diff options
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/perf/cpumap.c | 2 | ||||
| -rw-r--r-- | tools/lib/perf/evsel.c | 79 | ||||
| -rw-r--r-- | tools/lib/perf/include/perf/cpumap.h | 2 | ||||
| -rw-r--r-- | tools/lib/perf/include/perf/event.h | 50 | ||||
| -rw-r--r-- | tools/lib/perf/include/perf/evsel.h | 4 | ||||
| -rw-r--r-- | tools/lib/perf/tests/test-evsel.c | 161 |
6 files changed, 289 insertions, 9 deletions
diff --git a/tools/lib/perf/cpumap.c b/tools/lib/perf/cpumap.c index 384d5e076ee4..6cd0be7c1bb4 100644 --- a/tools/lib/perf/cpumap.c +++ b/tools/lib/perf/cpumap.c @@ -309,7 +309,7 @@ bool perf_cpu_map__has(const struct perf_cpu_map *cpus, struct perf_cpu cpu) return perf_cpu_map__idx(cpus, cpu) != -1; } -struct perf_cpu perf_cpu_map__max(struct perf_cpu_map *map) +struct perf_cpu perf_cpu_map__max(const struct perf_cpu_map *map) { struct perf_cpu result = { .cpu = -1 diff --git a/tools/lib/perf/evsel.c b/tools/lib/perf/evsel.c index 952f3520d5c2..8ce5bbd09666 100644 --- a/tools/lib/perf/evsel.c +++ b/tools/lib/perf/evsel.c @@ -305,6 +305,9 @@ int perf_evsel__read_size(struct perf_evsel *evsel) if (read_format & PERF_FORMAT_ID) entry += sizeof(u64); + if (read_format & PERF_FORMAT_LOST) + entry += sizeof(u64); + if (read_format & PERF_FORMAT_GROUP) { nr = evsel->nr_members; size += sizeof(u64); @@ -314,24 +317,98 @@ int perf_evsel__read_size(struct perf_evsel *evsel) return size; } +/* This only reads values for the leader */ +static int perf_evsel__read_group(struct perf_evsel *evsel, int cpu_map_idx, + int thread, struct perf_counts_values *count) +{ + size_t size = perf_evsel__read_size(evsel); + int *fd = FD(evsel, cpu_map_idx, thread); + u64 read_format = evsel->attr.read_format; + u64 *data; + int idx = 1; + + if (fd == NULL || *fd < 0) + return -EINVAL; + + data = calloc(1, size); + if (data == NULL) + return -ENOMEM; + + if (readn(*fd, data, size) <= 0) { + free(data); + return -errno; + } + + /* + * This reads only the leader event intentionally since we don't have + * perf counts values for sibling events. + */ + if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) + count->ena = data[idx++]; + if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) + count->run = data[idx++]; + + /* value is always available */ + count->val = data[idx++]; + if (read_format & PERF_FORMAT_ID) + count->id = data[idx++]; + if (read_format & PERF_FORMAT_LOST) + count->lost = data[idx++]; + + free(data); + return 0; +} + +/* + * The perf read format is very flexible. It needs to set the proper + * values according to the read format. + */ +static void perf_evsel__adjust_values(struct perf_evsel *evsel, u64 *buf, + struct perf_counts_values *count) +{ + u64 read_format = evsel->attr.read_format; + int n = 0; + + count->val = buf[n++]; + + if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) + count->ena = buf[n++]; + + if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) + count->run = buf[n++]; + + if (read_format & PERF_FORMAT_ID) + count->id = buf[n++]; + + if (read_format & PERF_FORMAT_LOST) + count->lost = buf[n++]; +} + int perf_evsel__read(struct perf_evsel *evsel, int cpu_map_idx, int thread, struct perf_counts_values *count) { size_t size = perf_evsel__read_size(evsel); int *fd = FD(evsel, cpu_map_idx, thread); + u64 read_format = evsel->attr.read_format; + struct perf_counts_values buf; memset(count, 0, sizeof(*count)); if (fd == NULL || *fd < 0) return -EINVAL; + if (read_format & PERF_FORMAT_GROUP) + return perf_evsel__read_group(evsel, cpu_map_idx, thread, count); + if (MMAP(evsel, cpu_map_idx, thread) && + !(read_format & (PERF_FORMAT_ID | PERF_FORMAT_LOST)) && !perf_mmap__read_self(MMAP(evsel, cpu_map_idx, thread), count)) return 0; - if (readn(*fd, count->values, size) <= 0) + if (readn(*fd, buf.values, size) <= 0) return -errno; + perf_evsel__adjust_values(evsel, buf.values, count); return 0; } diff --git a/tools/lib/perf/include/perf/cpumap.h b/tools/lib/perf/include/perf/cpumap.h index 24de795b09bb..03aceb72a783 100644 --- a/tools/lib/perf/include/perf/cpumap.h +++ b/tools/lib/perf/include/perf/cpumap.h @@ -23,7 +23,7 @@ LIBPERF_API void perf_cpu_map__put(struct perf_cpu_map *map); LIBPERF_API struct perf_cpu perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx); LIBPERF_API int perf_cpu_map__nr(const struct perf_cpu_map *cpus); LIBPERF_API bool perf_cpu_map__empty(const struct perf_cpu_map *map); -LIBPERF_API struct perf_cpu perf_cpu_map__max(struct perf_cpu_map *map); +LIBPERF_API struct perf_cpu perf_cpu_map__max(const struct perf_cpu_map *map); LIBPERF_API bool perf_cpu_map__has(const struct perf_cpu_map *map, struct perf_cpu cpu); #define perf_cpu_map__for_each_cpu(cpu, idx, cpus) \ diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h index 556bb06798f2..93bf93a59c99 100644 --- a/tools/lib/perf/include/perf/event.h +++ b/tools/lib/perf/include/perf/event.h @@ -6,6 +6,7 @@ #include <linux/types.h> #include <linux/limits.h> #include <linux/bpf.h> +#include <linux/compiler.h> #include <sys/types.h> /* pid_t */ #define event_contains(obj, mem) ((obj).header.size > offsetof(typeof(obj), mem)) @@ -76,7 +77,7 @@ struct perf_record_lost_samples { }; /* - * PERF_FORMAT_ENABLED | PERF_FORMAT_RUNNING | PERF_FORMAT_ID + * PERF_FORMAT_ENABLED | PERF_FORMAT_RUNNING | PERF_FORMAT_ID | PERF_FORMAT_LOST */ struct perf_record_read { struct perf_event_header header; @@ -85,6 +86,7 @@ struct perf_record_read { __u64 time_enabled; __u64 time_running; __u64 id; + __u64 lost; }; struct perf_record_throttle { @@ -153,22 +155,60 @@ enum { PERF_CPU_MAP__MASK = 1, }; +/* + * Array encoding of a perf_cpu_map where nr is the number of entries in cpu[] + * and each entry is a value for a CPU in the map. + */ struct cpu_map_entries { __u16 nr; __u16 cpu[]; }; -struct perf_record_record_cpu_map { +/* Bitmap encoding of a perf_cpu_map where bitmap entries are 32-bit. */ +struct perf_record_mask_cpu_map32 { + /* Number of mask values. */ + __u16 nr; + /* Constant 4. */ + __u16 long_size; + /* Bitmap data. */ + __u32 mask[]; +}; + +/* Bitmap encoding of a perf_cpu_map where bitmap entries are 64-bit. */ +struct perf_record_mask_cpu_map64 { + /* Number of mask values. */ __u16 nr; + /* Constant 8. */ __u16 long_size; - unsigned long mask[]; + /* Legacy padding. */ + char __pad[4]; + /* Bitmap data. */ + __u64 mask[]; }; -struct perf_record_cpu_map_data { +/* + * 'struct perf_record_cpu_map_data' is packed as unfortunately an earlier + * version had unaligned data and we wish to retain file format compatibility. + * -irogers + */ +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wpacked" +#pragma GCC diagnostic ignored "-Wattributes" + +struct __packed perf_record_cpu_map_data { __u16 type; - char data[]; + union { + /* Used when type == PERF_CPU_MAP__CPUS. */ + struct cpu_map_entries cpus_data; + /* Used when type == PERF_CPU_MAP__MASK and long_size == 4. */ + struct perf_record_mask_cpu_map32 mask32_data; + /* Used when type == PERF_CPU_MAP__MASK and long_size == 8. */ + struct perf_record_mask_cpu_map64 mask64_data; + }; }; +#pragma GCC diagnostic pop + struct perf_record_cpu_map { struct perf_event_header header; struct perf_record_cpu_map_data data; diff --git a/tools/lib/perf/include/perf/evsel.h b/tools/lib/perf/include/perf/evsel.h index 699c0ed97d34..6f92204075c2 100644 --- a/tools/lib/perf/include/perf/evsel.h +++ b/tools/lib/perf/include/perf/evsel.h @@ -18,8 +18,10 @@ struct perf_counts_values { uint64_t val; uint64_t ena; uint64_t run; + uint64_t id; + uint64_t lost; }; - uint64_t values[3]; + uint64_t values[5]; }; }; diff --git a/tools/lib/perf/tests/test-evsel.c b/tools/lib/perf/tests/test-evsel.c index 89be89afb24d..a11fc51bfb68 100644 --- a/tools/lib/perf/tests/test-evsel.c +++ b/tools/lib/perf/tests/test-evsel.c @@ -1,10 +1,13 @@ // SPDX-License-Identifier: GPL-2.0 #include <stdarg.h> #include <stdio.h> +#include <string.h> #include <linux/perf_event.h> +#include <linux/kernel.h> #include <perf/cpumap.h> #include <perf/threadmap.h> #include <perf/evsel.h> +#include <internal/evsel.h> #include <internal/tests.h> #include "tests.h" @@ -189,6 +192,163 @@ static int test_stat_user_read(int event) return 0; } +static int test_stat_read_format_single(struct perf_event_attr *attr, struct perf_thread_map *threads) +{ + struct perf_evsel *evsel; + struct perf_counts_values counts; + volatile int count = 0x100000; + int err; + + evsel = perf_evsel__new(attr); + __T("failed to create evsel", evsel); + + /* skip old kernels that don't support the format */ + err = perf_evsel__open(evsel, NULL, threads); + if (err < 0) + return 0; + + while (count--) ; + + memset(&counts, -1, sizeof(counts)); + perf_evsel__read(evsel, 0, 0, &counts); + + __T("failed to read value", counts.val); + if (attr->read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) + __T("failed to read TOTAL_TIME_ENABLED", counts.ena); + if (attr->read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) + __T("failed to read TOTAL_TIME_RUNNING", counts.run); + if (attr->read_format & PERF_FORMAT_ID) + __T("failed to read ID", counts.id); + if (attr->read_format & PERF_FORMAT_LOST) + __T("failed to read LOST", counts.lost == 0); + + perf_evsel__close(evsel); + perf_evsel__delete(evsel); + return 0; +} + +static int test_stat_read_format_group(struct perf_event_attr *attr, struct perf_thread_map *threads) +{ + struct perf_evsel *leader, *member; + struct perf_counts_values counts; + volatile int count = 0x100000; + int err; + + attr->read_format |= PERF_FORMAT_GROUP; + leader = perf_evsel__new(attr); + __T("failed to create leader", leader); + + attr->read_format &= ~PERF_FORMAT_GROUP; + member = perf_evsel__new(attr); + __T("failed to create member", member); + + member->leader = leader; + leader->nr_members = 2; + + /* skip old kernels that don't support the format */ + err = perf_evsel__open(leader, NULL, threads); + if (err < 0) + return 0; + err = perf_evsel__open(member, NULL, threads); + if (err < 0) + return 0; + + while (count--) ; + + memset(&counts, -1, sizeof(counts)); + perf_evsel__read(leader, 0, 0, &counts); + + __T("failed to read leader value", counts.val); + if (attr->read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) + __T("failed to read leader TOTAL_TIME_ENABLED", counts.ena); + if (attr->read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) + __T("failed to read leader TOTAL_TIME_RUNNING", counts.run); + if (attr->read_format & PERF_FORMAT_ID) + __T("failed to read leader ID", counts.id); + if (attr->read_format & PERF_FORMAT_LOST) + __T("failed to read leader LOST", counts.lost == 0); + + memset(&counts, -1, sizeof(counts)); + perf_evsel__read(member, 0, 0, &counts); + + __T("failed to read member value", counts.val); + if (attr->read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) + __T("failed to read member TOTAL_TIME_ENABLED", counts.ena); + if (attr->read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) + __T("failed to read member TOTAL_TIME_RUNNING", counts.run); + if (attr->read_format & PERF_FORMAT_ID) + __T("failed to read member ID", counts.id); + if (attr->read_format & PERF_FORMAT_LOST) + __T("failed to read member LOST", counts.lost == 0); + + perf_evsel__close(member); + perf_evsel__close(leader); + perf_evsel__delete(member); + perf_evsel__delete(leader); + return 0; +} + +static int test_stat_read_format(void) +{ + struct perf_thread_map *threads; + struct perf_event_attr attr = { + .type = PERF_TYPE_SOFTWARE, + .config = PERF_COUNT_SW_TASK_CLOCK, + }; + int err, i; + +#define FMT(_fmt) PERF_FORMAT_ ## _fmt +#define FMT_TIME (FMT(TOTAL_TIME_ENABLED) | FMT(TOTAL_TIME_RUNNING)) + + uint64_t test_formats [] = { + 0, + FMT_TIME, + FMT(ID), + FMT(LOST), + FMT_TIME | FMT(ID), + FMT_TIME | FMT(LOST), + FMT_TIME | FMT(ID) | FMT(LOST), + FMT(ID) | FMT(LOST), + }; + +#undef FMT +#undef FMT_TIME + + threads = perf_thread_map__new_dummy(); + __T("failed to create threads", threads); + + perf_thread_map__set_pid(threads, 0, 0); + + for (i = 0; i < (int)ARRAY_SIZE(test_formats); i++) { + attr.read_format = test_formats[i]; + __T_VERBOSE("testing single read with read_format: %lx\n", + (unsigned long)test_formats[i]); + + err = test_stat_read_format_single(&attr, threads); + __T("failed to read single format", err == 0); + } + + perf_thread_map__put(threads); + + threads = perf_thread_map__new_array(2, NULL); + __T("failed to create threads", threads); + + perf_thread_map__set_pid(threads, 0, 0); + perf_thread_map__set_pid(threads, 1, 0); + + for (i = 0; i < (int)ARRAY_SIZE(test_formats); i++) { + attr.read_format = test_formats[i]; + __T_VERBOSE("testing group read with read_format: %lx\n", + (unsigned long)test_formats[i]); + + err = test_stat_read_format_group(&attr, threads); + __T("failed to read group format", err == 0); + } + + perf_thread_map__put(threads); + return 0; +} + int test_evsel(int argc, char **argv) { __T_START; @@ -200,6 +360,7 @@ int test_evsel(int argc, char **argv) test_stat_thread_enable(); test_stat_user_read(PERF_COUNT_HW_INSTRUCTIONS); test_stat_user_read(PERF_COUNT_HW_CPU_CYCLES); + test_stat_read_format(); __T_END; return tests_failed == 0 ? 0 : -1; |