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Date:      Wed, 16 Jul 2014 00:47:50 +0000
From:      "Pieper, Jeffrey E" <jeffrey.e.pieper@intel.com>
To:        Ryan Stone <rysto32@gmail.com>, Adrian Chadd <adrian@freebsd.org>
Cc:        FreeBSD Net <freebsd-net@freebsd.org>, "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org>
Subject:   RE: ixgbe and igb - how many queues?
Message-ID:  <2A35EA60C3C77D438915767F458D65687E8FC755@ORSMSX111.amr.corp.intel.com>
In-Reply-To: <CAFMmRNy32Je8fQOSwNpXhkSOfwT=D9bFDPPk526wLHFGxxFsAQ@mail.gmail.com>
References:  <CAJ-Vmo=HT3p-DZHcZ%2BQocZb8gdNgkrpB4mXgLqmr6a%2B-xELUDQ@mail.gmail.com> <CAFMmRNy32Je8fQOSwNpXhkSOfwT=D9bFDPPk526wLHFGxxFsAQ@mail.gmail.com>

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82598, 82599, X520, and X540 can have up to 64 Tx/Rx queues (1 per CPU), bu=
t are limited to 16 RSS queues.=20
For igb it varies, depending on HW. I can put together a list.

Jeff

-----Original Message-----
From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-net@freebsd.org] =
On Behalf Of Ryan Stone
Sent: Tuesday, July 15, 2014 5:04 PM
To: Adrian Chadd
Cc: FreeBSD Net; freebsd-arch@freebsd.org
Subject: Re: ixgbe and igb - how many queues?

The oldest hardware supported by the ixgbe driver is the 82598, which
supports up to 16 RSS queues (see Table 3-48 in the 82598 datasheet).
I believe that the 82599 and X520 are more capable.

I have no idea what the situation is on igb, as there seems to be a
lot more hardware supported by that driver and I don't work with the
1GB devices very much.
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