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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 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.
*/
#include <unistd.h>
#include <sys/sysctl.h>
#include <rte_log.h>
#include <rte_eal.h>
#include <rte_lcore.h>
#include <rte_common.h>
#include <rte_debug.h>
#include "eal_private.h"
/* No topology information available on FreeBSD including NUMA info */
#define cpu_core_id(X) 0
#define cpu_socket_id(X) 0
static int
get_ncpus(void)
{
int mib[2] = {CTL_HW, HW_NCPU};
int ncpu;
size_t len = sizeof(ncpu);
sysctl(mib, 2, &ncpu, &len, NULL, 0);
RTE_LOG(INFO, EAL, "Sysctl reports %d cpus\n", ncpu);
return ncpu;
}
/*
* fill the cpu_info structure with as much info as we can get.
* code is similar to linux version, but sadly available info is less.
*/
int
rte_eal_cpu_init(void)
{
/* pointer to global configuration */
struct rte_config *config = rte_eal_get_configuration();
unsigned lcore_id;
unsigned count = 0;
const unsigned ncpus = get_ncpus();
/*
* Parse the maximum set of logical cores, detect the subset of running
* ones and enable them by default.
*/
for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
lcore_config[lcore_id].detected = (lcore_id < ncpus);
if (lcore_config[lcore_id].detected == 0) {
config->lcore_role[lcore_id] = ROLE_OFF;
continue;
}
/* By default, each detected core is enabled */
config->lcore_role[lcore_id] = ROLE_RTE;
lcore_config[lcore_id].core_id = cpu_core_id(lcore_id);
lcore_config[lcore_id].socket_id = cpu_socket_id(lcore_id);
if (lcore_config[lcore_id].socket_id >= RTE_MAX_NUMA_NODES)
#ifdef RTE_EAL_ALLOW_INV_SOCKET_ID
lcore_config[lcore_id].socket_id = 0;
#else
rte_panic("Socket ID (%u) is greater than "
"RTE_MAX_NUMA_NODES (%d)\n",
lcore_config[lcore_id].socket_id, RTE_MAX_NUMA_NODES);
#endif
RTE_LOG(DEBUG, EAL, "Detected lcore %u\n",
lcore_id);
count++;
}
/* Set the count of enabled logical cores of the EAL configuration */
config->lcore_count = count;
RTE_LOG(DEBUG, EAL, "Support maximum %u logical core(s) by configuration.\n",
RTE_MAX_LCORE);
RTE_LOG(DEBUG, EAL, "Detected %u lcore(s)\n", config->lcore_count);
return 0;
}
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