391 lines
9.6 KiB
C
391 lines
9.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <dirent.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/param.h>
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#include <api/fs/tracing_path.h>
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#include <linux/stddef.h>
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#include <linux/perf_event.h>
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#include <linux/zalloc.h>
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#include <subcmd/pager.h>
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#include "build-id.h"
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#include "debug.h"
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#include "evsel.h"
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#include "metricgroup.h"
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#include "parse-events.h"
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#include "pmu.h"
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#include "print-events.h"
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#include "probe-file.h"
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#include "string2.h"
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#include "strlist.h"
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#include "tracepoint.h"
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#include "pfm.h"
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#include "pmu-hybrid.h"
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#define MAX_NAME_LEN 100
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/** Strings corresponding to enum perf_type_id. */
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static const char * const event_type_descriptors[] = {
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"Hardware event",
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"Software event",
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"Tracepoint event",
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"Hardware cache event",
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"Raw hardware event descriptor",
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"Hardware breakpoint",
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};
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static const struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = {
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[PERF_TOOL_DURATION_TIME] = {
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.symbol = "duration_time",
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.alias = "",
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},
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[PERF_TOOL_USER_TIME] = {
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.symbol = "user_time",
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.alias = "",
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},
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[PERF_TOOL_SYSTEM_TIME] = {
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.symbol = "system_time",
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.alias = "",
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},
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};
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/*
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* Print the events from <debugfs_mount_point>/tracing/events
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*/
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void print_tracepoint_events(const struct print_callbacks *print_cb, void *print_state)
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{
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struct dirent **sys_namelist = NULL;
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int sys_items = tracing_events__scandir_alphasort(&sys_namelist);
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for (int i = 0; i < sys_items; i++) {
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struct dirent *sys_dirent = sys_namelist[i];
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struct dirent **evt_namelist = NULL;
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char *dir_path;
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int evt_items;
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if (sys_dirent->d_type != DT_DIR ||
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!strcmp(sys_dirent->d_name, ".") ||
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!strcmp(sys_dirent->d_name, ".."))
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continue;
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dir_path = get_events_file(sys_dirent->d_name);
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if (!dir_path)
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continue;
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evt_items = scandir(dir_path, &evt_namelist, NULL, alphasort);
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for (int j = 0; j < evt_items; j++) {
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struct dirent *evt_dirent = evt_namelist[j];
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char evt_path[MAXPATHLEN];
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if (evt_dirent->d_type != DT_DIR ||
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!strcmp(evt_dirent->d_name, ".") ||
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!strcmp(evt_dirent->d_name, ".."))
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continue;
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if (tp_event_has_id(dir_path, evt_dirent) != 0)
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continue;
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snprintf(evt_path, MAXPATHLEN, "%s:%s",
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sys_dirent->d_name, evt_dirent->d_name);
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print_cb->print_event(print_state,
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/*topic=*/NULL,
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/*pmu_name=*/NULL,
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evt_path,
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/*event_alias=*/NULL,
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/*scale_unit=*/NULL,
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/*deprecated=*/false,
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"Tracepoint event",
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/*desc=*/NULL,
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/*long_desc=*/NULL,
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/*encoding_desc=*/NULL);
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}
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free(dir_path);
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free(evt_namelist);
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}
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free(sys_namelist);
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}
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void print_sdt_events(const struct print_callbacks *print_cb, void *print_state)
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{
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struct strlist *bidlist, *sdtlist;
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struct str_node *bid_nd, *sdt_name, *next_sdt_name;
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const char *last_sdt_name = NULL;
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/*
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* The implicitly sorted sdtlist will hold the tracepoint name followed
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* by @<buildid>. If the tracepoint name is unique (determined by
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* looking at the adjacent nodes) the @<buildid> is dropped otherwise
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* the executable path and buildid are added to the name.
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*/
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sdtlist = strlist__new(NULL, NULL);
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if (!sdtlist) {
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pr_debug("Failed to allocate new strlist for SDT\n");
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return;
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}
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bidlist = build_id_cache__list_all(true);
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if (!bidlist) {
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pr_debug("Failed to get buildids: %d\n", errno);
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return;
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}
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strlist__for_each_entry(bid_nd, bidlist) {
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struct probe_cache *pcache;
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struct probe_cache_entry *ent;
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pcache = probe_cache__new(bid_nd->s, NULL);
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if (!pcache)
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continue;
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list_for_each_entry(ent, &pcache->entries, node) {
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char buf[1024];
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snprintf(buf, sizeof(buf), "%s:%s@%s",
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ent->pev.group, ent->pev.event, bid_nd->s);
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strlist__add(sdtlist, buf);
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}
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probe_cache__delete(pcache);
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}
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strlist__delete(bidlist);
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strlist__for_each_entry(sdt_name, sdtlist) {
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bool show_detail = false;
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char *bid = strchr(sdt_name->s, '@');
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char *evt_name = NULL;
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if (bid)
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*(bid++) = '\0';
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if (last_sdt_name && !strcmp(last_sdt_name, sdt_name->s)) {
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show_detail = true;
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} else {
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next_sdt_name = strlist__next(sdt_name);
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if (next_sdt_name) {
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char *bid2 = strchr(next_sdt_name->s, '@');
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if (bid2)
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*bid2 = '\0';
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if (strcmp(sdt_name->s, next_sdt_name->s) == 0)
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show_detail = true;
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if (bid2)
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*bid2 = '@';
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}
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}
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last_sdt_name = sdt_name->s;
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if (show_detail) {
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char *path = build_id_cache__origname(bid);
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if (path) {
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if (asprintf(&evt_name, "%s@%s(%.12s)", sdt_name->s, path, bid) < 0)
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evt_name = NULL;
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free(path);
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}
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}
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print_cb->print_event(print_state,
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/*topic=*/NULL,
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/*pmu_name=*/NULL,
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evt_name ?: sdt_name->s,
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/*event_alias=*/NULL,
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/*deprecated=*/false,
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/*scale_unit=*/NULL,
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"SDT event",
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/*desc=*/NULL,
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/*long_desc=*/NULL,
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/*encoding_desc=*/NULL);
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free(evt_name);
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}
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strlist__delete(sdtlist);
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}
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int print_hwcache_events(const struct print_callbacks *print_cb, void *print_state)
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{
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struct strlist *evt_name_list = strlist__new(NULL, NULL);
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struct str_node *nd;
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if (!evt_name_list) {
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pr_debug("Failed to allocate new strlist for hwcache events\n");
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return -ENOMEM;
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}
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for (int type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
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for (int op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
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/* skip invalid cache type */
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if (!evsel__is_cache_op_valid(type, op))
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continue;
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for (int i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
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struct perf_pmu *pmu = NULL;
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char name[64];
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__evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
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if (!perf_pmu__has_hybrid()) {
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if (is_event_supported(PERF_TYPE_HW_CACHE,
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type | (op << 8) | (i << 16)))
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strlist__add(evt_name_list, name);
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continue;
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}
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perf_pmu__for_each_hybrid_pmu(pmu) {
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if (is_event_supported(PERF_TYPE_HW_CACHE,
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type | (op << 8) | (i << 16) |
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((__u64)pmu->type << PERF_PMU_TYPE_SHIFT))) {
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char new_name[128];
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snprintf(new_name, sizeof(new_name),
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"%s/%s/", pmu->name, name);
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strlist__add(evt_name_list, new_name);
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}
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}
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}
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}
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}
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strlist__for_each_entry(nd, evt_name_list) {
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print_cb->print_event(print_state,
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"cache",
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/*pmu_name=*/NULL,
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nd->s,
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/*event_alias=*/NULL,
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/*scale_unit=*/NULL,
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/*deprecated=*/false,
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event_type_descriptors[PERF_TYPE_HW_CACHE],
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/*desc=*/NULL,
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/*long_desc=*/NULL,
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/*encoding_desc=*/NULL);
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}
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strlist__delete(evt_name_list);
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return 0;
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}
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void print_tool_events(const struct print_callbacks *print_cb, void *print_state)
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{
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// Start at 1 because the first enum entry means no tool event.
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for (int i = 1; i < PERF_TOOL_MAX; ++i) {
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print_cb->print_event(print_state,
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"tool",
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/*pmu_name=*/NULL,
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event_symbols_tool[i].symbol,
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event_symbols_tool[i].alias,
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/*scale_unit=*/NULL,
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/*deprecated=*/false,
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"Tool event",
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/*desc=*/NULL,
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/*long_desc=*/NULL,
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/*encoding_desc=*/NULL);
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}
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}
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void print_symbol_events(const struct print_callbacks *print_cb, void *print_state,
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unsigned int type, const struct event_symbol *syms,
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unsigned int max)
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{
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struct strlist *evt_name_list = strlist__new(NULL, NULL);
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struct str_node *nd;
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if (!evt_name_list) {
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pr_debug("Failed to allocate new strlist for symbol events\n");
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return;
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}
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for (unsigned int i = 0; i < max; i++) {
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/*
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* New attr.config still not supported here, the latest
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* example was PERF_COUNT_SW_CGROUP_SWITCHES
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*/
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if (syms[i].symbol == NULL)
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continue;
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if (!is_event_supported(type, i))
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continue;
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if (strlen(syms[i].alias)) {
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char name[MAX_NAME_LEN];
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snprintf(name, MAX_NAME_LEN, "%s OR %s", syms[i].symbol, syms[i].alias);
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strlist__add(evt_name_list, name);
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} else
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strlist__add(evt_name_list, syms[i].symbol);
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}
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strlist__for_each_entry(nd, evt_name_list) {
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char *alias = strstr(nd->s, " OR ");
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if (alias) {
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*alias = '\0';
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alias += 4;
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}
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print_cb->print_event(print_state,
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/*topic=*/NULL,
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/*pmu_name=*/NULL,
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nd->s,
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alias,
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/*scale_unit=*/NULL,
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/*deprecated=*/false,
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event_type_descriptors[type],
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/*desc=*/NULL,
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/*long_desc=*/NULL,
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/*encoding_desc=*/NULL);
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}
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strlist__delete(evt_name_list);
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}
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/*
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* Print the help text for the event symbols:
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*/
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void print_events(const struct print_callbacks *print_cb, void *print_state)
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{
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print_symbol_events(print_cb, print_state, PERF_TYPE_HARDWARE,
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event_symbols_hw, PERF_COUNT_HW_MAX);
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print_symbol_events(print_cb, print_state, PERF_TYPE_SOFTWARE,
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event_symbols_sw, PERF_COUNT_SW_MAX);
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print_tool_events(print_cb, print_state);
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print_hwcache_events(print_cb, print_state);
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print_pmu_events(print_cb, print_state);
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print_cb->print_event(print_state,
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/*topic=*/NULL,
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/*pmu_name=*/NULL,
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"rNNN",
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/*event_alias=*/NULL,
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/*scale_unit=*/NULL,
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/*deprecated=*/false,
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event_type_descriptors[PERF_TYPE_RAW],
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/*desc=*/NULL,
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/*long_desc=*/NULL,
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/*encoding_desc=*/NULL);
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print_cb->print_event(print_state,
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/*topic=*/NULL,
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/*pmu_name=*/NULL,
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"cpu/t1=v1[,t2=v2,t3 ...]/modifier",
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/*event_alias=*/NULL,
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/*scale_unit=*/NULL,
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/*deprecated=*/false,
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event_type_descriptors[PERF_TYPE_RAW],
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"(see 'man perf-list' on how to encode it)",
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/*long_desc=*/NULL,
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/*encoding_desc=*/NULL);
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print_cb->print_event(print_state,
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/*topic=*/NULL,
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/*pmu_name=*/NULL,
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"mem:<addr>[/len][:access]",
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/*scale_unit=*/NULL,
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/*event_alias=*/NULL,
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/*deprecated=*/false,
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event_type_descriptors[PERF_TYPE_BREAKPOINT],
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/*desc=*/NULL,
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/*long_desc=*/NULL,
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/*encoding_desc=*/NULL);
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print_tracepoint_events(print_cb, print_state);
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print_sdt_events(print_cb, print_state);
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metricgroup__print(print_cb, print_state);
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print_libpfm_events(print_cb, print_state);
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}
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