/*
* BSD LICENSE
*
* Copyright(c) 2014-2020 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* @brief Platform QoS sample COS reset application
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "pqos.h"
/**
* @brief Prints information about cache allocation settings in the system
*
* @param sock_count number of detected CPU sockets
* @param sockets arrays with detected CPU socket id's
* @param cpu_info cpu information structure
*/
static void
print_allocation_config(const struct pqos_capability *cap_l3ca,
const unsigned l3cat_id_count,
const unsigned *l3cat_ids,
const struct pqos_cpuinfo *cpu_info)
{
int ret;
unsigned i;
if (cap_l3ca == NULL)
return;
for (i = 0; i < l3cat_id_count; i++) {
struct pqos_l3ca tab[PQOS_MAX_L3CA_COS];
unsigned num = 0;
ret = pqos_l3ca_get(l3cat_ids[i], PQOS_MAX_L3CA_COS,
&num, tab);
if (ret == PQOS_RETVAL_OK) {
unsigned n = 0;
printf("L3CA COS definitions for Socket %u:\n",
l3cat_ids[i]);
for (n = 0; n < num; n++) {
printf(" L3CA COS%u => MASK 0x%llx\n",
tab[n].class_id,
(unsigned long long)tab[n].u.ways_mask);
}
}
}
for (i = 0; i < l3cat_id_count; i++) {
unsigned *lcores = NULL;
unsigned lcount = 0, n = 0;
lcores = pqos_cpu_get_cores(cpu_info, l3cat_ids[i], &lcount);
if (lcores == NULL || lcount == 0) {
printf("Error retrieving core information!\n");
free(lcores);
return;
}
printf("Core information for socket %u:\n",
l3cat_ids[i]);
for (n = 0; n < lcount; n++) {
unsigned class_id = 0;
int ret1 = PQOS_RETVAL_OK;
if (cap_l3ca != NULL)
ret1 = pqos_alloc_assoc_get(lcores[n],
&class_id);
if (ret1 == PQOS_RETVAL_OK)
printf(" Core %u => COS%u\n",
lcores[n], class_id);
else
printf(" Core %u => ERROR\n",
lcores[n]);
}
free(lcores);
}
}
int main(int argc, char *argv[])
{
struct pqos_config cfg;
const struct pqos_cpuinfo *p_cpu = NULL;
const struct pqos_cap *p_cap = NULL;
const struct pqos_capability *cap_l3ca = NULL;
unsigned l3cat_id_count, *l3cat_ids = NULL;
int ret, exit_val = EXIT_SUCCESS;
memset(&cfg, 0, sizeof(cfg));
cfg.fd_log = STDOUT_FILENO;
cfg.verbose = 0;
/* PQoS Initialization - Check and initialize CAT and CMT capability */
ret = pqos_init(&cfg);
if (ret != PQOS_RETVAL_OK) {
printf("Error initializing PQoS library!\n");
exit_val = EXIT_FAILURE;
goto error_exit;
}
/* Get CMT capability and CPU info pointer */
ret = pqos_cap_get(&p_cap, &p_cpu);
if (ret != PQOS_RETVAL_OK) {
printf("Error retrieving PQoS capabilities!\n");
exit_val = EXIT_FAILURE;
goto error_exit;
}
if (argc == 2 && (!strcmp(argv[1], "-h") || !strcmp(argv[1], "-H"))) {
printf("Usage: %s\n\n", argv[0]);
goto error_exit;
}
/* Reset Api */
ret = pqos_alloc_reset(PQOS_REQUIRE_CDP_ANY, PQOS_REQUIRE_CDP_ANY,
PQOS_MBA_ANY);
if (ret != PQOS_RETVAL_OK)
printf("CAT reset failed!\n");
else
printf("CAT reset successful\n");
/* Get CPU l3cat_id information to set COS */
l3cat_ids = pqos_cpu_get_l3cat_ids(p_cpu, &l3cat_id_count);
if (l3cat_ids == NULL) {
printf("Error retrieving CPU socket information!\n");
exit_val = EXIT_FAILURE;
goto error_exit;
}
(void) pqos_cap_get_type(p_cap, PQOS_CAP_TYPE_L3CA, &cap_l3ca);
/* Print COS and associated cores */
print_allocation_config(cap_l3ca, l3cat_id_count, l3cat_ids, p_cpu);
error_exit:
/* reset and deallocate all the resources */
ret = pqos_fini();
if (ret != PQOS_RETVAL_OK)
printf("Error shutting down PQoS library!\n");
if (l3cat_ids != NULL)
free(l3cat_ids);
return exit_val;
}