From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 84DB242937; Thu, 13 Apr 2023 22:30:29 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 4BF5041138; Thu, 13 Apr 2023 22:30:28 +0200 (CEST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by mails.dpdk.org (Postfix) with ESMTP id 04905410F9 for ; Thu, 13 Apr 2023 22:30:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1681417826; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=mDRxFD6X7yyvVauAIb8kweGT7NgybMM3BB3p0gkP8Jg=; b=bhoZip8zCsWoEQ13N5AUpgISVINfSNTHSDb69ktSP5FFhMI4sjFoMkSxgftAGEgQCYSOuL Az4NAO/NxE+zlsZJJ9SFimrlY/m916LxA8VSZ1n7941E0p2Hl4XH50CrgkqdiNZQg1eyku AInoiyj2cQzuOnua/2JswHEVZAJlvqU= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-398-iMYPlAT9MpigBmLbyfvPWA-1; Thu, 13 Apr 2023 16:30:22 -0400 X-MC-Unique: iMYPlAT9MpigBmLbyfvPWA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1105E1C0432D; Thu, 13 Apr 2023 20:30:21 +0000 (UTC) Received: from ringo.redhat.com (unknown [10.39.208.42]) by smtp.corp.redhat.com (Postfix) with ESMTP id E1D2D140EBF4; Thu, 13 Apr 2023 20:30:19 +0000 (UTC) From: Robin Jarry To: dev@dpdk.org Cc: Olivier Matz , Jean-Mickael Guerin , Robin Jarry Subject: [PATCH] usertools: add tool to generate balanced rss traffic flows Date: Thu, 13 Apr 2023 22:30:10 +0200 Message-Id: <20230413203010.638406-1-rjarry@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII"; x-default=true 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 From: 6WIND usage: dpdk-rss-flows.py [-h] [-s SPORT_RANGE] [-d DPORT_RANGE] [-r] [-k RSS_KEY] [-t RETA_SIZE] [-j] RX_QUEUES SRC DST Craft IP{v6}/{TCP/UDP} traffic flows that will evenly spread over a given number of RX queues according to the RSS algorithm. positional arguments: RX_QUEUES The number of RX queues to fill. SRC The source IP network/address. DST The destination IP network/address. options: -h, --help show this help message and exit -s SPORT_RANGE, --sport-range SPORT_RANGE The layer 4 (TCP/UDP) source port range. Can be a single fixed value or a range -. -d DPORT_RANGE, --dport-range DPORT_RANGE The layer 4 (TCP/UDP) destination port range. Can be a single fixed value or a range -. -r, --check-reverse-traffic The reversed traffic (source <-> dest) should also be evenly balanced in the queues. -k RSS_KEY, --rss-key RSS_KEY The random key byte-stream used to compute the RSS hash. This option supports either a supported driver name or the hex value of the key (default: intel). -t RETA_SIZE, --reta-size RETA_SIZE Size of the redirection table or "RETA" (default: 128). -j, --json Output in parseable JSON format. Examples: ~$ dpdk-rss-flows.py 8 28.0.0.0/24 40.0.0.0/24 SRC_IP DST_IP QUEUE 28.0.0.1 40.0.0.1 5 28.0.0.1 40.0.0.2 4 28.0.0.1 40.0.0.3 2 28.0.0.1 40.0.0.6 3 28.0.0.1 40.0.0.8 0 28.0.0.1 40.0.0.9 6 28.0.0.1 40.0.0.10 7 28.0.0.1 40.0.0.11 1 ~$ dpdk-rss-flows.py 8 28.0.0.0/24 40.0.0.0/24 -r SRC_IP DST_IP QUEUE QUEUE_REVERSE 28.0.0.1 40.0.0.1 5 3 28.0.0.1 40.0.0.2 4 2 28.0.0.1 40.0.0.8 0 6 28.0.0.1 40.0.0.9 6 7 28.0.0.1 40.0.0.16 2 4 28.0.0.1 40.0.0.19 3 5 28.0.0.1 40.0.0.24 1 0 28.0.0.1 40.0.0.25 7 1 ~$ dpdk-rss-flows.py 8 28.0.0.0/24 40.0.0.0/24 -s 32000-64000 -d 53 SRC_IP SPORT DST_IP DPORT QUEUE 28.0.0.1 32000 40.0.0.1 53 0 28.0.0.1 32001 40.0.0.1 53 1 28.0.0.1 32004 40.0.0.1 53 4 28.0.0.1 32005 40.0.0.1 53 5 28.0.0.1 32008 40.0.0.1 53 2 28.0.0.1 32009 40.0.0.1 53 3 28.0.0.1 32012 40.0.0.1 53 6 28.0.0.1 32013 40.0.0.1 53 7 ~$ dpdk-rss-flows.py 4 2a01:cb00:f8b:9700::/64 2620:52:0:2592::/64 -rj [ { "queue": 0, "queue_reverse": 3, "src_ip": "2a01:cb00:f8b:9700::1", "dst_ip": "2620:52:0:2592::1", "src_port": 0, "dst_port": 0 }, { "queue": 3, "queue_reverse": 0, "src_ip": "2a01:cb00:f8b:9700::1", "dst_ip": "2620:52:0:2592::2", "src_port": 0, "dst_port": 0 }, { "queue": 2, "queue_reverse": 1, "src_ip": "2a01:cb00:f8b:9700::1", "dst_ip": "2620:52:0:2592::3", "src_port": 0, "dst_port": 0 }, { "queue": 1, "queue_reverse": 2, "src_ip": "2a01:cb00:f8b:9700::1", "dst_ip": "2620:52:0:2592::1a", "src_port": 0, "dst_port": 0 } ] Cc: Olivier Matz Cc: Jean-Mickael Guerin Signed-off-by: Robin Jarry --- usertools/dpdk-rss-flows.py | 374 ++++++++++++++++++++++++++++++++++++ usertools/meson.build | 1 + 2 files changed, 375 insertions(+) create mode 100755 usertools/dpdk-rss-flows.py diff --git a/usertools/dpdk-rss-flows.py b/usertools/dpdk-rss-flows.py new file mode 100755 index 000000000000..080d20b11d2f --- /dev/null +++ b/usertools/dpdk-rss-flows.py @@ -0,0 +1,374 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: BSD-3-Clause +# Copyright (c) 2014 6WIND S.A. +# Copyright (c) 2023 Robin Jarry + +""" +Craft IP{v6}/{TCP/UDP} traffic flows that will evenly spread over a given +number of RX queues according to the RSS algorithm. +""" + +import argparse +import binascii +import ctypes +import ipaddress +import json +import struct +import typing + + +NO_PORT = (0,) + +# fmt: off +# rss_intel_key, see drivers/net/ixgbe/ixgbe_rxtx.c +RSS_KEY_INTEL = bytes( + ( + 0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2, + 0x41, 0x67, 0x25, 0x3D, 0x43, 0xA3, 0x8F, 0xB0, + 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4, + 0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C, + 0x6A, 0x42, 0xB7, 0x3B, 0xBE, 0xAC, 0x01, 0xFA, + ) +) +# rss_hash_default_key, see drivers/net/mlx5/mlx5_rxq.c +RSS_KEY_MLX = bytes( + ( + 0x2C, 0xC6, 0x81, 0xD1, 0x5B, 0xDB, 0xF4, 0xF7, + 0xFC, 0xA2, 0x83, 0x19, 0xDB, 0x1A, 0x3E, 0x94, + 0x6B, 0x9E, 0x38, 0xD9, 0x2C, 0x9C, 0x03, 0xD1, + 0xAD, 0x99, 0x44, 0xA7, 0xD9, 0x56, 0x3D, 0x59, + 0x06, 0x3C, 0x25, 0xF3, 0xFC, 0x1F, 0xDC, 0x2A, + ) +) +# fmt: on +DEFAULT_DRIVER_KEYS = { + "intel": RSS_KEY_INTEL, + "mlx": RSS_KEY_MLX, +} + + +def rss_key(value): + if value in DEFAULT_DRIVER_KEYS: + return DEFAULT_DRIVER_KEYS[value] + try: + key = binascii.unhexlify(value) + if len(key) != 40: + raise argparse.ArgumentTypeError("The key must be 40 bytes long") + return key + except (TypeError, ValueError) as e: + raise argparse.ArgumentTypeError(str(e)) from e + + +def port_range(value): + try: + if "-" in value: + start, stop = value.split("-") + res = tuple(range(int(start), int(stop))) + else: + res = (int(value),) + return res or NO_PORT + except ValueError as e: + raise argparse.ArgumentTypeError(str(e)) from e + + +Address = typing.Union[ipaddress.IPv4Address, ipaddress.IPv6Address] +Network = typing.Union[ipaddress.IPv4Network, ipaddress.IPv6Network] +PortList = typing.Iterable[int] + + +class Packet: + def __init__(self, ip_src: Address, ip_dst: Address, l4_sport: int, l4_dport: int): + self.ip_src = ip_src + self.ip_dst = ip_dst + self.l4_sport = l4_sport + self.l4_dport = l4_dport + + def reverse(self): + return Packet( + ip_src=self.ip_dst, + l4_sport=self.l4_dport, + ip_dst=self.ip_src, + l4_dport=self.l4_sport, + ) + + def hash_data(self, use_l4_port: bool = False) -> bytes: + data = self.ip_src.packed + self.ip_dst.packed + if use_l4_port: + data += struct.pack(">H", self.l4_sport) + data += struct.pack(">H", self.l4_dport) + return data + + +class TrafficTemplate: + def __init__( + self, + ip_src: Network, + ip_dst: Network, + l4_sport_range: PortList, + l4_dport_range: PortList, + ): + self.ip_src = ip_src + self.ip_dst = ip_dst + self.l4_sport_range = l4_sport_range + self.l4_dport_range = l4_dport_range + + def __iter__(self) -> typing.Iterator[Packet]: + for ip_src in self.ip_src.hosts(): + for ip_dst in self.ip_dst.hosts(): + if ip_src == ip_dst: + continue + for sport in self.l4_sport_range: + for dport in self.l4_dport_range: + yield Packet(ip_src, ip_dst, sport, dport) + + +class RSSAlgo: + def __init__( + self, + queues_count: int, + key: bytes, + reta_size: int, + use_l4_port: bool, + ): + self.queues_count = queues_count + self.reta = tuple(i % queues_count for i in range(reta_size)) + self.key = key + self.use_l4_port = use_l4_port + + def toeplitz_hash(self, data: bytes) -> int: + hash_value = ctypes.c_uint32(0) + + for i, byte in enumerate(data): + for j in range(8): + bit = (byte >> (7 - j)) & 0x01 + + if bit == 1: + keyword = ctypes.c_uint32(0) + keyword.value |= self.key[i] << 24 + keyword.value |= self.key[i + 1] << 16 + keyword.value |= self.key[i + 2] << 8 + keyword.value |= self.key[i + 3] + + if j > 0: + keyword.value <<= j + keyword.value |= self.key[i + 4] >> (8 - j) + + hash_value.value ^= keyword.value + + return hash_value.value + + def get_queue_index(self, packet: Packet) -> int: + bytes_to_hash = packet.hash_data(self.use_l4_port) + + # get the 32bit hash of the packet + hash_value = self.toeplitz_hash(bytes_to_hash) + + # determine the offset in the redirection table + offset = hash_value & (len(self.reta) - 1) + + return self.reta[offset] + + +def balanced_traffic( + algo: RSSAlgo, + traffic_template: TrafficTemplate, + check_reverse_traffic: bool, +) -> typing.Iterator[typing.Tuple[int, int, Packet]]: + queues = set() + if check_reverse_traffic: + queues_reverse = set() + + for pkt in traffic_template: + + q = algo.get_queue_index(pkt) + + # check if q is already filled + if q in queues: + continue + + qr = algo.get_queue_index(pkt.reverse()) + + if check_reverse_traffic: + # check if q is already filled + if qr in queues_reverse: + continue + # mark this queue as matched + queues_reverse.add(qr) + + # mark this queue as filled + queues.add(q) + + yield q, qr, pkt + + # stop when all queues have been filled + if len(queues) == algo.queues_count: + break + + +def parse_args(): + parser = argparse.ArgumentParser(description=__doc__) + + parser.add_argument( + "rx_queues", + metavar="RX_QUEUES", + type=int, + help=""" + The number of RX queues to fill. + """, + ) + parser.add_argument( + "ip_src", + metavar="SRC", + type=ipaddress.ip_network, + help=""" + The source IP network/address. + """, + ) + parser.add_argument( + "ip_dst", + metavar="DST", + type=ipaddress.ip_network, + help=""" + The destination IP network/address. + """, + ) + parser.add_argument( + "-s", + "--sport-range", + type=port_range, + default=NO_PORT, + help=""" + The layer 4 (TCP/UDP) source port range. + Can be a single fixed value or a range -. + """, + ) + parser.add_argument( + "-d", + "--dport-range", + type=port_range, + default=NO_PORT, + help=""" + The layer 4 (TCP/UDP) destination port range. + Can be a single fixed value or a range -. + """, + ) + parser.add_argument( + "-r", + "--check-reverse-traffic", + default=False, + action="store_true", + help=""" + The reversed traffic (source <-> dest) should also be evenly balanced + in the queues. + """, + ) + parser.add_argument( + "-k", + "--rss-key", + default=RSS_KEY_INTEL, + type=rss_key, + help=""" + The random 40-bytes key used to compute the RSS hash. This option + supports either a well-known name or the hex value of the key + (well-known names: "intel", "mlx", default: "intel"). + """, + ) + parser.add_argument( + "-t", + "--reta-size", + default=128, + type=int, + help=""" + Size of the redirection table or "RETA" (default: 128). + """, + ) + parser.add_argument( + "-j", + "--json", + action="store_true", + help=""" + Output in parseable JSON format. + """, + ) + + args = parser.parse_args() + + if args.ip_src.version != args.ip_dst.version: + parser.error( + f"{args.ip_src} and {args.ip_dst} don't have the same protocol version" + ) + if args.reta_size < args.rx_queues: + parser.error("RETA_SIZE must be greater than or equal to RX_QUEUES") + + return args + + +def main(): + args = parse_args() + use_l4_port = args.sport_range != NO_PORT or args.dport_range != NO_PORT + + algo = RSSAlgo( + queues_count=args.rx_queues, + key=args.rss_key, + reta_size=args.reta_size, + use_l4_port=use_l4_port, + ) + template = TrafficTemplate( + args.ip_src, + args.ip_dst, + args.sport_range, + args.dport_range, + ) + + results = balanced_traffic(algo, template, args.check_reverse_traffic) + + if args.json: + flows = [] + for q, qr, pkt in results: + flows.append( + { + "queue": q, + "queue_reverse": qr, + "src_ip": str(pkt.ip_src), + "dst_ip": str(pkt.ip_dst), + "src_port": pkt.l4_sport, + "dst_port": pkt.l4_dport, + } + ) + print(json.dumps(flows, indent=2)) + return + + if use_l4_port: + header = ["SRC_IP", "SPORT", "DST_IP", "DPORT", "QUEUE"] + else: + header = ["SRC_IP", "DST_IP", "QUEUE"] + if args.check_reverse_traffic: + header.append("QUEUE_REVERSE") + + rows = [tuple(header)] + widths = [len(h) for h in header] + + for q, qr, pkt in results: + if use_l4_port: + row = [pkt.ip_src, pkt.l4_sport, pkt.ip_dst, pkt.l4_dport, q] + else: + row = [pkt.ip_src, pkt.ip_dst, q] + if args.check_reverse_traffic: + row.append(qr) + cells = [] + for i, r in enumerate(row): + r = str(r) + if len(r) > widths[i]: + widths[i] = len(r) + cells.append(r) + rows.append(tuple(cells)) + + fmt = [f"%-{w}s" for w in widths] + fmt[-1] = "%s" # avoid trailing whitespace + fmt = " ".join(fmt) + for row in rows: + print(fmt % row) + + +if __name__ == "__main__": + main() diff --git a/usertools/meson.build b/usertools/meson.build index b6271a207cce..0efa4a86d97c 100644 --- a/usertools/meson.build +++ b/usertools/meson.build @@ -6,5 +6,6 @@ install_data([ 'dpdk-pmdinfo.py', 'dpdk-telemetry.py', 'dpdk-hugepages.py', + 'dpdk-rss-flows.py', ], install_dir: 'bin') -- 2.40.0