[v3] app/testpmd: support multi-process

  From: Lijun Ou <oulijun@huawei.com>

This patch adds multi-process support for testpmd.
The test cmd example as follows:
the primary cmd:
./dpdk-testpmd -a xxx --proc-type=auto -l 0-1 -- -i \
--rxq=4 --txq=4 --num-procs=2 --proc-id=0

the secondary cmd:
./dpdk-testpmd -a xxx --proc-type=auto -l 2-3 -- -i \
--rxq=4 --txq=4 --num-procs=2 --proc-id=1

Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
---
 app/test-pmd/cmdline.c                |  12 ++-
 app/test-pmd/config.c                 |   9 ++-
 app/test-pmd/parameters.c             |  11 +++
 app/test-pmd/testpmd.c                | 138 ++++++++++++++++++++++------------
 app/test-pmd/testpmd.h                |   7 ++
 doc/guides/testpmd_app_ug/run_app.rst |  69 +++++++++++++++++
 6 files changed, 196 insertions(+), 50 deletions(-)
  

Hi, ferruh and all,
	have you any comments about this patch?
	thanks.

在 2021/3/11 17:07, Min Hu (Connor) 写道:
> From: Lijun Ou <oulijun@huawei.com>
> 
> This patch adds multi-process support for testpmd.
> The test cmd example as follows:
> the primary cmd:
> ./dpdk-testpmd -a xxx --proc-type=auto -l 0-1 -- -i \
> --rxq=4 --txq=4 --num-procs=2 --proc-id=0
> 
> the secondary cmd:
> ./dpdk-testpmd -a xxx --proc-type=auto -l 2-3 -- -i \
> --rxq=4 --txq=4 --num-procs=2 --proc-id=1
> 
> Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
> Signed-off-by: Lijun Ou <oulijun@huawei.com>
> ---
>   app/test-pmd/cmdline.c                |  12 ++-
>   app/test-pmd/config.c                 |   9 ++-
>   app/test-pmd/parameters.c             |  11 +++
>   app/test-pmd/testpmd.c                | 138 ++++++++++++++++++++++------------
>   app/test-pmd/testpmd.h                |   7 ++
>   doc/guides/testpmd_app_ug/run_app.rst |  69 +++++++++++++++++
>   6 files changed, 196 insertions(+), 50 deletions(-)
> 
> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
> index 14110eb..287d7a0 100644
> --- a/app/test-pmd/cmdline.c
> +++ b/app/test-pmd/cmdline.c
> @@ -71,8 +71,6 @@
>   #include "cmdline_tm.h"
>   #include "bpf_cmd.h"
>   
> -static struct cmdline *testpmd_cl;
> -
>   static void cmd_reconfig_device_queue(portid_t id, uint8_t dev, uint8_t queue);
>   
>   /* *** Help command with introduction. *** */
> @@ -5351,6 +5349,12 @@ cmd_set_flush_rx_parsed(void *parsed_result,
>   		__rte_unused void *data)
>   {
>   	struct cmd_set_flush_rx *res = parsed_result;
> +
> +	if (num_procs > 1 && (strcmp(res->mode, "on") == 0)) {
> +		printf("multi-process doesn't support to flush rx queues.\n");
> +		return;
> +	}
> +
>   	no_flush_rx = (uint8_t)((strcmp(res->mode, "on") == 0) ? 0 : 1);
>   }
>   
> @@ -17227,6 +17231,10 @@ prompt(void)
>   		printf("Cannot set exit function for cmdline\n");
>   
>   	cmdline_interact(testpmd_cl);
> +	if (unlikely(f_quit == 1)) {
> +		dup2(testpmd_fd_copy, testpmd_cl->s_in);
> +		close(testpmd_fd_copy);
> +	}
>   	if (ret != 0)
>   		cmdline_stdin_exit(testpmd_cl);
>   }
> diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
> index 576d5ac..9edf84a 100644
> --- a/app/test-pmd/config.c
> +++ b/app/test-pmd/config.c
> @@ -2827,6 +2827,8 @@ rss_fwd_config_setup(void)
>   	queueid_t  rxq;
>   	queueid_t  nb_q;
>   	streamid_t  sm_id;
> +	int start;
> +	int end;
>   
>   	nb_q = nb_rxq;
>   	if (nb_q > nb_txq)
> @@ -2844,7 +2846,10 @@ rss_fwd_config_setup(void)
>   	init_fwd_streams();
>   
>   	setup_fwd_config_of_each_lcore(&cur_fwd_config);
> -	rxp = 0; rxq = 0;
> +	start = proc_id * nb_q / num_procs;
> +	end = start + nb_q / num_procs;
> +	rxp = 0;
> +	rxq = start;
>   	for (sm_id = 0; sm_id < cur_fwd_config.nb_fwd_streams; sm_id++) {
>   		struct fwd_stream *fs;
>   
> @@ -2861,6 +2866,8 @@ rss_fwd_config_setup(void)
>   			continue;
>   		rxp = 0;
>   		rxq++;
> +		if (rxq >= end)
> +			rxq = start;
>   	}
>   }
>   
> diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
> index c8acd5d..1a5bf25 100644
> --- a/app/test-pmd/parameters.c
> +++ b/app/test-pmd/parameters.c
> @@ -45,6 +45,8 @@
>   #include <rte_flow.h>
>   
>   #include "testpmd.h"
> +#define PARAM_PROC_ID "proc-id"
> +#define PARAM_NUM_PROCS "num-procs"
>   
>   static void
>   usage(char* progname)
> @@ -605,6 +607,8 @@ launch_args_parse(int argc, char** argv)
>   		{ "rx-mq-mode",                 1, 0, 0 },
>   		{ "record-core-cycles",         0, 0, 0 },
>   		{ "record-burst-stats",         0, 0, 0 },
> +		{ PARAM_NUM_PROCS,              1, 0, 0 },
> +		{ PARAM_PROC_ID,                1, 0, 0 },
>   		{ 0, 0, 0, 0 },
>   	};
>   
> @@ -1366,6 +1370,13 @@ launch_args_parse(int argc, char** argv)
>   				record_core_cycles = 1;
>   			if (!strcmp(lgopts[opt_idx].name, "record-burst-stats"))
>   				record_burst_stats = 1;
> +
> +			if (strncmp(lgopts[opt_idx].name,
> +				    PARAM_NUM_PROCS, 8) == 0)
> +				num_procs = atoi(optarg);
> +			if (strncmp(lgopts[opt_idx].name,
> +				    PARAM_PROC_ID, 7) == 0)
> +				proc_id = atoi(optarg);
>   			break;
>   		case 'h':
>   			usage(argv[0]);
> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> index 1a57324..bbd45d9 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -63,6 +63,8 @@
>   
>   #include "testpmd.h"
>   
> +int testpmd_fd_copy = 500; /* the copy of STDIN_FILENO */
> +
>   #ifndef MAP_HUGETLB
>   /* FreeBSD may not have MAP_HUGETLB (in fact, it probably doesn't) */
>   #define HUGE_FLAG (0x40000)
> @@ -125,6 +127,9 @@ uint8_t port_numa[RTE_MAX_ETHPORTS];
>    */
>   uint8_t rxring_numa[RTE_MAX_ETHPORTS];
>   
> +int proc_id;
> +unsigned int num_procs = 1;
> +
>   /*
>    * Store specified sockets on which TX ring to be used by ports
>    * is allocated.
> @@ -982,16 +987,26 @@ mbuf_pool_create(uint16_t mbuf_seg_size, unsigned nb_mbuf,
>   			/* wrapper to rte_mempool_create() */
>   			TESTPMD_LOG(INFO, "preferred mempool ops selected: %s\n",
>   					rte_mbuf_best_mempool_ops());
> -			rte_mp = rte_pktmbuf_pool_create(pool_name, nb_mbuf,
> -				mb_mempool_cache, 0, mbuf_seg_size, socket_id);
> +			if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> +				rte_mp = rte_pktmbuf_pool_create(pool_name,
> +					 nb_mbuf, mb_mempool_cache, 0,
> +					 mbuf_seg_size, socket_id);
> +			else
> +				rte_mp = rte_mempool_lookup(pool_name);
> +
>   			break;
>   		}
>   	case MP_ALLOC_ANON:
>   		{
> -			rte_mp = rte_mempool_create_empty(pool_name, nb_mbuf,
> -				mb_size, (unsigned int) mb_mempool_cache,
> -				sizeof(struct rte_pktmbuf_pool_private),
> -				socket_id, mempool_flags);
> +			if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> +				rte_mp = rte_mempool_create_empty(pool_name,
> +					nb_mbuf, mb_size,
> +					(unsigned int)mb_mempool_cache,
> +					sizeof(struct rte_pktmbuf_pool_private),
> +					socket_id, mempool_flags);
> +			else
> +				rte_mp = rte_mempool_lookup(pool_name);
> +
>   			if (rte_mp == NULL)
>   				goto err;
>   
> @@ -1021,9 +1036,13 @@ mbuf_pool_create(uint16_t mbuf_seg_size, unsigned nb_mbuf,
>   
>   			TESTPMD_LOG(INFO, "preferred mempool ops selected: %s\n",
>   					rte_mbuf_best_mempool_ops());
> -			rte_mp = rte_pktmbuf_pool_create(pool_name, nb_mbuf,
> -					mb_mempool_cache, 0, mbuf_seg_size,
> -					heap_socket);
> +			if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> +				rte_mp = rte_pktmbuf_pool_create(pool_name,
> +					 nb_mbuf, mb_mempool_cache, 0,
> +					 mbuf_seg_size, heap_socket);
> +			else
> +				rte_mp = rte_mempool_lookup(pool_name);
> +
>   			break;
>   		}
>   	case MP_ALLOC_XBUF:
> @@ -1994,6 +2013,12 @@ flush_fwd_rx_queues(void)
>   	uint64_t prev_tsc = 0, diff_tsc, cur_tsc, timer_tsc = 0;
>   	uint64_t timer_period;
>   
> +	if (num_procs > 1) {
> +		printf("multi-process not support for flushing fwd rx "
> +		       "queues, skip the below lines and return.\n");
> +		return;
> +	}
> +
>   	/* convert to number of cycles */
>   	timer_period = rte_get_timer_hz(); /* 1 second timeout */
>   
> @@ -2503,21 +2528,28 @@ start_port(portid_t pid)
>   				return -1;
>   			}
>   			/* configure port */
> -			diag = rte_eth_dev_configure(pi, nb_rxq + nb_hairpinq,
> +			if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
> +				diag = rte_eth_dev_configure(pi,
> +						     nb_rxq + nb_hairpinq,
>   						     nb_txq + nb_hairpinq,
>   						     &(port->dev_conf));
> -			if (diag != 0) {
> -				if (rte_atomic16_cmpset(&(port->port_status),
> -				RTE_PORT_HANDLING, RTE_PORT_STOPPED) == 0)
> -					printf("Port %d can not be set back "
> -							"to stopped\n", pi);
> -				printf("Fail to configure port %d\n", pi);
> -				/* try to reconfigure port next time */
> -				port->need_reconfig = 1;
> -				return -1;
> +				if (diag != 0) {
> +					if (rte_atomic16_cmpset(
> +							&(port->port_status),
> +							RTE_PORT_HANDLING,
> +							RTE_PORT_STOPPED) == 0)
> +						printf("Port %d can not be set "
> +						       "back to stopped\n", pi);
> +					printf("Fail to configure port %d\n",
> +						pi);
> +					/* try to reconfigure port next time */
> +					port->need_reconfig = 1;
> +					return -1;
> +				}
>   			}
>   		}
> -		if (port->need_reconfig_queues > 0) {
> +		if (port->need_reconfig_queues > 0 &&
> +		    rte_eal_process_type() == RTE_PROC_PRIMARY) {
>   			port->need_reconfig_queues = 0;
>   			/* setup tx queues */
>   			for (qi = 0; qi < nb_txq; qi++) {
> @@ -2618,15 +2650,18 @@ start_port(portid_t pid)
>   		cnt_pi++;
>   
>   		/* start port */
> -		if (rte_eth_dev_start(pi) < 0) {
> -			printf("Fail to start port %d\n", pi);
> +		if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
> +			diag = rte_eth_dev_start(pi);
> +			if (diag < 0) {
> +				printf("Fail to start port %d\n", pi);
>   
> -			/* Fail to setup rx queue, return */
> -			if (rte_atomic16_cmpset(&(port->port_status),
> -				RTE_PORT_HANDLING, RTE_PORT_STOPPED) == 0)
> -				printf("Port %d can not be set back to "
> +				/* Fail to setup rx queue, return */
> +				if (rte_atomic16_cmpset(&(port->port_status),
> +				    RTE_PORT_HANDLING, RTE_PORT_STOPPED) == 0)
> +					printf("Port %d can not be set back to "
>   							"stopped\n", pi);
> -			continue;
> +				continue;
> +			}
>   		}
>   
>   		if (rte_atomic16_cmpset(&(port->port_status),
> @@ -2755,7 +2790,8 @@ stop_port(portid_t pid)
>   		if (port->flow_list)
>   			port_flow_flush(pi);
>   
> -		if (rte_eth_dev_stop(pi) != 0)
> +		if (rte_eal_process_type() == RTE_PROC_PRIMARY &&
> +		    rte_eth_dev_stop(pi) != 0)
>   			RTE_LOG(ERR, EAL, "rte_eth_dev_stop failed for port %u\n",
>   				pi);
>   
> @@ -2824,8 +2860,10 @@ close_port(portid_t pid)
>   			continue;
>   		}
>   
> -		port_flow_flush(pi);
> -		rte_eth_dev_close(pi);
> +		if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> +			port_flow_flush(pi);
> +		if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> +			rte_eth_dev_close(pi);
>   	}
>   
>   	remove_invalid_ports();
> @@ -3089,7 +3127,7 @@ pmd_test_exit(void)
>   		}
>   	}
>   	for (i = 0 ; i < RTE_DIM(mempools) ; i++) {
> -		if (mempools[i])
> +		if (rte_eal_process_type() == RTE_PROC_PRIMARY && mempools[i])
>   			rte_mempool_free(mempools[i]);
>   	}
>   
> @@ -3611,6 +3649,10 @@ init_port_dcb_config(portid_t pid,
>   	int retval;
>   	uint16_t i;
>   
> +	if (num_procs > 1) {
> +		printf("The multi-process feature doesn't support dcb.\n");
> +		return -ENOTSUP;
> +	}
>   	rte_port = &ports[pid];
>   
>   	memset(&port_conf, 0, sizeof(struct rte_eth_conf));
> @@ -3709,13 +3751,6 @@ init_port(void)
>   }
>   
>   static void
> -force_quit(void)
> -{
> -	pmd_test_exit();
> -	prompt_exit();
> -}
> -
> -static void
>   print_stats(void)
>   {
>   	uint8_t i;
> @@ -3746,12 +3781,16 @@ signal_handler(int signum)
>   		if (latencystats_enabled != 0)
>   			rte_latencystats_uninit();
>   #endif
> -		force_quit();
>   		/* Set flag to indicate the force termination. */
>   		f_quit = 1;
> -		/* exit with the expected status */
> -		signal(signum, SIG_DFL);
> -		kill(getpid(), signum);
> +		if (interactive == 1) {
> +			dup2(testpmd_cl->s_in, testpmd_fd_copy);
> +			close(testpmd_cl->s_in);
> +		} else {
> +			dup2(0, testpmd_fd_copy);
> +			close(0);
> +		}
> +
>   	}
>   }
>   
> @@ -3776,10 +3815,6 @@ main(int argc, char** argv)
>   		rte_exit(EXIT_FAILURE, "Cannot init EAL: %s\n",
>   			 rte_strerror(rte_errno));
>   
> -	if (rte_eal_process_type() == RTE_PROC_SECONDARY)
> -		rte_exit(EXIT_FAILURE,
> -			 "Secondary process type not supported.\n");
> -
>   	ret = register_eth_event_callback();
>   	if (ret != 0)
>   		rte_exit(EXIT_FAILURE, "Cannot register for ethdev events");
> @@ -3875,8 +3910,10 @@ main(int argc, char** argv)
>   		}
>   	}
>   
> -	if (!no_device_start && start_port(RTE_PORT_ALL) != 0)
> +	if (!no_device_start && start_port(RTE_PORT_ALL) != 0) {
> +		pmd_test_exit();
>   		rte_exit(EXIT_FAILURE, "Start ports failed\n");
> +	}
>   
>   	/* set all ports to promiscuous mode by default */
>   	RTE_ETH_FOREACH_DEV(port_id) {
> @@ -3922,6 +3959,8 @@ main(int argc, char** argv)
>   		}
>   		prompt();
>   		pmd_test_exit();
> +		if (unlikely(f_quit == 1))
> +			prompt_exit();
>   	} else
>   #endif
>   	{
> @@ -3957,6 +3996,11 @@ main(int argc, char** argv)
>   		printf("Press enter to exit\n");
>   		rc = read(0, &c, 1);
>   		pmd_test_exit();
> +		if (unlikely(f_quit == 1)) {
> +			dup2(testpmd_fd_copy, 0);
> +			close(testpmd_fd_copy);
> +			prompt_exit();
> +		}
>   		if (rc < 0)
>   			return 1;
>   	}
> diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
> index ce83f31..6d13417 100644
> --- a/app/test-pmd/testpmd.h
> +++ b/app/test-pmd/testpmd.h
> @@ -13,6 +13,7 @@
>   #include <rte_gso.h>
>   #include <cmdline.h>
>   #include <sys/queue.h>
> +#include  "cmdline.h"
>   
>   #define RTE_PORT_ALL            (~(portid_t)0x0)
>   
> @@ -24,6 +25,10 @@
>   #define RTE_PORT_CLOSED         (uint16_t)2
>   #define RTE_PORT_HANDLING       (uint16_t)3
>   
> +uint8_t f_quit;
> +int testpmd_fd_copy;
> +struct cmdline *testpmd_cl;
> +
>   /*
>    * It is used to allocate the memory for hash key.
>    * The hash key size is NIC dependent.
> @@ -422,6 +427,8 @@ extern uint64_t noisy_lkup_mem_sz;
>   extern uint64_t noisy_lkup_num_writes;
>   extern uint64_t noisy_lkup_num_reads;
>   extern uint64_t noisy_lkup_num_reads_writes;
> +extern int proc_id;
> +extern unsigned int num_procs;
>   
>   extern uint8_t dcb_config;
>   extern uint8_t dcb_test;
> diff --git a/doc/guides/testpmd_app_ug/run_app.rst b/doc/guides/testpmd_app_ug/run_app.rst
> index 6745072..8e27fcd 100644
> --- a/doc/guides/testpmd_app_ug/run_app.rst
> +++ b/doc/guides/testpmd_app_ug/run_app.rst
> @@ -536,3 +536,72 @@ The command line options are:
>       bit 1 - two hairpin ports paired
>       bit 0 - two hairpin ports loop
>       The default value is 0. Hairpin will use single port mode and implicit Tx flow mode.
> +
> +
> +Testpmd Support Multi Process Command-line Options
> +--------------------------------------------------
> +
> +The following are the command-line options for the testpmd applications(support multi process).
> +They must be separated from the EAL options, shown in the previous section, with a ``--`` separator:
> +
> +.. code-block:: console
> +
> +	primary process:
> +    sudo ./dpdk-testpmd -a xxx --proc-type=auto -l 0-1 -- -i --rxq=4 --txq=4 --num-procs=2 --proc-id=0
> +
> +	secondary process:
> +	sudo ./dpdk-testpmd -a xxx --proc-type=auto -l 2-3 -- -i --rxq=4 --txq=4 --num-procs=2 --proc-id=1
> +
> +The command line options are:
> +
> +*   ``-a, --allow``
> +
> +	Add a device to the allow list. ``xxx`` means device used which should be the same in primary process
> +	and secondary process.
> +
> +*   ``--proc-type``
> +	Specify a given process instance as the primary or secondary DPDK instance. ``auto`` set here is ok.
> +
> +*   ``-l CORELIST``
> +	List of cores to run on. the corelist should be different in primary process and secondary process.
> +
> +*   ``--rxq=N``
> +
> +    Set the number of RX queues per port to N, where 1 <= N <= 65535.
> +    The default value is 1. N is the sum of queues used by primary and secondary process.
> +
> +*   ``--txq=N``
> +
> +    Set the number of TX queues per port to N, where 1 <= N <= 65535.
> +    The default value is 1. N is the sum of queues used by primary and secondary process.
> +
> +*   ``--num-procs=N``
> +
> +	The number of processes which will be used.
> +
> +*   ``--proc-id=id``
> +
> +	The id of the current process (id < num-procs). id should be different in primary process and secondary process.
> +
> +Calculation rule for queue:
> +All queues are allocated to different processes based on proc_num and proc_id.
> +Calculation rule for the Testpmd to allocate queues to each process:
> +start(queue start id) = proc_id * nb_q / num_procs；
> +end(queue end id) = start + nb_q / num_procs；
> +
> +For example, if supports 4 txq and rxq
> +the 0~1 for primary process
> +the 2~3 for secondary process
> +
> +Most dev ops is supported in primary and secondary process. While secondary process is not permitted
> +to allocate or release shared memory, so some ops are not supported as follows:
> +``dev_start``
> +``dev_stop``
> +``rx_queue_setup``
> +``tx_queue_setup``
> +``rx_queue_release``
> +``tx_queue_release``
> +
> +RTE_FLOW supported, it applies only on its own process on SW side, but all on HW size.
> +stats supported, stats will not change when one quit and start, As they share the same buffer to store the stats.
> +RSS supported, Primary process and secondary process has separate queues to use, RSS will work in their own queues whether primary and secondary process.
>