From owner-freebsd-wireless@FreeBSD.ORG Thu Oct 10 17:33:40 2013 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 5576CF62 for ; Thu, 10 Oct 2013 17:33:40 +0000 (UTC) (envelope-from ksramanujan@gmail.com) Received: from mail-ie0-x229.google.com (mail-ie0-x229.google.com [IPv6:2607:f8b0:4001:c03::229]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 28D112DF1 for ; Thu, 10 Oct 2013 17:33:40 +0000 (UTC) Received: by mail-ie0-f169.google.com with SMTP id tp5so5877015ieb.14 for ; Thu, 10 Oct 2013 10:33:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=cO6YvggHI4nOfHI4gXFyrjAlu7EIT0RsPalJuGfvtzI=; b=ps3I0VkMOlfYQfSt5SWA8p4V3vrSP9Z7pmA8l5gC6WyuWKyGy9/MMm21Bj9gaJROoK yxTth4Ov8Sn5JIuF6UoJQYpFcaX02PbRsmvEJVmu1INUUFgFH5+N9u2faX2VoKQkV1Lh pNeRzKzcRbH6bREvDnyvx4mjQmKbCZ2dYRzjHc23axNThS21sDUql6SoBnFgdllR3z9q /YUSR/gdXVPcbklduSYcY+buMNqCOdoBCgPa0ShNBkPmc/mu6l6HN1OebHtNvfrYLkdd bX2A9DZyFBZ4i7Jyfyv2zhMUfPnMJeoVkRqdnqCrfcmb/RKnjzFsbzsvwUkdJdTK0b13 sp+Q== MIME-Version: 1.0 X-Received: by 10.50.67.46 with SMTP id k14mr7549639igt.16.1381426419452; Thu, 10 Oct 2013 10:33:39 -0700 (PDT) Received: by 10.64.82.73 with HTTP; Thu, 10 Oct 2013 10:33:39 -0700 (PDT) Date: Thu, 10 Oct 2013 13:33:39 -0400 Message-ID: Subject: Ralink RT2860 frame aggregation From: Ramanujan Seshadri To: freebsd-wireless@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Oct 2013 17:33:40 -0000 Hello all, i was testing some features of ralink rt2860 driver. i saw a bit weird results. below is the result of what i saw. The throughput achieved doesn't change much when the MPDU aggregation in an AMPDU goes from 3 to 8. And also, the driver doesn't seem to aggregate more than 8 MPDU's in an AMPDU even when the BA win size is set to max of 64. i was testing this by fixing the rate at MCS 15 Is there anything else i need to do to force the driver to aggregate more MPDU's in an AMPDU ? BA Win Size No. of MPDU's Throughput(Mbps) aggregated 1. 64 7-8 85.7 2. 32 6-7 84.2 3. 16 6-7 81.7 4. 8 6-7 79.9 5. 4 5 84.7 6. 2 3 71.8 7. 1 2 73.5 Thanks ram