From: Simon Barber <simon@superduper.net>
To: bloat-devel@lists.bufferbloat.net
Subject: Re: Enabling Byte Queue Limits in the ath5k wireless driver
Date: Sat, 05 Oct 2013 20:39:59 -0700 [thread overview]
Message-ID: <5250DB8F.4060004@superduper.net> (raw)
In-Reply-To: <CAMdC6xak3DuBgfPuZe-idVx3gP2OruTjN7X9fsV_wfJtY6CbpQ@mail.gmail.com>
BQL does make sense, but TQL would be even better - 'Time Queue Limits'.
Which would work based on an estimate of how much time each packet will
take to send, and limiting the hardware queue to contain a total mount
of 'time'. The purpose of the hardware queue is to mask interrupt and
other latencies involved in refilling an empty queue - a time based
phenomenon. Hence time is the best metric to control it - with fixed
speed interfaced like ethernet bytes=time, but not so on wireless.
Simon
On 10/3/2013 11:49 AM, Anirudh Sivaraman wrote:
> Hi,
>
> I am looking into enabling BQL for the ath5k driver, and was wondering
> if anyone here knows of any prior efforts in this direction. In
> particular, is BQL even a sensible strategy for wireless drivers?
> Thank you in advance for any advice you may have in this regard.
>
> Anirudh
> _______________________________________________
> Bloat-devel mailing list
> Bloat-devel@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat-devel
next prev parent reply other threads:[~2013-10-06 3:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-03 18:49 Anirudh Sivaraman
2013-10-06 3:39 ` Simon Barber [this message]
2013-10-06 13:31 ` Anirudh Sivaraman
2013-10-06 15:01 ` Simon Barber
2013-10-06 16:36 ` Anirudh Sivaraman
2013-10-06 21:03 ` Simon Barber
2013-10-08 11:00 ` Anirudh Sivaraman
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