a083f8cc77
Since the kernel modules are moved to kernel/ directory, there is no need anymore for the sub-directory eal/ in linux/, freebsd/ and windows/. Signed-off-by: Thomas Monjalon <thomas@monjalon.net> Acked-by: David Marchand <david.marchand@redhat.com>
178 lines
4 KiB
C
178 lines
4 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <sched.h>
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#include <pthread_np.h>
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#include <sys/queue.h>
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#include <sys/thr.h>
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#include <rte_debug.h>
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#include <rte_atomic.h>
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#include <rte_launch.h>
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#include <rte_log.h>
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#include <rte_memory.h>
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#include <rte_per_lcore.h>
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#include <rte_eal.h>
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#include <rte_lcore.h>
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#include "eal_private.h"
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#include "eal_thread.h"
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RTE_DEFINE_PER_LCORE(unsigned, _lcore_id) = LCORE_ID_ANY;
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RTE_DEFINE_PER_LCORE(unsigned, _socket_id) = (unsigned)SOCKET_ID_ANY;
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RTE_DEFINE_PER_LCORE(rte_cpuset_t, _cpuset);
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/*
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* Send a message to a slave lcore identified by slave_id to call a
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* function f with argument arg. Once the execution is done, the
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* remote lcore switch in FINISHED state.
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*/
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int
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rte_eal_remote_launch(int (*f)(void *), void *arg, unsigned slave_id)
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{
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int n;
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char c = 0;
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int m2s = lcore_config[slave_id].pipe_master2slave[1];
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int s2m = lcore_config[slave_id].pipe_slave2master[0];
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if (lcore_config[slave_id].state != WAIT)
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return -EBUSY;
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lcore_config[slave_id].f = f;
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lcore_config[slave_id].arg = arg;
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/* send message */
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n = 0;
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while (n == 0 || (n < 0 && errno == EINTR))
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n = write(m2s, &c, 1);
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if (n < 0)
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rte_panic("cannot write on configuration pipe\n");
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/* wait ack */
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do {
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n = read(s2m, &c, 1);
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} while (n < 0 && errno == EINTR);
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if (n <= 0)
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rte_panic("cannot read on configuration pipe\n");
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return 0;
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}
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/* set affinity for current thread */
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static int
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eal_thread_set_affinity(void)
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{
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unsigned lcore_id = rte_lcore_id();
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/* acquire system unique id */
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rte_gettid();
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/* update EAL thread core affinity */
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return rte_thread_set_affinity(&lcore_config[lcore_id].cpuset);
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}
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void eal_thread_init_master(unsigned lcore_id)
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{
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/* set the lcore ID in per-lcore memory area */
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RTE_PER_LCORE(_lcore_id) = lcore_id;
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/* set CPU affinity */
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if (eal_thread_set_affinity() < 0)
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rte_panic("cannot set affinity\n");
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}
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/* main loop of threads */
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__attribute__((noreturn)) void *
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eal_thread_loop(__attribute__((unused)) void *arg)
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{
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char c;
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int n, ret;
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unsigned lcore_id;
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pthread_t thread_id;
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int m2s, s2m;
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char cpuset[RTE_CPU_AFFINITY_STR_LEN];
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thread_id = pthread_self();
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/* retrieve our lcore_id from the configuration structure */
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RTE_LCORE_FOREACH_SLAVE(lcore_id) {
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if (thread_id == lcore_config[lcore_id].thread_id)
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break;
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}
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if (lcore_id == RTE_MAX_LCORE)
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rte_panic("cannot retrieve lcore id\n");
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m2s = lcore_config[lcore_id].pipe_master2slave[0];
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s2m = lcore_config[lcore_id].pipe_slave2master[1];
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/* set the lcore ID in per-lcore memory area */
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RTE_PER_LCORE(_lcore_id) = lcore_id;
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/* set CPU affinity */
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if (eal_thread_set_affinity() < 0)
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rte_panic("cannot set affinity\n");
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ret = eal_thread_dump_affinity(cpuset, sizeof(cpuset));
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RTE_LOG(DEBUG, EAL, "lcore %u is ready (tid=%p;cpuset=[%s%s])\n",
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lcore_id, thread_id, cpuset, ret == 0 ? "" : "...");
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/* read on our pipe to get commands */
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while (1) {
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void *fct_arg;
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/* wait command */
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do {
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n = read(m2s, &c, 1);
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} while (n < 0 && errno == EINTR);
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if (n <= 0)
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rte_panic("cannot read on configuration pipe\n");
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lcore_config[lcore_id].state = RUNNING;
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/* send ack */
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n = 0;
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while (n == 0 || (n < 0 && errno == EINTR))
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n = write(s2m, &c, 1);
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if (n < 0)
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rte_panic("cannot write on configuration pipe\n");
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if (lcore_config[lcore_id].f == NULL)
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rte_panic("NULL function pointer\n");
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/* call the function and store the return value */
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fct_arg = lcore_config[lcore_id].arg;
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ret = lcore_config[lcore_id].f(fct_arg);
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lcore_config[lcore_id].ret = ret;
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rte_wmb();
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lcore_config[lcore_id].state = FINISHED;
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}
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/* never reached */
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/* pthread_exit(NULL); */
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/* return NULL; */
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}
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/* require calling thread tid by gettid() */
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int rte_sys_gettid(void)
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{
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long lwpid;
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thr_self(&lwpid);
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return (int)lwpid;
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}
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int rte_thread_setname(pthread_t id, const char *name)
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{
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/* this BSD function returns no error */
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pthread_set_name_np(id, name);
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return 0;
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}
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