Re: [PATCH v2 8/8] perf cpumap: Use perf_cpu_map__for_each_cpu when possible

From: Yang Jihong
Date: Thu Feb 01 2024 - 03:04:04 EST

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Hello,

On 2024/2/1 12:22, Ian Rogers wrote:

Rather than manually iterating the CPU map, use
perf_cpu_map__for_each_cpu. When possible tidy local variables.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
Reviewed-by: James Clark <james.clark@xxxxxxx>
---
tools/perf/arch/arm64/util/header.c | 10 ++--
tools/perf/tests/bitmap.c | 13 +++---
tools/perf/tests/topology.c | 46 +++++++++----------
tools/perf/util/bpf_kwork.c | 16 ++++---
tools/perf/util/bpf_kwork_top.c | 12 ++---
tools/perf/util/cpumap.c | 12 ++---
.../scripting-engines/trace-event-python.c | 12 +++--
tools/perf/util/session.c | 5 +-
tools/perf/util/svghelper.c | 20 ++++----
9 files changed, 72 insertions(+), 74 deletions(-)

diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c
index a9de0b5187dd..741df3614a09 100644
--- a/tools/perf/arch/arm64/util/header.c
+++ b/tools/perf/arch/arm64/util/header.c
@@ -4,8 +4,6 @@
#include <stdio.h>
#include <stdlib.h>
#include <perf/cpumap.h>
-#include <util/cpumap.h>
-#include <internal/cpumap.h>
#include <api/fs/fs.h>
#include <errno.h>
#include "debug.h"
@@ -19,18 +17,18 @@
static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
{
const char *sysfs = sysfs__mountpoint();
- int cpu;
- int ret = EINVAL;
+ struct perf_cpu cpu;
+ int idx, ret = EINVAL;
if (!sysfs || sz < MIDR_SIZE)
return EINVAL;
- for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) {
+ perf_cpu_map__for_each_cpu(cpu, idx, cpus) {
char path[PATH_MAX];
FILE *file;
scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d" MIDR,
- sysfs, RC_CHK_ACCESS(cpus)->map[cpu].cpu);
+ sysfs, cpu.cpu);
file = fopen(path, "r");
if (!file) {
diff --git a/tools/perf/tests/bitmap.c b/tools/perf/tests/bitmap.c
index 0173f5402a35..98956e0e0765 100644
--- a/tools/perf/tests/bitmap.c
+++ b/tools/perf/tests/bitmap.c
@@ -11,18 +11,19 @@
static unsigned long *get_bitmap(const char *str, int nbits)
{
struct perf_cpu_map *map = perf_cpu_map__new(str);
- unsigned long *bm = NULL;
- int i;
+ unsigned long *bm;
bm = bitmap_zalloc(nbits);
if (map && bm) {
- for (i = 0; i < perf_cpu_map__nr(map); i++)
- __set_bit(perf_cpu_map__cpu(map, i).cpu, bm);
+ int i;
+ struct perf_cpu cpu;
+
+ perf_cpu_map__for_each_cpu(cpu, i, map)
+ __set_bit(cpu.cpu, bm);
}
- if (map)
- perf_cpu_map__put(map);
+ perf_cpu_map__put(map);
return bm;
}
diff --git a/tools/perf/tests/topology.c b/tools/perf/tests/topology.c
index 2a842f53fbb5..a8cb5ba898ab 100644
--- a/tools/perf/tests/topology.c
+++ b/tools/perf/tests/topology.c
@@ -68,6 +68,7 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
};
int i;
struct aggr_cpu_id id;
+ struct perf_cpu cpu;
session = perf_session__new(&data, NULL);
TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
@@ -113,8 +114,7 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
TEST_ASSERT_VAL("Session header CPU map not set", session->header.env.cpu);
for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
- struct perf_cpu cpu = { .cpu = i };
-
+ cpu.cpu = i;
if (!perf_cpu_map__has(map, cpu))
continue;
pr_debug("CPU %d, core %d, socket %d\n", i,
@@ -123,48 +123,48 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
}
// Test that CPU ID contains socket, die, core and CPU
- for (i = 0; i < perf_cpu_map__nr(map); i++) {
- id = aggr_cpu_id__cpu(perf_cpu_map__cpu(map, i), NULL);
+ perf_cpu_map__for_each_cpu(cpu, i, map) {
+ id = aggr_cpu_id__cpu(cpu, NULL);
TEST_ASSERT_VAL("Cpu map - CPU ID doesn't match",
- perf_cpu_map__cpu(map, i).cpu == id.cpu.cpu);
+ cpu.cpu == id.cpu.cpu);
TEST_ASSERT_VAL("Cpu map - Core ID doesn't match",
- session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].core_id == id.core);
+ session->header.env.cpu[cpu.cpu].core_id == id.core);
TEST_ASSERT_VAL("Cpu map - Socket ID doesn't match",
- session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
+ session->header.env.cpu[cpu.cpu].socket_id ==
id.socket);
TEST_ASSERT_VAL("Cpu map - Die ID doesn't match",
- session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
+ session->header.env.cpu[cpu.cpu].die_id == id.die);
TEST_ASSERT_VAL("Cpu map - Node ID is set", id.node == -1);
TEST_ASSERT_VAL("Cpu map - Thread IDX is set", id.thread_idx == -1);
}
// Test that core ID contains socket, die and core
- for (i = 0; i < perf_cpu_map__nr(map); i++) {
- id = aggr_cpu_id__core(perf_cpu_map__cpu(map, i), NULL);
+ perf_cpu_map__for_each_cpu(cpu, i, map) {
+ id = aggr_cpu_id__core(cpu, NULL);
TEST_ASSERT_VAL("Core map - Core ID doesn't match",
- session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].core_id == id.core);
+ session->header.env.cpu[cpu.cpu].core_id == id.core);
TEST_ASSERT_VAL("Core map - Socket ID doesn't match",
- session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
+ session->header.env.cpu[cpu.cpu].socket_id ==
id.socket);
TEST_ASSERT_VAL("Core map - Die ID doesn't match",
- session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
+ session->header.env.cpu[cpu.cpu].die_id == id.die);
TEST_ASSERT_VAL("Core map - Node ID is set", id.node == -1);
TEST_ASSERT_VAL("Core map - Thread IDX is set", id.thread_idx == -1);
}
// Test that die ID contains socket and die
- for (i = 0; i < perf_cpu_map__nr(map); i++) {
- id = aggr_cpu_id__die(perf_cpu_map__cpu(map, i), NULL);
+ perf_cpu_map__for_each_cpu(cpu, i, map) {
+ id = aggr_cpu_id__die(cpu, NULL);
TEST_ASSERT_VAL("Die map - Socket ID doesn't match",
- session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
+ session->header.env.cpu[cpu.cpu].socket_id ==
id.socket);
TEST_ASSERT_VAL("Die map - Die ID doesn't match",
- session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
+ session->header.env.cpu[cpu.cpu].die_id == id.die);
TEST_ASSERT_VAL("Die map - Node ID is set", id.node == -1);
TEST_ASSERT_VAL("Die map - Core is set", id.core == -1);
@@ -173,10 +173,10 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
}
// Test that socket ID contains only socket
- for (i = 0; i < perf_cpu_map__nr(map); i++) {
- id = aggr_cpu_id__socket(perf_cpu_map__cpu(map, i), NULL);
+ perf_cpu_map__for_each_cpu(cpu, i, map) {
+ id = aggr_cpu_id__socket(cpu, NULL);
TEST_ASSERT_VAL("Socket map - Socket ID doesn't match",
- session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
+ session->header.env.cpu[cpu.cpu].socket_id ==
id.socket);
TEST_ASSERT_VAL("Socket map - Node ID is set", id.node == -1);
@@ -187,10 +187,10 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
}
// Test that node ID contains only node
- for (i = 0; i < perf_cpu_map__nr(map); i++) {
- id = aggr_cpu_id__node(perf_cpu_map__cpu(map, i), NULL);
+ perf_cpu_map__for_each_cpu(cpu, i, map) {
+ id = aggr_cpu_id__node(cpu, NULL);
TEST_ASSERT_VAL("Node map - Node ID doesn't match",
- cpu__get_node(perf_cpu_map__cpu(map, i)) == id.node);
+ cpu__get_node(cpu) == id.node);
TEST_ASSERT_VAL("Node map - Socket is set", id.socket == -1);
TEST_ASSERT_VAL("Node map - Die ID is set", id.die == -1);
TEST_ASSERT_VAL("Node map - Core is set", id.core == -1);
diff --git a/tools/perf/util/bpf_kwork.c b/tools/perf/util/bpf_kwork.c
index 6eb2c78fd7f4..44f0f708a15d 100644
--- a/tools/perf/util/bpf_kwork.c
+++ b/tools/perf/util/bpf_kwork.c
@@ -147,12 +147,12 @@ static bool valid_kwork_class_type(enum kwork_class_type type)
static int setup_filters(struct perf_kwork *kwork)
{
- u8 val = 1;
- int i, nr_cpus, key, fd;
- struct perf_cpu_map *map;
-
if (kwork->cpu_list != NULL) {
- fd = bpf_map__fd(skel->maps.perf_kwork_cpu_filter);
+ int idx, nr_cpus;
+ struct perf_cpu_map *map;
+ struct perf_cpu cpu;
+ int fd = bpf_map__fd(skel->maps.perf_kwork_cpu_filter);
+
if (fd < 0) {
pr_debug("Invalid cpu filter fd\n");
return -1;
@@ -165,8 +165,8 @@ static int setup_filters(struct perf_kwork *kwork)
}
nr_cpus = libbpf_num_possible_cpus();
- for (i = 0; i < perf_cpu_map__nr(map); i++) {
- struct perf_cpu cpu = perf_cpu_map__cpu(map, i);
+ perf_cpu_map__for_each_cpu(cpu, idx, map) {
+ u8 val = 1;
if (cpu.cpu >= nr_cpus) {
perf_cpu_map__put(map);
@@ -181,6 +181,8 @@ static int setup_filters(struct perf_kwork *kwork)
}
if (kwork->profile_name != NULL) {
+ int key, fd;
+
if (strlen(kwork->profile_name) >= MAX_KWORKNAME) {
pr_err("Requested name filter %s too large, limit to %d\n",
kwork->profile_name, MAX_KWORKNAME - 1);
diff --git a/tools/perf/util/bpf_kwork_top.c b/tools/perf/util/bpf_kwork_top.c
index 035e02272790..22a3b00a1e23 100644
--- a/tools/perf/util/bpf_kwork_top.c
+++ b/tools/perf/util/bpf_kwork_top.c
@@ -122,11 +122,11 @@ static bool valid_kwork_class_type(enum kwork_class_type type)
static int setup_filters(struct perf_kwork *kwork)
{
- u8 val = 1;
- int i, nr_cpus, fd;
- struct perf_cpu_map *map;
-
if (kwork->cpu_list) {
+ int idx, nr_cpus, fd;
+ struct perf_cpu_map *map;
+ struct perf_cpu cpu;
+
fd = bpf_map__fd(skel->maps.kwork_top_cpu_filter);
if (fd < 0) {
pr_debug("Invalid cpu filter fd\n");
@@ -140,8 +140,8 @@ static int setup_filters(struct perf_kwork *kwork)
}
nr_cpus = libbpf_num_possible_cpus();
- for (i = 0; i < perf_cpu_map__nr(map); i++) {
- struct perf_cpu cpu = perf_cpu_map__cpu(map, i);
+ perf_cpu_map__for_each_cpu(cpu, idx, map) {
+ u8 val = 1;
if (cpu.cpu >= nr_cpus) {
perf_cpu_map__put(map);

For part of perf-kwork utility:
Reviewed-and-tested-by: Yang Jihong <yangjihong1@xxxxxxxxxx>

Thanks,
Yang

Next message: Qi Zheng: "[PATCH 1/2] mm: pgtable: add missing flag and statistics for kernel PTE page"
Previous message: Paul Menzel: "Re: [Intel-wired-lan] [PATCH] ice: Add get/set hw address for VF representor ports"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]