From: Felix Fietkau <nbd@openwrt.org>
To: Larry Finger <Larry.Finger@lwfinger.net>
Cc: wireless <linux-wireless@vger.kernel.org>
Subject: Re: Rate-setting problem with Broadcom 4315
Date: Mon, 26 Oct 2009 05:09:21 +0100 [thread overview]
Message-ID: <4AE520F1.2070704@openwrt.org> (raw)
In-Reply-To: <4AE49F0F.1060901@lwfinger.net>
Larry Finger wrote:
> When my BCM4312 (ID 4315) runs in auto rate mode, the rate stays at
> 1Mb/s. If I manually set the rate, I see a tcpperf throughput ~1/2 the
> rate that I set through a rate of 12 Mb/s. At 36 Mb/s, the rate is
> best at 15.7 Mb/s. Why does mistrel not increase the rate?
>
> The output of /sys/..../rc_stats is:
>
> finger@larrylap:~> cat
> /sys/kernel/debug/ieee80211/phy0/stations/00:14:bf:85:49:fa/rc_stats
> rate throughput ewma prob this prob this succ/attempt
> success attempts
> 1 0.9 99.1 100.0 0( 0) 3244
> 3282
> 2 1.8 95.7 100.0 0( 0) 12
> 12
> 5.5 4.8 95.7 100.0 0( 0) 12
> 12
> 11 9.2 96.8 100.0 0( 0) 12
> 12
> P 6 5.6 99.9 100.0 0( 0) 58
> 58
> 9 8.0 95.7 100.0 0( 0) 11
> 11
> 12 10.6 95.7 100.0 0( 0) 12
> 12
> 18 15.7 96.6 100.0 0( 0) 14
> 15
> 24 20.3 95.7 100.0 0( 0) 11
> 11
> 36 29.0 95.4 94.5 0( 0) 1602
> 1670
> T 48 38.7 99.2 100.0 1( 1) 32147
> 37752
> t 54 32.9 75.9 100.0 0( 0) 8775
> 12788
>
> Total packet count:: ideal 2570 lookaround 135
Was this dump made after you played with manual rate settings? If so,
please make a new one that only contains stats of what it tried with
automatic rate setting enabled.
- Felix
next prev parent reply other threads:[~2009-10-26 4:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-25 18:55 Rate-setting problem with Broadcom 4315 Larry Finger
2009-10-26 4:09 ` Felix Fietkau [this message]
2009-10-26 5:39 ` Larry Finger
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