linux-kernel - Re: rtl8187 rate control doesn't work

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080112202854.2c24ba19@morte>
Date:	Sat, 12 Jan 2008 20:28:54 +0100
From:	Stefano Brivio <stefano.brivio@...imi.it>
To:	Hauke Mehrtens <hauke@...ke-m.de>
Cc:	"Luis R. Rodriguez" <mcgrof@...lab.rutgers.edu>,
	Michael Wu <flamingice@...rmilk.net>,
	linux-kernel@...r.kernel.org,
	linux-wireless <linux-wireless@...r.kernel.org>
Subject: Re: rtl8187 rate control doesn't work

On Sat, 12 Jan 2008 19:23:53 +0100
Hauke Mehrtens <hauke@...ke-m.de> wrote:

> I have tried wireless-2.6 and I have the same problem. If the rate goes
> over 11M no TCP/IP traffic goes through the wireless connecting. If rate
> is set to auto and the rate control algorithm changes it to something
> less than 11M TCP/IP traffic goes through, but if it is more than 11M no
> TCP/IP traffic goes through the wireless link.

And this is a problem if the rate control algorithm often sets the rate to
more than 11M even if connection is unreliable at that rate. Does this
actually happen? Are you currently using 'pid'?

Also, it would be fine to have a dump of the PID events. In order to get
this, you need to:
- build a kernel with debugfs enabled;
- mount debugfs (mount -t debugfs foo /mnt/debug)

Then, before testing:
cat /mnt/debug/ieee80211/phy0/stations/*/rc_pid_events > events_dump

You can even make a graph out of that, with a python script which Mattias
posted on this list some time ago, but a dump would be just fine.


--
Ciao
Stefano
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/