From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E813B4315C for ; Tue, 27 May 2025 10:34:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748342042; cv=none; b=A3vAiWKhEzXjqctX/4iBb1uD0x7NsIqNOXno1unp15tnunpS6BEARRnF2bBeIkB3AOJEQXsSzVy7Yi47fGwPzUQJSLRvuYbteCKlCYwRtFeSsrmoH+Gg9kgTnzXry5QqULQ09S525zHagfQaCcZPrMxkh/YxY1dPok2yl6CydpQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748342042; c=relaxed/simple; bh=/sXIZErf6k3wzy66bgvlT1IymRhPSE1K1esXEiM3KAU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=LT81I33AXN1vjjxSKThVbtiK2aX2mCvKs3T2B63wqh8AJ1elA6VszG293sqNsvI+USbEmyIxS0G3ub5rPaFwoJ0OpvLjNwm1FtZ3kQmjWhTh/opPU/GBNfOz3Ht1x1vEM2fNwW57nRC289jTYm6ewftg7I/gp6A1yhiuoQ3E7o4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=b3DoaXCa; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="b3DoaXCa" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1748342041; x=1779878041; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=/sXIZErf6k3wzy66bgvlT1IymRhPSE1K1esXEiM3KAU=; b=b3DoaXCaRpm0m4Nx94LT9TXbsUjzLBWKr1jLWuHsHrYEx2h9XGWFgnVV wWPaaJ3d/O7oJI6ooGGAlS22tki5BicMzXRnKCAwvvRfFihUo1iSEpj7X 0HLGO9Rjvnx1IWOv0bawAyxP/2SzjbTZwFGesjESyuEgTv092q4Ev/5G8 Q4kAecDWV9A3ChFqZYjQ7fckmVB+/X2O0Fimp/xhBfzTnZ/rOD/kXgjb0 gfLqP7SXGEK5WifRmGeSkC47TaHm0wZjOErYuOEOmPf3+bRrutjQxMVk2 PujoRwotV93yrGDrejjo5Ka2ZR9IDC2zOpxj4iebqsfv+CuMKyDvS5lvs g==; X-CSE-ConnectionGUID: B6qGtkItTGWHm51PHIBIbA== X-CSE-MsgGUID: BSlVTMT4SMW6AA2K30+BwA== X-IronPort-AV: E=McAfee;i="6700,10204,11445"; a="60575517" X-IronPort-AV: E=Sophos;i="6.15,318,1739865600"; d="scan'208";a="60575517" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 May 2025 03:34:00 -0700 X-CSE-ConnectionGUID: zX6uEHb6Sp2QVJfCiEuTgQ== X-CSE-MsgGUID: Y47J0XAaTsu57jH+Yk0/Ag== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,318,1739865600"; d="scan'208";a="146633571" Received: from black.fi.intel.com ([10.237.72.28]) by fmviesa003.fm.intel.com with ESMTP; 27 May 2025 03:33:58 -0700 Received: by black.fi.intel.com (Postfix, from userid 1001) id BEF07139; Tue, 27 May 2025 13:33:56 +0300 (EEST) Date: Tue, 27 May 2025 13:33:56 +0300 From: Mika Westerberg To: Ricard Bejarano Cc: netdev@vger.kernel.org, michael.jamet@intel.com, YehezkelShB@gmail.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Subject: Re: Poor thunderbolt-net interface performance when bridged Message-ID: <20250527103356.GS88033@black.fi.intel.com> References: <20250523110743.GK88033@black.fi.intel.com> <353118D9-E9FF-4718-A33A-54155C170693@bejarano.io> <20250526045004.GL88033@black.fi.intel.com> <5DE64000-782A-492C-A653-7EB758D28283@bejarano.io> <20250526092220.GO88033@black.fi.intel.com> <4930C763-C75F-430A-B26C-60451E629B09@bejarano.io> <20250526120413.GQ88033@black.fi.intel.com> <55F20E80-6382-43EA-91E0-C3B2237D79B7@bejarano.io> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <55F20E80-6382-43EA-91E0-C3B2237D79B7@bejarano.io> On Mon, May 26, 2025 at 06:10:44PM +0200, Ricard Bejarano wrote: > > Do you see that asymmetry with only single link? E.g with two (just two) > > hosts? If yes can you provide full dmesg of the both sides? > > No. You can see that in [4.6.1a] and [4.6.1a]. When red and blue talk to each > other directly, speed is ~9Gbps both ways. Okay that's good to know. One thing that may or may not affect but I think is worth mentioning. The hardware has support for end-to-end flow control to avoid packet loss and that's enabled by default. You can turn it off by passing "thunderbolt_net.e2e=0" in the kernel command line (or when loading the module).