From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-x242.google.com (mail-ob0-x242.google.com [IPv6:2607:f8b0:4003:c01::242]) (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 659E83B260; Thu, 5 May 2016 12:25:53 -0400 (EDT) Received: by mail-ob0-x242.google.com with SMTP id ds10so5328234obb.3; Thu, 05 May 2016 09:25:53 -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; bh=zJEm8q79J6O7XVxhR9+H/Rp/kHO8WX7YPoV1zGQZ0kw=; b=qUQwpadqK3Qn3m7y33dTh7HN/SuPfpmE3m/+mNt76zkeK/KX98xWGTfHGawB72xluN ckgSwLedieduD2Wq9vnHWdUkiBKtrZmWT7gkQO/Ld5DqneRH0riI0LHM+cqQLgiCL0Df 63f6tQ14kbJPKOSpA9iDFPcAn+Kn2wYaiGFst0+Wlo+tHPKzrUsK0zY6sw0df5PpvVU0 GpSQehJv/08uVmA7zHw3t1lG4bPoMcmI0vmtxMMqh38rSP4GCWtferQnZBGePhEmM1Hn IYa2NJF1YBdWeOu+YE2L++Ec+kNpvomm9t6izIkfE/KwCouO71gIM1X+Zc6c7mZS0tXm 1P9w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc; bh=zJEm8q79J6O7XVxhR9+H/Rp/kHO8WX7YPoV1zGQZ0kw=; b=HCgZpYEYSfkJm9RZcAwi4iqcoWmwrelKPJEMRcVZSmjN/GKgVoMuqVeoA2PcRJtF40 rCQAdhdt1D8WN9oCehQjNX0Zv6bwpB8/MX6SSu4QIpr0D1rl4AldGbpHUbbgpgPyHCaT Ed0D4m/c5myyJJxUk5Vh6mxXDYU4KNbRU2gsgc9M2WgAXdd1BFMMd1qJdRKtTveGteGq 9bQjqUdFV+W3MbcH2WSzw+iCue2vNbTbs6kzkETcdLzqJGsaDvoviA4/PxbA/dHju21e QOVP48iM1Hc1xsQYrOgkIKaGdHZYQWHxdVXXwM9FBu/ELrPBzErm1chVvcs4l3uxoA7S PmKg== X-Gm-Message-State: AOPr4FW0w0t5DCVIJCtvb49qS57UzZqv4/tg34tO3ijwOu/o3f3G8KdS+ws3tm0rGnj6JcsrW0so4IT+oU9CuQ== MIME-Version: 1.0 X-Received: by 10.60.51.201 with SMTP id m9mr5656379oeo.39.1462465552943; Thu, 05 May 2016 09:25:52 -0700 (PDT) Received: by 10.202.252.9 with HTTP; Thu, 5 May 2016 09:25:52 -0700 (PDT) In-Reply-To: <1462464776.13075.18.camel@edumazet-glaptop3.roam.corp.google.com> References: <1462125592.5535.194.camel@edumazet-glaptop3.roam.corp.google.com> <865DA393-262D-40B6-A9D3-1B978CD5F6C6@gmail.com> <1462128385.5535.200.camel@edumazet-glaptop3.roam.corp.google.com> <1462136140.5535.219.camel@edumazet-glaptop3.roam.corp.google.com> <1462201620.5535.250.camel@edumazet-glaptop3.roam.corp.google.com> <1462205669.5535.254.camel@edumazet-glaptop3.roam.corp.google.com> <1462464776.13075.18.camel@edumazet-glaptop3.roam.corp.google.com> Date: Thu, 5 May 2016 19:25:52 +0300 Message-ID: From: Roman Yeryomin To: Eric Dumazet Cc: Jonathan Morton , make-wifi-fast@lists.bufferbloat.net, "codel@lists.bufferbloat.net" , Dave Taht , ath10k Content-Type: text/plain; charset=UTF-8 Subject: Re: [Codel] fq_codel_drop vs a udp flood X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 May 2016 16:25:53 -0000 On 5 May 2016 at 19:12, Eric Dumazet wrote: > On Thu, 2016-05-05 at 17:53 +0300, Roman Yeryomin wrote: > >> >> qdisc fq_codel 0: dev eth0 root refcnt 2 limit 1024p flows 1024 >> quantum 1514 target 5.0ms interval 100.0ms ecn >> Sent 12306 bytes 128 pkt (dropped 0, overlimits 0 requeues 0) >> backlog 0b 0p requeues 0 >> maxpacket 0 drop_overlimit 0 new_flow_count 0 ecn_mark 0 >> new_flows_len 0 old_flows_len 0 > > > Limit of 1024 packets and 1024 flows is not wise I think. > > (If all buckets are in use, each bucket has a virtual queue of 1 packet, > which is almost the same than having no queue at all) > > I suggest to have at least 8 packets per bucket, to let Codel have a > chance to trigger. > > So you could either reduce number of buckets to 128 (if memory is > tight), or increase limit to 8192. Will try, but what I've posted is default, I didn't change/configure that. Regards, Roman