From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 42491C021AA for ; Tue, 18 Feb 2025 16:25:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=gwx1IfTKh1rDEZJZPwub8nyeYTYzilJEqxSN8ou+0bA=; b=XXXtu69uz7hrcH7vu8EKPcLgXJ Xvg9liIxax0OQhSrosOC66uOgciH0jVlqUXK/4wdC2CBaoOOq8mZzePT35iRAHlBWCl4zZJRbFugk Iqs1/HtUZryUEnaF8rXV3BlWIlzs5GC7jgwCb0v0vkM+X48AhvYJR2qCtR9vwU0U4kiod5B080YQp v6TbBOO+Fj5soYFXhKLuyzRQOgm/eCmTH1VjVNc2DO5+GMAhoTB5YV1FHcfQdSfVGG/2Bax+Wk+sQ HwPtGsRIv4mflL76/yukWFKnoqSAUGjANA6r/1bttoHc2m84hdhnrCnetTwROi/qVPM6sdQ09Tif+ v1WrS06Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tkQPP-00000008xEX-3vcz; Tue, 18 Feb 2025 16:25:19 +0000 Received: from out-180.mta0.migadu.com ([2001:41d0:1004:224b::b4]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tkQId-00000008vdj-0wHo for linux-arm-kernel@lists.infradead.org; Tue, 18 Feb 2025 16:18:20 +0000 Message-ID: <7446c987-3286-4b8a-a105-96443275d4d4@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1739895496; 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: in-reply-to:in-reply-to:references:references; bh=gwx1IfTKh1rDEZJZPwub8nyeYTYzilJEqxSN8ou+0bA=; b=E/1xu/wM2vYeLhBelvWB1ep+Erfy5NmqLoD18c34a+RTGqEMMLuJWDWww4FNlWeRqTnMvU FBrQAhQ35VNhqWo0A23fqx9r3saaVlbNJW68Y2I2ltIg0PFt4FQd1IhHYebD1qpHbXo9FX I/qF3/bQpYDcElBYNYFJpRqvhtYWFmc= Date: Tue, 18 Feb 2025 11:18:12 -0500 MIME-Version: 1.0 Subject: Re: [PATCH net-next] net: xilinx: axienet: Implement BQL To: Andrew Lunn Cc: "Gupta, Suraj" , "Pandey, Radhey Shyam" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Paolo Abeni , "David S . Miller" , Jakub Kicinski , "Simek, Michal" , "linux-arm-kernel@lists.infradead.org" , Eric Dumazet , Andrew Lunn References: <20250214211252.2615573-1-sean.anderson@linux.dev> Content-Language: en-US X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Sean Anderson In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250218_081819_472000_D16F6A2B X-CRM114-Status: UNSURE ( 8.69 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2/18/25 11:16, Andrew Lunn wrote: >> > Could you please check if BQL can be implemented for DMAengine flow? >> >> I can have a look, but TBH I do not test the dma engine configuration since it is >> so much slower. > > It might actually benefit more from BQL if it is slower? Actually, it will benefit less. The hardware is the same, so the slowdown is entirely due to extra CPU overhead. From the CPU's perspective, the queues actually drain faster than normal. --Sean