| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 9 Jul 2013 18:56:31 +0200
From: Jiri Olsa <jolsa@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Jiri Olsa <jolsa@...hat.com>,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Ingo Molnar <mingo@...e.hu>,
Namhyung Kim <namhyung@...nel.org>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH] perf: Remove match callback for auxiliary events processing
Removing match callback for auxiliary events processing
with following benefits:
- only one function pointer is passed along the way
- the match function is called within output function
and could be inlined by compiler
Suggested-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
---
kernel/events/core.c | 79 ++++++++++++++++++++++++++--------------------------
1 file changed, 39 insertions(+), 40 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 1833bc5..bce961a 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4658,12 +4658,10 @@ 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)
{
@@ -4674,15 +4672,12 @@ 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;
@@ -4695,7 +4690,7 @@ 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;
@@ -4703,14 +4698,14 @@ 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();
@@ -4737,6 +4732,12 @@ 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)
{
@@ -4746,6 +4747,9 @@ 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,
@@ -4768,13 +4772,6 @@ 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)
@@ -4803,8 +4800,7 @@ 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);
}
@@ -4831,6 +4827,11 @@ 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)
{
@@ -4840,6 +4841,9 @@ 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);
@@ -4861,12 +4865,6 @@ 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];
@@ -4881,8 +4879,7 @@ 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);
}
@@ -4945,6 +4942,17 @@ 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)
{
@@ -4954,6 +4962,9 @@ 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);
@@ -4974,17 +4985,6 @@ 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;
@@ -5048,8 +5048,7 @@ 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);
--
1.7.11.7
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists