![Peter Zijlstra](/assets/img/avatar_default.png)
Minimal userspace interface to the new 'precise' events flag. Can be used like "perf top -e r00c0p" which will use PEBS to sample retired instructions. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: paulus@samba.org Cc: eranian@google.com Cc: robert.richter@amd.com Cc: fweisbec@gmail.com LKML-Reference: <20100304140100.468665803@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
953 lines
21 KiB
C
953 lines
21 KiB
C
#include "../../../include/linux/hw_breakpoint.h"
|
|
#include "util.h"
|
|
#include "../perf.h"
|
|
#include "parse-options.h"
|
|
#include "parse-events.h"
|
|
#include "exec_cmd.h"
|
|
#include "string.h"
|
|
#include "cache.h"
|
|
#include "header.h"
|
|
#include "debugfs.h"
|
|
|
|
int nr_counters;
|
|
|
|
struct perf_event_attr attrs[MAX_COUNTERS];
|
|
char *filters[MAX_COUNTERS];
|
|
|
|
struct event_symbol {
|
|
u8 type;
|
|
u64 config;
|
|
const char *symbol;
|
|
const char *alias;
|
|
};
|
|
|
|
enum event_result {
|
|
EVT_FAILED,
|
|
EVT_HANDLED,
|
|
EVT_HANDLED_ALL
|
|
};
|
|
|
|
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" },
|
|
{ CSW(ALIGNMENT_FAULTS), "alignment-faults", "" },
|
|
{ CSW(EMULATION_FAULTS), "emulation-faults", "" },
|
|
};
|
|
|
|
#define __PERF_EVENT_FIELD(config, name) \
|
|
((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
|
|
|
|
#define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
|
|
#define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
|
|
#define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
|
|
#define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
|
|
|
|
static const char *hw_event_names[] = {
|
|
"cycles",
|
|
"instructions",
|
|
"cache-references",
|
|
"cache-misses",
|
|
"branches",
|
|
"branch-misses",
|
|
"bus-cycles",
|
|
};
|
|
|
|
static const char *sw_event_names[] = {
|
|
"cpu-clock-msecs",
|
|
"task-clock-msecs",
|
|
"page-faults",
|
|
"context-switches",
|
|
"CPU-migrations",
|
|
"minor-faults",
|
|
"major-faults",
|
|
"alignment-faults",
|
|
"emulation-faults",
|
|
};
|
|
|
|
#define MAX_ALIASES 8
|
|
|
|
static const 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 const char *hw_cache_op[][MAX_ALIASES] = {
|
|
{ "load", "loads", "read", },
|
|
{ "store", "stores", "write", },
|
|
{ "prefetch", "prefetches", "speculative-read", "speculative-load", },
|
|
};
|
|
|
|
static const 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) \
|
|
while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
|
|
if (sys_dirent.d_type == DT_DIR && \
|
|
(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) \
|
|
while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
|
|
if (evt_dirent.d_type == DT_DIR && \
|
|
(strcmp(evt_dirent.d_name, ".")) && \
|
|
(strcmp(evt_dirent.d_name, "..")) && \
|
|
(!tp_event_has_id(&sys_dirent, &evt_dirent)))
|
|
|
|
#define MAX_EVENT_LENGTH 512
|
|
|
|
|
|
struct tracepoint_path *tracepoint_id_to_path(u64 config)
|
|
{
|
|
struct tracepoint_path *path = NULL;
|
|
DIR *sys_dir, *evt_dir;
|
|
struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
|
|
char id_buf[4];
|
|
int fd;
|
|
u64 id;
|
|
char evt_path[MAXPATHLEN];
|
|
char dir_path[MAXPATHLEN];
|
|
|
|
if (debugfs_valid_mountpoint(debugfs_path))
|
|
return NULL;
|
|
|
|
sys_dir = opendir(debugfs_path);
|
|
if (!sys_dir)
|
|
return NULL;
|
|
|
|
for_each_subsystem(sys_dir, sys_dirent, sys_next) {
|
|
|
|
snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
|
|
sys_dirent.d_name);
|
|
evt_dir = opendir(dir_path);
|
|
if (!evt_dir)
|
|
continue;
|
|
|
|
for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
|
|
|
|
snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
|
|
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);
|
|
path = zalloc(sizeof(*path));
|
|
path->system = malloc(MAX_EVENT_LENGTH);
|
|
if (!path->system) {
|
|
free(path);
|
|
return NULL;
|
|
}
|
|
path->name = malloc(MAX_EVENT_LENGTH);
|
|
if (!path->name) {
|
|
free(path->system);
|
|
free(path);
|
|
return NULL;
|
|
}
|
|
strncpy(path->system, sys_dirent.d_name,
|
|
MAX_EVENT_LENGTH);
|
|
strncpy(path->name, evt_dirent.d_name,
|
|
MAX_EVENT_LENGTH);
|
|
return path;
|
|
}
|
|
}
|
|
closedir(evt_dir);
|
|
}
|
|
|
|
closedir(sys_dir);
|
|
return NULL;
|
|
}
|
|
|
|
#define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
|
|
static const char *tracepoint_id_to_name(u64 config)
|
|
{
|
|
static char buf[TP_PATH_LEN];
|
|
struct tracepoint_path *path;
|
|
|
|
path = tracepoint_id_to_path(config);
|
|
if (path) {
|
|
snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
|
|
free(path->name);
|
|
free(path->system);
|
|
free(path);
|
|
} else
|
|
snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
|
|
|
|
return buf;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
const char *event_name(int counter)
|
|
{
|
|
u64 config = attrs[counter].config;
|
|
int type = attrs[counter].type;
|
|
|
|
return __event_name(type, config);
|
|
}
|
|
|
|
const 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, const 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 enum event_result
|
|
parse_generic_hw_event(const char **str, struct perf_event_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 EVT_FAILED;
|
|
|
|
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 EVT_HANDLED;
|
|
}
|
|
|
|
static enum event_result
|
|
parse_single_tracepoint_event(char *sys_name,
|
|
const char *evt_name,
|
|
unsigned int evt_length,
|
|
char *flags,
|
|
struct perf_event_attr *attr,
|
|
const char **strp)
|
|
{
|
|
char evt_path[MAXPATHLEN];
|
|
char id_buf[4];
|
|
u64 id;
|
|
int fd;
|
|
|
|
if (flags) {
|
|
if (!strncmp(flags, "record", strlen(flags))) {
|
|
attr->sample_type |= PERF_SAMPLE_RAW;
|
|
attr->sample_type |= PERF_SAMPLE_TIME;
|
|
attr->sample_type |= PERF_SAMPLE_CPU;
|
|
}
|
|
}
|
|
|
|
snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
|
|
sys_name, evt_name);
|
|
|
|
fd = open(evt_path, O_RDONLY);
|
|
if (fd < 0)
|
|
return EVT_FAILED;
|
|
|
|
if (read(fd, id_buf, sizeof(id_buf)) < 0) {
|
|
close(fd);
|
|
return EVT_FAILED;
|
|
}
|
|
|
|
close(fd);
|
|
id = atoll(id_buf);
|
|
attr->config = id;
|
|
attr->type = PERF_TYPE_TRACEPOINT;
|
|
*strp = evt_name + evt_length;
|
|
|
|
return EVT_HANDLED;
|
|
}
|
|
|
|
/* sys + ':' + event + ':' + flags*/
|
|
#define MAX_EVOPT_LEN (MAX_EVENT_LENGTH * 2 + 2 + 128)
|
|
static enum event_result
|
|
parse_multiple_tracepoint_event(char *sys_name, const char *evt_exp,
|
|
char *flags)
|
|
{
|
|
char evt_path[MAXPATHLEN];
|
|
struct dirent *evt_ent;
|
|
DIR *evt_dir;
|
|
|
|
snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
|
|
evt_dir = opendir(evt_path);
|
|
|
|
if (!evt_dir) {
|
|
perror("Can't open event dir");
|
|
return EVT_FAILED;
|
|
}
|
|
|
|
while ((evt_ent = readdir(evt_dir))) {
|
|
char event_opt[MAX_EVOPT_LEN + 1];
|
|
int len;
|
|
|
|
if (!strcmp(evt_ent->d_name, ".")
|
|
|| !strcmp(evt_ent->d_name, "..")
|
|
|| !strcmp(evt_ent->d_name, "enable")
|
|
|| !strcmp(evt_ent->d_name, "filter"))
|
|
continue;
|
|
|
|
if (!strglobmatch(evt_ent->d_name, evt_exp))
|
|
continue;
|
|
|
|
len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
|
|
evt_ent->d_name, flags ? ":" : "",
|
|
flags ?: "");
|
|
if (len < 0)
|
|
return EVT_FAILED;
|
|
|
|
if (parse_events(NULL, event_opt, 0))
|
|
return EVT_FAILED;
|
|
}
|
|
|
|
return EVT_HANDLED_ALL;
|
|
}
|
|
|
|
|
|
static enum event_result parse_tracepoint_event(const char **strp,
|
|
struct perf_event_attr *attr)
|
|
{
|
|
const char *evt_name;
|
|
char *flags;
|
|
char sys_name[MAX_EVENT_LENGTH];
|
|
unsigned int sys_length, evt_length;
|
|
|
|
if (debugfs_valid_mountpoint(debugfs_path))
|
|
return 0;
|
|
|
|
evt_name = strchr(*strp, ':');
|
|
if (!evt_name)
|
|
return EVT_FAILED;
|
|
|
|
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) {
|
|
/* split it out: */
|
|
evt_name = strndup(evt_name, flags - evt_name);
|
|
flags++;
|
|
}
|
|
|
|
evt_length = strlen(evt_name);
|
|
if (evt_length >= MAX_EVENT_LENGTH)
|
|
return EVT_FAILED;
|
|
|
|
if (strpbrk(evt_name, "*?")) {
|
|
*strp = evt_name + evt_length;
|
|
return parse_multiple_tracepoint_event(sys_name, evt_name,
|
|
flags);
|
|
} else
|
|
return parse_single_tracepoint_event(sys_name, evt_name,
|
|
evt_length, flags,
|
|
attr, strp);
|
|
}
|
|
|
|
static enum event_result
|
|
parse_breakpoint_type(const char *type, const char **strp,
|
|
struct perf_event_attr *attr)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
if (!type[i])
|
|
break;
|
|
|
|
switch (type[i]) {
|
|
case 'r':
|
|
attr->bp_type |= HW_BREAKPOINT_R;
|
|
break;
|
|
case 'w':
|
|
attr->bp_type |= HW_BREAKPOINT_W;
|
|
break;
|
|
case 'x':
|
|
attr->bp_type |= HW_BREAKPOINT_X;
|
|
break;
|
|
default:
|
|
return EVT_FAILED;
|
|
}
|
|
}
|
|
if (!attr->bp_type) /* Default */
|
|
attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
|
|
|
|
*strp = type + i;
|
|
|
|
return EVT_HANDLED;
|
|
}
|
|
|
|
static enum event_result
|
|
parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
|
|
{
|
|
const char *target;
|
|
const char *type;
|
|
char *endaddr;
|
|
u64 addr;
|
|
enum event_result err;
|
|
|
|
target = strchr(*strp, ':');
|
|
if (!target)
|
|
return EVT_FAILED;
|
|
|
|
if (strncmp(*strp, "mem", target - *strp) != 0)
|
|
return EVT_FAILED;
|
|
|
|
target++;
|
|
|
|
addr = strtoull(target, &endaddr, 0);
|
|
if (target == endaddr)
|
|
return EVT_FAILED;
|
|
|
|
attr->bp_addr = addr;
|
|
*strp = endaddr;
|
|
|
|
type = strchr(target, ':');
|
|
|
|
/* If no type is defined, just rw as default */
|
|
if (!type) {
|
|
attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
|
|
} else {
|
|
err = parse_breakpoint_type(++type, strp, attr);
|
|
if (err == EVT_FAILED)
|
|
return EVT_FAILED;
|
|
}
|
|
|
|
/* We should find a nice way to override the access type */
|
|
attr->bp_len = HW_BREAKPOINT_LEN_4;
|
|
attr->type = PERF_TYPE_BREAKPOINT;
|
|
|
|
return EVT_HANDLED;
|
|
}
|
|
|
|
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 enum event_result
|
|
parse_symbolic_event(const char **strp, struct perf_event_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 EVT_HANDLED;
|
|
}
|
|
}
|
|
return EVT_FAILED;
|
|
}
|
|
|
|
static enum event_result
|
|
parse_raw_event(const char **strp, struct perf_event_attr *attr)
|
|
{
|
|
const char *str = *strp;
|
|
u64 config;
|
|
int n;
|
|
|
|
if (*str != 'r')
|
|
return EVT_FAILED;
|
|
n = hex2u64(str + 1, &config);
|
|
if (n > 0) {
|
|
if (str[n+1] == 'p') {
|
|
attr->precise = 1;
|
|
n++;
|
|
}
|
|
*strp = str + n + 1;
|
|
attr->type = PERF_TYPE_RAW;
|
|
attr->config = config;
|
|
return EVT_HANDLED;
|
|
}
|
|
return EVT_FAILED;
|
|
}
|
|
|
|
static enum event_result
|
|
parse_numeric_event(const char **strp, struct perf_event_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 EVT_HANDLED;
|
|
}
|
|
}
|
|
return EVT_FAILED;
|
|
}
|
|
|
|
static enum event_result
|
|
parse_event_modifier(const char **strp, struct perf_event_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 enum event_result
|
|
parse_event_symbols(const char **str, struct perf_event_attr *attr)
|
|
{
|
|
enum event_result ret;
|
|
|
|
ret = parse_tracepoint_event(str, attr);
|
|
if (ret != EVT_FAILED)
|
|
goto modifier;
|
|
|
|
ret = parse_raw_event(str, attr);
|
|
if (ret != EVT_FAILED)
|
|
goto modifier;
|
|
|
|
ret = parse_numeric_event(str, attr);
|
|
if (ret != EVT_FAILED)
|
|
goto modifier;
|
|
|
|
ret = parse_symbolic_event(str, attr);
|
|
if (ret != EVT_FAILED)
|
|
goto modifier;
|
|
|
|
ret = parse_generic_hw_event(str, attr);
|
|
if (ret != EVT_FAILED)
|
|
goto modifier;
|
|
|
|
ret = parse_breakpoint_event(str, attr);
|
|
if (ret != EVT_FAILED)
|
|
goto modifier;
|
|
|
|
fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
|
|
fprintf(stderr, "Run 'perf list' for a list of valid events\n");
|
|
return EVT_FAILED;
|
|
|
|
modifier:
|
|
parse_event_modifier(str, attr);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int store_event_type(const char *orgname)
|
|
{
|
|
char filename[PATH_MAX], *c;
|
|
FILE *file;
|
|
int id, n;
|
|
|
|
sprintf(filename, "%s/", debugfs_path);
|
|
strncat(filename, orgname, strlen(orgname));
|
|
strcat(filename, "/id");
|
|
|
|
c = strchr(filename, ':');
|
|
if (c)
|
|
*c = '/';
|
|
|
|
file = fopen(filename, "r");
|
|
if (!file)
|
|
return 0;
|
|
n = fscanf(file, "%i", &id);
|
|
fclose(file);
|
|
if (n < 1) {
|
|
pr_err("cannot store event ID\n");
|
|
return -EINVAL;
|
|
}
|
|
return perf_header__push_event(id, orgname);
|
|
}
|
|
|
|
int parse_events(const struct option *opt __used, const char *str, int unset __used)
|
|
{
|
|
struct perf_event_attr attr;
|
|
enum event_result ret;
|
|
|
|
if (strchr(str, ':'))
|
|
if (store_event_type(str) < 0)
|
|
return -1;
|
|
|
|
for (;;) {
|
|
if (nr_counters == MAX_COUNTERS)
|
|
return -1;
|
|
|
|
memset(&attr, 0, sizeof(attr));
|
|
ret = parse_event_symbols(&str, &attr);
|
|
if (ret == EVT_FAILED)
|
|
return -1;
|
|
|
|
if (!(*str == 0 || *str == ',' || isspace(*str)))
|
|
return -1;
|
|
|
|
if (ret != EVT_HANDLED_ALL) {
|
|
attrs[nr_counters] = attr;
|
|
nr_counters++;
|
|
}
|
|
|
|
if (*str == 0)
|
|
break;
|
|
if (*str == ',')
|
|
++str;
|
|
while (isspace(*str))
|
|
++str;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int parse_filter(const struct option *opt __used, const char *str,
|
|
int unset __used)
|
|
{
|
|
int i = nr_counters - 1;
|
|
int len = strlen(str);
|
|
|
|
if (i < 0 || attrs[i].type != PERF_TYPE_TRACEPOINT) {
|
|
fprintf(stderr,
|
|
"-F option should follow a -e tracepoint option\n");
|
|
return -1;
|
|
}
|
|
|
|
filters[i] = malloc(len + 1);
|
|
if (!filters[i]) {
|
|
fprintf(stderr, "not enough memory to hold filter string\n");
|
|
return -1;
|
|
}
|
|
strcpy(filters[i], str);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char * const event_type_descriptors[] = {
|
|
"Hardware event",
|
|
"Software event",
|
|
"Tracepoint event",
|
|
"Hardware cache event",
|
|
"Raw hardware event descriptor",
|
|
"Hardware breakpoint",
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
char evt_path[MAXPATHLEN];
|
|
char dir_path[MAXPATHLEN];
|
|
|
|
if (debugfs_valid_mountpoint(debugfs_path))
|
|
return;
|
|
|
|
sys_dir = opendir(debugfs_path);
|
|
if (!sys_dir)
|
|
return;
|
|
|
|
for_each_subsystem(sys_dir, sys_dirent, sys_next) {
|
|
|
|
snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
|
|
sys_dirent.d_name);
|
|
evt_dir = opendir(dir_path);
|
|
if (!evt_dir)
|
|
continue;
|
|
|
|
for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
|
|
snprintf(evt_path, MAXPATHLEN, "%s:%s",
|
|
sys_dirent.d_name, evt_dirent.d_name);
|
|
printf(" %-42s [%s]\n", evt_path,
|
|
event_type_descriptors[PERF_TYPE_TRACEPOINT]);
|
|
}
|
|
closedir(evt_dir);
|
|
}
|
|
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];
|
|
|
|
printf("\n");
|
|
printf("List of pre-defined events (to be used in -e):\n");
|
|
|
|
for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
|
|
type = syms->type;
|
|
|
|
if (type != prev_type)
|
|
printf("\n");
|
|
|
|
if (strlen(syms->alias))
|
|
sprintf(name, "%s OR %s", syms->symbol, syms->alias);
|
|
else
|
|
strcpy(name, syms->symbol);
|
|
printf(" %-42s [%s]\n", name,
|
|
event_type_descriptors[type]);
|
|
|
|
prev_type = type;
|
|
}
|
|
|
|
printf("\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++) {
|
|
printf(" %-42s [%s]\n",
|
|
event_cache_name(type, op, i),
|
|
event_type_descriptors[PERF_TYPE_HW_CACHE]);
|
|
}
|
|
}
|
|
}
|
|
|
|
printf("\n");
|
|
printf(" %-42s [%s]\n",
|
|
"rNNN", event_type_descriptors[PERF_TYPE_RAW]);
|
|
printf("\n");
|
|
|
|
printf(" %-42s [%s]\n",
|
|
"mem:<addr>[:access]",
|
|
event_type_descriptors[PERF_TYPE_BREAKPOINT]);
|
|
printf("\n");
|
|
|
|
print_tracepoint_events();
|
|
|
|
exit(129);
|
|
}
|