DPDK  20.11.3
examples/l3fwd-power/perf_core.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2018 Intel Corporation
*/
#include <stdio.h>
#include <string.h>
#include <rte_common.h>
#include <rte_memory.h>
#include <rte_lcore.h>
#include <rte_power.h>
#include <rte_string_fns.h>
#include "perf_core.h"
#include "main.h"
static uint16_t hp_lcores[RTE_MAX_LCORE];
static uint16_t nb_hp_lcores;
struct perf_lcore_params {
uint16_t port_id;
uint8_t queue_id;
uint8_t high_perf;
uint8_t lcore_idx;
static struct perf_lcore_params prf_lc_prms[MAX_LCORE_PARAMS];
static uint16_t nb_prf_lc_prms;
static int
is_hp_core(unsigned int lcore)
{
int ret;
/* do we have power management enabled? */
if (rte_power_get_env() == PM_ENV_NOT_SET) {
/* there's no power management, so just mark it as high perf */
return 1;
}
ret = rte_power_get_capabilities(lcore, &caps);
return ret == 0 && caps.turbo;
}
int
update_lcore_params(void)
{
uint8_t non_perf_lcores[RTE_MAX_LCORE];
uint16_t nb_non_perf_lcores = 0;
int i, j;
/* if perf-config option was not used do nothing */
if (nb_prf_lc_prms == 0)
return 0;
/* if high-perf-cores option was not used query every available core */
if (nb_hp_lcores == 0) {
for (i = 0; i < RTE_MAX_LCORE; i++) {
if (rte_lcore_is_enabled(i) && is_hp_core(i)) {
hp_lcores[nb_hp_lcores] = i;
nb_hp_lcores++;
}
}
}
/* create a list on non high performance cores*/
for (i = 0; i < RTE_MAX_LCORE; i++) {
int hp = 0;
for (j = 0; j < nb_hp_lcores; j++) {
if (hp_lcores[j] == i) {
hp = 1;
break;
}
}
if (!hp)
non_perf_lcores[nb_non_perf_lcores++] = i;
}
}
/* update the lcore config */
for (i = 0; i < nb_prf_lc_prms; i++) {
int lcore = -1;
if (prf_lc_prms[i].high_perf) {
if (prf_lc_prms[i].lcore_idx < nb_hp_lcores)
lcore = hp_lcores[prf_lc_prms[i].lcore_idx];
} else {
if (prf_lc_prms[i].lcore_idx < nb_non_perf_lcores)
lcore =
non_perf_lcores[prf_lc_prms[i].lcore_idx];
}
if (lcore < 0) {
printf("Performance cores configuration error\n");
return -1;
}
lcore_params_array[i].lcore_id = lcore;
lcore_params_array[i].queue_id = prf_lc_prms[i].queue_id;
lcore_params_array[i].port_id = prf_lc_prms[i].port_id;
}
lcore_params = lcore_params_array;
nb_lcore_params = nb_prf_lc_prms;
printf("Updated performance core configuration\n");
for (i = 0; i < nb_prf_lc_prms; i++)
printf("\t(%d,%d,%d)\n", lcore_params[i].port_id,
lcore_params[i].queue_id,
lcore_params[i].lcore_id);
return 0;
}
int
parse_perf_config(const char *q_arg)
{
char s[256];
const char *p, *p0 = q_arg;
char *end;
enum fieldnames {
FLD_PORT = 0,
FLD_QUEUE,
FLD_LCORE_HP,
FLD_LCORE_IDX,
_NUM_FLD
};
unsigned long int_fld[_NUM_FLD];
char *str_fld[_NUM_FLD];
int i;
unsigned int size;
nb_prf_lc_prms = 0;
while ((p = strchr(p0, '(')) != NULL) {
++p;
p0 = strchr(p, ')');
if (p0 == NULL)
return -1;
size = p0 - p;
if (size >= sizeof(s))
return -1;
snprintf(s, sizeof(s), "%.*s", size, p);
if (rte_strsplit(s, sizeof(s), str_fld, _NUM_FLD, ',') !=
_NUM_FLD)
return -1;
for (i = 0; i < _NUM_FLD; i++) {
errno = 0;
int_fld[i] = strtoul(str_fld[i], &end, 0);
if (errno != 0 || end == str_fld[i] || int_fld[i] > 255)
return -1;
}
if (nb_prf_lc_prms >= MAX_LCORE_PARAMS) {
printf("exceeded max number of lcore params: %hu\n",
nb_prf_lc_prms);
return -1;
}
prf_lc_prms[nb_prf_lc_prms].port_id =
(uint8_t)int_fld[FLD_PORT];
prf_lc_prms[nb_prf_lc_prms].queue_id =
(uint8_t)int_fld[FLD_QUEUE];
prf_lc_prms[nb_prf_lc_prms].high_perf =
!!(uint8_t)int_fld[FLD_LCORE_HP];
prf_lc_prms[nb_prf_lc_prms].lcore_idx =
(uint8_t)int_fld[FLD_LCORE_IDX];
++nb_prf_lc_prms;
}
return 0;
}
int
parse_perf_core_list(const char *corelist)
{
int i, idx = 0;
unsigned int count = 0;
char *end = NULL;
int min, max;
if (corelist == NULL) {
printf("invalid core list\n");
return -1;
}
/* Remove all blank characters ahead and after */
while (isblank(*corelist))
corelist++;
i = strlen(corelist);
while ((i > 0) && isblank(corelist[i - 1]))
i--;
/* Get list of cores */
min = RTE_MAX_LCORE;
do {
while (isblank(*corelist))
corelist++;
if (*corelist == '\0')
return -1;
errno = 0;
idx = strtoul(corelist, &end, 10);
if (errno || end == NULL)
return -1;
while (isblank(*end))
end++;
if (*end == '-') {
min = idx;
} else if ((*end == ',') || (*end == '\0')) {
max = idx;
if (min == RTE_MAX_LCORE)
min = idx;
for (idx = min; idx <= max; idx++) {
hp_lcores[count] = idx;
count++;
}
min = RTE_MAX_LCORE;
} else {
printf("invalid core list\n");
return -1;
}
corelist = end + 1;
} while (*end != '\0');
if (count == 0) {
printf("invalid core list\n");
return -1;
}
nb_hp_lcores = count;
printf("Configured %d high performance cores\n", nb_hp_lcores);
for (i = 0; i < nb_hp_lcores; i++)
printf("\tHigh performance core %d %d\n",
i, hp_lcores[i]);
return 0;
}