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/*
* Copyright (c) 2018 Ant Financial Services Group.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <pthread.h>
#include <sched.h>
#include <unistd.h>
#include "util.h"
#define NUMA_NODE_PATH "/sys/devices/system/node"
static unsigned
eal_cpu_socket_id(unsigned lcore_id)
{
unsigned socket;
char path[PATH_MAX];
for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) {
snprintf(path, sizeof(path), "%s/node%u/cpu%u", NUMA_NODE_PATH,
socket, lcore_id);
if (access(path, F_OK) == 0)
return socket;
}
return 0;
}
uint32_t
get_socket_id(void)
{
int err;
uint32_t i;
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
err = pthread_getaffinity_np(pthread_self(),
sizeof(cpuset), &cpuset);
if (err)
return 0;
for (i = 0; i < CPU_SETSIZE; i++)
if (CPU_ISSET(i, &cpuset))
break;
return eal_cpu_socket_id(i);
}
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