From owner-freebsd-wireless@FreeBSD.ORG Fri Oct 11 18:18:59 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 3BDE995F; Fri, 11 Oct 2013 18:18:59 +0000 (UTC) (envelope-from ksramanujan@gmail.com) Received: from mail-ie0-x22b.google.com (mail-ie0-x22b.google.com [IPv6:2607:f8b0:4001:c03::22b]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 0399228FD; Fri, 11 Oct 2013 18:18:58 +0000 (UTC) Received: by mail-ie0-f171.google.com with SMTP id at1so8837332iec.2 for ; Fri, 11 Oct 2013 11:18:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=BiabNxD+Gh7oEZ2hafeqZGxqJWwYxcG9uDn6lh6Az/8=; b=hPoFVcR8AUwLlF+c3PZWHIScvQxUdYh/c8in/uxEOW3e3xy/opXD9dJNMvV2FTA1WR L8RLEc0UzeL86R+GIlCc4NKCQmodcu9dSvseCxVeYWAGnifL2c4hoQyvYFOsdfxYPshG M5vpfV47/nJX6fYSt4nIj2KyT0NkTq4PUTZiJMMlBmszUviCpEetZRNXxq7+12WK00Xr P4gC3nlKgZ457s84mkK34K9fBdkv+RwN3v2Y9qdqT6J/pn+8I/EKyTZrLIt90QCg8TIT cbDbCkmT3EItzOV7r/ri0YDQibBBr7MVx3nWY0473289xUbSJ6SIWfqbMdwmyF3/dqKc sDzQ== MIME-Version: 1.0 X-Received: by 10.50.103.6 with SMTP id fs6mr3916897igb.16.1381515538182; Fri, 11 Oct 2013 11:18:58 -0700 (PDT) Received: by 10.64.82.73 with HTTP; Fri, 11 Oct 2013 11:18:58 -0700 (PDT) In-Reply-To: References: Date: Fri, 11 Oct 2013 14:18:58 -0400 Message-ID: Subject: Re: Ralink RT2860 frame aggregation From: Ramanujan Seshadri To: Adrian Chadd Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 Cc: "freebsd-wireless@freebsd.org" 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: Fri, 11 Oct 2013 18:18:59 -0000 It's in the NIC. But it seems that it sometimes aggregates more than the set BA win size (in the driver). In fact i was wondering - if it can actually achieve up to 80 Mbps throughput with just 8 frames aggregated. In fact the aggregation size doesn't seem to matter much for the throughput because any aggregation from 5-8 seems to get the same throughput. So, i was wondering if this is something weird in NIC or can we do some thing to control it in the driver ? ram On Thu, Oct 10, 2013 at 4:41 PM, Adrian Chadd wrote: > I forget .. is the driver or the NIC itself doing aggregation? > > > -a > > > On 10 October 2013 10:33, Ramanujan Seshadri wrote: > >> 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 >> _______________________________________________ >> freebsd-wireless@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-wireless >> To unsubscribe, send any mail to " >> freebsd-wireless-unsubscribe@freebsd.org" >> > >