4.3.15 creation date is a little misleading. The readme text on source forge
mentions that it is a “update to the ixgbe 4.3.x” which isn’t the clearest way
of saying it just contains a single patch back port to the older 4.3.x branch
which originally came out late last year.
Still glad to hear it worked for you. :)
-Don Skidmore <donald.c.skidm...@intel.com>
From: Derek Ditch [mailto:de...@criticalstack.com]
Sent: Wednesday, June 22, 2016 12:23 PM
To: Fujinaka, Todd <todd.fujin...@intel.com>
Cc: Skidmore, Donald C <donald.c.skidm...@intel.com>;
e1000-devel@lists.sourceforge.net
Subject: Re: [E1000-devel] Support for Symmetric RSS Hashing?
It seems the ixgbe 4.4.6 driver fixed this issue. Since the 4.3.15 was released
in March, I didn’t expect that was the issue.
Thanks!
—
Derek Ditch
de...@criticalstack.com<mailto:de...@criticalstack.com>
GPG: 0x2543A3B5
On 22Jun 2016, at 13:59, Derek Ditch
<de...@criticalstack.com<mailto:de...@criticalstack.com>> wrote:
So I have two VM’s that are slightly different. In one, that actually works.
Both SR-IOV PF on the same physical card (it has two ports). Here’s the
versions:
# working
kernel: 4.6.2-1.el7.custom.x86_64
ethtool version 4.2
$ ethtool -i eth1
driver: ixgbe
version: 4.4.6
firmware-version: 0x80000811, 1.1067.0
expansion-rom-version:
bus-info: 0000:00:05.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes
# not working
kernel: 4.6.2-1.el7.elrepo.x86_64
ethtool version 4.5
$ ethtool -i eth1
driver: ixgbe
version: 4.3.15
firmware-version: 0x80000811, 1.1067.0
expansion-rom-version:
bus-info: 0000:00:05.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no
I’ll try to upgrade the driver version on the one not working, but 4.3.15 is
_fairly_ new, I thought.
—
Derek Ditch
de...@criticalstack.com<mailto:de...@criticalstack.com>
GPG: 0x2543A3B5
On 21Jun 2016, at 14:16, Fujinaka, Todd
<todd.fujin...@intel.com<mailto:todd.fujin...@intel.com>> wrote:
That could be a kernel limitation. What kernel are you running?
Todd Fujinaka
Software Application Engineer
Networking Division (ND)
Intel Corporation
todd.fujin...@intel.com<mailto:todd.fujin...@intel.com>
(503) 712-4565
-----Original Message-----
From: Derek Ditch [mailto:de...@criticalstack.com]
Sent: Tuesday, June 21, 2016 10:57 AM
To: Skidmore, Donald C
<donald.c.skidm...@intel.com<mailto:donald.c.skidm...@intel.com>>
Cc: e1000-devel@lists.sourceforge.net<mailto:e1000-devel@lists.sourceforge.net>
Subject: Re: [E1000-devel] Support for Symmetric RSS Hashing?
Don,
Thanks for the suggestion. I hadn’t noticed the “hkey” argument to ethtool -X
before. However, it appears my hardware doesn’t support it (though I could be
doing it wrong).
sudo ethtool -X ens5 hkey
6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A
Cannot get RX flow hash indir size and key size: Operation not supported
$ sudo lspci -nn -s 05 -v
00:05.0 Ethernet controller [0200]: Intel(R) 82599 10 Gigabit Dual Port Network
Connection [8086:10fb] (rev 01)
Subsystem: Hewlett-Packard Company HP Ethernet 10Gb 2-port 560SFP+
Adapter [103c:17d3]
Physical Slot: 5
Flags: bus master, fast devsel, latency 0, IRQ 10
Memory at fea00000 (32-bit, non-prefetchable) [size=1M]
I/O ports at c080 [size=32]
Memory at febd0000 (32-bit, non-prefetchable) [size=16K]
Expansion ROM at feb00000 [disabled] [size=512K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
Capabilities: [70] MSI-X: Enable+ Count=64 Masked-
Capabilities: [a0] Express Endpoint, MSI 00
Capabilities: [e0] Vital Product Data
Kernel driver in use: ixgbe
This NIC is passed through as a physical function via SR-IOV, but it doesn’t
seem to work on the host either.
—
Derek Ditch
de...@criticalstack.com<mailto:de...@criticalstack.com>
GPG: 0x2543A3B5
On 20Jun 2016, at 11:50, Skidmore, Donald C
<donald.c.skidm...@intel.com<mailto:donald.c.skidm...@intel.com>> wrote:
Hey Derek,
Why can't you just change the RSS hash key to whatevery you want it to be via
ethtool -X?
Thanks,
-Don Skidmore <donald.c.skidm...@intel.com<mailto:donald.c.skidm...@intel.com>>
-----Original Message-----
From: Derek Ditch [mailto:de...@criticalstack.com]
Sent: Sunday, June 19, 2016 9:20 PM
To: e1000-devel@lists.sourceforge.net<mailto:e1000-devel@lists.sourceforge.net>
Subject: [E1000-devel] Support for Symmetric RSS Hashing?
I’ve been using and recommending Intel NICs for years for network
sensor platforms. I’m a huge user of Bro (http://bro.org
<http://bro.org/>) and also leveraged Suricata for signature-based
detections. Lately, I’ve started working with trying to get away from
PF_RING as my hardware interface layer due to additional
complications of out-of-kernel bolt-ons. I’ve really enjoyed the
performance achieved using AF_PACKET for applications that support
it. In Bro (and Suricata and now netsniff-ng), in order to support
FANOUT_HASH mode provided by the kernel, the packets are spread across multiple
processes. The problem is that these applications need symmetric hashing of the
connections.
The current ixgbe driver does not provide this guarantee in its RSS hashing.
Recent changes in the kernel further made this a problem by accepting
the hardware calculated hash, when available (for performance
reasons, this would be great, unless you needed symmetric hashing).
I ran across several discussions where an ixgbe driver was patched to
support this, and also ran across this blog post [1] that used DPDK
to override the driver hash. Can we just update the hash key in the
mainline driver so that we get both good distribution of connections
and symmetric hashing? It basically comes down to swapping out the
hash key to ensure the first 32-bits (src ip) match the second
32-bits (dst ip) and the next 16-bits (src port) match the following
16-bits (dst port). A published paper provides a key change that
modifies the standard Toeplitz hash function, which does not provide these
guarantees.
So… Can we just have a better hash function in hardware (via the
driver) that feeds RSS (and now AF_PACKET)?
Thanks!
[1] http://galsagie.github.io/2015/02/26/dpdk-tips-1/
<http://galsagie.github.io/2015/02/26/dpdk-tips-1/>
—
Derek Ditch
de...@criticalstack.com<mailto:de...@criticalstack.com>
GPG: 0x2543A3B5
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