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 X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A4DDC43441 for ; Tue, 20 Nov 2018 00:20:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D407820851 for ; Tue, 20 Nov 2018 00:20:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D407820851 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=candelatech.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-wireless-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731284AbeKTKrB (ORCPT ); Tue, 20 Nov 2018 05:47:01 -0500 Received: from mail2.candelatech.com ([208.74.158.173]:44758 "EHLO mail2.candelatech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725961AbeKTKrB (ORCPT ); Tue, 20 Nov 2018 05:47:01 -0500 Received: from [192.168.100.149] (firewall.candelatech.com [50.251.239.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail2.candelatech.com (Postfix) with ESMTPSA id CD5DE40A5A2; Mon, 19 Nov 2018 16:20:42 -0800 (PST) Subject: Re: [Make-wifi-fast] [PATCH v3 3/6] mac80211: Add airtime accounting and scheduling to TXQs To: Dave Taht References: <1542063113-22438-1-git-send-email-rmanohar@codeaurora.org> <1542063113-22438-4-git-send-email-rmanohar@codeaurora.org> <871s7nv9pl.fsf@toke.dk> <8e7847ff-4c88-10ae-2223-2fc7321641d9@nbd.name> <87sh02tfsp.fsf@toke.dk> <878t1p2bqz.fsf@taht.net> <87muq4sn50.fsf@toke.dk> <4DD985B6-7DBE-42F8-AC87-D6B40CEAE553@superduper.net> Cc: =?UTF-8?Q?Toke_H=c3=b8iland-J=c3=b8rgensen?= , Rajkumar Manoharan , Make-Wifi-fast , Simon Barber , linux-wireless , ath10k , Felix Fietkau From: Ben Greear Organization: Candela Technologies Message-ID: <6beaeb84-b705-335b-93a7-36176495099b@candelatech.com> Date: Mon, 19 Nov 2018 16:20:42 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On 11/19/2018 04:13 PM, Dave Taht wrote: > On Mon, Nov 19, 2018 at 3:56 PM Ben Greear wrote: >> >> On 11/19/2018 03:47 PM, Dave Taht wrote: >>> On Mon, Nov 19, 2018 at 3:30 PM Simon Barber wrote: >>>> >>>> >>>> >>>> On Nov 19, 2018, at 2:44 PM, Toke Høiland-Jørgensen wrote: >>>> >>>> Dave Taht writes: >>>> >>>> Toke Høiland-Jørgensen writes: >>>> >>>> Felix Fietkau writes: >>>> >>>> On 2018-11-14 18:40, Toke Høiland-Jørgensen wrote: >>>> >>>> This part doesn't really make much sense to me, but maybe I'm >>>> misunderstanding how the code works. >>>> Let's assume we have a driver like ath9k or mt76, which tries to keep a >>>> >>>> …. >>>> >>>> >>>> Well, there's going to be a BQL-like queue limit (but for airtime) on >>>> top, which drivers can opt-in to if the hardware has too much queueing. >>>> >>>> >>>> Very happy to read this - I first talked to Dave Taht about the need for Time Queue Limits more than 5 years ago! >>> >>> Michal faked up a dql estimator 3 (?) years ago. it worked. >>> >>> http://blog.cerowrt.org/post/dql_on_wifi_2/ >>> >>> As a side note, in *any* real world working mu-mimo situation at any >>> scale, on any equipment, does anyone have any stats on how often the >>> feature is actually used and useful? >>> >>> My personal guess, from looking at the standard, was in home >>> scenarios, usage would be about... 0, and in a controlled environment >>> in a football stadium, quite a lot. >>> >>> In a office or apartment complex, I figured interference and so forth >>> would make it a negative benefit due to retransmits. >>> >>> I felt when that part of the standard rolled around... that mu-mimo >>> was an idea that should never have escaped the lab. I can be convinced >>> by data, that we can aim for a higher goal here. But it would be >>> comforting to have a measured non-lab, real-world, at real world >>> rates, result for it, on some platform, of it actually being useful. >> >> We're working on building a lab with 20 or 30 mixed 'real' devices >> using various different /AC NICs (QCA wave2 on OpenWRT, Fedora, realtek USB 8812au on OpenWRT, Fedora, >> and some Intel NICs in NUCs on Windows, and maybe more). I'm not actually sure if that realtek >> or the NUCs can do MU-MIMO or not, but the QCA NICs will be able to. It should be at least somewhat similar >> to a classroom environment or coffee shop. > > In the last 3 coffee shops I went to, I could hear over 30 APs on > competing SSIDs, running G, N, and AC, > occupying every available channel. I especially like when someone uses channel 3 because, I guess, they think it is un-used :) I'm not sure if this was a fluke or not, but at Starbucks recently I sat outside, right next to their window, and could not scan their AP at all. Previously, I sat inside, 3 feet away through the glass, and got great signal. I wonder what that was all about! Maybe special tinting that blocks RF? Or just dumb luck of some sort. Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail2.candelatech.com ([208.74.158.173]) by merlin.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gOtmk-0007lX-AK for ath10k@lists.infradead.org; Tue, 20 Nov 2018 00:20:59 +0000 Subject: Re: [Make-wifi-fast] [PATCH v3 3/6] mac80211: Add airtime accounting and scheduling to TXQs References: <1542063113-22438-1-git-send-email-rmanohar@codeaurora.org> <1542063113-22438-4-git-send-email-rmanohar@codeaurora.org> <871s7nv9pl.fsf@toke.dk> <8e7847ff-4c88-10ae-2223-2fc7321641d9@nbd.name> <87sh02tfsp.fsf@toke.dk> <878t1p2bqz.fsf@taht.net> <87muq4sn50.fsf@toke.dk> <4DD985B6-7DBE-42F8-AC87-D6B40CEAE553@superduper.net> From: Ben Greear Message-ID: <6beaeb84-b705-335b-93a7-36176495099b@candelatech.com> Date: Mon, 19 Nov 2018 16:20:42 -0800 MIME-Version: 1.0 In-Reply-To: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "ath10k" Errors-To: ath10k-bounces+kvalo=adurom.com@lists.infradead.org To: Dave Taht Cc: =?UTF-8?Q?Toke_H=c3=b8iland-J=c3=b8rgensen?= , Rajkumar Manoharan , Make-Wifi-fast , Simon Barber , linux-wireless , ath10k , Felix Fietkau T24gMTEvMTkvMjAxOCAwNDoxMyBQTSwgRGF2ZSBUYWh0IHdyb3RlOgo+IE9uIE1vbiwgTm92IDE5 LCAyMDE4IGF0IDM6NTYgUE0gQmVuIEdyZWVhciA8Z3JlZWFyYkBjYW5kZWxhdGVjaC5jb20+IHdy b3RlOgo+Pgo+PiBPbiAxMS8xOS8yMDE4IDAzOjQ3IFBNLCBEYXZlIFRhaHQgd3JvdGU6Cj4+PiBP biBNb24sIE5vdiAxOSwgMjAxOCBhdCAzOjMwIFBNIFNpbW9uIEJhcmJlciA8c2ltb25Ac3VwZXJk dXBlci5uZXQ+IHdyb3RlOgo+Pj4+Cj4+Pj4KPj4+Pgo+Pj4+IE9uIE5vdiAxOSwgMjAxOCwgYXQg Mjo0NCBQTSwgVG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2VuIDx0b2tlQHRva2UuZGs+IHdyb3RlOgo+ Pj4+Cj4+Pj4gRGF2ZSBUYWh0IDxkYXZlQHRhaHQubmV0PiB3cml0ZXM6Cj4+Pj4KPj4+PiBUb2tl IEjDuGlsYW5kLUrDuHJnZW5zZW4gPHRva2VAdG9rZS5kaz4gd3JpdGVzOgo+Pj4+Cj4+Pj4gRmVs aXggRmlldGthdSA8bmJkQG5iZC5uYW1lPiB3cml0ZXM6Cj4+Pj4KPj4+PiBPbiAyMDE4LTExLTE0 IDE4OjQwLCBUb2tlIEjDuGlsYW5kLUrDuHJnZW5zZW4gd3JvdGU6Cj4+Pj4KPj4+PiBUaGlzIHBh cnQgZG9lc24ndCByZWFsbHkgbWFrZSBtdWNoIHNlbnNlIHRvIG1lLCBidXQgbWF5YmUgSSdtCj4+ Pj4gbWlzdW5kZXJzdGFuZGluZyBob3cgdGhlIGNvZGUgd29ya3MuCj4+Pj4gTGV0J3MgYXNzdW1l IHdlIGhhdmUgYSBkcml2ZXIgbGlrZSBhdGg5ayBvciBtdDc2LCB3aGljaCB0cmllcyB0byBrZWVw IGEKPj4+Pgo+Pj4+IOKApi4KPj4+Pgo+Pj4+Cj4+Pj4gV2VsbCwgdGhlcmUncyBnb2luZyB0byBi ZSBhIEJRTC1saWtlIHF1ZXVlIGxpbWl0IChidXQgZm9yIGFpcnRpbWUpIG9uCj4+Pj4gdG9wLCB3 aGljaCBkcml2ZXJzIGNhbiBvcHQtaW4gdG8gaWYgdGhlIGhhcmR3YXJlIGhhcyB0b28gbXVjaCBx dWV1ZWluZy4KPj4+Pgo+Pj4+Cj4+Pj4gVmVyeSBoYXBweSB0byByZWFkIHRoaXMgLSBJIGZpcnN0 IHRhbGtlZCB0byBEYXZlIFRhaHQgYWJvdXQgdGhlIG5lZWQgZm9yIFRpbWUgUXVldWUgTGltaXRz IG1vcmUgdGhhbiA1IHllYXJzIGFnbyEKPj4+Cj4+PiBNaWNoYWwgZmFrZWQgdXAgYSBkcWwgZXN0 aW1hdG9yIDMgKD8pIHllYXJzIGFnby4gaXQgd29ya2VkLgo+Pj4KPj4+IGh0dHA6Ly9ibG9nLmNl cm93cnQub3JnL3Bvc3QvZHFsX29uX3dpZmlfMi8KPj4+Cj4+PiBBcyBhIHNpZGUgbm90ZSwgaW4g KmFueSogcmVhbCB3b3JsZCB3b3JraW5nIG11LW1pbW8gc2l0dWF0aW9uIGF0IGFueQo+Pj4gc2Nh bGUsIG9uIGFueSBlcXVpcG1lbnQsIGRvZXMgYW55b25lIGhhdmUgYW55IHN0YXRzIG9uIGhvdyBv ZnRlbiB0aGUKPj4+IGZlYXR1cmUgaXMgYWN0dWFsbHkgdXNlZCBhbmQgdXNlZnVsPwo+Pj4KPj4+ IE15IHBlcnNvbmFsIGd1ZXNzLCBmcm9tIGxvb2tpbmcgYXQgdGhlIHN0YW5kYXJkLCB3YXMgaW4g aG9tZQo+Pj4gc2NlbmFyaW9zLCB1c2FnZSB3b3VsZCBiZSBhYm91dC4uLiAwLCBhbmQgaW4gYSBj b250cm9sbGVkIGVudmlyb25tZW50Cj4+PiBpbiBhIGZvb3RiYWxsIHN0YWRpdW0sIHF1aXRlIGEg bG90Lgo+Pj4KPj4+IEluIGEgb2ZmaWNlIG9yIGFwYXJ0bWVudCBjb21wbGV4LCBJIGZpZ3VyZWQg aW50ZXJmZXJlbmNlIGFuZCBzbyBmb3J0aAo+Pj4gd291bGQgbWFrZSBpdCBhIG5lZ2F0aXZlIGJl bmVmaXQgZHVlIHRvIHJldHJhbnNtaXRzLgo+Pj4KPj4+IEkgZmVsdCB3aGVuIHRoYXQgcGFydCBv ZiB0aGUgc3RhbmRhcmQgcm9sbGVkIGFyb3VuZC4uLiB0aGF0IG11LW1pbW8KPj4+IHdhcyBhbiBp ZGVhIHRoYXQgc2hvdWxkIG5ldmVyIGhhdmUgZXNjYXBlZCB0aGUgbGFiLiBJIGNhbiBiZSBjb252 aW5jZWQKPj4+IGJ5IGRhdGEsIHRoYXQgd2UgY2FuIGFpbSBmb3IgYSBoaWdoZXIgZ29hbCBoZXJl LiBCdXQgaXQgd291bGQgYmUKPj4+IGNvbWZvcnRpbmcgdG8gaGF2ZSBhIG1lYXN1cmVkIG5vbi1s YWIsIHJlYWwtd29ybGQsIGF0IHJlYWwgd29ybGQKPj4+IHJhdGVzLCByZXN1bHQgZm9yIGl0LCBv biBzb21lIHBsYXRmb3JtLCBvZiBpdCBhY3R1YWxseSBiZWluZyB1c2VmdWwuCj4+Cj4+IFdlJ3Jl IHdvcmtpbmcgb24gYnVpbGRpbmcgYSBsYWIgd2l0aCAyMCBvciAzMCBtaXhlZCAncmVhbCcgZGV2 aWNlcwo+PiB1c2luZyB2YXJpb3VzIGRpZmZlcmVudCAvQUMgTklDcyAoUUNBIHdhdmUyIG9uIE9w ZW5XUlQsIEZlZG9yYSwgcmVhbHRlayBVU0IgODgxMmF1IG9uIE9wZW5XUlQsIEZlZG9yYSwKPj4g YW5kIHNvbWUgSW50ZWwgTklDcyBpbiBOVUNzIG9uIFdpbmRvd3MsIGFuZCBtYXliZSBtb3JlKS4g IEknbSBub3QgYWN0dWFsbHkgc3VyZSBpZiB0aGF0IHJlYWx0ZWsKPj4gICBvciB0aGUgTlVDcyBj YW4gZG8gTVUtTUlNTyBvciBub3QsIGJ1dCB0aGUgUUNBIE5JQ3Mgd2lsbCBiZSBhYmxlIHRvLiAg SXQgc2hvdWxkIGJlIGF0IGxlYXN0IHNvbWV3aGF0IHNpbWlsYXIKPj4gdG8gYSBjbGFzc3Jvb20g ZW52aXJvbm1lbnQgb3IgY29mZmVlIHNob3AuCj4KPiBJbiB0aGUgbGFzdCAzIGNvZmZlZSBzaG9w cyBJIHdlbnQgdG8sIEkgY291bGQgaGVhciBvdmVyIDMwIEFQcyBvbgo+IGNvbXBldGluZyBTU0lE cywgcnVubmluZyBHLCBOLCBhbmQgQUMsCj4gb2NjdXB5aW5nIGV2ZXJ5IGF2YWlsYWJsZSBjaGFu bmVsLgoKSSBlc3BlY2lhbGx5IGxpa2Ugd2hlbiBzb21lb25lIHVzZXMgY2hhbm5lbCAzIGJlY2F1 c2UsIEkgZ3Vlc3MsIHRoZXkKdGhpbmsgaXQgaXMgdW4tdXNlZCA6KQoKSSdtIG5vdCBzdXJlIGlm IHRoaXMgd2FzIGEgZmx1a2Ugb3Igbm90LCBidXQgYXQgU3RhcmJ1Y2tzIHJlY2VudGx5IEkgc2F0 IG91dHNpZGUsCnJpZ2h0IG5leHQgdG8gdGhlaXIgd2luZG93LCBhbmQgY291bGQgbm90IHNjYW4g dGhlaXIgQVAgYXQgYWxsLiAgUHJldmlvdXNseSwgSSBzYXQKaW5zaWRlLCAzIGZlZXQgYXdheSB0 aHJvdWdoIHRoZSBnbGFzcywgYW5kIGdvdCBncmVhdCBzaWduYWwuICBJIHdvbmRlciB3aGF0IHRo YXQgd2FzCmFsbCBhYm91dCEgIE1heWJlIHNwZWNpYWwgdGludGluZyB0aGF0IGJsb2NrcyBSRj8g IE9yIGp1c3QgZHVtYiBsdWNrIG9mIHNvbWUgc29ydC4KClRoYW5rcywKQmVuCgoKLS0gCkJlbiBH cmVlYXIgPGdyZWVhcmJAY2FuZGVsYXRlY2guY29tPgpDYW5kZWxhIFRlY2hub2xvZ2llcyBJbmMg IGh0dHA6Ly93d3cuY2FuZGVsYXRlY2guY29tCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX18KYXRoMTBrIG1haWxpbmcgbGlzdAphdGgxMGtAbGlzdHMuaW5m cmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2F0 aDEwawo=