From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-vs1-xe29.google.com (mail-vs1-xe29.google.com [IPv6:2607:f8b0:4864:20::e29]) (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 6298B3BA8E for ; Fri, 30 Nov 2018 17:05:39 -0500 (EST) Received: by mail-vs1-xe29.google.com with SMTP id v10so4243321vsv.12 for ; Fri, 30 Nov 2018 14:05:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=0SBByDEhQRlH35GxfvAIntw1/LaITMl6MR4I9bEFDPU=; b=gpq8A3mT6EqKX9CvvHFL5cr0VJFLAgzAtY8YQgloX332SrK0pko1zX9idwhrsoLSPE 9/hFyVXAz+3+xmwYtyd2cou8M7nB0RJK3bB7DbAGxz7eJNefmjI87iOZUxattFnT8f5h jZeeWfoznkuRXB2YPg7L2sMNzPkWyCK9fFtQDagWvhQLGATS9GpyR8sfO85InMeoU+WT owvgWCBtB1qHXWpSlzc4aBPSWQxf9NuTcYa6p96H35BzH5KZgJBbrS/zhlIrLN+nycwF RDDKvHseiBUPwmUGwQ8056FZCW6Ru6YjrfQKHoyW/f6Cvuy2c3wCRzSgZyZpKrMUVGvM zzaQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=0SBByDEhQRlH35GxfvAIntw1/LaITMl6MR4I9bEFDPU=; b=syry9xW92ozIPuE0/VfxlPVrrRyH7hqgOsuXmLYbzWCfJHLDozGqZ6gwerD6/Fx3rk Z5ER7iNCebET6n2p3uS1wHqRIM73khVrM26W51p3ulsoYNMTICDnFZxmDDL2PsKmSo92 scZ9YHRkSsFvyiZSMC/UQJ+rC+GRrjtNAtKIns7HPXWfl0VRLgRrPLB36Pvz9IBYR2fb eWQQq+f+XIlOZiXiJ819ZbEupbleQrZTY0Rn1znGPtK3IfDR3AettFh2Z+1D9GQxlWUr yeQTYcrw3lcjH71aN2w9SJVtYh0Q9j3XzWsZxmOnDBC49DUKCilXNr+vnGvR/x4geKBS MvHQ== X-Gm-Message-State: AA+aEWaFBxBVPDX9ePtKjw8JJSpAfo7P+9X0ou8KVMLs4Ia4w2tAJBIM ZwiamRqA47THJR36FGoBNDPs5LQePyUzbxq9NPG0QiUJ39E= X-Google-Smtp-Source: AFSGD/XJ+ADNps0EAY2HzCp4ZG1CswlxPfPbaYMM9bNpAy+aUjvgj6SHdit+bWgT4LWwE7FqcuNIGoAFKzCZAFdHa2w= X-Received: by 2002:a67:6e87:: with SMTP id j129mr3377169vsc.171.1543615538565; Fri, 30 Nov 2018 14:05:38 -0800 (PST) MIME-Version: 1.0 From: Azin Neishaboori Date: Fri, 30 Nov 2018 17:05:27 -0500 Message-ID: Subject: monitoring queue length To: bloat-devel@lists.bufferbloat.net Content-Type: multipart/alternative; boundary="000000000000d8986c057be8ffdf" X-BeenThere: bloat-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Developers working on AQM, device drivers, and networking stacks" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Nov 2018 22:05:39 -0000 --000000000000d8986c057be8ffdf Content-Type: text/plain; charset="UTF-8" Hi Pardon me if this is too elementary a question. But I am not sure how to see the length of a queue on an interface. I have changed the qdisc configuration from default pfifo_fast to pfifo to get statistics. All I see though is a report on backlog. The output I see is like this: Sent 938609238 bytes 780809 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 I do not know if this backlog is indeed queue length or not. It seems strange to be queue length, because even when I flood the network with high UDP data rates over capacity, it still shows 0b of backlog. Am I looking at the wrong parameter? If so, could you please point out the tool that shows the instantaneous queue length? Thanks a lot --000000000000d8986c057be8ffdf Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi=C2=A0
Pardon me i= f this is too elementary a question. But I am not sure how to see the lengt= h of a queue on an interface. I have changed the qdisc configuration from d= efault pfifo_fast to pfifo to get=C2=A0
statistics. All I see tho= ugh is a report on backlog.=C2=A0

The output = I see is like this:
Sent 938609238 bytes 780809 pkt (dropped 0, o= verlimits 0 requeues 0)
=C2=A0backlog 0b 0p requeues 0

I do not know if this backlog is indeed queue length o= r not. It seems strange to be queue length, because even when I flood the n= etwork with high UDP data rates over capacity, it still shows 0b of backlog= . Am I looking at the wrong parameter? If so, could you please point out th= e tool that shows the instantaneous queue length?

=
Thanks a lot


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