From: Sujith Manoharan <sujith@msujith.org>
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Message-ID: <20782.54505.239733.82364@gargle.gargle.HOWL> (sfid-20130228_045553_204960_CE303883)
Date: Thu, 28 Feb 2013 09:24:17 +0530
To: Felix Fietkau <nbd@openwrt.org>
Cc: Adrian Chadd <adrian@freebsd.org>,
	"Luis R. Rodriguez" <rodrigue@qca.qualcomm.com>,
	Paul Stewart <pstew@google.com>,
	linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: [RFC] ath9k: remove ath9k_rate_control
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Felix Fietkau wrote:
> I don't see the point in keeping that algorithm around. It has known
> design flaws that make it perform poorly in several scenarios, and
> fixing some of the flaws require basically rewriting it.

I ran some comparison throughput tests between minstrel_ht and ath9k RC
and minstrel showed lower numbers (~10Mbps difference). This is in a clean
environment (OTA). IMO, we can switch the default to minstrel_ht, but keep
the ath9k RC until the perf. gap is fixed. I think this was Google's concern too,
a drop in the average throughput. This was in the STA->AP direction.

In the AP->STA direction (AP: DB120, STA: AR9280), the numbers were really low.
The highest that I could see was ~165 Mbps, while with WNDR3700 (stock FW), the
average throughput was ~185 Mbps and an occasional high of 190 and above.

Sujith