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perf: Remove the 'match' callback for auxiliary events processing 

It gives the following benefits:

  - only one function pointer is passed along the way

  - the 'match' function is called within output function
    and could be inlined by the compiler

Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1373388991-9711-1-git-send-email-jolsa@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Jiri Olsa 2013-07-09 18:56:31 +02:00 committed by Ingo Molnar
parent 058ebd0eba
commit 6751684462
1 changed files with 39 additions and 40 deletions
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79
kernel/events/core.c
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@ -4680,12 +4680,10 @@ perf_event_read_event(struct perf_event *event,
perf_output_end(&handle);
}
typedef int (perf_event_aux_match_cb)(struct perf_event *event, void *data);
typedef void (perf_event_aux_output_cb)(struct perf_event *event, void *data);
static void
perf_event_aux_ctx(struct perf_event_context *ctx,
perf_event_aux_match_cb match,
perf_event_aux_output_cb output,
void *data)
{
@ -4696,15 +4694,12 @@ perf_event_aux_ctx(struct perf_event_context *ctx,
continue;
if (!event_filter_match(event))
continue;
if (match(event, data))
output(event, data);
output(event, data);
}
}
static void
perf_event_aux(perf_event_aux_match_cb match,
perf_event_aux_output_cb output,
void *data,
perf_event_aux(perf_event_aux_output_cb output, void *data,
struct perf_event_context *task_ctx)
{
struct perf_cpu_context *cpuctx;
@ -4717,7 +4712,7 @@ perf_event_aux(perf_event_aux_match_cb match,
cpuctx = get_cpu_ptr(pmu->pmu_cpu_context);
if (cpuctx->unique_pmu != pmu)
goto next;
perf_event_aux_ctx(&cpuctx->ctx, match, output, data);
perf_event_aux_ctx(&cpuctx->ctx, output, data);
if (task_ctx)
goto next;
ctxn = pmu->task_ctx_nr;
@ -4725,14 +4720,14 @@ perf_event_aux(perf_event_aux_match_cb match,
goto next;
ctx = rcu_dereference(current->perf_event_ctxp[ctxn]);
if (ctx)
perf_event_aux_ctx(ctx, match, output, data);
perf_event_aux_ctx(ctx, output, data);
next:
put_cpu_ptr(pmu->pmu_cpu_context);
}
if (task_ctx) {
preempt_disable();
perf_event_aux_ctx(task_ctx, match, output, data);
perf_event_aux_ctx(task_ctx, output, data);
preempt_enable();
}
rcu_read_unlock();
@ -4759,6 +4754,12 @@ struct perf_task_event {
} event_id;
};
static int perf_event_task_match(struct perf_event *event)
{
return event->attr.comm || event->attr.mmap ||
event->attr.mmap_data || event->attr.task;
}
static void perf_event_task_output(struct perf_event *event,
void *data)
{
@ -4768,6 +4769,9 @@ static void perf_event_task_output(struct perf_event *event,
struct task_struct *task = task_event->task;
int ret, size = task_event->event_id.header.size;
if (!perf_event_task_match(event))
return;
perf_event_header__init_id(&task_event->event_id.header, &sample, event);
ret = perf_output_begin(&handle, event,
@ -4790,13 +4794,6 @@ out:
task_event->event_id.header.size = size;
}
static int perf_event_task_match(struct perf_event *event,
void *data __maybe_unused)
{
return event->attr.comm || event->attr.mmap ||
event->attr.mmap_data || event->attr.task;
}
static void perf_event_task(struct task_struct *task,
struct perf_event_context *task_ctx,
int new)
@ -4825,8 +4822,7 @@ static void perf_event_task(struct task_struct *task,
},
};
perf_event_aux(perf_event_task_match,
perf_event_task_output,
perf_event_aux(perf_event_task_output,
&task_event,
task_ctx);
}
@ -4853,6 +4849,11 @@ struct perf_comm_event {
} event_id;
};
static int perf_event_comm_match(struct perf_event *event)
{
return event->attr.comm;
}
static void perf_event_comm_output(struct perf_event *event,
void *data)
{
@ -4862,6 +4863,9 @@ static void perf_event_comm_output(struct perf_event *event,
int size = comm_event->event_id.header.size;
int ret;
if (!perf_event_comm_match(event))
return;
perf_event_header__init_id(&comm_event->event_id.header, &sample, event);
ret = perf_output_begin(&handle, event,
comm_event->event_id.header.size);
@ -4883,12 +4887,6 @@ out:
comm_event->event_id.header.size = size;
}
static int perf_event_comm_match(struct perf_event *event,
void *data __maybe_unused)
{
return event->attr.comm;
}
static void perf_event_comm_event(struct perf_comm_event *comm_event)
{
char comm[TASK_COMM_LEN];
@ -4903,8 +4901,7 @@ static void perf_event_comm_event(struct perf_comm_event *comm_event)
comm_event->event_id.header.size = sizeof(comm_event->event_id) + size;
perf_event_aux(perf_event_comm_match,
perf_event_comm_output,
perf_event_aux(perf_event_comm_output,
comm_event,
NULL);
}
@ -4967,6 +4964,17 @@ struct perf_mmap_event {
} event_id;
};
static int perf_event_mmap_match(struct perf_event *event,
void *data)
{
struct perf_mmap_event *mmap_event = data;
struct vm_area_struct *vma = mmap_event->vma;
int executable = vma->vm_flags & VM_EXEC;
return (!executable && event->attr.mmap_data) ||
(executable && event->attr.mmap);
}
static void perf_event_mmap_output(struct perf_event *event,
void *data)
{
@ -4976,6 +4984,9 @@ static void perf_event_mmap_output(struct perf_event *event,
int size = mmap_event->event_id.header.size;
int ret;
if (!perf_event_mmap_match(event, data))
return;
perf_event_header__init_id(&mmap_event->event_id.header, &sample, event);
ret = perf_output_begin(&handle, event,
mmap_event->event_id.header.size);
@ -4996,17 +5007,6 @@ out:
mmap_event->event_id.header.size = size;
}
static int perf_event_mmap_match(struct perf_event *event,
void *data)
{
struct perf_mmap_event *mmap_event = data;
struct vm_area_struct *vma = mmap_event->vma;
int executable = vma->vm_flags & VM_EXEC;
return (!executable && event->attr.mmap_data) ||
(executable && event->attr.mmap);
}
static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
{
struct vm_area_struct *vma = mmap_event->vma;
@ -5070,8 +5070,7 @@ got_name:
mmap_event->event_id.header.size = sizeof(mmap_event->event_id) + size;
perf_event_aux(perf_event_mmap_match,
perf_event_mmap_output,
perf_event_aux(perf_event_mmap_output,
mmap_event,
NULL);