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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" X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1709316645; x=1709921445; darn=lists.osuosl.org; 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=HLuk4EVk5wYWup5M7tIGwBrcsZVVD0GWFO0iQivPnqWmvarUq3skHv3b9b3zJaI+AY zb4CELifhGE11ZhCoJE7I3obTpN6pSxwoEEuHFfXWGwjoA1DB+4Gs+IqyhaW1o2vvbzu VycRjuupDBGmqkro+1opo0cSWVDaQRMjQ7iWweee4IN2p1Y5AoXWl+y+Q7XBF9Jp3TKO YN8lqNW8WKl0gup0x2HDF22sxEFkBpq32R60FU78PpMDO6vVfymLs7fWyIzGV3NKz/wv q79cQecuITZX41OcavgKNWAIYxiC8s+YQUmbOT2lXvYJx4LhK4WsDuJ1gz31+uQn6jBL hgCg== X-Mailman-Original-Authentication-Results: smtp2.osuosl.org; dmarc=pass (p=reject dis=none) header.from=google.com X-Mailman-Original-Authentication-Results: smtp2.osuosl.org; dkim=pass (2048-bit key, unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=HLuk4EVk Subject: Re: [Intel-wired-lan] [PATCH iwl-next, v2 1/2] selftests/bpf: xdp_hw_metadata reduce sleep interval X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kselftest@vger.kernel.org, Florian Bezdeka , Alexei Starovoitov , Andrii Nakryiko , Song Liu , Eric Dumazet , Tony Nguyen , Yonghong Song , Shuah Khan , Mykola Lysenko , xdp-hints@xdp-project.net, Daniel Borkmann , Vinicius Costa Gomes , John Fastabend , Jesse Brandeburg , intel-wired-lan@lists.osuosl.org, Jakub Kicinski , Paolo Abeni , Jesper Dangaard Brouer , Richard Cochran , KP Singh , Hao Luo , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Eduard Zingerman , Jiri Olsa , bpf@vger.kernel.org, Martin KaFai Lau , "David S . Miller" Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" 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