From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lj1-x22e.google.com (mail-lj1-x22e.google.com [IPv6:2a00:1450:4864:20::22e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 31BEE3B2A4 for ; Thu, 20 Oct 2022 13:59:50 -0400 (EDT) Received: by mail-lj1-x22e.google.com with SMTP id m23so394857lji.2 for ; Thu, 20 Oct 2022 10:59:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=5KQU862OCoIFnRDBTmW6tcz6qMw+326qLTfNYoQLHqc=; b=FkW7aPAvPEwOemiuQYMvPGwrRFAlVRRTEQ5T3OszAJeZspuFa9055jjsc409CennLy f+qkQEUJGFKHRVFAhj56tl+VSXRXddUM5UH87rOiCAiaAFcDIq8CdjCWWX+MoW4chq3M 1EJh+3/9zI7a8QS8F1Gg8hessmO5IGqYHoF/M= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=5KQU862OCoIFnRDBTmW6tcz6qMw+326qLTfNYoQLHqc=; b=UDHWR7a+Dz95jLOK5y9RvGr7ujKYWygc4Dwrw8XbIggGXvXSY2yQnlOgIz4m207cBq rTwezh3iXF6J9WZj8JQTHEEeTsdtgsmLh5rQEuSE7Cky4vl0/5cq0R59e0/rqawewgMS 9BmD8px4boIk/1jVBMknDoxyVS8u6qCouxdo1WX6H8/trNw2m7sEtnasm0JPezFfVmi3 873DB8Ai/amFzoCRuoC7MGSSsHhN9C6TSxxRCNooHvSQ9Is9sBDw2cH3xhEZZim4cNG5 vnXuwPa5O5kUDIiklDNq43JBFpkLT9+5YpEv7Tuba4H3e31t7DSRFmi2tTzt7i4bZmvn ogFw== X-Gm-Message-State: ACrzQf2Kgm3MjGtao92M1ok9nObADoT+GDez56GmBLDG4s9eKu1nT+L+ Oh5OH+O3QW+Xn94UYaegvYOOzltvYlMgKN9c3m94EvReYevzTG8QZcuQvrRxHYWj3/fn1rzBxPe TFgMr5gQwRjggCnXkoU5M12Wi8DLF35rO61zzbXTfj/WHBCKnaA== X-Google-Smtp-Source: AMsMyM4Q1g9YrEyEzD9U8AAzyBfD7tpDFvVx5D0ZsxEGQY1FMFJ1sJa22a2zoVWuQFkRV4Kyb1VpJ3vpiJLi7wsQ0Vg= X-Received: by 2002:a2e:860d:0:b0:26f:c230:b61c with SMTP id a13-20020a2e860d000000b0026fc230b61cmr4927600lji.107.1666288788584; Thu, 20 Oct 2022 10:59:48 -0700 (PDT) MIME-Version: 1.0 References: <938D9D45-DADA-4291-BD8A-84E4257CEE49@apple.com> <31A8072A-2482-4395-A521-64350035D8DD@gmx.de> <99C2D8FB-E05B-4EFA-8691-6CF3E4530686@gmx.de> <29DA4EA7-AB47-4A47-8448-45F13038AE43@gmx.de> In-Reply-To: <29DA4EA7-AB47-4A47-8448-45F13038AE43@gmx.de> From: Bob McMahon Date: Thu, 20 Oct 2022 10:59:35 -0700 Message-ID: To: Sebastian Moeller Cc: Jeremy Harris , Jeremy Harris via Make-wifi-fast Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000005e4a8a05eb7b17d3" Subject: Re: [Make-wifi-fast] [Bloat] A quick report from the WISPA conference X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Oct 2022 17:59:50 -0000 --0000000000005e4a8a05eb7b17d3 Content-Type: multipart/alternative; boundary="0000000000005657b505eb7b1719" --0000000000005657b505eb7b1719 Content-Type: text/plain; charset="UTF-8" Iperf on the Router/AP CPU sources and sinks traffic. The Router/AP hardware acceleration forwards traffic. These can be very different logic subsystems. One can sometimes connect a computer to the wired LAN port and measure traffic between WiFi and the wired LAN port to get forwarding performance. Also, the iperf 2 bounceback feature, using low duty cycle traffic, may be sufficient to give WiFi responsiveness metrics even with the Router CPU sourcing and sinking the traffic. Your mileage will vary applies. Bob On Thu, Oct 20, 2022 at 8:57 AM Sebastian Moeller via Make-wifi-fast < make-wifi-fast@lists.bufferbloat.net> wrote: > Hi Jeremy, > > On 20 October 2022 16:50:43 CEST, Jeremy Harris via Make-wifi-fast < > make-wifi-fast@lists.bufferbloat.net> wrote: > >On 20/10/2022 10:01, Sebastian Moeller via Make-wifi-fast wrote: > >> [SM] IIRC some router SoC allow higher routing throughput than they can > sink or source bulk traffic with iperf. This is especially pronounced in > routers that use soft- and especially hardware acceleration > > > >Why do you think that iperf traffic will not be accelerated? > > [SM] Because for sending and receiving data in the iperf application the > CPU has to handle the traffic, while accelerator mainly work by having the > CPU touch the data as little as possible/not at all. > > Regards > Sebastian > > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any use, copying, distributing, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you received this e-mail in error, please return the e-mail to the sender, delete it from your computer, and destroy any printed copy of it. --0000000000005657b505eb7b1719 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Iperf on the Router/AP CPU sources and sinks traffic. The = Router/AP hardware acceleration forwards traffic. These can be very differe= nt logic subsystems.

One can sometimes connect a computer to the wir= ed LAN port and measure traffic between=C2=A0WiFi and the wired LAN port to= get forwarding performance.

Also, the iperf 2 bounceback feature, using low duty cycl= e traffic, may be sufficient to give WiFi responsiveness metrics even with = the Router CPU sourcing and sinking the traffic.=C2=A0 Your mileage will va= ry applies.

Bob

On Thu, Oct 20, 2022 at 8:57 AM Sebastian Moeller via= Make-wifi-fast <make-wifi-fast@lists.bufferbloat.net> wrote:
Hi Jeremy,

On 20 October 2022 16:50:43 CEST, Jeremy Harris via Make-wifi-fast <make-= wifi-fast@lists.bufferbloat.net> wrote:
>On 20/10/2022 10:01, Sebastian Moeller via Make-wifi-fast wrote:
>> [SM] IIRC some router SoC allow higher routing throughput than the= y can sink or source bulk traffic with iperf. This is especially pronounced= in routers that use soft- and especially hardware acceleration
>
>Why do you think that iperf traffic will not be accelerated?

[SM] Because for sending and receiving data in the iperf application the CP= U has to handle the traffic, while accelerator mainly work by having the CP= U touch the data as little as possible/not at all.

Regards
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Sebastian

--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
_______________________________________________
Make-wifi-fast mailing list
M= ake-wifi-fast@lists.bufferbloat.net
https://lists.bufferbloat.net/listinfo/make-wif= i-fast

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