534 lines
12 KiB
C
534 lines
12 KiB
C
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// 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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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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static int cmp_string(const void *a, const void *b)
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{
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const char * const *as = a;
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const char * const *bs = b;
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return strcmp(*as, *bs);
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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 char *subsys_glob,
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const char *event_glob, bool name_only)
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{
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DIR *sys_dir, *evt_dir;
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struct dirent *sys_dirent, *evt_dirent;
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char evt_path[MAXPATHLEN];
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char *dir_path;
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char **evt_list = NULL;
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unsigned int evt_i = 0, evt_num = 0;
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bool evt_num_known = false;
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restart:
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sys_dir = tracing_events__opendir();
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if (!sys_dir)
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return;
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if (evt_num_known) {
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evt_list = zalloc(sizeof(char *) * evt_num);
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if (!evt_list)
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goto out_close_sys_dir;
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}
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for_each_subsystem(sys_dir, sys_dirent) {
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if (subsys_glob != NULL &&
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!strglobmatch(sys_dirent->d_name, subsys_glob))
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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_dir = opendir(dir_path);
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if (!evt_dir)
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goto next;
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for_each_event(dir_path, evt_dir, evt_dirent) {
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if (event_glob != NULL &&
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!strglobmatch(evt_dirent->d_name, event_glob))
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continue;
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if (!evt_num_known) {
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evt_num++;
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continue;
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}
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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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evt_list[evt_i] = strdup(evt_path);
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if (evt_list[evt_i] == NULL) {
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put_events_file(dir_path);
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goto out_close_evt_dir;
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}
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evt_i++;
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}
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closedir(evt_dir);
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next:
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put_events_file(dir_path);
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}
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closedir(sys_dir);
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if (!evt_num_known) {
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evt_num_known = true;
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goto restart;
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}
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qsort(evt_list, evt_num, sizeof(char *), cmp_string);
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evt_i = 0;
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while (evt_i < evt_num) {
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if (name_only) {
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printf("%s ", evt_list[evt_i++]);
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continue;
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}
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printf(" %-50s [%s]\n", evt_list[evt_i++],
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event_type_descriptors[PERF_TYPE_TRACEPOINT]);
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}
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if (evt_num && pager_in_use())
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printf("\n");
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out_free:
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evt_num = evt_i;
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for (evt_i = 0; evt_i < evt_num; evt_i++)
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zfree(&evt_list[evt_i]);
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zfree(&evt_list);
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return;
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out_close_evt_dir:
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closedir(evt_dir);
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out_close_sys_dir:
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closedir(sys_dir);
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printf("FATAL: not enough memory to print %s\n",
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event_type_descriptors[PERF_TYPE_TRACEPOINT]);
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if (evt_list)
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goto out_free;
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}
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void print_sdt_events(const char *subsys_glob, const char *event_glob,
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bool name_only)
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{
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struct probe_cache *pcache;
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struct probe_cache_entry *ent;
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struct strlist *bidlist, *sdtlist;
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struct strlist_config cfg = {.dont_dupstr = true};
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struct str_node *nd, *nd2;
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char *buf, *path, *ptr = NULL;
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bool show_detail = false;
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int ret;
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sdtlist = strlist__new(NULL, &cfg);
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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(nd, bidlist) {
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pcache = probe_cache__new(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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if (!ent->sdt)
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continue;
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if (subsys_glob &&
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!strglobmatch(ent->pev.group, subsys_glob))
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continue;
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if (event_glob &&
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!strglobmatch(ent->pev.event, event_glob))
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continue;
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ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
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ent->pev.event, nd->s);
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if (ret > 0)
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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(nd, sdtlist) {
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buf = strchr(nd->s, '@');
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if (buf)
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*(buf++) = '\0';
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if (name_only) {
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printf("%s ", nd->s);
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continue;
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}
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nd2 = strlist__next(nd);
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if (nd2) {
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ptr = strchr(nd2->s, '@');
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if (ptr)
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*ptr = '\0';
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if (strcmp(nd->s, nd2->s) == 0)
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show_detail = true;
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}
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if (show_detail) {
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path = build_id_cache__origname(buf);
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ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
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if (ret > 0) {
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printf(" %-50s [%s]\n", buf, "SDT event");
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free(buf);
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}
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free(path);
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} else
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printf(" %-50s [%s]\n", nd->s, "SDT event");
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if (nd2) {
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if (strcmp(nd->s, nd2->s) != 0)
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show_detail = false;
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if (ptr)
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*ptr = '@';
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}
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}
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strlist__delete(sdtlist);
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}
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int print_hwcache_events(const char *event_glob, bool name_only)
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{
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unsigned int type, op, i, evt_i = 0, evt_num = 0, npmus = 0;
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char name[64], new_name[128];
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char **evt_list = NULL, **evt_pmus = NULL;
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bool evt_num_known = false;
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struct perf_pmu *pmu = NULL;
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if (perf_pmu__has_hybrid()) {
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npmus = perf_pmu__hybrid_pmu_num();
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evt_pmus = zalloc(sizeof(char *) * npmus);
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if (!evt_pmus)
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goto out_enomem;
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}
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restart:
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if (evt_num_known) {
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evt_list = zalloc(sizeof(char *) * evt_num);
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if (!evt_list)
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goto out_enomem;
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}
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for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
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for (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 (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
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unsigned int hybrid_supported = 0, j;
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bool supported;
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__evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
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if (event_glob != NULL && !strglobmatch(name, event_glob))
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continue;
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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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continue;
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}
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} else {
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perf_pmu__for_each_hybrid_pmu(pmu) {
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if (!evt_num_known) {
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evt_num++;
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continue;
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}
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supported = is_event_supported(
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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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if (supported) {
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snprintf(new_name, sizeof(new_name),
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"%s/%s/", pmu->name, name);
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evt_pmus[hybrid_supported] =
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strdup(new_name);
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hybrid_supported++;
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}
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}
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if (hybrid_supported == 0)
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continue;
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}
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if (!evt_num_known) {
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evt_num++;
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continue;
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}
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if ((hybrid_supported == 0) ||
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(hybrid_supported == npmus)) {
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evt_list[evt_i] = strdup(name);
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if (npmus > 0) {
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for (j = 0; j < npmus; j++)
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zfree(&evt_pmus[j]);
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}
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} else {
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for (j = 0; j < hybrid_supported; j++) {
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evt_list[evt_i++] = evt_pmus[j];
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evt_pmus[j] = NULL;
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}
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continue;
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}
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if (evt_list[evt_i] == NULL)
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goto out_enomem;
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evt_i++;
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}
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}
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}
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if (!evt_num_known) {
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evt_num_known = true;
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goto restart;
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}
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for (evt_i = 0; evt_i < evt_num; evt_i++) {
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if (!evt_list[evt_i])
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break;
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}
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evt_num = evt_i;
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qsort(evt_list, evt_num, sizeof(char *), cmp_string);
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evt_i = 0;
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while (evt_i < evt_num) {
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if (name_only) {
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printf("%s ", evt_list[evt_i++]);
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continue;
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}
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printf(" %-50s [%s]\n", evt_list[evt_i++],
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event_type_descriptors[PERF_TYPE_HW_CACHE]);
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}
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if (evt_num && pager_in_use())
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printf("\n");
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out_free:
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evt_num = evt_i;
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for (evt_i = 0; evt_i < evt_num; evt_i++)
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zfree(&evt_list[evt_i]);
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zfree(&evt_list);
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for (evt_i = 0; evt_i < npmus; evt_i++)
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zfree(&evt_pmus[evt_i]);
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zfree(&evt_pmus);
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return evt_num;
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out_enomem:
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printf("FATAL: not enough memory to print %s\n",
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event_type_descriptors[PERF_TYPE_HW_CACHE]);
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if (evt_list)
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goto out_free;
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return evt_num;
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}
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static void print_tool_event(const struct event_symbol *syms, const char *event_glob,
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bool name_only)
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{
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if (syms->symbol == NULL)
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return;
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if (event_glob && !(strglobmatch(syms->symbol, event_glob) ||
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(syms->alias && strglobmatch(syms->alias, event_glob))))
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return;
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if (name_only)
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printf("%s ", syms->symbol);
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else {
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char name[MAX_NAME_LEN];
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if (syms->alias && strlen(syms->alias))
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snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
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else
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strlcpy(name, syms->symbol, MAX_NAME_LEN);
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printf(" %-50s [%s]\n", name, "Tool event");
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}
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}
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void print_tool_events(const char *event_glob, bool name_only)
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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_tool_event(event_symbols_tool + i, event_glob, name_only);
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if (pager_in_use())
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printf("\n");
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}
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void print_symbol_events(const char *event_glob, unsigned int type,
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struct event_symbol *syms, unsigned int max,
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bool name_only)
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{
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unsigned int i, evt_i = 0, evt_num = 0;
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char name[MAX_NAME_LEN];
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char **evt_list = NULL;
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bool evt_num_known = false;
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restart:
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if (evt_num_known) {
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evt_list = zalloc(sizeof(char *) * evt_num);
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if (!evt_list)
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goto out_enomem;
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syms -= max;
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}
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for (i = 0; i < max; i++, syms++) {
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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->symbol == NULL)
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continue;
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if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) ||
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(syms->alias && strglobmatch(syms->alias, event_glob))))
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continue;
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|
||
|
if (!is_event_supported(type, i))
|
||
|
continue;
|
||
|
|
||
|
if (!evt_num_known) {
|
||
|
evt_num++;
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
if (!name_only && strlen(syms->alias))
|
||
|
snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
|
||
|
else
|
||
|
strlcpy(name, syms->symbol, MAX_NAME_LEN);
|
||
|
|
||
|
evt_list[evt_i] = strdup(name);
|
||
|
if (evt_list[evt_i] == NULL)
|
||
|
goto out_enomem;
|
||
|
evt_i++;
|
||
|
}
|
||
|
|
||
|
if (!evt_num_known) {
|
||
|
evt_num_known = true;
|
||
|
goto restart;
|
||
|
}
|
||
|
qsort(evt_list, evt_num, sizeof(char *), cmp_string);
|
||
|
evt_i = 0;
|
||
|
while (evt_i < evt_num) {
|
||
|
if (name_only) {
|
||
|
printf("%s ", evt_list[evt_i++]);
|
||
|
continue;
|
||
|
}
|
||
|
printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
|
||
|
}
|
||
|
if (evt_num && pager_in_use())
|
||
|
printf("\n");
|
||
|
|
||
|
out_free:
|
||
|
evt_num = evt_i;
|
||
|
for (evt_i = 0; evt_i < evt_num; evt_i++)
|
||
|
zfree(&evt_list[evt_i]);
|
||
|
zfree(&evt_list);
|
||
|
return;
|
||
|
|
||
|
out_enomem:
|
||
|
printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
|
||
|
if (evt_list)
|
||
|
goto out_free;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Print the help text for the event symbols:
|
||
|
*/
|
||
|
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
|
||
|
bool long_desc, bool details_flag, bool deprecated,
|
||
|
const char *pmu_name)
|
||
|
{
|
||
|
print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
|
||
|
event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
|
||
|
|
||
|
print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
|
||
|
event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
|
||
|
print_tool_events(event_glob, name_only);
|
||
|
|
||
|
print_hwcache_events(event_glob, name_only);
|
||
|
|
||
|
print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
|
||
|
details_flag, deprecated, pmu_name);
|
||
|
|
||
|
if (event_glob != NULL)
|
||
|
return;
|
||
|
|
||
|
if (!name_only) {
|
||
|
printf(" %-50s [%s]\n",
|
||
|
"rNNN",
|
||
|
event_type_descriptors[PERF_TYPE_RAW]);
|
||
|
printf(" %-50s [%s]\n",
|
||
|
"cpu/t1=v1[,t2=v2,t3 ...]/modifier",
|
||
|
event_type_descriptors[PERF_TYPE_RAW]);
|
||
|
if (pager_in_use())
|
||
|
printf(" (see 'man perf-list' on how to encode it)\n\n");
|
||
|
|
||
|
printf(" %-50s [%s]\n",
|
||
|
"mem:<addr>[/len][:access]",
|
||
|
event_type_descriptors[PERF_TYPE_BREAKPOINT]);
|
||
|
if (pager_in_use())
|
||
|
printf("\n");
|
||
|
}
|
||
|
|
||
|
print_tracepoint_events(NULL, NULL, name_only);
|
||
|
|
||
|
print_sdt_events(NULL, NULL, name_only);
|
||
|
|
||
|
metricgroup__print(true, true, NULL, name_only, details_flag,
|
||
|
pmu_name);
|
||
|
|
||
|
print_libpfm_events(name_only, long_desc);
|
||
|
}
|