From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by mail.toke.dk (Postfix) with ESMTPS id AA9B2A588DD for ; Fri, 1 Mar 2024 19:10:47 +0100 (CET) Authentication-Results: mail.toke.dk; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=N04c4HVz Received: by mail-pg1-x549.google.com with SMTP id 41be03b00d2f7-5cf555b2a53so2309968a12.1 for ; Fri, 01 Mar 2024 10:10:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1709316645; x=1709921445; darn=xdp-project.net; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=pgwkJ5zBKIvalm1RJIrALe5y36weQ/YKYrh2qwof5jE=; b=N04c4HVzi0tyh4Q7P3p6359B4GyWC2WhLwLxEFgL9D922rmxcQCBdkBQRk/2O2Q/2E L+4eh2Eau4SMw1HVxdb8mZL1QnPcoIpvRFJjFAH7ak2Yhz28l6wRjZYI6U8W18Vg2aJp g8XCrAcXHz9emp3T0PsBPFC1oE33Vnk96GMvSvZ0GeBSR7sOJ8HCHAxUkHrGhK1H3Ykg RIG2nGB8/nYJwstfL/N6+YrTSHQfY+AC0a8NK5gPE3jDdf5lVHrkOLa/LFORwaSwYtk6 lsY6dNJxPzNiZ1z83v4FUmcWfuYLE8Hb/s2Ehanhws3FguX6YVjxxj4TRtETWGqd7w1L dv/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709316645; x=1709921445; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=pgwkJ5zBKIvalm1RJIrALe5y36weQ/YKYrh2qwof5jE=; b=q9pNYK0mBI2Bux5U/kBrcG+CYrKtELbN5TAAk9PKd/iV7IX4QcYD8QNLiwioQaLYHv oym/RMwcsx6mqCZmvxANKflGkmxlzXPRo8DhJD4RV0QIKeLU4m9wbHGiHJ/z3faDwUTn IG2o47i7eDjelJxQt9Sv6wv0cQDXNXcRu67tJvcHBvvRif6PlR+9oh+MWDNl04+VftMp mUzBxzIrU51+ZcM9SfR+2gNUNyFqAZ5hxUEEB2/fIBd+7r1gUnFQo5edL92+GmvbtVMk ykQex++VmkW0LCuysS6InJOYd5bb16B+y2cwjauzL+QTJkLh6OSeSj728p/tCOYPLhwI kyiw== X-Forwarded-Encrypted: i=1; AJvYcCU7C/k7H/o0loXhy5LipxV2m4b7GLfIAY7bYLVfCAgCU+LvJN7hnBFZ+HzqeG1zw7EXwBx9qM9jhabFU9pH63g9dBAvtKWVAQXe X-Gm-Message-State: AOJu0Yz6xtV2LBS3hQ8YJ66TJEw1SBEe/2LnO+eYtE4vRDJsBjCtyvVZ tLoQEqtDFtq6WgyRmq3VNpOoA80Bahqj69W6I7NVauNgbcZ/gKSYMzwm23yNLO4e2w== X-Google-Smtp-Source: AGHT+IEGDx0IBS91RwXiEWVsOKX4bVPCV9F+AXiFnctjT3PsNi+Tc0z/aXyoMVHCH/0MRr3/ArbUUwo= X-Received: from sdf.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5935]) (user=sdf job=sendgmr) by 2002:a17:90b:3741:b0:29a:a70d:e5ce with SMTP id ne1-20020a17090b374100b0029aa70de5cemr24534pjb.3.1709316645070; Fri, 01 Mar 2024 10:10:45 -0800 (PST) Date: Fri, 1 Mar 2024 10:10:43 -0800 In-Reply-To: <20240301162348.898619-2-yoong.siang.song@intel.com> Mime-Version: 1.0 References: <20240301162348.898619-1-yoong.siang.song@intel.com> <20240301162348.898619-2-yoong.siang.song@intel.com> Message-ID: From: Stanislav Fomichev To: Song Yoong Siang Content-Type: text/plain; charset="utf-8" Message-ID-Hash: PX56MVNZ73Q2TCIPX7SAISUZHIVMW7MO X-Message-ID-Hash: PX56MVNZ73Q2TCIPX7SAISUZHIVMW7MO X-MailFrom: 3JRriZQMKCRgG134CC492.0CAL1D-56BHGL1D-DFC720H.B2H@flex--sdf.bounces.google.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Jesse Brandeburg , Tony Nguyen , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Richard Cochran , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Vinicius Costa Gomes , Florian Bezdeka , Andrii Nakryiko , Eduard Zingerman , Mykola Lysenko , Martin KaFai Lau , Song Liu , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , Shuah Khan , intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, xdp-hints@xdp-project.net X-Mailman-Version: 3.3.9 Precedence: list Subject: [xdp-hints] Re: [PATCH iwl-next,v2 1/2] selftests/bpf: xdp_hw_metadata reduce sleep interval List-Id: XDP hardware hints design discussion Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On 03/02, Song Yoong Siang wrote: > In current ping-pong design, xdp_hw_metadata will wait until the packet > transmition completely done, then only start to receive the next packet. > > The current sleep interval is 10ms, which is unnecessary large. Typically, > a NIC does not need such a long time to transmit a packet. Furthermore, > during this 10ms sleep time, the app is unable to receive incoming packets. > > Therefore, this commit reduce sleep interval to 10us, so that > xdp_hw_metadata able to support periodic packets with shorter interval. > 10us * 500 = 5ms should be enough for packet transmission and status > retrival. > > Signed-off-by: Song Yoong Siang Acked-by: Stanislav Fomichev