From: Kalle Valo <kalle.valo@nokia.com>
To: Sam Leffler <sam@errno.com>
Cc: Tomas Winkler <tomasw@gmail.com>,
Johannes Berg <johannes@sipsolutions.net>,
linux-wireless@vger.kernel.org,
Ron Rindjunsky <ron.rindjunsky@intel.com>
Subject: Re: cfg80211 API changes
Date: Mon, 04 Feb 2008 20:20:22 +0200 [thread overview]
Message-ID: <87zlug4m8p.fsf@nokia.com> (raw)
In-Reply-To: <47A74923.8040201@errno.com> (ext Sam Leffler's message of "Mon\, 04 Feb 2008 09\:19\:31 -0800")
Sam Leffler <sam@errno.com> writes:
>>> I see. Rate scale algorithm only tels FW from what rate to start
>>> transmission. FW is responsible to do downscaling. Which is quite
>>> reasonable as retransmission is real time process. Instead of
>>> retransmitting on the same rate FW downscales. T X response provides
>>> to the rate scaling algorithm the successful rate.
>>
>> I just want to point out this is an important feature when the bus is
>> very slow, for example SPI bus in embedded devices. Retransfering
>> frames through SPI for every rate restransmit would make such a device
>> extremely slow.
>
> I don't know of a part that does repeated DMA to implement retransmit;
> do you have an example?
Asking me? No, I have never heard of such a device.
--
Kalle Valo
next prev parent reply other threads:[~2008-02-04 19:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1ba2fa240802030539h132c7365g1bc1c20b1c560c0@mail.gmail.com>
2008-02-03 13:55 ` cfg80211 API changes Tomas Winkler
2008-02-03 14:37 ` Johannes Berg
2008-02-03 14:51 ` Tomas Winkler
2008-02-04 5:52 ` Kalle Valo
2008-02-04 17:19 ` Sam Leffler
2008-02-04 18:20 ` Kalle Valo [this message]
2008-02-04 20:01 ` Tomas Winkler
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