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DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jun 2022 12:49:07.2948 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5a20846a-4c8b-4b64-fc96-08da455f72b1 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[12.22.5.238]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT007.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB3869 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Add command line options to support host shaper configure. - Command syntax: mlx5 set port host_shaper fill_thresh_triggered <0|1> rate - Example commands: To enable fill_thresh_triggered on port 1 and disable current host shaper: testpmd> mlx5 set port 1 host_shaper fill_thresh_triggered 1 rate 0 To disable fill_thresh_triggered and current host shaper on port 1: testpmd> mlx5 set port 1 host_shaper fill_thresh_triggered 0 rate 0 The rate unit is 100Mbps. To disable fill_thresh_triggered and configure a shaper of 5Gbps on port 1: testpmd> mlx5 set port 1 host_shaper fill_thresh_triggered 0 rate 50 Add sample code to handle rxq fill_thresh event, it delays a while so that rxq empties, then disables host shaper and rearms fill_thresh event. Signed-off-by: Spike Du --- app/test-pmd/testpmd.c | 6 ++ doc/guides/nics/mlx5.rst | 46 +++++++++ drivers/net/mlx5/meson.build | 4 + drivers/net/mlx5/mlx5_testpmd.c | 201 ++++++++++++++++++++++++++++++++++++++++ drivers/net/mlx5/mlx5_testpmd.h | 26 ++++++ 5 files changed, 283 insertions(+) create mode 100644 drivers/net/mlx5/mlx5_testpmd.c create mode 100644 drivers/net/mlx5/mlx5_testpmd.h diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index 1209230..babbc94 100644 --- a/app/test-pmd/testpmd.c +++ b/app/test-pmd/testpmd.c @@ -69,6 +69,9 @@ #ifdef RTE_NET_BOND #include #endif +#ifdef RTE_NET_MLX5 +#include "mlx5_testpmd.h" +#endif #include "testpmd.h" @@ -3663,6 +3666,9 @@ struct pmd_test_command { break; printf("Received fill_thresh event, port:%d rxq_id:%d\n", port_id, rxq_id); +#ifdef RTE_NET_MLX5 + mlx5_test_fill_thresh_event_handler(port_id, rxq_id); +#endif } break; default: diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst index 39bfebb..cdeeef3 100644 --- a/doc/guides/nics/mlx5.rst +++ b/doc/guides/nics/mlx5.rst @@ -1727,3 +1727,49 @@ which can be installed from OFED mstflint package. Meson detects ``libmtcr_ul`` existence at configure stage. If the library is detected, the application must link with ``-lmtcr_ul``, as done by the pkg-config file libdpdk.pc. + +How to use fill threshold and Host Shaper +------------------------------ + +There are sample command lines to configure fill threshold in testpmd. +Testpmd also contains sample logic to handle fill threshold event. +The typical workflow is: testpmd configure fill threshold for Rx queues, enable +fill_thresh_triggered in host shaper and register a callback, when traffic from host is +too high and Rx queue fullness is above fill threshold, PMD receives an event and +firmware configures a 100Mbps shaper on host port automatically, then PMD call +the callback registered previously, which will delay a while to let Rx queue +empty, then disable host shaper. + +Let's assume we have a simple Blue Field 2 setup: port 0 is uplink, port 1 +is VF representor. Each port has 2 Rx queues. +In order to control traffic from host to ARM, we can enable fill threshold in testpmd by: + +.. code-block:: console + + testpmd> mlx5 set port 1 host_shaper fill_thresh_triggered 1 rate 0 + testpmd> set port 1 rxq 0 fill_thresh 70 + testpmd> set port 1 rxq 1 fill_thresh 70 + +The first command disables current host shaper, and enables fill threshold triggered mode. +The left commands configure fill threshold to 70% of Rx queue size for both Rx queues, +When traffic from host is too high, you can see testpmd console prints log +about fill threshold event receiving, then host shaper is disabled. +The traffic rate from host is controlled and less drop happens in Rx queues. + +When disable fill threshold and fill_thresh_triggered, we can invoke below commands in testpmd: + +.. code-block:: console + + testpmd> mlx5 set port 1 host_shaper fill_thresh_triggered 0 rate 0 + testpmd> set port 1 rxq 0 fill_thresh 0 + testpmd> set port 1 rxq 1 fill_thresh 0 + +It's recommended an application disables fill threshold and fill_thresh_triggered before exit, +if it enables them before. + +We can also configure the shaper with a value, the rate unit is 100Mbps, below +command sets current shaper to 5Gbps and disables fill_thresh_triggered. + +.. code-block:: console + + testpmd> mlx5 set port 1 host_shaper fill_thresh_triggered 0 rate 50 diff --git a/drivers/net/mlx5/meson.build b/drivers/net/mlx5/meson.build index 99210fd..941642b 100644 --- a/drivers/net/mlx5/meson.build +++ b/drivers/net/mlx5/meson.build @@ -68,4 +68,8 @@ if get_option('buildtype').contains('debug') else cflags += [ '-UPEDANTIC' ] endif + +testpmd_sources += files('mlx5_testpmd.c') +testpmd_drivers_deps += 'net_mlx5' + subdir(exec_env) diff --git a/drivers/net/mlx5/mlx5_testpmd.c b/drivers/net/mlx5/mlx5_testpmd.c new file mode 100644 index 0000000..7f7f4d8 --- /dev/null +++ b/drivers/net/mlx5/mlx5_testpmd.c @@ -0,0 +1,201 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2021 6WIND S.A. + * Copyright 2021 Mellanox Technologies, Ltd + */ + +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include "mlx5_testpmd.h" +#include "testpmd.h" + +static uint8_t host_shaper_fill_thresh_triggered[RTE_MAX_ETHPORTS]; +#define SHAPER_DISABLE_DELAY_US 100000 /* 100ms */ + +/** + * Disable the host shaper and re-arm fill threshold event. + * + * @param[in] args + * uint32_t integer combining port_id and rxq_id. + */ +static void +mlx5_test_host_shaper_disable(void *args) +{ + uint32_t port_rxq_id = (uint32_t)(uintptr_t)args; + uint16_t port_id = port_rxq_id & 0xffff; + uint16_t qid = (port_rxq_id >> 16) & 0xffff; + struct rte_eth_rxq_info qinfo; + + printf("%s disable shaper\n", __func__); + if (rte_eth_rx_queue_info_get(port_id, qid, &qinfo)) { + printf("rx_queue_info_get returns error\n"); + return; + } + /* Rearm the fill threshold event. */ + if (rte_eth_rx_fill_thresh_set(port_id, qid, qinfo.fill_thresh)) { + printf("config fill_thresh returns error\n"); + return; + } + /* Only disable the shaper when fill_thresh_triggered is set. */ + if (host_shaper_fill_thresh_triggered[port_id] && + rte_pmd_mlx5_host_shaper_config(port_id, 0, 0)) + printf("%s disable shaper returns error\n", __func__); +} + +void +mlx5_test_fill_thresh_event_handler(uint16_t port_id, uint16_t rxq_id) +{ + uint32_t port_rxq_id = port_id | (rxq_id << 16); + + rte_eal_alarm_set(SHAPER_DISABLE_DELAY_US, + mlx5_test_host_shaper_disable, + (void *)(uintptr_t)port_rxq_id); + printf("%s port_id:%u rxq_id:%u\n", __func__, port_id, rxq_id); +} + +/** + * Configure host shaper's fill_thresh_triggered and current rate. + * + * @param[in] fill_thresh_triggered + * Disable/enable fill_thresh_triggered. + * @param[in] rate + * Configure current host shaper rate. + * @return + * On success, returns 0. + * On failure, returns < 0. + */ +static int +mlx5_test_set_port_host_shaper(uint16_t port_id, uint16_t fill_thresh_triggered, uint8_t rate) +{ + struct rte_eth_link link; + bool port_id_valid = false; + uint16_t pid; + int ret; + + RTE_ETH_FOREACH_DEV(pid) + if (port_id == pid) { + port_id_valid = true; + break; + } + if (!port_id_valid) + return -EINVAL; + ret = rte_eth_link_get_nowait(port_id, &link); + if (ret < 0) + return ret; + host_shaper_fill_thresh_triggered[port_id] = fill_thresh_triggered ? 1 : 0; + if (!fill_thresh_triggered) { + ret = rte_pmd_mlx5_host_shaper_config(port_id, 0, + RTE_BIT32(MLX5_HOST_SHAPER_FLAG_FILL_THRESH_TRIGGERED)); + } else { + ret = rte_pmd_mlx5_host_shaper_config(port_id, 1, + RTE_BIT32(MLX5_HOST_SHAPER_FLAG_FILL_THRESH_TRIGGERED)); + } + if (ret) + return ret; + ret = rte_pmd_mlx5_host_shaper_config(port_id, rate, 0); + if (ret) + return ret; + return 0; +} + +/* *** SET HOST_SHAPER FOR A PORT *** */ +struct cmd_port_host_shaper_result { + cmdline_fixed_string_t mlx5; + cmdline_fixed_string_t set; + cmdline_fixed_string_t port; + uint16_t port_num; + cmdline_fixed_string_t host_shaper; + cmdline_fixed_string_t fill_thresh_triggered; + uint16_t fr; + cmdline_fixed_string_t rate; + uint8_t rate_num; +}; + +static void cmd_port_host_shaper_parsed(void *parsed_result, + __rte_unused struct cmdline *cl, + __rte_unused void *data) +{ + struct cmd_port_host_shaper_result *res = parsed_result; + int ret = 0; + + if ((strcmp(res->mlx5, "mlx5") == 0) && + (strcmp(res->set, "set") == 0) && + (strcmp(res->port, "port") == 0) && + (strcmp(res->host_shaper, "host_shaper") == 0) && + (strcmp(res->fill_thresh_triggered, "fill_thresh_triggered") == 0) && + (strcmp(res->rate, "rate") == 0)) + ret = mlx5_test_set_port_host_shaper(res->port_num, res->fr, + res->rate_num); + if (ret < 0) + printf("cmd_port_host_shaper error: (%s)\n", strerror(-ret)); +} + +cmdline_parse_token_string_t cmd_port_host_shaper_mlx5 = + TOKEN_STRING_INITIALIZER(struct cmd_port_host_shaper_result, + mlx5, "mlx5"); +cmdline_parse_token_string_t cmd_port_host_shaper_set = + TOKEN_STRING_INITIALIZER(struct cmd_port_host_shaper_result, + set, "set"); +cmdline_parse_token_string_t cmd_port_host_shaper_port = + TOKEN_STRING_INITIALIZER(struct cmd_port_host_shaper_result, + port, "port"); +cmdline_parse_token_num_t cmd_port_host_shaper_portnum = + TOKEN_NUM_INITIALIZER(struct cmd_port_host_shaper_result, + port_num, RTE_UINT16); +cmdline_parse_token_string_t cmd_port_host_shaper_host_shaper = + TOKEN_STRING_INITIALIZER(struct cmd_port_host_shaper_result, + host_shaper, "host_shaper"); +cmdline_parse_token_string_t cmd_port_host_shaper_fill_thresh_triggered = + TOKEN_STRING_INITIALIZER(struct cmd_port_host_shaper_result, + fill_thresh_triggered, "fill_thresh_triggered"); +cmdline_parse_token_num_t cmd_port_host_shaper_fr = + TOKEN_NUM_INITIALIZER(struct cmd_port_host_shaper_result, + fr, RTE_UINT16); +cmdline_parse_token_string_t cmd_port_host_shaper_rate = + TOKEN_STRING_INITIALIZER(struct cmd_port_host_shaper_result, + rate, "rate"); +cmdline_parse_token_num_t cmd_port_host_shaper_rate_num = + TOKEN_NUM_INITIALIZER(struct cmd_port_host_shaper_result, + rate_num, RTE_UINT8); +cmdline_parse_inst_t mlx5_test_cmd_port_host_shaper = { + .f = cmd_port_host_shaper_parsed, + .data = (void *)0, + .help_str = "mlx5 set port host_shaper fill_thresh_triggered <0|1> " + "rate : Set HOST_SHAPER fill_thresh_triggered and rate with port_id", + .tokens = { + (void *)&cmd_port_host_shaper_mlx5, + (void *)&cmd_port_host_shaper_set, + (void *)&cmd_port_host_shaper_port, + (void *)&cmd_port_host_shaper_portnum, + (void *)&cmd_port_host_shaper_host_shaper, + (void *)&cmd_port_host_shaper_fill_thresh_triggered, + (void *)&cmd_port_host_shaper_fr, + (void *)&cmd_port_host_shaper_rate, + (void *)&cmd_port_host_shaper_rate_num, + NULL, + } +}; + +struct testpmd_driver_commands mlx5_driver_cmds = { + .commands = { + { + .ctx = &mlx5_test_cmd_port_host_shaper, + .help = "mlx5 set port (port_id) host_shaper fill_thresh_triggered (on|off)" + "rate (rate_num):\n" + " Set HOST_SHAPER fill_thresh_triggered and rate with port_id\n\n", + }, + { + .ctx = NULL, + }, + } +}; +TESTPMD_ADD_DRIVER_COMMANDS(mlx5_driver_cmds); + diff --git a/drivers/net/mlx5/mlx5_testpmd.h b/drivers/net/mlx5/mlx5_testpmd.h new file mode 100644 index 0000000..e89b4c8 --- /dev/null +++ b/drivers/net/mlx5/mlx5_testpmd.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2021 6WIND S.A. + * Copyright 2021 Mellanox Technologies, Ltd + */ + +#ifndef RTE_PMD_MLX5_TEST_H_ +#define RTE_PMD_MLX5_TEST_H_ + +#include +#include +#include + +/** + * RTE_ETH_EVENT_RX_FILL_THRESH handler sample code. + * It's called in testpmd, the work flow here is delay a while until + * RX queueu is empty, then disable host shaper. + * + * @param[in] port_id + * Port identifier. + * @param[in] rxq_id + * Rx queue identifier. + */ +void +mlx5_test_fill_thresh_event_handler(uint16_t port_id, uint16_t rxq_id); + +#endif -- 1.8.3.1