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Message-Id: <1363167740-27735-2-git-send-email-chenggang.qin@gmail.com>
Date: Wed, 13 Mar 2013 17:42:13 +0800
From: chenggang <chenggang.qin@...il.com>
To: linux-kernel@...r.kernel.org
Cc: chenggang <chenggang.qcg@...bao.com>,
David Ahern <dsahern@...il.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Paul Mackerras <paulus@...ba.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
Arjan van de Ven <arjan@...ux.intel.com>,
Namhyung Kim <namhyung@...il.com>,
Yanmin Zhang <yanmin.zhang@...el.com>,
Wu Fengguang <fengguang.wu@...el.com>,
Mike Galbraith <efault@....de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v3 7/8]Perf: changed the method to traverse mmap list
From: chenggang <chenggang.qcg@...bao.com>
Changed the method to traverse the evlist->mmap list. The evlist->mmap
list is traversed very frequently. So we need to be more efficient to do
it.
Cc: David Ahern <dsahern@...il.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Arjan van de Ven <arjan@...ux.intel.com>
Cc: Namhyung Kim <namhyung@...il.com>
Cc: Yanmin Zhang <yanmin.zhang@...el.com>
Cc: Wu Fengguang <fengguang.wu@...el.com>
Cc: Mike Galbraith <efault@....de>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Chenggang Qin <chenggang.qcg@...bao.com>
---
tools/perf/builtin-top.c | 11 ++++++-----
tools/perf/tests/mmap-basic.c | 4 +++-
tools/perf/tests/open-syscall-tp-fields.c | 7 ++++---
tools/perf/tests/perf-record.c | 7 ++++---
tools/perf/util/evlist.c | 4 ++--
tools/perf/util/evlist.h | 3 ++-
tools/perf/util/python.c | 4 +++-
7 files changed, 24 insertions(+), 16 deletions(-)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 72f6eb7..cff58e5 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -800,7 +800,7 @@ static void perf_event__process_sample(struct perf_tool *tool,
return;
}
-static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
+static void perf_top__mmap_read_idx(struct perf_top *top, struct perf_mmap *md)
{
struct perf_sample sample;
struct perf_evsel *evsel;
@@ -810,7 +810,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
u8 origin;
int ret;
- while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
+ while ((event = perf_evlist__mmap_read(top->evlist, md)) != NULL) {
ret = perf_evlist__parse_sample(top->evlist, event, &sample);
if (ret) {
pr_err("Can't parse sample, err = %d\n", ret);
@@ -867,10 +867,11 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
static void perf_top__mmap_read(struct perf_top *top)
{
- int i;
+ struct perf_mmap *md;
- for (i = 0; i < top->evlist->nr_mmaps; i++)
- perf_top__mmap_read_idx(top, i);
+ for_each_mmap(md, top->evlist) {
+ perf_top__mmap_read_idx(top, md);
+ }
}
static int perf_top__start_counters(struct perf_top *top)
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index cdd5075..93639a8 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -19,6 +19,7 @@ int test__basic_mmap(void)
{
int err = -1;
union perf_event *event;
+ struct perf_mmap *md;
struct thread_map *threads;
struct cpu_map *cpus;
struct perf_evlist *evlist;
@@ -97,7 +98,8 @@ int test__basic_mmap(void)
++foo;
}
- while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
+ md = perf_evlist__get_mmap(evlist, 0);
+ while ((event = perf_evlist__mmap_read(evlist, md)) != NULL) {
struct perf_sample sample;
if (event->header.type != PERF_RECORD_SAMPLE) {
diff --git a/tools/perf/tests/open-syscall-tp-fields.c b/tools/perf/tests/open-syscall-tp-fields.c
index 39eb770..cb12e82 100644
--- a/tools/perf/tests/open-syscall-tp-fields.c
+++ b/tools/perf/tests/open-syscall-tp-fields.c
@@ -20,7 +20,7 @@ int test__syscall_open_tp_fields(void)
int flags = O_RDONLY | O_DIRECTORY;
struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
struct perf_evsel *evsel;
- int err = -1, i, nr_events = 0, nr_polls = 0;
+ int err = -1, nr_events = 0, nr_polls = 0;
if (evlist == NULL) {
pr_debug("%s: perf_evlist__new\n", __func__);
@@ -66,11 +66,12 @@ int test__syscall_open_tp_fields(void)
while (1) {
int before = nr_events;
+ struct perf_mmap *md;
- for (i = 0; i < evlist->nr_mmaps; i++) {
+ for_each_mmap(md, evlist) {
union perf_event *event;
- while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+ while ((event = perf_evlist__mmap_read(evlist, md)) != NULL) {
const u32 type = event->header.type;
int tp_flags;
struct perf_sample sample;
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 1e8e512..8aef6d2 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -56,7 +56,7 @@ int test__PERF_RECORD(void)
found_libc_mmap = false,
found_vdso_mmap = false,
found_ld_mmap = false;
- int err = -1, errs = 0, i, wakeups = 0;
+ int err = -1, errs = 0, wakeups = 0;
u32 cpu;
int total_events = 0, nr_events[PERF_RECORD_MAX] = { 0, };
@@ -158,11 +158,12 @@ int test__PERF_RECORD(void)
while (1) {
int before = total_events;
+ struct perf_mmap *md;
- for (i = 0; i < evlist->nr_mmaps; i++) {
+ for_each_mmap(md, evlist) {
union perf_event *event;
- while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+ while ((event = perf_evlist__mmap_read(evlist, md)) != NULL) {
const u32 type = event->header.type;
const char *name = perf_event__name(type);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 74af9bb..25c3cb9 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -362,9 +362,9 @@ struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
return NULL;
}
-union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx)
+union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist,
+ struct perf_mmap *md)
{
- struct perf_mmap *md = perf_evlist__get_mmap(evlist, idx);
unsigned int head = perf_mmap__read_head(md);
unsigned int old = md->prev;
unsigned char *data = md->base + page_size;
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 8693c11..1c74fa0 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -80,7 +80,8 @@ void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd);
struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);
-union perf_event *perf_evlist__mmap_read(struct perf_evlist *self, int idx);
+union perf_event *perf_evlist__mmap_read(struct perf_evlist *self,
+ struct perf_mmap *md);
int perf_evlist__open(struct perf_evlist *evlist);
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index e3f3f1b..91b00e8 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -789,6 +789,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
{
struct perf_evlist *evlist = &pevlist->evlist;
union perf_event *event;
+ struct perf_mmap *md;
int sample_id_all = 1, cpu;
static char *kwlist[] = { "cpu", "sample_id_all", NULL };
int err;
@@ -797,7 +798,8 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
&cpu, &sample_id_all))
return NULL;
- event = perf_evlist__mmap_read(evlist, cpu);
+ md = perf_evlist__get_mmap(evlist, cpu);
+ event = perf_evlist__mmap_read(evlist, md);
if (event != NULL) {
PyObject *pyevent = pyrf_event__new(event);
struct pyrf_event *pevent = (struct pyrf_event *)pyevent;
--
1.7.9.5
--
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