Messages in this thread Patch in this message |  | | From | Andi Kleen <> | Subject | [PATCH 23/29] perf, x86: improve sysfs event mapping with event string | Date | Thu, 17 Jan 2013 12:36:46 -0800 |
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From: Stephane Eranian <eranian@google.com>
This patch extends Jiri's changes to make generic events mapping visible via sysfs. The patch extends the mechanism to non-generic events by allowing the mappings to be hardcoded in strings.
This mechanism will be used by the PEBS-LL patch later on.
[AK: Make events_sysfs_show unstatic again to fix compilation] Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> --- arch/x86/kernel/cpu/perf_event.c | 28 +++++++++++++--------------- arch/x86/kernel/cpu/perf_event.h | 26 ++++++++++++++++++++++++++ 2 files changed, 39 insertions(+), 15 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index ec3c549..6cdc012 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1316,20 +1316,22 @@ static struct attribute_group x86_pmu_format_group = { .attrs = NULL, }; -struct perf_pmu_events_attr { - struct device_attribute attr; - u64 id; -}; - /* * Remove all undefined events (x86_pmu.event_map(id) == 0) * out of events_attr attributes. */ static void __init filter_events(struct attribute **attrs) { + struct device_attribute *d; + struct perf_pmu_events_attr *pmu_attr; int i, j; for (i = 0; attrs[i]; i++) { + d = (struct device_attribute *)attrs[i]; + pmu_attr = container_of(d, struct perf_pmu_events_attr, attr); + /* str trumps id */ + if (pmu_attr->event_str) + continue; if (x86_pmu.event_map(i)) continue; @@ -1341,24 +1343,20 @@ static void __init filter_events(struct attribute **attrs) } } -static ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr, +ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr, char *page) { struct perf_pmu_events_attr *pmu_attr = \ container_of(attr, struct perf_pmu_events_attr, attr); u64 config = x86_pmu.event_map(pmu_attr->id); - return x86_pmu.events_sysfs_show(page, config); -} -#define EVENT_VAR(_id) event_attr_##_id -#define EVENT_PTR(_id) &event_attr_##_id.attr.attr + /* string trumps id */ + if (pmu_attr->event_str) + return sprintf(page, "%s", pmu_attr->event_str); -#define EVENT_ATTR(_name, _id) \ -static struct perf_pmu_events_attr EVENT_VAR(_id) = { \ - .attr = __ATTR(_name, 0444, events_sysfs_show, NULL), \ - .id = PERF_COUNT_HW_##_id, \ -}; + return x86_pmu.events_sysfs_show(page, config); +} EVENT_ATTR(cpu-cycles, CPU_CYCLES ); EVENT_ATTR(instructions, INSTRUCTIONS ); diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h index d55e502..8253b73 100644 --- a/arch/x86/kernel/cpu/perf_event.h +++ b/arch/x86/kernel/cpu/perf_event.h @@ -425,6 +425,29 @@ do { \ #define ERF_NO_HT_SHARING 1 #define ERF_HAS_RSP_1 2 +#define EVENT_VAR(_id) event_attr_##_id +#define EVENT_PTR(_id) &event_attr_##_id.attr.attr + +#define EVENT_ATTR(_name, _id) \ +static struct perf_pmu_events_attr EVENT_VAR(_id) = { \ + .attr = __ATTR(_name, 0444, events_sysfs_show, NULL), \ + .id = PERF_COUNT_HW_##_id, \ + .event_str = NULL, \ +}; + +#define EVENT_ATTR_STR(_name, v, str) \ +static struct perf_pmu_events_attr event_attr_##v = { \ + .attr = __ATTR(_name, 0444, events_sysfs_show, NULL),\ + .id = 0, \ + .event_str = str, \ +}; + +struct perf_pmu_events_attr { + struct device_attribute attr; + u64 id; + const char *event_str; +}; + extern struct x86_pmu x86_pmu __read_mostly; DECLARE_PER_CPU(struct cpu_hw_events, cpu_hw_events); @@ -643,6 +666,9 @@ int p6_pmu_init(void); int knc_pmu_init(void); +ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr, + char *page); + #else /* CONFIG_CPU_SUP_INTEL */ static inline void reserve_ds_buffers(void) -- 1.7.7.6
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