summaryrefslogtreecommitdiffstats
path: root/tools/perf/util/parse-events.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/util/parse-events.c')
-rw-r--r--tools/perf/util/parse-events.c682
1 files changed, 682 insertions, 0 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
new file mode 100644
index 00000000000..04417840878
--- /dev/null
+++ b/tools/perf/util/parse-events.c
@@ -0,0 +1,682 @@
+
+#include "../perf.h"
+#include "util.h"
+#include "parse-options.h"
+#include "parse-events.h"
+#include "exec_cmd.h"
+#include "string.h"
+#include "cache.h"
+
+extern char *strcasestr(const char *haystack, const char *needle);
+
+int nr_counters;
+
+struct perf_counter_attr attrs[MAX_COUNTERS];
+
+struct event_symbol {
+ u8 type;
+ u64 config;
+ char *symbol;
+ char *alias;
+};
+
+char debugfs_path[MAXPATHLEN];
+
+#define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
+#define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
+
+static struct event_symbol event_symbols[] = {
+ { CHW(CPU_CYCLES), "cpu-cycles", "cycles" },
+ { CHW(INSTRUCTIONS), "instructions", "" },
+ { CHW(CACHE_REFERENCES), "cache-references", "" },
+ { CHW(CACHE_MISSES), "cache-misses", "" },
+ { CHW(BRANCH_INSTRUCTIONS), "branch-instructions", "branches" },
+ { CHW(BRANCH_MISSES), "branch-misses", "" },
+ { CHW(BUS_CYCLES), "bus-cycles", "" },
+
+ { CSW(CPU_CLOCK), "cpu-clock", "" },
+ { CSW(TASK_CLOCK), "task-clock", "" },
+ { CSW(PAGE_FAULTS), "page-faults", "faults" },
+ { CSW(PAGE_FAULTS_MIN), "minor-faults", "" },
+ { CSW(PAGE_FAULTS_MAJ), "major-faults", "" },
+ { CSW(CONTEXT_SWITCHES), "context-switches", "cs" },
+ { CSW(CPU_MIGRATIONS), "cpu-migrations", "migrations" },
+};
+
+#define __PERF_COUNTER_FIELD(config, name) \
+ ((config & PERF_COUNTER_##name##_MASK) >> PERF_COUNTER_##name##_SHIFT)
+
+#define PERF_COUNTER_RAW(config) __PERF_COUNTER_FIELD(config, RAW)
+#define PERF_COUNTER_CONFIG(config) __PERF_COUNTER_FIELD(config, CONFIG)
+#define PERF_COUNTER_TYPE(config) __PERF_COUNTER_FIELD(config, TYPE)
+#define PERF_COUNTER_ID(config) __PERF_COUNTER_FIELD(config, EVENT)
+
+static char *hw_event_names[] = {
+ "cycles",
+ "instructions",
+ "cache-references",
+ "cache-misses",
+ "branches",
+ "branch-misses",
+ "bus-cycles",
+};
+
+static char *sw_event_names[] = {
+ "cpu-clock-msecs",
+ "task-clock-msecs",
+ "page-faults",
+ "context-switches",
+ "CPU-migrations",
+ "minor-faults",
+ "major-faults",
+};
+
+#define MAX_ALIASES 8
+
+static char *hw_cache[][MAX_ALIASES] = {
+ { "L1-dcache", "l1-d", "l1d", "L1-data", },
+ { "L1-icache", "l1-i", "l1i", "L1-instruction", },
+ { "LLC", "L2" },
+ { "dTLB", "d-tlb", "Data-TLB", },
+ { "iTLB", "i-tlb", "Instruction-TLB", },
+ { "branch", "branches", "bpu", "btb", "bpc", },
+};
+
+static char *hw_cache_op[][MAX_ALIASES] = {
+ { "load", "loads", "read", },
+ { "store", "stores", "write", },
+ { "prefetch", "prefetches", "speculative-read", "speculative-load", },
+};
+
+static char *hw_cache_result[][MAX_ALIASES] = {
+ { "refs", "Reference", "ops", "access", },
+ { "misses", "miss", },
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+#define CACHE_READ (1 << C(OP_READ))
+#define CACHE_WRITE (1 << C(OP_WRITE))
+#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
+#define COP(x) (1 << x)
+
+/*
+ * cache operartion stat
+ * L1I : Read and prefetch only
+ * ITLB and BPU : Read-only
+ */
+static unsigned long hw_cache_stat[C(MAX)] = {
+ [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
+ [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
+ [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
+ [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
+ [C(ITLB)] = (CACHE_READ),
+ [C(BPU)] = (CACHE_READ),
+};
+
+#define for_each_subsystem(sys_dir, sys_dirent, sys_next, file, st) \
+ while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
+ if (snprintf(file, MAXPATHLEN, "%s/%s", debugfs_path, \
+ sys_dirent.d_name) && \
+ (!stat(file, &st)) && (S_ISDIR(st.st_mode)) && \
+ (strcmp(sys_dirent.d_name, ".")) && \
+ (strcmp(sys_dirent.d_name, "..")))
+
+static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
+{
+ char evt_path[MAXPATHLEN];
+ int fd;
+
+ snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
+ sys_dir->d_name, evt_dir->d_name);
+ fd = open(evt_path, O_RDONLY);
+ if (fd < 0)
+ return -EINVAL;
+ close(fd);
+
+ return 0;
+}
+
+#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next, file, st) \
+ while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
+ if (snprintf(file, MAXPATHLEN, "%s/%s/%s", debugfs_path, \
+ sys_dirent.d_name, evt_dirent.d_name) && \
+ (!stat(file, &st)) && (S_ISDIR(st.st_mode)) && \
+ (strcmp(evt_dirent.d_name, ".")) && \
+ (strcmp(evt_dirent.d_name, "..")) && \
+ (!tp_event_has_id(&sys_dirent, &evt_dirent)))
+
+#define MAX_EVENT_LENGTH 30
+
+int valid_debugfs_mount(const char *debugfs)
+{
+ struct statfs st_fs;
+
+ if (statfs(debugfs, &st_fs) < 0)
+ return -ENOENT;
+ else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
+ return -ENOENT;
+ return 0;
+}
+
+static char *tracepoint_id_to_name(u64 config)
+{
+ static char tracepoint_name[2 * MAX_EVENT_LENGTH];
+ DIR *sys_dir, *evt_dir;
+ struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
+ struct stat st;
+ char id_buf[4];
+ int fd;
+ u64 id;
+ char evt_path[MAXPATHLEN];
+
+ if (valid_debugfs_mount(debugfs_path))
+ return "unkown";
+
+ sys_dir = opendir(debugfs_path);
+ if (!sys_dir)
+ goto cleanup;
+
+ for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) {
+ evt_dir = opendir(evt_path);
+ if (!evt_dir)
+ goto cleanup;
+ for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next,
+ evt_path, st) {
+ snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id",
+ debugfs_path, sys_dirent.d_name,
+ evt_dirent.d_name);
+ fd = open(evt_path, O_RDONLY);
+ if (fd < 0)
+ continue;
+ if (read(fd, id_buf, sizeof(id_buf)) < 0) {
+ close(fd);
+ continue;
+ }
+ close(fd);
+ id = atoll(id_buf);
+ if (id == config) {
+ closedir(evt_dir);
+ closedir(sys_dir);
+ snprintf(tracepoint_name, 2 * MAX_EVENT_LENGTH,
+ "%s:%s", sys_dirent.d_name,
+ evt_dirent.d_name);
+ return tracepoint_name;
+ }
+ }
+ closedir(evt_dir);
+ }
+
+cleanup:
+ closedir(sys_dir);
+ return "unkown";
+}
+
+static int is_cache_op_valid(u8 cache_type, u8 cache_op)
+{
+ if (hw_cache_stat[cache_type] & COP(cache_op))
+ return 1; /* valid */
+ else
+ return 0; /* invalid */
+}
+
+static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
+{
+ static char name[50];
+
+ if (cache_result) {
+ sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
+ hw_cache_op[cache_op][0],
+ hw_cache_result[cache_result][0]);
+ } else {
+ sprintf(name, "%s-%s", hw_cache[cache_type][0],
+ hw_cache_op[cache_op][1]);
+ }
+
+ return name;
+}
+
+char *event_name(int counter)
+{
+ u64 config = attrs[counter].config;
+ int type = attrs[counter].type;
+
+ return __event_name(type, config);
+}
+
+char *__event_name(int type, u64 config)
+{
+ static char buf[32];
+
+ if (type == PERF_TYPE_RAW) {
+ sprintf(buf, "raw 0x%llx", config);
+ return buf;
+ }
+
+ switch (type) {
+ case PERF_TYPE_HARDWARE:
+ if (config < PERF_COUNT_HW_MAX)
+ return hw_event_names[config];
+ return "unknown-hardware";
+
+ case PERF_TYPE_HW_CACHE: {
+ u8 cache_type, cache_op, cache_result;
+
+ cache_type = (config >> 0) & 0xff;
+ if (cache_type > PERF_COUNT_HW_CACHE_MAX)
+ return "unknown-ext-hardware-cache-type";
+
+ cache_op = (config >> 8) & 0xff;
+ if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
+ return "unknown-ext-hardware-cache-op";
+
+ cache_result = (config >> 16) & 0xff;
+ if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
+ return "unknown-ext-hardware-cache-result";
+
+ if (!is_cache_op_valid(cache_type, cache_op))
+ return "invalid-cache";
+
+ return event_cache_name(cache_type, cache_op, cache_result);
+ }
+
+ case PERF_TYPE_SOFTWARE:
+ if (config < PERF_COUNT_SW_MAX)
+ return sw_event_names[config];
+ return "unknown-software";
+
+ case PERF_TYPE_TRACEPOINT:
+ return tracepoint_id_to_name(config);
+
+ default:
+ break;
+ }
+
+ return "unknown";
+}
+
+static int parse_aliases(const char **str, char *names[][MAX_ALIASES], int size)
+{
+ int i, j;
+ int n, longest = -1;
+
+ for (i = 0; i < size; i++) {
+ for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
+ n = strlen(names[i][j]);
+ if (n > longest && !strncasecmp(*str, names[i][j], n))
+ longest = n;
+ }
+ if (longest > 0) {
+ *str += longest;
+ return i;
+ }
+ }
+
+ return -1;
+}
+
+static int
+parse_generic_hw_event(const char **str, struct perf_counter_attr *attr)
+{
+ const char *s = *str;
+ int cache_type = -1, cache_op = -1, cache_result = -1;
+
+ cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
+ /*
+ * No fallback - if we cannot get a clear cache type
+ * then bail out:
+ */
+ if (cache_type == -1)
+ return 0;
+
+ while ((cache_op == -1 || cache_result == -1) && *s == '-') {
+ ++s;
+
+ if (cache_op == -1) {
+ cache_op = parse_aliases(&s, hw_cache_op,
+ PERF_COUNT_HW_CACHE_OP_MAX);
+ if (cache_op >= 0) {
+ if (!is_cache_op_valid(cache_type, cache_op))
+ return 0;
+ continue;
+ }
+ }
+
+ if (cache_result == -1) {
+ cache_result = parse_aliases(&s, hw_cache_result,
+ PERF_COUNT_HW_CACHE_RESULT_MAX);
+ if (cache_result >= 0)
+ continue;
+ }
+
+ /*
+ * Can't parse this as a cache op or result, so back up
+ * to the '-'.
+ */
+ --s;
+ break;
+ }
+
+ /*
+ * Fall back to reads:
+ */
+ if (cache_op == -1)
+ cache_op = PERF_COUNT_HW_CACHE_OP_READ;
+
+ /*
+ * Fall back to accesses:
+ */
+ if (cache_result == -1)
+ cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
+
+ attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
+ attr->type = PERF_TYPE_HW_CACHE;
+
+ *str = s;
+ return 1;
+}
+
+static int parse_tracepoint_event(const char **strp,
+ struct perf_counter_attr *attr)
+{
+ const char *evt_name;
+ char *flags;
+ char sys_name[MAX_EVENT_LENGTH];
+ char id_buf[4];
+ int fd;
+ unsigned int sys_length, evt_length;
+ u64 id;
+ char evt_path[MAXPATHLEN];
+
+ if (valid_debugfs_mount(debugfs_path))
+ return 0;
+
+ evt_name = strchr(*strp, ':');
+ if (!evt_name)
+ return 0;
+
+ sys_length = evt_name - *strp;
+ if (sys_length >= MAX_EVENT_LENGTH)
+ return 0;
+
+ strncpy(sys_name, *strp, sys_length);
+ sys_name[sys_length] = '\0';
+ evt_name = evt_name + 1;
+
+ flags = strchr(evt_name, ':');
+ if (flags) {
+ *flags = '\0';
+ flags++;
+ if (!strncmp(flags, "record", strlen(flags)))
+ attr->sample_type |= PERF_SAMPLE_RAW;
+ }
+
+ evt_length = strlen(evt_name);
+ if (evt_length >= MAX_EVENT_LENGTH)
+ return 0;
+
+ snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
+ sys_name, evt_name);
+ fd = open(evt_path, O_RDONLY);
+ if (fd < 0)
+ return 0;
+
+ if (read(fd, id_buf, sizeof(id_buf)) < 0) {
+ close(fd);
+ return 0;
+ }
+ close(fd);
+ id = atoll(id_buf);
+ attr->config = id;
+ attr->type = PERF_TYPE_TRACEPOINT;
+ *strp = evt_name + evt_length;
+ return 1;
+}
+
+static int check_events(const char *str, unsigned int i)
+{
+ int n;
+
+ n = strlen(event_symbols[i].symbol);
+ if (!strncmp(str, event_symbols[i].symbol, n))
+ return n;
+
+ n = strlen(event_symbols[i].alias);
+ if (n)
+ if (!strncmp(str, event_symbols[i].alias, n))
+ return n;
+ return 0;
+}
+
+static int
+parse_symbolic_event(const char **strp, struct perf_counter_attr *attr)
+{
+ const char *str = *strp;
+ unsigned int i;
+ int n;
+
+ for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
+ n = check_events(str, i);
+ if (n > 0) {
+ attr->type = event_symbols[i].type;
+ attr->config = event_symbols[i].config;
+ *strp = str + n;
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int parse_raw_event(const char **strp, struct perf_counter_attr *attr)
+{
+ const char *str = *strp;
+ u64 config;
+ int n;
+
+ if (*str != 'r')
+ return 0;
+ n = hex2u64(str + 1, &config);
+ if (n > 0) {
+ *strp = str + n + 1;
+ attr->type = PERF_TYPE_RAW;
+ attr->config = config;
+ return 1;
+ }
+ return 0;
+}
+
+static int
+parse_numeric_event(const char **strp, struct perf_counter_attr *attr)
+{
+ const char *str = *strp;
+ char *endp;
+ unsigned long type;
+ u64 config;
+
+ type = strtoul(str, &endp, 0);
+ if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
+ str = endp + 1;
+ config = strtoul(str, &endp, 0);
+ if (endp > str) {
+ attr->type = type;
+ attr->config = config;
+ *strp = endp;
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int
+parse_event_modifier(const char **strp, struct perf_counter_attr *attr)
+{
+ const char *str = *strp;
+ int eu = 1, ek = 1, eh = 1;
+
+ if (*str++ != ':')
+ return 0;
+ while (*str) {
+ if (*str == 'u')
+ eu = 0;
+ else if (*str == 'k')
+ ek = 0;
+ else if (*str == 'h')
+ eh = 0;
+ else
+ break;
+ ++str;
+ }
+ if (str >= *strp + 2) {
+ *strp = str;
+ attr->exclude_user = eu;
+ attr->exclude_kernel = ek;
+ attr->exclude_hv = eh;
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Each event can have multiple symbolic names.
+ * Symbolic names are (almost) exactly matched.
+ */
+static int parse_event_symbols(const char **str, struct perf_counter_attr *attr)
+{
+ if (!(parse_tracepoint_event(str, attr) ||
+ parse_raw_event(str, attr) ||
+ parse_numeric_event(str, attr) ||
+ parse_symbolic_event(str, attr) ||
+ parse_generic_hw_event(str, attr)))
+ return 0;
+
+ parse_event_modifier(str, attr);
+
+ return 1;
+}
+
+int parse_events(const struct option *opt __used, const char *str, int unset __used)
+{
+ struct perf_counter_attr attr;
+
+ for (;;) {
+ if (nr_counters == MAX_COUNTERS)
+ return -1;
+
+ memset(&attr, 0, sizeof(attr));
+ if (!parse_event_symbols(&str, &attr))
+ return -1;
+
+ if (!(*str == 0 || *str == ',' || isspace(*str)))
+ return -1;
+
+ attrs[nr_counters] = attr;
+ nr_counters++;
+
+ if (*str == 0)
+ break;
+ if (*str == ',')
+ ++str;
+ while (isspace(*str))
+ ++str;
+ }
+
+ return 0;
+}
+
+static const char * const event_type_descriptors[] = {
+ "",
+ "Hardware event",
+ "Software event",
+ "Tracepoint event",
+ "Hardware cache event",
+};
+
+/*
+ * Print the events from <debugfs_mount_point>/tracing/events
+ */
+
+static void print_tracepoint_events(void)
+{
+ DIR *sys_dir, *evt_dir;
+ struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
+ struct stat st;
+ char evt_path[MAXPATHLEN];
+
+ if (valid_debugfs_mount(debugfs_path))
+ return;
+
+ sys_dir = opendir(debugfs_path);
+ if (!sys_dir)
+ goto cleanup;
+
+ for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) {
+ evt_dir = opendir(evt_path);
+ if (!evt_dir)
+ goto cleanup;
+ for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next,
+ evt_path, st) {
+ snprintf(evt_path, MAXPATHLEN, "%s:%s",
+ sys_dirent.d_name, evt_dirent.d_name);
+ fprintf(stderr, " %-40s [%s]\n", evt_path,
+ event_type_descriptors[PERF_TYPE_TRACEPOINT+1]);
+ }
+ closedir(evt_dir);
+ }
+
+cleanup:
+ closedir(sys_dir);
+}
+
+/*
+ * Print the help text for the event symbols:
+ */
+void print_events(void)
+{
+ struct event_symbol *syms = event_symbols;
+ unsigned int i, type, op, prev_type = -1;
+ char name[40];
+
+ fprintf(stderr, "\n");
+ fprintf(stderr, "List of pre-defined events (to be used in -e):\n");
+
+ for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
+ type = syms->type + 1;
+ if (type >= ARRAY_SIZE(event_type_descriptors))
+ type = 0;
+
+ if (type != prev_type)
+ fprintf(stderr, "\n");
+
+ if (strlen(syms->alias))
+ sprintf(name, "%s OR %s", syms->symbol, syms->alias);
+ else
+ strcpy(name, syms->symbol);
+ fprintf(stderr, " %-40s [%s]\n", name,
+ event_type_descriptors[type]);
+
+ prev_type = type;
+ }
+
+ fprintf(stderr, "\n");
+ for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
+ for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
+ /* skip invalid cache type */
+ if (!is_cache_op_valid(type, op))
+ continue;
+
+ for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
+ fprintf(stderr, " %-40s [%s]\n",
+ event_cache_name(type, op, i),
+ event_type_descriptors[4]);
+ }
+ }
+ }
+
+ fprintf(stderr, "\n");
+ fprintf(stderr, " %-40s [raw hardware event descriptor]\n",
+ "rNNN");
+ fprintf(stderr, "\n");
+
+ print_tracepoint_events();
+
+ exit(129);
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-03-30 19:52:02 +0000