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perf_counter: Push perf_sample_data through the swcounter code

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Push the perf_sample_data further outwards to the swcounter interface,
to abstract it away some more.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2009-06-19 18:11:53 +02:00 committed by Ingo Molnar
parent 9cffa8d533
commit 92bf309a9c
1 changed files with 29 additions and 26 deletions
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55
kernel/perf_counter.c
View file

@ -3171,20 +3171,15 @@ static enum hrtimer_restart perf_swcounter_hrtimer(struct hrtimer *hrtimer)
}
static void perf_swcounter_overflow(struct perf_counter *counter,
int nmi, struct pt_regs *regs, u64 addr)
int nmi, struct perf_sample_data *data)
{
struct perf_sample_data data = {
.regs = regs,
.addr = addr,
.period = counter->hw.last_period,
};
data->period = counter->hw.last_period;
perf_swcounter_update(counter);
perf_swcounter_set_period(counter);
if (perf_counter_overflow(counter, nmi, &data))
if (perf_counter_overflow(counter, nmi, data))
/* soft-disable the counter */
;
}
static int perf_swcounter_is_counting(struct perf_counter *counter)
@ -3249,18 +3244,18 @@ static int perf_swcounter_match(struct perf_counter *counter,
}
static void perf_swcounter_add(struct perf_counter *counter, u64 nr,
int nmi, struct pt_regs *regs, u64 addr)
int nmi, struct perf_sample_data *data)
{
int neg = atomic64_add_negative(nr, &counter->hw.count);
if (counter->hw.sample_period && !neg && regs)
perf_swcounter_overflow(counter, nmi, regs, addr);
if (counter->hw.sample_period && !neg && data->regs)
perf_swcounter_overflow(counter, nmi, data);
}
static void perf_swcounter_ctx_event(struct perf_counter_context *ctx,
enum perf_type_id type, u32 event,
u64 nr, int nmi, struct pt_regs *regs,
u64 addr)
enum perf_type_id type,
u32 event, u64 nr, int nmi,
struct perf_sample_data *data)
{
struct perf_counter *counter;
@ -3269,8 +3264,8 @@ static void perf_swcounter_ctx_event(struct perf_counter_context *ctx,
rcu_read_lock();
list_for_each_entry_rcu(counter, &ctx->event_list, event_entry) {
if (perf_swcounter_match(counter, type, event, regs))
perf_swcounter_add(counter, nr, nmi, regs, addr);
if (perf_swcounter_match(counter, type, event, data->regs))
perf_swcounter_add(counter, nr, nmi, data);
}
rcu_read_unlock();
}
@ -3289,9 +3284,9 @@ static int *perf_swcounter_recursion_context(struct perf_cpu_context *cpuctx)
return &cpuctx->recursion[0];
}
static void __perf_swcounter_event(enum perf_type_id type, u32 event,
u64 nr, int nmi, struct pt_regs *regs,
u64 addr)
static void do_perf_swcounter_event(enum perf_type_id type, u32 event,
u64 nr, int nmi,
struct perf_sample_data *data)
{
struct perf_cpu_context *cpuctx = &get_cpu_var(perf_cpu_context);
int *recursion = perf_swcounter_recursion_context(cpuctx);
@ -3304,7 +3299,7 @@ static void __perf_swcounter_event(enum perf_type_id type, u32 event,
barrier();
perf_swcounter_ctx_event(&cpuctx->ctx, type, event,
nr, nmi, regs, addr);
nr, nmi, data);
rcu_read_lock();
/*
* doesn't really matter which of the child contexts the
@ -3312,7 +3307,7 @@ static void __perf_swcounter_event(enum perf_type_id type, u32 event,
*/
ctx = rcu_dereference(current->perf_counter_ctxp);
if (ctx)
perf_swcounter_ctx_event(ctx, type, event, nr, nmi, regs, addr);
perf_swcounter_ctx_event(ctx, type, event, nr, nmi, data);
rcu_read_unlock();
barrier();
@ -3325,7 +3320,12 @@ static void __perf_swcounter_event(enum perf_type_id type, u32 event,
void
perf_swcounter_event(u32 event, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
{
__perf_swcounter_event(PERF_TYPE_SOFTWARE, event, nr, nmi, regs, addr);
struct perf_sample_data data = {
.regs = regs,
.addr = addr,
};
do_perf_swcounter_event(PERF_TYPE_SOFTWARE, event, nr, nmi, &data);
}
static void perf_swcounter_read(struct perf_counter *counter)
@ -3469,12 +3469,15 @@ static const struct pmu perf_ops_task_clock = {
#ifdef CONFIG_EVENT_PROFILE
void perf_tpcounter_event(int event_id)
{
struct pt_regs *regs = get_irq_regs();
struct perf_sample_data data = {
.regs = get_irq_regs();
.addr = 0,
};
if (!regs)
regs = task_pt_regs(current);
if (!data.regs)
data.regs = task_pt_regs(current);
__perf_swcounter_event(PERF_TYPE_TRACEPOINT, event_id, 1, 1, regs, 0);
do_perf_swcounter_event(PERF_TYPE_TRACEPOINT, event_id, 1, 1, &data);
}
EXPORT_SYMBOL_GPL(perf_tpcounter_event);