Jiri Olsa [jo...@redhat.com] wrote:
| On Wed, Nov 07, 2012 at 11:19:28AM -0800, Sukadev Bhattiprolu wrote:
|
| SNIP
|
| > +struct perf_pmu_events_attr {
| > + struct device_attribute attr;
| > + u64 id;
| > +};
| > +
| > +extern ssize_t power_events_sysfs_show(struct device *dev,
| > + struct device_attribute *attr, char *page);
| > +
| > +#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, power_events_sysfs_show, NULL),\
| > + .id = PM_##_id,
\
| > + };
|
| this is duplicating the x86 code, perhaps it could be moved
| to include/linux/perf_event.h and shared globaly
Ok.
Can we remove the assumption that the event id is a generic event that
has PERF_COUNT_HW_ prefix and also let the architectures pass in a "show"
function ? This would allow architectures to display any arch specific
events that don't yet have a generic counterpart.
IOW, can we do something like this (untested) and make PERF_EVENT_ATTR global:
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 4428fd1..25298f7 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1354,12 +1354,15 @@ static ssize_t events_sysfs_show(struct device *dev,
struct device_attribute *at
#define EVENT_VAR(_id) event_attr_##_id
#define EVENT_PTR(_id) &event_attr_##_id.attr.attr
-#define EVENT_ATTR(_name, _id) \
+#define PERF_EVENT_ATTR(_name, _id, _show) \
static struct perf_pmu_events_attr EVENT_VAR(_id) = { \
- .attr = __ATTR(_name, 0444, events_sysfs_show, NULL), \
- .id = PERF_COUNT_HW_##_id, \
+ .attr = __ATTR(_name, 0444, _show, NULL), \
+ .id = _id, \
};
+#define EVENT_ATTR(_name, _id) \
+ PERF_EVENT_ATTR(_name, PERF_COUNT_HW_##_id, events_sysfs_show)
+
EVENT_ATTR(cpu-cycles, CPU_CYCLES );
EVENT_ATTR(instructions, INSTRUCTIONS );
EVENT_ATTR(cache-references, CACHE_REFERENCES );
|
|
| > diff --git a/arch/powerpc/perf/core-book3s.c
b/arch/powerpc/perf/core-book3s.c
| > index aa2465e..19b23bd 100644
| > --- a/arch/powerpc/perf/core-book3s.c
| > +++ b/arch/powerpc/perf/core-book3s.c
| > @@ -1305,6 +1305,16 @@ static int power_pmu_event_idx(struct perf_event
*event)
| > return event->hw.idx;
| > }
| >
| > +ssize_t power_events_sysfs_show(struct device *dev,
| > + struct device_attribute *attr, char *page)
| > +{
| > + struct perf_pmu_events_attr *pmu_attr;
| > +
| > + pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr);
| > +
| > + return sprintf(page, "event=0x%02llx\n", pmu_attr->id);
|
| whitespace issues
Will fix. Thanks for the review.
Sukadev
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