> -----Original Message-----
> From: Hu, Jiayu
> Sent: Sunday, June 18, 2017 3:21 PM
> To: dev@dpdk.org
> Cc: Ananyev, Konstantin <konstantin.anan...@intel.com>;
> y...@fridaylinux.org; Wiles, Keith <keith.wi...@intel.com>; Tan, Jianfeng
> <jianfeng....@intel.com>; Bie, Tiwei <tiwei....@intel.com>; Yao, Lei A
> <lei.a....@intel.com>; Hu, Jiayu <jiayu...@intel.com>
> Subject: [PATCH v5 3/3] app/testpmd: enable TCP/IPv4 GRO
>
> This patch demonstrates the usage of GRO library in testpmd. By default,
> GRO is turned off. Command, "gro on (port_id)", turns on GRO for the
> given port; command, "gro off (port_id)", turns off GRO for the given
> port. Currently, GRO only supports to process TCP/IPv4 packets and works
> in IO forward mode. Besides, only GRO lightweight mode is enabled.
>
> Signed-off-by: Jiayu Hu <jiayu...@intel.com>
Tested-by: Lei Yao<lei.a....@intel.com>
This patch set has been tested on my bench using iperf. In
some scenario, the performance gain can reach about 50%.
The performance gain will depend on the rx burst size in real
usage.
OS: Ubuntu 16.04
CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
> ---
> app/test-pmd/cmdline.c | 45
> +++++++++++++++++++++++++++++++++++++++++++++
> app/test-pmd/config.c | 29 +++++++++++++++++++++++++++++
> app/test-pmd/iofwd.c | 6 ++++++
> app/test-pmd/testpmd.c | 3 +++
> app/test-pmd/testpmd.h | 11 +++++++++++
> 5 files changed, 94 insertions(+)
>
> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
> index 105c71f..d1ca8df 100644
> --- a/app/test-pmd/cmdline.c
> +++ b/app/test-pmd/cmdline.c
> @@ -76,6 +76,7 @@
> #include <rte_devargs.h>
> #include <rte_eth_ctrl.h>
> #include <rte_flow.h>
> +#include <rte_gro.h>
>
> #include <cmdline_rdline.h>
> #include <cmdline_parse.h>
> @@ -423,6 +424,9 @@ static void cmd_help_long_parsed(void
> *parsed_result,
> "tso show (portid)"
> " Display the status of TCP Segmentation
> Offload.\n\n"
>
> + "gro (on|off) (port_id)"
> + " Enable or disable Generic Receive Offload.\n\n"
> +
> "set fwd (%s)\n"
> " Set packet forwarding mode.\n\n"
>
> @@ -3831,6 +3835,46 @@ cmdline_parse_inst_t cmd_tunnel_tso_show = {
> },
> };
>
> +/* *** SET GRO FOR A PORT *** */
> +struct cmd_gro_result {
> + cmdline_fixed_string_t cmd_keyword;
> + cmdline_fixed_string_t mode;
> + uint8_t port_id;
> +};
> +
> +static void
> +cmd_set_gro_parsed(void *parsed_result,
> + __attribute__((unused)) struct cmdline *cl,
> + __attribute__((unused)) void *data)
> +{
> + struct cmd_gro_result *res;
> +
> + res = parsed_result;
> + setup_gro(res->mode, res->port_id);
> +}
> +
> +cmdline_parse_token_string_t cmd_gro_keyword =
> + TOKEN_STRING_INITIALIZER(struct cmd_gro_result,
> + cmd_keyword, "gro");
> +cmdline_parse_token_string_t cmd_gro_mode =
> + TOKEN_STRING_INITIALIZER(struct cmd_gro_result,
> + mode, "on#off");
> +cmdline_parse_token_num_t cmd_gro_pid =
> + TOKEN_NUM_INITIALIZER(struct cmd_gro_result,
> + port_id, UINT8);
> +
> +cmdline_parse_inst_t cmd_set_gro = {
> + .f = cmd_set_gro_parsed,
> + .data = NULL,
> + .help_str = "gro (on|off) (port_id)",
> + .tokens = {
> + (void *)&cmd_gro_keyword,
> + (void *)&cmd_gro_mode,
> + (void *)&cmd_gro_pid,
> + NULL,
> + },
> +};
> +
> /* *** ENABLE/DISABLE FLUSH ON RX STREAMS *** */
> struct cmd_set_flush_rx {
> cmdline_fixed_string_t set;
> @@ -13710,6 +13754,7 @@ cmdline_parse_ctx_t main_ctx[] = {
> (cmdline_parse_inst_t *)&cmd_tso_show,
> (cmdline_parse_inst_t *)&cmd_tunnel_tso_set,
> (cmdline_parse_inst_t *)&cmd_tunnel_tso_show,
> + (cmdline_parse_inst_t *)&cmd_set_gro,
> (cmdline_parse_inst_t *)&cmd_link_flow_control_set,
> (cmdline_parse_inst_t *)&cmd_link_flow_control_set_rx,
> (cmdline_parse_inst_t *)&cmd_link_flow_control_set_tx,
> diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
> index 3cd4f31..858342d 100644
> --- a/app/test-pmd/config.c
> +++ b/app/test-pmd/config.c
> @@ -71,6 +71,7 @@
> #ifdef RTE_LIBRTE_BNXT_PMD
> #include <rte_pmd_bnxt.h>
> #endif
> +#include <rte_gro.h>
>
> #include "testpmd.h"
>
> @@ -2414,6 +2415,34 @@ set_tx_pkt_segments(unsigned *seg_lengths,
> unsigned nb_segs)
> tx_pkt_nb_segs = (uint8_t) nb_segs;
> }
>
> +void
> +setup_gro(const char *mode, uint8_t port_id)
> +{
> + if (!rte_eth_dev_is_valid_port(port_id)) {
> + printf("invalid port id %u\n", port_id);
> + return;
> + }
> + if (strcmp(mode, "on") == 0) {
> + if (test_done == 0) {
> + printf("before enable GRO,"
> + " please stop forwarding first\n");
> + return;
> + }
> + gro_ports[port_id].enable = 1;
> + gro_ports[port_id].param.max_flow_num = 4;
> + gro_ports[port_id].param.max_item_per_flow = 32;
> + gro_ports[port_id].param.desired_gro_types =
> GRO_TCP_IPV4;
> + gro_ports[port_id].param.max_packet_size = UINT16_MAX;
> + } else if (strcmp(mode, "off") == 0) {
> + if (test_done == 0) {
> + printf("before disable GRO,"
> + " please stop forwarding first\n");
> + return;
> + }
> + gro_ports[port_id].enable = 0;
> + }
> +}
> +
> char*
> list_pkt_forwarding_modes(void)
> {
> diff --git a/app/test-pmd/iofwd.c b/app/test-pmd/iofwd.c
> index 15cb4a2..d9ec528 100644
> --- a/app/test-pmd/iofwd.c
> +++ b/app/test-pmd/iofwd.c
> @@ -65,6 +65,7 @@
> #include <rte_ethdev.h>
> #include <rte_string_fns.h>
> #include <rte_flow.h>
> +#include <rte_gro.h>
>
> #include "testpmd.h"
>
> @@ -99,6 +100,11 @@ pkt_burst_io_forward(struct fwd_stream *fs)
> pkts_burst, nb_pkt_per_burst);
> if (unlikely(nb_rx == 0))
> return;
> + if (unlikely(gro_ports[fs->rx_port].enable)) {
> + nb_rx = rte_gro_reassemble_burst(pkts_burst,
> + nb_rx,
> + gro_ports[fs->rx_port].param);
> + }
> fs->rx_packets += nb_rx;
>
> #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> index b29328a..ed27c7a 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -90,6 +90,7 @@
> #ifdef RTE_LIBRTE_LATENCY_STATS
> #include <rte_latencystats.h>
> #endif
> +#include <rte_gro.h>
>
> #include "testpmd.h"
>
> @@ -378,6 +379,8 @@ lcoreid_t bitrate_lcore_id;
> uint8_t bitrate_enabled;
> #endif
>
> +struct gro_status gro_ports[RTE_MAX_ETHPORTS];
> +
> /* Forward function declarations */
> static void map_port_queue_stats_mapping_registers(uint8_t pi, struct
> rte_port *port);
> static void check_all_ports_link_status(uint32_t port_mask);
> diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
> index 364502d..0471e99 100644
> --- a/app/test-pmd/testpmd.h
> +++ b/app/test-pmd/testpmd.h
> @@ -34,6 +34,8 @@
> #ifndef _TESTPMD_H_
> #define _TESTPMD_H_
>
> +#include <rte_gro.h>
> +
> #define RTE_PORT_ALL (~(portid_t)0x0)
>
> #define RTE_TEST_RX_DESC_MAX 2048
> @@ -109,6 +111,8 @@ struct fwd_stream {
> queueid_t tx_queue; /**< TX queue to send forwarded packets */
> streamid_t peer_addr; /**< index of peer ethernet address of
> packets */
>
> + uint16_t tbl_idx; /**< TCP IPv4 GRO lookup tale index */
> +
> unsigned int retry_enabled;
>
> /* "read-write" results */
> @@ -428,6 +432,12 @@ extern struct ether_addr
> peer_eth_addrs[RTE_MAX_ETHPORTS];
> extern uint32_t burst_tx_delay_time; /**< Burst tx delay time(us) for mac-
> retry. */
> extern uint32_t burst_tx_retry_num; /**< Burst tx retry number for mac-
> retry. */
>
> +struct gro_status {
> + struct rte_gro_param param;
> + uint8_t enable;
> +};
> +extern struct gro_status gro_ports[RTE_MAX_ETHPORTS];
> +
> static inline unsigned int
> lcore_num(void)
> {
> @@ -626,6 +636,7 @@ void get_2tuple_filter(uint8_t port_id, uint16_t
> index);
> void get_5tuple_filter(uint8_t port_id, uint16_t index);
> int rx_queue_id_is_invalid(queueid_t rxq_id);
> int tx_queue_id_is_invalid(queueid_t txq_id);
> +void setup_gro(const char *mode, uint8_t port_id);
>
> /* Functions to manage the set of filtered Multicast MAC addresses */
> void mcast_addr_add(uint8_t port_id, struct ether_addr *mc_addr);
> --
> 2.7.4
