From: David Miller <davem@davemloft.net>
To: jelaas@gmail.com
Cc: andrew@whydna.net, netdev@vger.kernel.org
Subject: Re: tx queue hashing hot-spots and poor performance (multiq, ixgbe)
Date: Thu, 30 Apr 2009 04:05:35 -0700 (PDT) [thread overview]
Message-ID: <20090430.040535.247823152.davem@davemloft.net> (raw)
In-Reply-To: <96ff3930904300351x60842bc1me0431c856f631773@mail.gmail.com>
From: Jens Låås <jelaas@gmail.com>
Date: Thu, 30 Apr 2009 12:51:16 +0200
> The main problem though was that the mapping is randomized. We wanted
> to set smp_affinity correctly for tx to match rx. That was actually
> the main reason for our local hacks.
It's NOT RANDOMIZED, READ THE CODE!
It takes the RX queue number and uses it to select the TX
queue.
That anything but random!
next prev parent reply other threads:[~2009-04-30 11:05 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-29 23:00 tx queue hashing hot-spots and poor performance (multiq, ixgbe) Andrew Dickinson
2009-04-30 9:07 ` Jens Låås
2009-04-30 9:24 ` David Miller
2009-04-30 10:51 ` Jens Låås
2009-04-30 11:05 ` David Miller [this message]
2009-04-30 14:04 ` Andrew Dickinson
2009-04-30 14:08 ` David Miller
2009-04-30 23:53 ` Andrew Dickinson
2009-05-01 4:19 ` Andrew Dickinson
2009-05-01 7:32 ` Eric Dumazet
2009-05-01 7:47 ` Eric Dumazet
2009-05-01 6:14 ` Eric Dumazet
2009-05-01 6:19 ` Andrew Dickinson
2009-05-01 6:40 ` Eric Dumazet
2009-05-01 7:23 ` Andrew Dickinson
2009-05-01 7:31 ` Eric Dumazet
2009-05-01 7:34 ` Andrew Dickinson
2009-05-01 21:37 ` Brandeburg, Jesse
2009-05-01 8:29 ` [PATCH] net: skb_tx_hash() improvements Eric Dumazet
2009-05-01 8:52 ` Eric Dumazet
2009-05-01 9:29 ` Eric Dumazet
2009-05-01 16:17 ` David Miller
2009-05-03 21:44 ` David Miller
2009-05-04 6:12 ` Eric Dumazet
2009-05-01 16:08 ` tx queue hashing hot-spots and poor performance (multiq, ixgbe) David Miller
2009-05-01 16:48 ` Eric Dumazet
2009-05-01 17:22 ` David Miller
2009-05-01 10:20 ` Jesper Dangaard Brouer
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