From: Jarek Poplawski <jarkao2@gmail.com>
To: jamal <hadi@cyberus.ca>
Cc: Alexander Duyck <alexander.duyck@gmail.com>,
David Miller <davem@davemloft.net>,
jeffrey.t.kirsher@intel.com, jeff@garzik.org,
netdev@vger.kernel.org, alexander.h.duyck@intel.com
Subject: Re: [PATCH 3/3] pkt_sched: restore multiqueue prio scheduler
Date: Sun, 24 Aug 2008 21:19:05 +0200 [thread overview]
Message-ID: <20080824191905.GA3372@ami.dom.local> (raw)
In-Reply-To: <1219585163.4698.43.camel@localhost>
On Sun, Aug 24, 2008 at 09:39:23AM -0400, jamal wrote:
...
> With current controls being per qdisc instead of per netdevice,
> the hol fear is unfounded.
> You send and when hw cant keep up, you block just the one hwqueue.
> While hwqueue is blocked, you can accumulate packets in the prio qdisc
> (hence my statement it may not be necessary to accumulate packets in
> driver).
Jamal, maybe I miss something, but this could be like this only with
default pfifo_fast qdiscs, which really are per dev hwqueue. Other
qdiscs, including prio, are per device, so with prio, if a band with
the highest priority is blocked it would be requeued blocking other
bands (hwqueues in Alexander's case).
Cheers,
Jarek P.
next prev parent reply other threads:[~2008-08-24 19:13 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-22 0:51 [PATCH 1/3] LRO: fix return code propogation Jeff Kirsher
2008-08-22 0:51 ` [PATCH 2/3] netlink: nal_parse_nested_compat was not parsing nested attributes Jeff Kirsher
2008-08-22 10:18 ` David Miller
2008-08-22 17:40 ` [PATCH 2/3] netlink: nla_parse_nested_compat " Duyck, Alexander H
2008-08-27 14:52 ` Thomas Graf
2008-08-27 18:09 ` Duyck, Alexander H
2008-08-22 0:51 ` [PATCH 3/3] pkt_sched: restore multiqueue prio scheduler Jeff Kirsher
2008-08-22 10:16 ` David Miller
2008-08-22 14:30 ` jamal
2008-08-22 22:19 ` Jarek Poplawski
2008-08-23 0:01 ` Alexander Duyck
2008-08-23 0:40 ` David Miller
2008-08-23 1:37 ` Alexander Duyck
2008-08-23 5:12 ` Herbert Xu
2008-08-23 6:35 ` Alexander Duyck
2008-08-23 7:07 ` Herbert Xu
2008-08-23 8:23 ` David Miller
2008-08-23 8:15 ` David Miller
2008-08-23 0:33 ` David Miller
2008-08-23 8:47 ` Jarek Poplawski
2008-08-23 16:31 ` Alexander Duyck
2008-08-23 16:49 ` jamal
2008-08-23 19:09 ` Alexander Duyck
2008-08-24 7:53 ` Jarek Poplawski
2008-08-24 13:39 ` jamal
2008-08-24 19:19 ` Jarek Poplawski [this message]
2008-08-24 19:27 ` Jarek Poplawski
2008-08-24 19:59 ` Jarek Poplawski
2008-08-24 20:18 ` Jarek Poplawski
2008-08-25 0:50 ` David Miller
2008-08-25 3:03 ` Alexander Duyck
2008-08-25 6:16 ` Jarek Poplawski
2008-08-25 9:36 ` Jarek Poplawski
2008-08-25 0:49 ` David Miller
2008-08-25 6:06 ` Jarek Poplawski
2008-08-25 7:48 ` David Miller
2008-08-25 7:57 ` Jarek Poplawski
2008-08-25 8:02 ` David Miller
2008-08-25 8:25 ` Jarek Poplawski
2008-08-25 8:35 ` Jarek Poplawski
2008-08-22 10:20 ` [PATCH 1/3] LRO: fix return code propogation David Miller
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