From: Johannes Berg <johannes@sipsolutions.net>
To: Felix Fietkau <nbd@openwrt.org>
Cc: "Björn Smedman" <bjorn.smedman@venatech.se>,
"Pavel Roskin" <proski@gnu.org>,
linux-wireless <linux-wireless@vger.kernel.org>,
"Luis R. Rodriguez" <lrodriguez@atheros.com>,
"John W. Linville" <linville@tuxdriver.com>
Subject: Re: [PATCH] ath9k: fix TSF after reset on AR913x
Date: Thu, 01 Jul 2010 08:39:56 +0200 [thread overview]
Message-ID: <1277966396.3788.0.camel@jlt3.sipsolutions.net> (raw)
In-Reply-To: <4C2BE5A8.9030003@openwrt.org>
On Thu, 2010-07-01 at 02:47 +0200, Felix Fietkau wrote:
> No, the TSF value at this point is not accurate. It differs
> semi-randomly by a few orders of magnitude from the time measured by the
> CPU timer. The value I put in above is just an approximation, but since
> making it completely accurate is impossible, I figured this is good
> enough, especially since the value will most likely not deviate much
> from what I've measured here.
Are you sure it doesn't depend on CPU speed as well since the driver is
involved here? Or DMA speed?
johannes
next prev parent reply other threads:[~2010-07-01 6:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-30 0:07 [PATCH] ath9k: fix TSF after reset on AR913x Felix Fietkau
2010-06-30 22:02 ` Pavel Roskin
2010-06-30 22:38 ` Björn Smedman
2010-07-01 0:47 ` Felix Fietkau
2010-07-01 6:39 ` Johannes Berg [this message]
2010-07-01 7:51 ` Felix Fietkau
2010-07-01 0:45 ` Felix Fietkau
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