blob: 2646ae18d9f9b57b1b050be8844742a045907361 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <api/fs/tracing_path.h>
#include <linux/stddef.h>
#include <linux/perf_event.h>
#include <linux/zalloc.h>
#include <subcmd/pager.h>
#include "build-id.h"
#include "debug.h"
#include "evsel.h"
#include "metricgroup.h"
#include "parse-events.h"
#include "pmu.h"
#include "print-events.h"
#include "probe-file.h"
#include "string2.h"
#include "strlist.h"
#include "tracepoint.h"
#include "pfm.h"
#include "pmu-hybrid.h"
#define MAX_NAME_LEN 100
/** Strings corresponding to enum perf_type_id. */
static const char * const event_type_descriptors[] = {
"Hardware event",
"Software event",
"Tracepoint event",
"Hardware cache event",
"Raw hardware event descriptor",
"Hardware breakpoint",
};
static const struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = {
[PERF_TOOL_DURATION_TIME] = {
.symbol = "duration_time",
.alias = "",
},
[PERF_TOOL_USER_TIME] = {
.symbol = "user_time",
.alias = "",
},
[PERF_TOOL_SYSTEM_TIME] = {
.symbol = "system_time",
.alias = "",
},
};
/*
* Print the events from <debugfs_mount_point>/tracing/events
*/
void print_tracepoint_events(const struct print_callbacks *print_cb, void *print_state)
{
struct dirent **sys_namelist = NULL;
int sys_items = tracing_events__scandir_alphasort(&sys_namelist);
for (int i = 0; i < sys_items; i++) {
struct dirent *sys_dirent = sys_namelist[i];
struct dirent **evt_namelist = NULL;
char *dir_path;
int evt_items;
if (sys_dirent->d_type != DT_DIR ||
!strcmp(sys_dirent->d_name, ".") ||
!strcmp(sys_dirent->d_name, ".."))
continue;
dir_path = get_events_file(sys_dirent->d_name);
if (!dir_path)
continue;
evt_items = scandir(dir_path, &evt_namelist, NULL, alphasort);
for (int j = 0; j < evt_items; j++) {
struct dirent *evt_dirent = evt_namelist[j];
char evt_path[MAXPATHLEN];
if (evt_dirent->d_type != DT_DIR ||
!strcmp(evt_dirent->d_name, ".") ||
!strcmp(evt_dirent->d_name, ".."))
continue;
if (tp_event_has_id(dir_path, evt_dirent) != 0)
continue;
snprintf(evt_path, MAXPATHLEN, "%s:%s",
sys_dirent->d_name, evt_dirent->d_name);
print_cb->print_event(print_state,
/*topic=*/NULL,
/*pmu_name=*/NULL,
evt_path,
/*event_alias=*/NULL,
/*scale_unit=*/NULL,
/*deprecated=*/false,
"Tracepoint event",
/*desc=*/NULL,
/*long_desc=*/NULL,
/*encoding_desc=*/NULL,
/*metric_name=*/NULL,
/*metric_expr=*/NULL);
}
free(dir_path);
free(evt_namelist);
}
free(sys_namelist);
}
void print_sdt_events(const struct print_callbacks *print_cb, void *print_state)
{
struct strlist *bidlist, *sdtlist;
struct str_node *bid_nd, *sdt_name, *next_sdt_name;
const char *last_sdt_name = NULL;
/*
* The implicitly sorted sdtlist will hold the tracepoint name followed
* by @<buildid>. If the tracepoint name is unique (determined by
* looking at the adjacent nodes) the @<buildid> is dropped otherwise
* the executable path and buildid are added to the name.
*/
sdtlist = strlist__new(NULL, NULL);
if (!sdtlist) {
pr_debug("Failed to allocate new strlist for SDT\n");
return;
}
bidlist = build_id_cache__list_all(true);
if (!bidlist) {
pr_debug("Failed to get buildids: %d\n", errno);
return;
}
strlist__for_each_entry(bid_nd, bidlist) {
struct probe_cache *pcache;
struct probe_cache_entry *ent;
pcache = probe_cache__new(bid_nd->s, NULL);
if (!pcache)
continue;
list_for_each_entry(ent, &pcache->entries, node) {
char buf[1024];
snprintf(buf, sizeof(buf), "%s:%s@%s",
ent->pev.group, ent->pev.event, bid_nd->s);
strlist__add(sdtlist, buf);
}
probe_cache__delete(pcache);
}
strlist__delete(bidlist);
strlist__for_each_entry(sdt_name, sdtlist) {
bool show_detail = false;
char *bid = strchr(sdt_name->s, '@');
char *evt_name = NULL;
if (bid)
*(bid++) = '\0';
if (last_sdt_name && !strcmp(last_sdt_name, sdt_name->s)) {
show_detail = true;
} else {
next_sdt_name = strlist__next(sdt_name);
if (next_sdt_name) {
char *bid2 = strchr(next_sdt_name->s, '@');
if (bid2)
*bid2 = '\0';
if (strcmp(sdt_name->s, next_sdt_name->s) == 0)
show_detail = true;
if (bid2)
*bid2 = '@';
}
}
last_sdt_name = sdt_name->s;
if (show_detail) {
char *path = build_id_cache__origname(bid);
if (path) {
if (asprintf(&evt_name, "%s@%s(%.12s)", sdt_name->s, path, bid) < 0)
evt_name = NULL;
free(path);
}
}
print_cb->print_event(print_state,
/*topic=*/NULL,
/*pmu_name=*/NULL,
evt_name ?: sdt_name->s,
/*event_alias=*/NULL,
/*deprecated=*/false,
/*scale_unit=*/NULL,
"SDT event",
/*desc=*/NULL,
/*long_desc=*/NULL,
/*encoding_desc=*/NULL,
/*metric_name=*/NULL,
/*metric_expr=*/NULL);
free(evt_name);
}
strlist__delete(sdtlist);
}
int print_hwcache_events(const struct print_callbacks *print_cb, void *print_state)
{
struct strlist *evt_name_list = strlist__new(NULL, NULL);
struct str_node *nd;
if (!evt_name_list) {
pr_debug("Failed to allocate new strlist for hwcache events\n");
return -ENOMEM;
}
for (int type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
for (int op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
/* skip invalid cache type */
if (!evsel__is_cache_op_valid(type, op))
continue;
for (int i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
struct perf_pmu *pmu = NULL;
char name[64];
__evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
if (!perf_pmu__has_hybrid()) {
if (is_event_supported(PERF_TYPE_HW_CACHE,
type | (op << 8) | (i << 16)))
strlist__add(evt_name_list, name);
continue;
}
perf_pmu__for_each_hybrid_pmu(pmu) {
if (is_event_supported(PERF_TYPE_HW_CACHE,
type | (op << 8) | (i << 16) |
((__u64)pmu->type << PERF_PMU_TYPE_SHIFT))) {
char new_name[128];
snprintf(new_name, sizeof(new_name),
"%s/%s/", pmu->name, name);
strlist__add(evt_name_list, new_name);
}
}
}
}
}
strlist__for_each_entry(nd, evt_name_list) {
print_cb->print_event(print_state,
"cache",
/*pmu_name=*/NULL,
nd->s,
/*event_alias=*/NULL,
/*scale_unit=*/NULL,
/*deprecated=*/false,
event_type_descriptors[PERF_TYPE_HW_CACHE],
/*desc=*/NULL,
/*long_desc=*/NULL,
/*encoding_desc=*/NULL,
/*metric_name=*/NULL,
/*metric_expr=*/NULL);
}
strlist__delete(evt_name_list);
return 0;
}
void print_tool_events(const struct print_callbacks *print_cb, void *print_state)
{
// Start at 1 because the first enum entry means no tool event.
for (int i = 1; i < PERF_TOOL_MAX; ++i) {
print_cb->print_event(print_state,
"tool",
/*pmu_name=*/NULL,
event_symbols_tool[i].symbol,
event_symbols_tool[i].alias,
/*scale_unit=*/NULL,
/*deprecated=*/false,
"Tool event",
/*desc=*/NULL,
/*long_desc=*/NULL,
/*encoding_desc=*/NULL,
/*metric_name=*/NULL,
/*metric_expr=*/NULL);
}
}
void print_symbol_events(const struct print_callbacks *print_cb, void *print_state,
unsigned int type, const struct event_symbol *syms,
unsigned int max)
{
struct strlist *evt_name_list = strlist__new(NULL, NULL);
struct str_node *nd;
if (!evt_name_list) {
pr_debug("Failed to allocate new strlist for symbol events\n");
return;
}
for (unsigned int i = 0; i < max; i++) {
/*
* New attr.config still not supported here, the latest
* example was PERF_COUNT_SW_CGROUP_SWITCHES
*/
if (syms[i].symbol == NULL)
continue;
if (!is_event_supported(type, i))
continue;
if (strlen(syms[i].alias)) {
char name[MAX_NAME_LEN];
snprintf(name, MAX_NAME_LEN, "%s OR %s", syms[i].symbol, syms[i].alias);
strlist__add(evt_name_list, name);
} else
strlist__add(evt_name_list, syms[i].symbol);
}
strlist__for_each_entry(nd, evt_name_list) {
char *alias = strstr(nd->s, " OR ");
if (alias) {
*alias = '\0';
alias += 4;
}
print_cb->print_event(print_state,
/*topic=*/NULL,
/*pmu_name=*/NULL,
nd->s,
alias,
/*scale_unit=*/NULL,
/*deprecated=*/false,
event_type_descriptors[type],
/*desc=*/NULL,
/*long_desc=*/NULL,
/*encoding_desc=*/NULL,
/*metric_name=*/NULL,
/*metric_expr=*/NULL);
}
strlist__delete(evt_name_list);
}
/*
* Print the help text for the event symbols:
*/
void print_events(const struct print_callbacks *print_cb, void *print_state)
{
print_symbol_events(print_cb, print_state, PERF_TYPE_HARDWARE,
event_symbols_hw, PERF_COUNT_HW_MAX);
print_symbol_events(print_cb, print_state, PERF_TYPE_SOFTWARE,
event_symbols_sw, PERF_COUNT_SW_MAX);
print_tool_events(print_cb, print_state);
print_hwcache_events(print_cb, print_state);
print_pmu_events(print_cb, print_state);
print_cb->print_event(print_state,
/*topic=*/NULL,
/*pmu_name=*/NULL,
"rNNN",
/*event_alias=*/NULL,
/*scale_unit=*/NULL,
/*deprecated=*/false,
event_type_descriptors[PERF_TYPE_RAW],
/*desc=*/NULL,
/*long_desc=*/NULL,
/*encoding_desc=*/NULL,
/*metric_name=*/NULL,
/*metric_expr=*/NULL);
print_cb->print_event(print_state,
/*topic=*/NULL,
/*pmu_name=*/NULL,
"cpu/t1=v1[,t2=v2,t3 ...]/modifier",
/*event_alias=*/NULL,
/*scale_unit=*/NULL,
/*deprecated=*/false,
event_type_descriptors[PERF_TYPE_RAW],
"(see 'man perf-list' on how to encode it)",
/*long_desc=*/NULL,
/*encoding_desc=*/NULL,
/*metric_name=*/NULL,
/*metric_expr=*/NULL);
print_cb->print_event(print_state,
/*topic=*/NULL,
/*pmu_name=*/NULL,
"mem:<addr>[/len][:access]",
/*scale_unit=*/NULL,
/*event_alias=*/NULL,
/*deprecated=*/false,
event_type_descriptors[PERF_TYPE_BREAKPOINT],
/*desc=*/NULL,
/*long_desc=*/NULL,
/*encoding_desc=*/NULL,
/*metric_name=*/NULL,
/*metric_expr=*/NULL);
print_tracepoint_events(print_cb, print_state);
print_sdt_events(print_cb, print_state);
metricgroup__print(print_cb, print_state);
print_libpfm_events(print_cb, print_state);
}