From: Adrian Chadd <adrian@freebsd.org>
To: jpo <pommnitz@yahoo.com>
Cc: linux-wireless@vger.kernel.org
Subject: Re: Performance regression between Madwifi/net80211 and ath5k/mac80211
Date: Wed, 22 Jun 2011 10:17:05 +0800 [thread overview]
Message-ID: <BANLkTik0umam7S+E1oog0LTEErMz-dZamg@mail.gmail.com> (raw)
In-Reply-To: <loom.20110621T215346-191@post.gmane.org>
Have you eliminated the kernel version as being the problem?
Adrian
On 22 June 2011 04:09, jpo <pommnitz@yahoo.com> wrote:
> Hello all,
> there seems to be a significant performance loss when moving from Madwifi
> to ath5k. For an embedded project we have been using Madwifi with Linux kernel
> 2.6.23. We have tested ath5k for some time and by now it seems to be stable
> enough for production use. Unfortunately it doesn't match Madwifi's performance.
> Running iperf (both, UDP and TCP) between two machines equipped with an AR5413
> with the Fedora 15 kernel and the stock Fedora 15 wireless subsystem shows a
> performance loss of about 10% relative to 2.6.23 and Madwifi-0.9.4.
> The tests where done under close to ideal lab conditions (cards connected with
> an antenna cable) running an IBSS network on channel 40 (5200MHz).
>
> Can anybody confirm this observation?
> Is there an explanation?
> Are there some tuning knobs I could try to improve the performance with
> mac80211/ath5k?
> Is the problem outside the wireless subsystem (Maybe it's the TCP/IP stack or
> something Fedora specific)?
>
> Thanks in advance.
> Joerg
>
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next prev parent reply other threads:[~2011-06-22 2:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-21 20:09 Performance regression between Madwifi/net80211 and ath5k/mac80211 jpo
2011-06-22 2:17 ` Adrian Chadd [this message]
2011-06-22 13:41 ` Joerg Pommnitz
2011-06-22 13:46 ` Johannes Berg
2011-06-22 14:41 ` Joerg Pommnitz
2011-06-22 14:50 ` Johannes Berg
2011-06-22 15:02 ` AW: " Joerg Pommnitz
2011-06-22 15:07 ` Joerg Pommnitz
2011-06-22 18:52 ` Luis R. Rodriguez
2011-06-26 14:45 ` [ath5k-devel] " Felix Fietkau
2011-06-27 10:26 ` Joerg Pommnitz
2011-06-30 11:02 ` Bob Copeland
2011-10-19 10:06 ` Joerg Pommnitz
2011-10-19 11:33 ` Adrian Chadd
2011-10-19 15:55 ` Pavel Roskin
2011-10-19 18:27 ` Sam Leffler
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