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examples/l2fwd_fork: new app

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Signed-off-by: Intel
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Intel 2013-09-18 12:00:00 +02:00 committed by Thomas Monjalon
parent cfd5c971e5
commit 95e8005a56
5 changed files with 1909 additions and 0 deletions
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50
examples/multi_process/l2fwd_fork/Makefile Normal file
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# BSD LICENSE
#
# Copyright(c) 2010-2013 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.
ifeq ($(RTE_SDK),)
$(error "Please define RTE_SDK environment variable")
endif
# Default target, can be overriden by command line or environment
RTE_TARGET ?= x86_64-default-linuxapp-gcc
include $(RTE_SDK)/mk/rte.vars.mk
# binary name
APP = l2fwd_fork
# all source are stored in SRCS-y
SRCS-y := main.c flib.c
CFLAGS += -O3
CFLAGS += $(WERROR_FLAGS)
include $(RTE_SDK)/mk/rte.extapp.mk

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examples/multi_process/l2fwd_fork/flib.c Normal file
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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2013 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/wait.h>
#include <sys/prctl.h>
#include <netinet/in.h>
#include <setjmp.h>
#include <stdarg.h>
#include <ctype.h>
#include <errno.h>
#include <getopt.h>
#include <dirent.h>
#include <signal.h>
#include <rte_common.h>
#include <rte_log.h>
#include <rte_malloc.h>
#include <rte_memory.h>
#include <rte_memcpy.h>
#include <rte_memzone.h>
#include <rte_tailq.h>
#include <rte_eal.h>
#include <rte_per_lcore.h>
#include <rte_launch.h>
#include <rte_atomic.h>
#include <rte_cycles.h>
#include <rte_prefetch.h>
#include <rte_lcore.h>
#include <rte_per_lcore.h>
#include <rte_branch_prediction.h>
#include <rte_interrupts.h>
#include <rte_pci.h>
#include <rte_random.h>
#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_ring.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_string_fns.h>
#include "flib.h"
#define SIG_PARENT_EXIT SIGUSR1
struct lcore_stat {
pid_t pid; /**< pthread identifier */
lcore_function_t *f; /**< function to call */
void *arg; /**< argument of function */
slave_exit_notify *cb_fn;
} __rte_cache_aligned;
static struct lcore_stat *core_cfg;
static uint16_t *lcore_cfg = NULL;
/* signal handler to be notified after parent leaves */
static void
sighand_parent_exit(int sig)
{
printf("lcore = %u : Find parent leaves, sig=%d\n", rte_lcore_id(),
sig);
printf("Child leaving\n");
exit(0);
return;
}
/**
* Real function entrance ran in slave process
**/
static int
slave_proc_func(void)
{
struct rte_config *config;
unsigned slave_id = rte_lcore_id();
struct lcore_stat *cfg = &core_cfg[slave_id];
if (prctl(PR_SET_PDEATHSIG, SIG_PARENT_EXIT, 0, 0, 0, 0) != 0)
printf("Warning: Slave can't register for being notified in"
"case master process exited\n");
else {
struct sigaction act;
memset(&act, 0 , sizeof(act));
act.sa_handler = sighand_parent_exit;
if (sigaction(SIG_PARENT_EXIT, &act, NULL) != 0)
printf("Fail to register signal handler:%d\n", SIG_PARENT_EXIT);
}
/* Set slave process to SECONDARY to avoid operation like dev_start/stop etc */
config = rte_eal_get_configuration();
if (NULL == config)
printf("Warning:Can't get rte_config\n");
else
config->process_type = RTE_PROC_SECONDARY;
printf("Core %u is ready (pid=%d)\n", slave_id, (int)cfg->pid);
exit(cfg->f(cfg->arg));
}
/**
* function entrance ran in master thread, which will spawn slave process and wait until
* specific slave exited.
**/
static int
lcore_func(void *arg __attribute__((unused)))
{
unsigned slave_id = rte_lcore_id();
struct lcore_stat *cfg = &core_cfg[slave_id];
int pid, stat;
if (rte_get_master_lcore() == slave_id)
return cfg->f(cfg->arg);
/* fork a slave process */
pid = fork();
if (pid == -1) {
printf("Failed to fork\n");
return -1;
} else if (pid == 0) /* child */
return slave_proc_func();
else { /* parent */
cfg->pid = pid;
waitpid(pid, &stat, 0);
cfg->pid = 0;
cfg->f = NULL;
cfg->arg = NULL;
/* Notify slave's exit if applicable */
if(cfg->cb_fn)
cfg->cb_fn(slave_id, stat);
return stat;
}
}
static int
lcore_id_init(void)
{
int i;
/* Setup lcore ID allocation map */
lcore_cfg = rte_zmalloc("LCORE_ID_MAP",
sizeof(uint16_t) * RTE_MAX_LCORE,
CACHE_LINE_SIZE);
if(lcore_cfg == NULL)
rte_panic("Failed to malloc\n");
for (i = 0; i < RTE_MAX_LCORE; i++) {
if (rte_lcore_is_enabled(i))
lcore_cfg[i] = 1;
}
return 0;
}
int
flib_assign_lcore_id(void)
{
unsigned i;
int ret;
/**
* thread assigned a lcore id previously, or a slave thread. But still have
* a bug here: If the core mask includes core 0, and that core call this
* function, it still can get a new lcore id.
**/
if (rte_lcore_id() != 0)
return -1;
do {
/* Find a lcore id not used yet, avoid to use lcore ID 0 */
for (i = 1; i < RTE_MAX_LCORE; i++) {
if (lcore_cfg[i] == 0)
break;
}
if (i == RTE_MAX_LCORE)
return -1;
/* Assign new lcore id to this thread */
ret = rte_atomic16_cmpset(&lcore_cfg[i], 0, 1);
} while (unlikely(ret == 0));
RTE_PER_LCORE(_lcore_id) = i;
return i;
}
void
flib_free_lcore_id(unsigned lcore_id)
{
/* id is not valid or belongs to pinned core id */
if (lcore_id >= RTE_MAX_LCORE || lcore_id == 0 ||
rte_lcore_is_enabled(lcore_id))
return;
lcore_cfg[lcore_id] = 0;
}
int
flib_register_slave_exit_notify(unsigned slave_id,
slave_exit_notify *cb)
{
if (cb == NULL)
return -EFAULT;
if (!rte_lcore_is_enabled(slave_id))
return -ENOENT;
core_cfg[slave_id].cb_fn = cb;
return 0;
}
enum slave_stat
flib_query_slave_status(unsigned slave_id)
{
if (!rte_lcore_is_enabled(slave_id))
return ST_FREEZE;
/* pid only be set when slave process spawned */
if (core_cfg[slave_id].pid != 0)
return ST_RUN;
else
return ST_IDLE;
}
int
flib_remote_launch(lcore_function_t *f,
void *arg, unsigned slave_id)
{
if (f == NULL)
return -1;
if (!rte_lcore_is_enabled(slave_id))
return -1;
/* Wait until specific lcore state change to WAIT */
rte_eal_wait_lcore(slave_id);
core_cfg[slave_id].f = f;
core_cfg[slave_id].arg = arg;
return rte_eal_remote_launch(lcore_func, NULL, slave_id);
}
int
flib_mp_remote_launch(lcore_function_t *f, void *arg,
enum rte_rmt_call_master_t call_master)
{
int i;
RTE_LCORE_FOREACH_SLAVE(i) {
core_cfg[i].arg = arg;
core_cfg[i].f = f;
}
return rte_eal_mp_remote_launch(lcore_func, NULL, call_master);
}
int
flib_init(void)
{
if ((core_cfg = rte_zmalloc("core_cfg",
sizeof(struct lcore_stat) * RTE_MAX_LCORE,
CACHE_LINE_SIZE)) == NULL ) {
printf("rte_zmalloc failed\n");
return -1;
}
if (lcore_id_init() != 0) {
printf("lcore_id_init failed\n");
return -1;
}
return 0;
}

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examples/multi_process/l2fwd_fork/flib.h Normal file
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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2013 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.
*/
#ifndef __FLIB_H
#define __FLIB_H
/* callback function pointer when specific slave leaves */
typedef void (slave_exit_notify)(unsigned slaveid, int stat);
enum slave_stat{
ST_FREEZE = 1,
ST_IDLE,
ST_RUN,
ST_ZOMBIE, /* Not implemented yet */
};
/**
* Initialize the fork lib.
*
* @return
* - 0 : fork lib initialized successfully
* - -1 : fork lib initialized failed
*/
int flib_init(void);
/**
* Check that every SLAVE lcores are in WAIT state, then call
* flib_remote_launch() for all of them. If call_master is true
* (set to CALL_MASTER), also call the function on the master lcore.
*
* @param f:
* function pointer need to run
* @param arg:
* argument for f to carry
* @param call_master
* - SKIP_MASTER : only launch function on slave lcores
* - CALL_MASTER : launch function on master and slave lcores
* @return
* - 0 : function execute successfully
* - -1 : function execute failed
*/
int flib_mp_remote_launch(lcore_function_t *f,
void *arg, enum rte_rmt_call_master_t call_master);
/**
* Send a message to a slave lcore identified by slave_id to call a
* function f with argument arg.
*
* @param f:
* function pointer need to run
* @param arg:
* argument for f to carry
* @param slave_id
* slave lcore id to run on
* @return
* - 0 : function execute successfully
* - -1 : function execute failed
*/
int flib_remote_launch(lcore_function_t *f,
void *arg, unsigned slave_id);
/**
* Query the running stat for specific slave, wont' work in with master id
*
* @param slave_id:
* lcore id which should not be master id
* @return
* - ST_FREEZE : lcore is not in enabled core mask
* - ST_IDLE : lcore is idle
* - ST_RUN : lcore is running something
*/
enum slave_stat
flib_query_slave_status(unsigned slave_id);
/**
* Register a callback function to be notified in case specific slave exit.
*
* @param slave_id:
* lcore id which should not be master id
* @param cb:
* callback pointer to register
* @return
* - 0 : function execute successfully
* - -EFAULT : argument error
* - -ENOENT : slave_id not correct
*/
int flib_register_slave_exit_notify(unsigned slave_id,
slave_exit_notify *cb);
/**
* Assign a lcore ID to non-slave thread. Non-slave thread refers to thread that
* not created by function rte_eal_remote_launch or rte_eal_mp_remote_launch.
* These threads can either bind lcore or float among differnt lcores.
* This lcore ID will be unique in multi-thread or multi-process DPDK running
* environment, then it can benefit from using the cache mechanism provided in
* mempool library.
* After calling successfully, use rte_lcore_id() to get the assigned lcore ID, but
* other lcore funtions can't guarantee to work correctly.
*
* @return
* - -1 : can't assign a lcore id with 3 possibilities.
* - it's not non-slave thread.
* - it had assign a lcore id previously
* - the lcore id is running out.
* - > 0 : the assigned lcore id.
*/
int flib_assign_lcore_id(void);
/**
* Free the lcore_id that assigned in flib_assign_lcore_id().
* call it in case non-slave thread is leaving or left.
*
* @param lcore_id
* The identifier of the lcore, which MUST be between 1 and
* RTE_MAX_LCORE-1.
*/
void flib_free_lcore_id(unsigned lcore_id);
#endif /* __FLIB_H */

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examples/multi_process/l2fwd_fork/main.c Normal file
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examples/multi_process/l2fwd_fork/main.h Normal file
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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2013 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.
*/
#ifndef _MAIN_H_
#define _MAIN_H_
#ifdef RTE_EXEC_ENV_BAREMETAL
#define MAIN _main
#else
#define MAIN main
#endif
int MAIN(int argc, char **argv);
#endif /* _MAIN_H_ */