From: Felix Fietkau <nbd@openwrt.org>
To: Karl Beldan <karl.beldan@gmail.com>,
Johannes Berg <johannes@sipsolutions.net>
Cc: linux-wireless <linux-wireless@vger.kernel.org>,
Karl Beldan <karl.beldan@rivierawaves.com>
Subject: Re: [PATCH] mac80211: use capped prob when computing throughputs
Date: Wed, 20 Nov 2013 17:57:06 +0100 [thread overview]
Message-ID: <528CE9E2.7030707@openwrt.org> (raw)
In-Reply-To: <528C6590.1000803@openwrt.org>
On 2013-11-20 08:32, Felix Fietkau wrote:
> On 2013-11-20 01:51, Karl Beldan wrote:
>> From: Karl Beldan <karl.beldan@rivierawaves.com>
>>
>> Commit 3e8b1eb "mac80211/minstrel_ht: improve rate selection stability"
>> introduced a local capped prob in minstrel_ht_calc_tp but omitted to use
>> it to compute the rate throughput.
>>
>> Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
>> CC: Felix Fietkau <nbd@openwrt.org>
> Nice catch!
> Acked-by: Felix Fietkau <nbd@openwrt.org>
Sorry, I need to revoke that ACK - there's a bug in this patch:
> - tp = 1000000 * ((mr->probability * 1000) / nsecs);
> + tp = 1000000 * (prob * 1000) / nsecs;
Removing the outer () is wrong, it leads to overflow that makes all
throughput values 0.
- Felix
next prev parent reply other threads:[~2013-11-20 16:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-20 0:51 [PATCH] mac80211: use capped prob when computing throughputs Karl Beldan
2013-11-20 7:32 ` Felix Fietkau
2013-11-20 13:56 ` Karl Beldan
2013-11-20 14:04 ` Felix Fietkau
2013-11-20 14:50 ` Karl Beldan
2013-11-20 15:49 ` Felix Fietkau
2013-11-20 16:19 ` Karl Beldan
2013-11-20 17:32 ` Felix Fietkau
2013-11-20 17:53 ` Karl Beldan
2013-11-20 18:24 ` Felix Fietkau
2013-11-20 16:57 ` Felix Fietkau [this message]
2013-11-20 17:03 ` Karl Beldan
2013-11-20 17:04 ` Karl Beldan
2013-11-20 17:37 ` Felix Fietkau
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