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From: Ben Hutchings <bhutchings@solarflare.com>
To: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: <netdev@vger.kernel.org>, <davem@davemloft.net>,
	<jeffrey.t.kirsher@intel.com>, <edumazet@google.com>,
	<therbert@google.com>, <alexander.duyck@gmail.com>
Subject: Re: [RFC PATCH 09/10] ixgbe: Add support for displaying the number of Tx/Rx channels
Date: Wed, 11 Jul 2012 19:21:43 +0100	[thread overview]
Message-ID: <1342030903.2613.52.camel@bwh-desktop.uk.solarflarecom.com> (raw)
In-Reply-To: <20120630001659.29939.61276.stgit@gitlad.jf.intel.com>

On Fri, 2012-06-29 at 17:16 -0700, Alexander Duyck wrote:
> This patch adds support for the ethtool get_channels operation.
> 
> Since the ixgbe driver has to support DCB as well as the other modes the
> assumption I made here is that the number of channels in DCB modes refers
> to the number of queues per traffic class, not the number of queues total.
[...]

When MSI-X is enabled, a 'channel' is an MSI-X vector and the associated
queues, i.e. total number of channels reported should be the total
number of MSI-X vectors in use.  (That was my intended interpretation,
anyway.  It may be that there is too much variation in the way queues
and interrupts are associated for these operations to be defined in a
general way.)

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

  reply	other threads:[~2012-07-11 18:21 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-30  0:16 [RFC PATCH 00/10] Make XPS usable within ixgbe Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 01/10] net: Split core bits of dev_pick_tx into __dev_pick_tx Alexander Duyck
2012-07-07  0:03   ` Ben Hutchings
     [not found]     ` <CAL1qit_mpmVYQ3D4HQsii5LJ+Nu5=ftFWAWVnfPiDbmW5eWa0Q@mail.gmail.com>
2012-08-02 15:45       ` Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 02/10] net: Add functions netif_reset_xps_queue and netif_set_xps_queue Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 03/10] net: Rewrite netif_reset_xps_queue to allow for better code reuse Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 04/10] net: Rewrite netif_set_xps_queues to address several issues Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 05/10] net: Add support for XPS without SYSFS being defined Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 06/10] ixgbe: Define FCoE and Flow director limits much sooner to allow for changes Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 07/10] ixgbe: Add function for setting XPS queue mapping Alexander Duyck
2012-07-11 18:15   ` Ben Hutchings
2012-07-11 21:12     ` Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 08/10] ixgbe: Update ixgbe driver to use __dev_pick_tx in ixgbe_select_queue Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 09/10] ixgbe: Add support for displaying the number of Tx/Rx channels Alexander Duyck
2012-07-11 18:21   ` Ben Hutchings [this message]
2012-07-11 21:00     ` Alexander Duyck
2012-06-30  0:17 ` [RFC PATCH 10/10] ixgbe: Add support for set_channels ethtool operation Alexander Duyck
2012-07-03 22:30 ` [RFC PATCH 00/10] Make XPS usable within ixgbe Tom Herbert
2012-07-03 22:41   ` John Fastabend

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