#include <asm/irq_regs.h>
+enum event_type_t {
+ EVENT_FLEXIBLE = 0x1,
+ EVENT_PINNED = 0x2,
+ EVENT_ALL = EVENT_FLEXIBLE | EVENT_PINNED,
+};
+
atomic_t perf_task_events __read_mostly;
static atomic_t nr_mmap_events __read_mostly;
static atomic_t nr_comm_events __read_mostly;
static atomic64_t perf_event_id;
+static void cpu_ctx_sched_out(struct perf_cpu_context *cpuctx,
+ enum event_type_t event_type);
+
+static void cpu_ctx_sched_in(struct perf_cpu_context *cpuctx,
+ enum event_type_t event_type);
+
void __weak perf_event_print_debug(void) { }
extern __weak const char *perf_pmu_name(void)
return "pmu";
}
+static inline u64 perf_clock(void)
+{
+ return local_clock();
+}
+
void perf_pmu_disable(struct pmu *pmu)
{
int *count = this_cpu_ptr(pmu->pmu_disable_count);
put_ctx(ctx);
}
-static inline u64 perf_clock(void)
-{
- return local_clock();
-}
-
/*
* Update the record of the current time in a context.
*/
ctx->timestamp = now;
}
+static u64 perf_event_time(struct perf_event *event)
+{
+ struct perf_event_context *ctx = event->ctx;
+ return ctx ? ctx->time : 0;
+}
+
/*
* Update the total_time_enabled and total_time_running fields for a event.
*/
return;
if (ctx->is_active)
- run_end = ctx->time;
+ run_end = perf_event_time(event);
else
run_end = event->tstamp_stopped;
if (event->state == PERF_EVENT_STATE_INACTIVE)
run_end = event->tstamp_stopped;
else
- run_end = ctx->time;
+ run_end = perf_event_time(event);
event->total_time_running = run_end - event->tstamp_running;
}
struct perf_cpu_context *cpuctx,
struct perf_event_context *ctx)
{
+ u64 tstamp = perf_event_time(event);
u64 delta;
/*
* An event which could not be activated because of
&& !event_filter_match(event)) {
delta = ctx->time - event->tstamp_stopped;
event->tstamp_running += delta;
- event->tstamp_stopped = ctx->time;
+ event->tstamp_stopped = tstamp;
}
if (event->state != PERF_EVENT_STATE_ACTIVE)
event->pending_disable = 0;
event->state = PERF_EVENT_STATE_OFF;
}
- event->tstamp_stopped = ctx->time;
+ event->tstamp_stopped = tstamp;
event->pmu->del(event, 0);
event->oncpu = -1;
struct perf_cpu_context *cpuctx,
struct perf_event_context *ctx)
{
+ u64 tstamp = perf_event_time(event);
+
if (event->state <= PERF_EVENT_STATE_OFF)
return 0;
return -EAGAIN;
}
- event->tstamp_running += ctx->time - event->tstamp_stopped;
+ event->tstamp_running += tstamp - event->tstamp_stopped;
- event->shadow_ctx_time = ctx->time - ctx->timestamp;
+ event->shadow_ctx_time = tstamp - ctx->timestamp;
if (!is_software_event(event))
cpuctx->active_oncpu++;
static void add_event_to_ctx(struct perf_event *event,
struct perf_event_context *ctx)
{
+ u64 tstamp = perf_event_time(event);
+
list_add_event(event, ctx);
perf_group_attach(event);
- event->tstamp_enabled = ctx->time;
- event->tstamp_running = ctx->time;
- event->tstamp_stopped = ctx->time;
+ event->tstamp_enabled = tstamp;
+ event->tstamp_running = tstamp;
+ event->tstamp_stopped = tstamp;
}
/*
add_event_to_ctx(event, ctx);
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
goto unlock;
/*
struct perf_event_context *ctx)
{
struct perf_event *sub;
+ u64 tstamp = perf_event_time(event);
event->state = PERF_EVENT_STATE_INACTIVE;
- event->tstamp_enabled = ctx->time - event->total_time_enabled;
+ event->tstamp_enabled = tstamp - event->total_time_enabled;
list_for_each_entry(sub, &event->sibling_list, group_entry) {
- if (sub->state >= PERF_EVENT_STATE_INACTIVE) {
- sub->tstamp_enabled =
- ctx->time - sub->total_time_enabled;
- }
+ if (sub->state >= PERF_EVENT_STATE_INACTIVE)
+ sub->tstamp_enabled = tstamp - sub->total_time_enabled;
}
}
goto unlock;
__perf_event_mark_enabled(event, ctx);
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
goto unlock;
/*
return 0;
}
-enum event_type_t {
- EVENT_FLEXIBLE = 0x1,
- EVENT_PINNED = 0x2,
- EVENT_ALL = EVENT_FLEXIBLE | EVENT_PINNED,
-};
-
static void ctx_sched_out(struct perf_event_context *ctx,
struct perf_cpu_context *cpuctx,
enum event_type_t event_type)
list_for_each_entry(event, &ctx->pinned_groups, group_entry) {
if (event->state <= PERF_EVENT_STATE_OFF)
continue;
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
continue;
if (group_can_go_on(event, cpuctx, 1))
* Listen to the 'cpu' scheduling filter constraint
* of events:
*/
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
continue;
if (group_can_go_on(event, cpuctx, can_add_hw)) {
if (event->state != PERF_EVENT_STATE_ACTIVE)
continue;
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
continue;
hwc = &event->hw;
unsigned long flags;
int ctxn, err;
- if (!task && cpu != -1) {
+ if (!task) {
/* Must be root to operate on a CPU event: */
if (perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN))
return ERR_PTR(-EACCES);
- if (cpu < 0 || cpu >= nr_cpumask_bits)
- return ERR_PTR(-EINVAL);
-
/*
* We could be clever and allow to attach a event to an
* offline CPU and activate it when the CPU comes up, but
if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
return 0;
if (event->attr.comm || event->attr.mmap ||
if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
return 0;
if (event->attr.comm)
if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
return 0;
if ((!executable && event->attr.mmap_data) ||
struct hw_perf_event *hwc;
long err;
+ if ((unsigned)cpu >= nr_cpu_ids) {
+ if (!task || cpu != -1)
+ return ERR_PTR(-EINVAL);
+ }
+
event = kzalloc(sizeof(*event), GFP_KERNEL);
if (!event)
return ERR_PTR(-ENOMEM);
if (!overflow_handler && parent_event)
overflow_handler = parent_event->overflow_handler;
-
+
event->overflow_handler = overflow_handler;
if (attr->disabled)
raw_spin_lock_irqsave(&parent_ctx->lock, flags);
parent_ctx->rotate_disable = 0;
- raw_spin_unlock_irqrestore(&parent_ctx->lock, flags);
child_ctx = child->perf_event_ctxp[ctxn];
/*
* Mark the child context as a clone of the parent
* context, or of whatever the parent is a clone of.
- * Note that if the parent is a clone, it could get
- * uncloned at any point, but that doesn't matter
- * because the list of events and the generation
- * count can't have changed since we took the mutex.
+ *
+ * Note that if the parent is a clone, the holding of
+ * parent_ctx->lock avoids it from being uncloned.
*/
- cloned_ctx = rcu_dereference(parent_ctx->parent_ctx);
+ cloned_ctx = parent_ctx->parent_ctx;
if (cloned_ctx) {
child_ctx->parent_ctx = cloned_ctx;
child_ctx->parent_gen = parent_ctx->parent_gen;
get_ctx(child_ctx->parent_ctx);
}
+ raw_spin_unlock_irqrestore(&parent_ctx->lock, flags);
mutex_unlock(&parent_ctx->mutex);
perf_unpin_context(parent_ctx);
git.openpandora.org / pandora-kernel.git / blobdiff