Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: [PATCH v2 8/8] perf cpumap: Use perf_cpu_map__for_each_cpu when possible | From | Yang Jihong <> | Date | Thu, 1 Feb 2024 16:03:39 +0800 |
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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@google.com> > Reviewed-by: James Clark <james.clark@arm.com> > --- > 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@huawei.com>
Thanks, Yang
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