blob: 404de795ec0bf57f058c96214f89b6edd214344e [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* perf iostat
*
* Copyright (C) 2020, Intel Corporation
*
* Authors: Alexander Antonov <alexander.antonov@linux.intel.com>
*/
#include <api/fs/fs.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <regex.h>
#include "util/cpumap.h"
#include "util/debug.h"
#include "util/iostat.h"
#include "util/counts.h"
#include "path.h"
#ifndef MAX_PATH
#define MAX_PATH 1024
#endif
#define UNCORE_IIO_PMU_PATH "devices/uncore_iio_%d"
#define SYSFS_UNCORE_PMU_PATH "%s/"UNCORE_IIO_PMU_PATH
#define PLATFORM_MAPPING_PATH UNCORE_IIO_PMU_PATH"/die%d"
/*
* Each metric requiries one IIO event which increments at every 4B transfer
* in corresponding direction. The formulas to compute metrics are generic:
* #EventCount * 4B / (1024 * 1024)
*/
static const char * const iostat_metrics[] = {
"Inbound Read(MB)",
"Inbound Write(MB)",
"Outbound Read(MB)",
"Outbound Write(MB)",
};
static inline int iostat_metrics_count(void)
{
return sizeof(iostat_metrics) / sizeof(char *);
}
static const char *iostat_metric_by_idx(int idx)
{
return *(iostat_metrics + idx % iostat_metrics_count());
}
struct iio_root_port {
u32 domain;
u8 bus;
u8 die;
u8 pmu_idx;
int idx;
};
struct iio_root_ports_list {
struct iio_root_port **rps;
int nr_entries;
};
static struct iio_root_ports_list *root_ports;
static void iio_root_port_show(FILE *output,
const struct iio_root_port * const rp)
{
if (output && rp)
fprintf(output, "S%d-uncore_iio_%d<%04x:%02x>\n",
rp->die, rp->pmu_idx, rp->domain, rp->bus);
}
static struct iio_root_port *iio_root_port_new(u32 domain, u8 bus,
u8 die, u8 pmu_idx)
{
struct iio_root_port *p = calloc(1, sizeof(*p));
if (p) {
p->domain = domain;
p->bus = bus;
p->die = die;
p->pmu_idx = pmu_idx;
}
return p;
}
static void iio_root_ports_list_free(struct iio_root_ports_list *list)
{
int idx;
if (list) {
for (idx = 0; idx < list->nr_entries; idx++)
free(list->rps[idx]);
free(list->rps);
free(list);
}
}
static struct iio_root_port *iio_root_port_find_by_notation(
const struct iio_root_ports_list * const list, u32 domain, u8 bus)
{
int idx;
struct iio_root_port *rp;
if (list) {
for (idx = 0; idx < list->nr_entries; idx++) {
rp = list->rps[idx];
if (rp && rp->domain == domain && rp->bus == bus)
return rp;
}
}
return NULL;
}
static int iio_root_ports_list_insert(struct iio_root_ports_list *list,
struct iio_root_port * const rp)
{
struct iio_root_port **tmp_buf;
if (list && rp) {
rp->idx = list->nr_entries++;
tmp_buf = realloc(list->rps,
list->nr_entries * sizeof(*list->rps));
if (!tmp_buf) {
pr_err("Failed to realloc memory\n");
return -ENOMEM;
}
tmp_buf[rp->idx] = rp;
list->rps = tmp_buf;
}
return 0;
}
static int iio_mapping(u8 pmu_idx, struct iio_root_ports_list * const list)
{
char *buf;
char path[MAX_PATH];
u32 domain;
u8 bus;
struct iio_root_port *rp;
size_t size;
int ret;
for (int die = 0; die < cpu__max_node(); die++) {
scnprintf(path, MAX_PATH, PLATFORM_MAPPING_PATH, pmu_idx, die);
if (sysfs__read_str(path, &buf, &size) < 0) {
if (pmu_idx)
goto out;
pr_err("Mode iostat is not supported\n");
return -1;
}
ret = sscanf(buf, "%04x:%02hhx", &domain, &bus);
free(buf);
if (ret != 2) {
pr_err("Invalid mapping data: iio_%d; die%d\n",
pmu_idx, die);
return -1;
}
rp = iio_root_port_new(domain, bus, die, pmu_idx);
if (!rp || iio_root_ports_list_insert(list, rp)) {
free(rp);
return -ENOMEM;
}
}
out:
return 0;
}
static u8 iio_pmu_count(void)
{
u8 pmu_idx = 0;
char path[MAX_PATH];
const char *sysfs = sysfs__mountpoint();
if (sysfs) {
for (;; pmu_idx++) {
snprintf(path, sizeof(path), SYSFS_UNCORE_PMU_PATH,
sysfs, pmu_idx);
if (access(path, F_OK) != 0)
break;
}
}
return pmu_idx;
}
static int iio_root_ports_scan(struct iio_root_ports_list **list)
{
int ret = -ENOMEM;
struct iio_root_ports_list *tmp_list;
u8 pmu_count = iio_pmu_count();
if (!pmu_count) {
pr_err("Unsupported uncore pmu configuration\n");
return -1;
}
tmp_list = calloc(1, sizeof(*tmp_list));
if (!tmp_list)
goto err;
for (u8 pmu_idx = 0; pmu_idx < pmu_count; pmu_idx++) {
ret = iio_mapping(pmu_idx, tmp_list);
if (ret)
break;
}
err:
if (!ret)
*list = tmp_list;
else
iio_root_ports_list_free(tmp_list);
return ret;
}
static int iio_root_port_parse_str(u32 *domain, u8 *bus, char *str)
{
int ret;
regex_t regex;
/*
* Expected format domain:bus:
* Valid domain range [0:ffff]
* Valid bus range [0:ff]
* Example: 0000:af, 0:3d, 01:7
*/
regcomp(&regex, "^([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})", REG_EXTENDED);
ret = regexec(&regex, str, 0, NULL, 0);
if (ret || sscanf(str, "%08x:%02hhx", domain, bus) != 2)
pr_warning("Unrecognized root port format: %s\n"
"Please use the following format:\n"
"\t [domain]:[bus]\n"
"\t for example: 0000:3d\n", str);
regfree(&regex);
return ret;
}
static int iio_root_ports_list_filter(struct iio_root_ports_list **list,
const char *filter)
{
char *tok, *tmp, *filter_copy = NULL;
struct iio_root_port *rp;
u32 domain;
u8 bus;
int ret = -ENOMEM;
struct iio_root_ports_list *tmp_list = calloc(1, sizeof(*tmp_list));
if (!tmp_list)
goto err;
filter_copy = strdup(filter);
if (!filter_copy)
goto err;
for (tok = strtok_r(filter_copy, ",", &tmp); tok;
tok = strtok_r(NULL, ",", &tmp)) {
if (!iio_root_port_parse_str(&domain, &bus, tok)) {
rp = iio_root_port_find_by_notation(*list, domain, bus);
if (rp) {
(*list)->rps[rp->idx] = NULL;
ret = iio_root_ports_list_insert(tmp_list, rp);
if (ret) {
free(rp);
goto err;
}
} else if (!iio_root_port_find_by_notation(tmp_list,
domain, bus))
pr_warning("Root port %04x:%02x were not found\n",
domain, bus);
}
}
if (tmp_list->nr_entries == 0) {
pr_err("Requested root ports were not found\n");
ret = -EINVAL;
}
err:
iio_root_ports_list_free(*list);
if (ret)
iio_root_ports_list_free(tmp_list);
else
*list = tmp_list;
free(filter_copy);
return ret;
}
static int iostat_event_group(struct evlist *evl,
struct iio_root_ports_list *list)
{
int ret;
int idx;
const char *iostat_cmd_template =
"{uncore_iio_%x/event=0x83,umask=0x04,ch_mask=0xF,fc_mask=0x07/,\
uncore_iio_%x/event=0x83,umask=0x01,ch_mask=0xF,fc_mask=0x07/,\
uncore_iio_%x/event=0xc0,umask=0x04,ch_mask=0xF,fc_mask=0x07/,\
uncore_iio_%x/event=0xc0,umask=0x01,ch_mask=0xF,fc_mask=0x07/}";
const int len_template = strlen(iostat_cmd_template) + 1;
struct evsel *evsel = NULL;
int metrics_count = iostat_metrics_count();
char *iostat_cmd = calloc(len_template, 1);
if (!iostat_cmd)
return -ENOMEM;
for (idx = 0; idx < list->nr_entries; idx++) {
sprintf(iostat_cmd, iostat_cmd_template,
list->rps[idx]->pmu_idx, list->rps[idx]->pmu_idx,
list->rps[idx]->pmu_idx, list->rps[idx]->pmu_idx);
ret = parse_event(evl, iostat_cmd);
if (ret)
goto err;
}
evlist__for_each_entry(evl, evsel) {
evsel->priv = list->rps[evsel->core.idx / metrics_count];
}
list->nr_entries = 0;
err:
iio_root_ports_list_free(list);
free(iostat_cmd);
return ret;
}
int iostat_prepare(struct evlist *evlist, struct perf_stat_config *config)
{
if (evlist->core.nr_entries > 0) {
pr_warning("The -e and -M options are not supported."
"All chosen events/metrics will be dropped\n");
evlist__delete(evlist);
evlist = evlist__new();
if (!evlist)
return -ENOMEM;
}
config->metric_only = true;
config->aggr_mode = AGGR_GLOBAL;
return iostat_event_group(evlist, root_ports);
}
int iostat_parse(const struct option *opt, const char *str,
int unset __maybe_unused)
{
int ret;
struct perf_stat_config *config = (struct perf_stat_config *)opt->data;
ret = iio_root_ports_scan(&root_ports);
if (!ret) {
config->iostat_run = true;
if (!str)
iostat_mode = IOSTAT_RUN;
else if (!strcmp(str, "list"))
iostat_mode = IOSTAT_LIST;
else {
iostat_mode = IOSTAT_RUN;
ret = iio_root_ports_list_filter(&root_ports, str);
}
}
return ret;
}
void iostat_list(struct evlist *evlist, struct perf_stat_config *config)
{
struct evsel *evsel;
struct iio_root_port *rp = NULL;
evlist__for_each_entry(evlist, evsel) {
if (rp != evsel->priv) {
rp = evsel->priv;
iio_root_port_show(config->output, rp);
}
}
}
void iostat_release(struct evlist *evlist)
{
struct evsel *evsel;
struct iio_root_port *rp = NULL;
evlist__for_each_entry(evlist, evsel) {
if (rp != evsel->priv) {
rp = evsel->priv;
free(evsel->priv);
}
}
}
void iostat_prefix(struct evlist *evlist,
struct perf_stat_config *config,
char *prefix, struct timespec *ts)
{
struct iio_root_port *rp = evlist->selected->priv;
if (rp) {
if (ts)
sprintf(prefix, "%6lu.%09lu%s%04x:%02x%s",
ts->tv_sec, ts->tv_nsec,
config->csv_sep, rp->domain, rp->bus,
config->csv_sep);
else
sprintf(prefix, "%04x:%02x%s", rp->domain, rp->bus,
config->csv_sep);
}
}
void iostat_print_header_prefix(struct perf_stat_config *config)
{
if (config->csv_output)
fputs("port,", config->output);
else if (config->interval)
fprintf(config->output, "# time port ");
else
fprintf(config->output, " port ");
}
void iostat_print_metric(struct perf_stat_config *config, struct evsel *evsel,
struct perf_stat_output_ctx *out)
{
double iostat_value = 0;
u64 prev_count_val = 0;
const char *iostat_metric = iostat_metric_by_idx(evsel->core.idx);
u8 die = ((struct iio_root_port *)evsel->priv)->die;
struct perf_counts_values *count = perf_counts(evsel->counts, die, 0);
if (count && count->run && count->ena) {
if (evsel->prev_raw_counts && !out->force_header) {
struct perf_counts_values *prev_count =
perf_counts(evsel->prev_raw_counts, die, 0);
prev_count_val = prev_count->val;
prev_count->val = count->val;
}
iostat_value = (count->val - prev_count_val) /
((double) count->run / count->ena);
}
out->print_metric(config, out->ctx, NULL, "%8.0f", iostat_metric,
iostat_value / (256 * 1024));
}
void iostat_print_counters(struct evlist *evlist,
struct perf_stat_config *config, struct timespec *ts,
char *prefix, iostat_print_counter_t print_cnt_cb)
{
void *perf_device = NULL;
struct evsel *counter = evlist__first(evlist);
evlist__set_selected(evlist, counter);
iostat_prefix(evlist, config, prefix, ts);
fprintf(config->output, "%s", prefix);
evlist__for_each_entry(evlist, counter) {
perf_device = evlist->selected->priv;
if (perf_device && perf_device != counter->priv) {
evlist__set_selected(evlist, counter);
iostat_prefix(evlist, config, prefix, ts);
fprintf(config->output, "\n%s", prefix);
}
print_cnt_cb(config, counter, prefix);
}
fputc('\n', config->output);
}