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From: Bob Copeland <me@bobcopeland.com>
To: Ben Greear <greearb@candelatech.com>
Cc: Arend van Spriel <arend@broadcom.com>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: mac80211-hwsim and tx-rates.
Date: Sat, 14 Mar 2015 13:48:13 -0400	[thread overview]
Message-ID: <20150314174813.GA6772@localhost> (raw)
In-Reply-To: <55045E56.1050904@candelatech.com>

On Sat, Mar 14, 2015 at 09:14:14AM -0700, Ben Greear wrote:
> It can change with every packet based on rate-control logic, right?

You said you wanted to go from index to bitrate -- the index changes,
but not the rate<->index mapping.

> And, it seems unlikely to me that an extra 16 bytes or so would make a
> great deal of difference.  Using hash tables instead of linear walks
> and other things would likely improve performance more?

Last time I tested with perf, memcpy dominated everything -- I've been
thinking about having a mode where just headers are sent to userspace
to avoid some of that.

-- 
Bob Copeland %% http://bobcopeland.com/

  reply	other threads:[~2015-03-14 17:48 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-11 21:07 mac80211-hwsim and tx-rates Ben Greear
2015-03-11 21:31 ` Arend van Spriel
2015-03-11 22:06   ` Ben Greear
2015-03-14 10:47     ` Bob Copeland
2015-03-14 16:14       ` Ben Greear
2015-03-14 17:48         ` Bob Copeland [this message]
2015-03-14 18:04           ` Ben Greear

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