linux-kernel - Re: N900, wl1251: wifi is now slow, even with powersave off

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Message-ID: <20160618225554.GA27771@amd>
Date:	Sun, 19 Jun 2016 00:55:54 +0200
From:	Pavel Machek <pavel@....cz>
To:	pali.rohar@...il.com, sre@...nel.org,
	kernel list <linux-kernel@...r.kernel.org>,
	aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
	patrikbachan@...il.com, serge@...lyn.com,
	linux-wireless@...r.kernel.org
Subject: Re: N900, wl1251: wifi is now slow, even with powersave off

Hi!

> Ping to N900:
> 
> 64 bytes from maemo (10.0.0.8): icmp_seq=187 ttl=64 time=124 ms
> rtt min/avg/max/mdev = 4.382/101.866/453.145/42.395 ms
> root@duo:/data/pavel#
> 
> Now on n900:
> 
> pavel@...0:/my/tui/ofone$ sudo iw dev wlan0 set power_save off
> pavel@...0:/my/tui/ofone$
> 
> That should bring ping back to < 2 msec range, but nothing changes:
> 
> root@duo:/data/pavel# ping maemo
> PING maemo (10.0.0.8) 56(84) bytes of data.
> 64 bytes from maemo (10.0.0.8): icmp_seq=1 ttl=64 time=78.5 ms
> rtt min/avg/max/mdev = 18.298/68.025/118.223/30.756 ms
> root@duo:/data/pavel#
> 
> Any ideas what is going on there?

v4.4: works ok, rtt min/avg/max/mdev = 2.111/2.243/2.524/0.150 ms
v4.5-rc0: can't get wifi to work.
v4.6: slow as described.
v4.7-rc3: slow as described.

Even confirming you see same problem would help :-).

Thanks,
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html