From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f43.google.com (mail-wm1-f43.google.com [209.85.128.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB9263590DC for ; Fri, 9 Jan 2026 11:29:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767958161; cv=none; b=hArc1rnZ8u6NDTBlNZSac9xmYEd5IlgB++oLk351NS6BJYa/oerOVjqSwnESJk/QK7uCgdW5+8PH/yadD39bPU9ajbFHBcE8dTSsM7m+Sm4dx2FWgbF+WoE3Q7xjiSCuxc0b+0yOqtx8+dFmkgkcJkqcQr9//DSLUy1hcaObvAY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767958161; c=relaxed/simple; bh=/jxCrpK8l6glGcqt49LNeHrXzbo3WZk9EY0AmmIwENo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AJDl216RtcsYETGtdfXYEcAiYDU+C0IekYh8rJxkmswW4n9xyKazxQg6TFqLbgL5I62azfqnWllE4rs7vD3rO109I7s81BK3DBTQ2TQHdf67ZOaDm8XMji14EGrkD5/5D7TherGMjp+2Z5BtjPBJeS5c61eECsASvtw355rU80k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=h+0hgalO; arc=none smtp.client-ip=209.85.128.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="h+0hgalO" Received: by mail-wm1-f43.google.com with SMTP id 5b1f17b1804b1-47d6a1f08bbso17294655e9.2 for ; Fri, 09 Jan 2026 03:29:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1767958155; x=1768562955; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=WJRC4dPidxMIa9vqar4Y3LK2OFHt6WzESXNCWKhLD0s=; b=h+0hgalOLvkaiVreIVlWnFsD7FLxMGxgYjcECpRiFlLppOrRDuSOin4WdyW83RlYK4 4SeCVO9+TvbdniM3n7n0RV0JHTKrPFphJJC/dXsDoV5NsL898yYMH8Q0r/E2fJxAgbjy qxA2+cAt2tmQfgW5WfGwgmoSZyd5R6tpVnqkwEEee3MTFFUKoBHdtId+pxPW0w4F2J+q RGjZIyzmTENj1Qa1QkhlDr6Z25G7VOwQvrtv94NFpD80LN0YYXp0HUBO8PFU9YA5kGDG y45NLgx/HYPMjNarPZ3hyLahLByhGvYD1964kMaDn/T56iD0aOJURD1NMaeNn+UzI3tg 6tQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767958155; x=1768562955; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=WJRC4dPidxMIa9vqar4Y3LK2OFHt6WzESXNCWKhLD0s=; b=vWXAG6s7rcUfivKGWpLlH/3jms+5UMiRkC1WWQL0Nt0cTbrr4oxCcPwayOF9rVMTcU RIQBjPUKa2y8pAQb5mjhZxaApOvLMDxhFsIUxoWMk4DSpu7DhtsuWDXT6DX2iraq0NRf V2TpynK8v6i3/9URrJjKvBupdkYuTXwRimuPWvSNHgRit0mw3y1POGXQn/HSHYvHFtqK ukDDZ3zJfZsBiRZ1+FFdcs2L/CwZQJUCovcWL9A9FGkHrPviL+CYUETlctDcg2AgI4v7 I+idu8AFG9OPbA8z0uDULywJcS6z4uL97J0QqFkQYXjyFkTO5gFm4qE13g2rDNDmv4v1 0w6Q== X-Forwarded-Encrypted: i=1; AJvYcCVFYUmRMZfEqChf+d5Z3UyqFfg8U6a3Q6ofRe8KAzWMY/s3+4XMg1/a6HmGDuNtcSi6NYwsmkbqv9UC2C8=@vger.kernel.org X-Gm-Message-State: AOJu0Yy2LrIoIksrVKH9JAjqwCHh8M5GPXq0xmSJy7iINKMjb51UhDOh LVJkAPD/cx1otKwR/B9ymRAEZJFesOUtFDB+IxK4DecmtJTgp0aJcAVa X-Gm-Gg: AY/fxX7j3FQV8AwctklZ2rteW7QZN+itnkDJkruRJcDJmBfVXOQ4uUFJqkcWzdWuddW 2Njc3HFDN25qVsFndxpYyleGoGI/7M0XKk3soXrwvV1IlBfHqOY2f0ZNA5Tp06OPr9LW0/WemfD kp/U98KeTMpF1lTD//KJHaNlnyCDwpa3/zoFeCtst9phKreWUvcVLafWh1iTSlunsT44w3ayGCQ y4CVc0AeHUb39MnGbHQiqyOwvcY7oGlm8Q1GWgJ6CxTwI0rRJEsjicI3xD6sI5JJe80XlRonntT Q1InJ952E0ijlQqVIs+VLKBA20WXnN9QT5lj6TeXu7YASDAFqdRWbBqMkQZA6J+fy+TsKb3Gj9D Ldq8IUjcRAxtKb+Odm1OCHlY4sW5NihOMQDEkp1XuKLt0QSSsQb+onc4casYhojG9y3H7FwTLcv PkKwzsKAltDdUhVCRs8c5GKW+ElhF4RIc5qQNxNC139Cw/glCYMv7eVOkLKD4bF8KjPGC9xA== X-Google-Smtp-Source: AGHT+IFP8GKWdVbTR4kP2eSXOtP3B21YVVOqcaO/WazPjd6IKdKiRPGp9LwPNLHkHaCIs9RrvfXe8w== X-Received: by 2002:a05:600c:8b57:b0:477:54f9:6ac2 with SMTP id 5b1f17b1804b1-47d849bdfa7mr100045195e9.0.1767958154803; Fri, 09 Jan 2026 03:29:14 -0800 (PST) Received: from 127.com ([2620:10d:c092:600::1:69b5]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47d8636c610sm60056985e9.0.2026.01.09.03.29.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Jan 2026 03:29:14 -0800 (PST) From: Pavel Begunkov To: netdev@vger.kernel.org Cc: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Jonathan Corbet , Michael Chan , Pavan Chebbi , Andrew Lunn , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Joshua Washington , Harshitha Ramamurthy , Saeed Mahameed , Tariq Toukan , Mark Bloch , Leon Romanovsky , Alexander Duyck , Ilias Apalodimas , Shuah Khan , Willem de Bruijn , Ankit Garg , Tim Hostetler , Alok Tiwari , Ziwei Xiao , John Fraker , Praveen Kaligineedi , Mohsin Bashir , Joe Damato , Mina Almasry , Dimitri Daskalakis , Stanislav Fomichev , Kuniyuki Iwashima , Samiullah Khawaja , Ahmed Zaki , Alexander Lobakin , Pavel Begunkov , David Wei , Yue Haibing , Haiyue Wang , Jens Axboe , Simon Horman , Vishwanath Seshagiri , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kselftest@vger.kernel.org, dtatulea@nvidia.com, io-uring@vger.kernel.org Subject: [PATCH net-next v8 8/9] selftests: iou-zcrx: test large chunk sizes Date: Fri, 9 Jan 2026 11:28:47 +0000 Message-ID: X-Mailer: git-send-email 2.52.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add a test using large chunks for zcrx memory area. Signed-off-by: Pavel Begunkov --- .../selftests/drivers/net/hw/iou-zcrx.c | 72 +++++++++++++++---- .../selftests/drivers/net/hw/iou-zcrx.py | 37 ++++++++++ 2 files changed, 97 insertions(+), 12 deletions(-) diff --git a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c index 62456df947bc..0a19b573f4f5 100644 --- a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c +++ b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c @@ -12,6 +12,7 @@ #include #include +#include #include #include #include @@ -37,6 +38,23 @@ #include +#define SKIP_CODE 42 + +struct t_io_uring_zcrx_ifq_reg { + __u32 if_idx; + __u32 if_rxq; + __u32 rq_entries; + __u32 flags; + + __u64 area_ptr; /* pointer to struct io_uring_zcrx_area_reg */ + __u64 region_ptr; /* struct io_uring_region_desc * */ + + struct io_uring_zcrx_offsets offsets; + __u32 zcrx_id; + __u32 rx_buf_len; + __u64 __resv[3]; +}; + static long page_size; #define AREA_SIZE (8192 * page_size) #define SEND_SIZE (512 * 4096) @@ -65,6 +83,8 @@ static bool cfg_oneshot; static int cfg_oneshot_recvs; static int cfg_send_size = SEND_SIZE; static struct sockaddr_in6 cfg_addr; +static unsigned cfg_rx_buf_len; +static bool cfg_dry_run; static char *payload; static void *area_ptr; @@ -128,14 +148,28 @@ static void setup_zcrx(struct io_uring *ring) if (!ifindex) error(1, 0, "bad interface name: %s", cfg_ifname); - area_ptr = mmap(NULL, - AREA_SIZE, - PROT_READ | PROT_WRITE, - MAP_ANONYMOUS | MAP_PRIVATE, - 0, - 0); - if (area_ptr == MAP_FAILED) - error(1, 0, "mmap(): zero copy area"); + if (cfg_rx_buf_len && cfg_rx_buf_len != page_size) { + area_ptr = mmap(NULL, + AREA_SIZE, + PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE | + MAP_HUGETLB | MAP_HUGE_2MB, + -1, + 0); + if (area_ptr == MAP_FAILED) { + printf("Can't allocate huge pages\n"); + exit(SKIP_CODE); + } + } else { + area_ptr = mmap(NULL, + AREA_SIZE, + PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE, + 0, + 0); + if (area_ptr == MAP_FAILED) + error(1, 0, "mmap(): zero copy area"); + } ring_size = get_refill_ring_size(rq_entries); ring_ptr = mmap(NULL, @@ -157,17 +191,23 @@ static void setup_zcrx(struct io_uring *ring) .flags = 0, }; - struct io_uring_zcrx_ifq_reg reg = { + struct t_io_uring_zcrx_ifq_reg reg = { .if_idx = ifindex, .if_rxq = cfg_queue_id, .rq_entries = rq_entries, .area_ptr = (__u64)(unsigned long)&area_reg, .region_ptr = (__u64)(unsigned long)®ion_reg, + .rx_buf_len = cfg_rx_buf_len, }; - ret = io_uring_register_ifq(ring, ®); - if (ret) + ret = io_uring_register_ifq(ring, (void *)®); + if (cfg_rx_buf_len && (ret == -EINVAL || ret == -EOPNOTSUPP || + ret == -ERANGE)) { + printf("Large chunks are not supported %i\n", ret); + exit(SKIP_CODE); + } else if (ret) { error(1, 0, "io_uring_register_ifq(): %d", ret); + } rq_ring.khead = (unsigned int *)((char *)ring_ptr + reg.offsets.head); rq_ring.ktail = (unsigned int *)((char *)ring_ptr + reg.offsets.tail); @@ -323,6 +363,8 @@ static void run_server(void) io_uring_queue_init(512, &ring, flags); setup_zcrx(&ring); + if (cfg_dry_run) + return; add_accept(&ring, fd); @@ -383,7 +425,7 @@ static void parse_opts(int argc, char **argv) usage(argv[0]); cfg_payload_len = max_payload_len; - while ((c = getopt(argc, argv, "sch:p:l:i:q:o:z:")) != -1) { + while ((c = getopt(argc, argv, "sch:p:l:i:q:o:z:x:d")) != -1) { switch (c) { case 's': if (cfg_client) @@ -418,6 +460,12 @@ static void parse_opts(int argc, char **argv) case 'z': cfg_send_size = strtoul(optarg, NULL, 0); break; + case 'x': + cfg_rx_buf_len = page_size * strtoul(optarg, NULL, 0); + break; + case 'd': + cfg_dry_run = true; + break; } } diff --git a/tools/testing/selftests/drivers/net/hw/iou-zcrx.py b/tools/testing/selftests/drivers/net/hw/iou-zcrx.py index 712c806508b5..83061b27f2f2 100755 --- a/tools/testing/selftests/drivers/net/hw/iou-zcrx.py +++ b/tools/testing/selftests/drivers/net/hw/iou-zcrx.py @@ -7,6 +7,7 @@ from lib.py import ksft_run, ksft_exit, KsftSkipEx from lib.py import NetDrvEpEnv from lib.py import bkg, cmd, defer, ethtool, rand_port, wait_port_listen +SKIP_CODE = 42 def _get_current_settings(cfg): output = ethtool(f"-g {cfg.ifname}", json=True)[0] @@ -132,6 +133,42 @@ def test_zcrx_rss(cfg) -> None: cmd(tx_cmd, host=cfg.remote) +def test_zcrx_large_chunks(cfg) -> None: + cfg.require_ipver('6') + + combined_chans = _get_combined_channels(cfg) + if combined_chans < 2: + raise KsftSkipEx('at least 2 combined channels required') + (rx_ring, hds_thresh) = _get_current_settings(cfg) + port = rand_port() + + ethtool(f"-G {cfg.ifname} tcp-data-split on") + defer(ethtool, f"-G {cfg.ifname} tcp-data-split auto") + + ethtool(f"-G {cfg.ifname} hds-thresh 0") + defer(ethtool, f"-G {cfg.ifname} hds-thresh {hds_thresh}") + + ethtool(f"-G {cfg.ifname} rx 64") + defer(ethtool, f"-G {cfg.ifname} rx {rx_ring}") + + ethtool(f"-X {cfg.ifname} equal {combined_chans - 1}") + defer(ethtool, f"-X {cfg.ifname} default") + + flow_rule_id = _set_flow_rule(cfg, port, combined_chans - 1) + defer(ethtool, f"-N {cfg.ifname} delete {flow_rule_id}") + + rx_cmd = f"{cfg.bin_local} -s -p {port} -i {cfg.ifname} -q {combined_chans - 1} -x 2" + tx_cmd = f"{cfg.bin_remote} -c -h {cfg.addr_v['6']} -p {port} -l 12840" + + probe = cmd(rx_cmd + " -d", fail=False) + if probe.ret == SKIP_CODE: + raise KsftSkipEx(probe.stdout) + + with bkg(rx_cmd, exit_wait=True): + wait_port_listen(port, proto="tcp") + cmd(tx_cmd, host=cfg.remote) + + def main() -> None: with NetDrvEpEnv(__file__) as cfg: cfg.bin_local = path.abspath(path.dirname(__file__) + "/../../../drivers/net/hw/iou-zcrx") -- 2.52.0