From: Larry Finger <Larry.Finger@lwfinger.net>
To: Michael Buesch <mb@bu3sch.de>
Cc: John Linville <linville@tuxdriver.com>,
bcm43xx-dev@lists.berlios.de, linux-wireless@vger.kernel.org
Subject: Re: [PATCH] b43: Rewrite LO calibration algorithm
Date: Sun, 20 Apr 2008 13:56:53 -0500 [thread overview]
Message-ID: <480B91F5.3050700@lwfinger.net> (raw)
In-Reply-To: <200804201603.33400.mb@bu3sch.de>
Michael Buesch wrote:
> This patch distributes the Local Oscillator calibration bursts over time,
> so that calibration only happens when it's actually needed.
> Currently we periodically perform a recalibration of the whole table.
> The table is huge and this takes lots of time. Additionally only small bits
> of the table are actually needed at a given time. So instead of maintaining
> a huge table with all possible calibration values, we create dynamic calibration
> settings that
> a) We only calibrate when they are actually needed.
> b) Are cached for some time until they expire.
> So a recalibration might happen if we need a calibration setting that's not
> cached, or if the active calibration setting expires.
> Currently the expire timeout is set to 30 seconds. We may raise that in future.
>
> This patch reduces overall memory consumption by nuking the
> huge static calibration tables.
>
> This patch has been tested on several 4306, 4311 and 4318 flavours.
>
> Signed-off-by: Michael Buesch <mb@bu3sch.de>
ACKed-by: Larry Finger <Larry.Finger@lwfinger.net>
> ---
prev parent reply other threads:[~2008-04-20 18:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-20 14:03 [PATCH] b43: Rewrite LO calibration algorithm Michael Buesch
2008-04-20 18:56 ` Larry Finger [this message]
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