From patchwork Mon Nov 30 18:52:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= X-Patchwork-Id: 335682 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B093C8302C for ; Mon, 30 Nov 2020 18:54:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 41FD220725 for ; Mon, 30 Nov 2020 18:54:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="oELndJ2H" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388285AbgK3SyR (ORCPT ); Mon, 30 Nov 2020 13:54:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60824 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388189AbgK3SyP (ORCPT ); Mon, 30 Nov 2020 13:54:15 -0500 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8110DC0613D4; Mon, 30 Nov 2020 10:53:35 -0800 (PST) Received: by mail-pf1-x441.google.com with SMTP id s21so10982072pfu.13; Mon, 30 Nov 2020 10:53:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=7nxznByoRK661Y5sKA3lOE1hFkbu17g9h/tzfUN4O8U=; b=oELndJ2HGY7KT3MSqF6sOrP2oktK0nbVDHPOLqVFWQ89PU3eoWVh8MHs7GUQ9B+Na+ E4ATTNBUEs3x+xUQdZWaVzJRsclaTRnivuKsTfxBI4cGfvVU4QRN7Py+9zOCLhXcikwf /Zn5atxbwsvdzUMSIwed+Egnn2cFXaCHTPLi2X6EiVIyuMm/bkqSXXEboZtLRk6QWdM2 VVpF5jcd8T2KChaoTBsDfm/hdph/HTviSX1O1KIRlphVBH3dc5xo8kQGRq8khcWPzsJE wQndJBNr7k9ZlF4I51FW+VZhbDEotv78g/pvh86BWdQi2dL7yVASLuGJSUoQhx3McbQA cmMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7nxznByoRK661Y5sKA3lOE1hFkbu17g9h/tzfUN4O8U=; b=MYS8AQgHQrSpRqwKABCJsPf2yrF+7Q/8F8M4SDLL5fceNSbSf3fBeTExMR/MEjx4RY APBsWsmm2h6F4dI5xnp1CLlT+7xXYUBlXaKto6npwvtVY0tA6LZsX2xg/hSBUuPFjHmY TEt0/VTHihR23XzQYwiaT5LWmckELDoWz2ui4vy1uhjOD3mX/nLGdHmgNj8a7lxk0VGp 7Fwz3nz+48FuX+A+JAVa+NH8ywqBtcmKSI0JjfWZJXFFl0or6J+fL9F97JpgFdh/5iZH +kfXQlCbLAMUwoG6PqZh5HeaM5jbD0APc9RJkjSVxzhzZkWGk2wgdxyHS8ergnBkBfUo d72g== X-Gm-Message-State: AOAM532rKcbwr/3fDNQuJKdiJ6m3oC1QCW7sm6BXLA6tXDTePEQGysLm 8x04qnwnZICy3TnZKdW8o0e0Q5dxH5w287ZBjM4= X-Google-Smtp-Source: ABdhPJwUeUxTq6/xnaNF5YUbPN0/gffBUovwwhhdE0ZsoJbhgAeURjx7CYH7je5Cb6GvQvADs+z1xQ== X-Received: by 2002:a63:5f49:: with SMTP id t70mr13093837pgb.288.1606762414353; Mon, 30 Nov 2020 10:53:34 -0800 (PST) Received: from btopel-mobl.ger.intel.com ([192.55.55.41]) by smtp.gmail.com with ESMTPSA id i3sm12005978pgq.12.2020.11.30.10.53.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Nov 2020 10:53:33 -0800 (PST) From: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= To: netdev@vger.kernel.org, bpf@vger.kernel.org Cc: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , magnus.karlsson@intel.com, ast@kernel.org, daniel@iogearbox.net, maciej.fijalkowski@intel.com, sridhar.samudrala@intel.com, jesse.brandeburg@intel.com, qi.z.zhang@intel.com, kuba@kernel.org, edumazet@google.com, jonathan.lemon@gmail.com, maximmi@nvidia.com Subject: [PATCH bpf-next v4 09/10] samples/bpf: add busy-poll support to xdpsock Date: Mon, 30 Nov 2020 19:52:04 +0100 Message-Id: <20201130185205.196029-10-bjorn.topel@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201130185205.196029-1-bjorn.topel@gmail.com> References: <20201130185205.196029-1-bjorn.topel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Björn Töpel Add a new option to xdpsock, 'B', for busy-polling. This option will also set the batching size, 'b' option, to the busy-poll budget. Acked-by: Magnus Karlsson Signed-off-by: Björn Töpel --- samples/bpf/xdpsock_user.c | 40 +++++++++++++++++++++++++++++++------- 1 file changed, 33 insertions(+), 7 deletions(-) diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c index a1a3d6f02ba9..4622a17fafe1 100644 --- a/samples/bpf/xdpsock_user.c +++ b/samples/bpf/xdpsock_user.c @@ -95,6 +95,7 @@ static int opt_timeout = 1000; static bool opt_need_wakeup = true; static u32 opt_num_xsks = 1; static u32 prog_id; +static bool opt_busy_poll; struct xsk_ring_stats { unsigned long rx_npkts; @@ -911,6 +912,7 @@ static struct option long_options[] = { {"quiet", no_argument, 0, 'Q'}, {"app-stats", no_argument, 0, 'a'}, {"irq-string", no_argument, 0, 'I'}, + {"busy-poll", no_argument, 0, 'B'}, {0, 0, 0, 0} }; @@ -949,6 +951,7 @@ static void usage(const char *prog) " -Q, --quiet Do not display any stats.\n" " -a, --app-stats Display application (syscall) statistics.\n" " -I, --irq-string Display driver interrupt statistics for interface associated with irq-string.\n" + " -B, --busy-poll Busy poll.\n" "\n"; fprintf(stderr, str, prog, XSK_UMEM__DEFAULT_FRAME_SIZE, opt_batch_size, MIN_PKT_SIZE, MIN_PKT_SIZE, @@ -964,7 +967,7 @@ static void parse_command_line(int argc, char **argv) opterr = 0; for (;;) { - c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:xQaI:", + c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:xQaI:B", long_options, &option_index); if (c == -1) break; @@ -1062,7 +1065,9 @@ static void parse_command_line(int argc, char **argv) fprintf(stderr, "ERROR: Failed to get irqs for %s\n", opt_irq_str); usage(basename(argv[0])); } - + break; + case 'B': + opt_busy_poll = 1; break; default: usage(basename(argv[0])); @@ -1131,7 +1136,7 @@ static inline void complete_tx_l2fwd(struct xsk_socket_info *xsk) while (ret != rcvd) { if (ret < 0) exit_with_error(-ret); - if (xsk_ring_prod__needs_wakeup(&umem->fq)) { + if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&umem->fq)) { xsk->app_stats.fill_fail_polls++; recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, NULL); @@ -1178,7 +1183,7 @@ static void rx_drop(struct xsk_socket_info *xsk) rcvd = xsk_ring_cons__peek(&xsk->rx, opt_batch_size, &idx_rx); if (!rcvd) { - if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) { + if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) { xsk->app_stats.rx_empty_polls++; recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, NULL); } @@ -1189,7 +1194,7 @@ static void rx_drop(struct xsk_socket_info *xsk) while (ret != rcvd) { if (ret < 0) exit_with_error(-ret); - if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) { + if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) { xsk->app_stats.fill_fail_polls++; recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, NULL); } @@ -1341,7 +1346,7 @@ static void l2fwd(struct xsk_socket_info *xsk) rcvd = xsk_ring_cons__peek(&xsk->rx, opt_batch_size, &idx_rx); if (!rcvd) { - if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) { + if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) { xsk->app_stats.rx_empty_polls++; recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, NULL); } @@ -1354,7 +1359,7 @@ static void l2fwd(struct xsk_socket_info *xsk) if (ret < 0) exit_with_error(-ret); complete_tx_l2fwd(xsk); - if (xsk_ring_prod__needs_wakeup(&xsk->tx)) { + if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&xsk->tx)) { xsk->app_stats.tx_wakeup_sendtos++; kick_tx(xsk); } @@ -1459,6 +1464,24 @@ static void enter_xsks_into_map(struct bpf_object *obj) } } +static void apply_setsockopt(struct xsk_socket_info *xsk) +{ + int sock_opt; + + if (!opt_busy_poll) + return; + + sock_opt = 1; + if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_PREFER_BUSY_POLL, + (void *)&sock_opt, sizeof(sock_opt)) < 0) + exit_with_error(errno); + + sock_opt = 20; + if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_BUSY_POLL, + (void *)&sock_opt, sizeof(sock_opt)) < 0) + exit_with_error(errno); +} + int main(int argc, char **argv) { struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; @@ -1500,6 +1523,9 @@ int main(int argc, char **argv) for (i = 0; i < opt_num_xsks; i++) xsks[num_socks++] = xsk_configure_socket(umem, rx, tx); + for (i = 0; i < opt_num_xsks; i++) + apply_setsockopt(xsks[i]); + if (opt_bench == BENCH_TXONLY) { gen_eth_hdr_data();