Development issues regarding the cerowrt test router project
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From: Sujith Manoharan <sujith@msujith.org>
To: Dave Taht <dave.taht@gmail.com>
Cc: "cerowrt-devel@lists.bufferbloat.net"
	<cerowrt-devel@lists.bufferbloat.net>
Subject: Re: [Cerowrt-devel] looking over ampdu stats
Date: Mon, 20 Jan 2014 08:57:40 +0530	[thread overview]
Message-ID: <21212.38828.910370.71395@gargle.gargle.HOWL> (raw)
In-Reply-To: <CAA93jw4BjXJHSc1ibLP4zCGDMtucr=g7Jd_2US2QFTRZLT4W_w@mail.gmail.com>

Dave Taht wrote:
> in my tests, we almost never see more than 2 AMPDUs stacked up. (just
> running netperf, not rrul).

2 is the minimum queue depth to aggregate packets. From ath9k.h:
#define ATH_AGGR_MIN_QDEPTH 2

> This could be the fault of the client device I'm using...

This is not a bug with the client.

> cat /sys/kernel/debug/ieee80211/phy1/ath9k/queues
> 
> (note: have set the default be_qlen to the default here)
> 
> (VO):  qnum: 0 qdepth:  0 ampdu-depth:  0 pending:   0 stopped: 0
> (VI):  qnum: 1 qdepth:  0 ampdu-depth:  0 pending:   0 stopped: 0
> (BE):  qnum: 2 qdepth:  3 ampdu-depth:  2 pending:  60 stopped: 0
> (BK):  qnum: 3 qdepth:  0 ampdu-depth:  0 pending:   0 stopped: 0
> (CAB): qnum: 8 qdepth:  0 ampdu-depth:  0 pending:   0 stopped: 0

qlen will not affect the minimum aggregate threshold, so adjusting
be_qlen will not affect aggregation.

Sujith

  reply	other threads:[~2014-01-20  3:33 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-19 17:20 Dave Taht
2014-01-20  3:27 ` Sujith Manoharan [this message]
2014-01-20  3:38   ` Dave Taht
2014-01-20  3:55     ` Sujith Manoharan
2014-01-20 15:09       ` David P. Reed
2014-01-20 15:35         ` Sujith Manoharan

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