (permalink) |
| References | <rt8xj-8qy-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
The hooks allows architectures to extend the behavior of the
perf subsystem.
In this patch series, the hooks will be used by Intel's CQM PMU to
provide support for the llc_occupancy event.
Reviewed-by: Stephane Eranian <eranian@google.com>
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
include/linux/perf_event.h | 28 +++++++++++++++++++++++++++-
kernel/events/core.c | 27 +++++++++++++++++++++++++++
2 files changed, 54 insertions(+), 1 deletion(-)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index bf29258..b010b55 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -690,7 +690,9 @@ struct perf_cgroup_info {
};
struct perf_cgroup {
- struct cgroup_subsys_state css;
+ /* Architecture specific information. */
+ void *arch_info;
+ struct cgroup_subsys_state css;
struct perf_cgroup_info __percpu *info;
};
@@ -1228,4 +1230,28 @@ _name##_show(struct device *dev, \
\
static struct device_attribute format_attr_##_name = __ATTR_RO(_name)
+
+/*
+ * Hooks for architecture specific extensions for perf_cgroup.
+ */
+#ifndef perf_cgroup_arch_css_alloc
+# define perf_cgroup_arch_css_alloc(parent_css, new_css) 0
+#endif
+
+#ifndef perf_cgroup_arch_css_online
+# define perf_cgroup_arch_css_online(css) 0
+#endif
+
+#ifndef perf_cgroup_arch_css_offline
+# define perf_cgroup_arch_css_offline(css) do { } while (0)
+#endif
+
+#ifndef perf_cgroup_arch_css_released
+# define perf_cgroup_arch_css_released(css) do { } while (0)
+#endif
+
+#ifndef perf_cgroup_arch_css_free
+# define perf_cgroup_arch_css_free(css) do { } while (0)
+#endif
+
#endif /* _LINUX_PERF_EVENT_H */
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 4aaec01..6fd226f 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9794,6 +9794,7 @@ static struct cgroup_subsys_state *
perf_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)
{
struct perf_cgroup *jc;
+ int ret;
jc = kzalloc(sizeof(*jc), GFP_KERNEL);
if (!jc)
@@ -9805,13 +9806,36 @@ perf_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)
return ERR_PTR(-ENOMEM);
}
+ jc->arch_info = NULL;
+
+ ret = perf_cgroup_arch_css_alloc(parent_css, &jc->css);
+ if (ret)
+ return ERR_PTR(ret);
+
return &jc->css;
}
+static int perf_cgroup_css_online(struct cgroup_subsys_state *css)
+{
+ return perf_cgroup_arch_css_online(css);
+}
+
+static void perf_cgroup_css_offline(struct cgroup_subsys_state *css)
+{
+ perf_cgroup_arch_css_offline(css);
+}
+
+static void perf_cgroup_css_released(struct cgroup_subsys_state *css)
+{
+ perf_cgroup_arch_css_released(css);
+}
+
static void perf_cgroup_css_free(struct cgroup_subsys_state *css)
{
struct perf_cgroup *jc = container_of(css, struct perf_cgroup, css);
+ perf_cgroup_arch_css_free(css);
+
free_percpu(jc->info);
kfree(jc);
}
@@ -9836,6 +9860,9 @@ static void perf_cgroup_attach(struct cgroup_taskset *tset)
struct cgroup_subsys perf_event_cgrp_subsys = {
.css_alloc = perf_cgroup_css_alloc,
+ .css_online = perf_cgroup_css_online,
+ .css_offline = perf_cgroup_css_offline,
+ .css_released = perf_cgroup_css_released,
.css_free = perf_cgroup_css_free,
.attach = perf_cgroup_attach,
};
--
2.8.0.rc3.226.g39d4020
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH 00/32] 2nd Iteration of Cache QoS Monitoring support. David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 06:50 +0200
[PATCH 01/32] perf/x86/intel/cqm: temporarily remove MBM from CQM and cleanup David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 06:50 +0200
Re: [PATCH 01/32] perf/x86/intel/cqm: temporarily remove MBM from CQM and cleanup Vikas Shivappa <vikas.shivappa@linux.intel.com> - 2016-04-29 22:30 +0200
[PATCH 24/32] perf/x86/intel/cqm: use PERF_INACTIVE_*_READ_* flags in CQM David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 06:50 +0200
[PATCH 25/32] sched: introduce the finish_arch_pre_lock_switch() scheduler hook David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 06:50 +0200
Re: [PATCH 25/32] sched: introduce the finish_arch_pre_lock_switch() scheduler hook Peter Zijlstra <peterz@infradead.org> - 2016-04-29 11:00 +0200
Re: [PATCH 25/32] sched: introduce the finish_arch_pre_lock_switch() scheduler hook David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 20:50 +0200
Re: [PATCH 25/32] sched: introduce the finish_arch_pre_lock_switch() scheduler hook Vikas Shivappa <vikas.shivappa@linux.intel.com> - 2016-04-29 22:30 +0200
Re: [PATCH 25/32] sched: introduce the finish_arch_pre_lock_switch() scheduler hook David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 23:00 +0200
[PATCH 14/32] perf/x86/intel/cqm: add preallocation of anodes David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 06:50 +0200
[PATCH 32/32] perf/stat: revamp error handling for snapshot and per_pkg events David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 06:50 +0200
[PATCH 09/32] perf/x86/intel/cqm: add per-package RMIDs, data and locks David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 06:50 +0200
Re: [PATCH 09/32] perf/x86/intel/cqm: add per-package RMIDs, data and locks Vikas Shivappa <vikas.shivappa@linux.intel.com> - 2016-04-29 23:00 +0200
[PATCH 29/32] perf,perf/x86,perf/powerpc,perf/arm,perf/*: add int error return to pmu::read David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 06:50 +0200
[PATCH 06/32] x86/intel,cqm: add CONFIG_INTEL_RDT configuration flag and refactor PQR David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 06:50 +0200
[PATCH 15/32] perf/core: add hooks to expose architecture specific features in perf_cgroup David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 18/32] perf/x86/intel/cqm: use pmu::event_terminate David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 16/32] perf/x86/intel/cqm: add cgroup support David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 17/32] perf/core: adding pmu::event_terminate David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 05/32] perf/core: remove unused pmu->count David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 04/32] perf/x86/intel/cqm: make read of RMIDs per package (Temporal) David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 11/32] perf/x86/intel/cqm: (I)state and limbo prmids David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 12/32] perf/x86/intel/cqm: add per-package RMID rotation David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 08/32] perf/x86/intel/cqm: prepare for next patches David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
Re: [PATCH 08/32] perf/x86/intel/cqm: prepare for next patches Peter Zijlstra <peterz@infradead.org> - 2016-04-29 11:20 +0200
[PATCH 07/32] perf/x86/intel/cqm: separate CQM PMU's attributes from x86 PMU David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 19/32] perf/core: introduce PMU event flag PERF_CGROUP_NO_RECURSION David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
[PATCH 10/32] perf/x86/intel/cqm: basic RMID hierarchy with per package rmids David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 07:00 +0200
Re: [PATCH 00/32] 2nd Iteration of Cache QoS Monitoring support. Vikas Shivappa <vikas.shivappa@linux.intel.com> - 2016-04-29 23:10 +0200
Re: [PATCH 00/32] 2nd Iteration of Cache QoS Monitoring support. David Carrillo-Cisneros <davidcc@google.com> - 2016-04-29 23:20 +0200
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