HEADS-UP: IFLIB implementations of sys/dev/e1000 em, lem, igb pending

[Olivier Cochard-Labbé]

On Wed, Jan 11, 2017 at 4:17 PM, Sean Bruno <sbruno at freebsd.org> wrote:

>
>
> Olivier:
>
> Give this a quick try.  This isn't the correct way to do this, but I
> want to see if I'm on the right path:
>

​thanks, it fix the problem, I've got back the 4 queues:​

​igb2: <Intel(R) PRO/1000 PCI-Express Network Driver> port 0x3000-0x301f
mem 0xdfea0000-0xdfebffff,0xdff24000-0xdff27fff irq 18 at device 20.0 on
pci0
igb2: attach_pre capping queues at 8
igb2: using 1024 tx descriptors and 1024 rx descriptors
igb2: msix_init qsets capped at 8
igb2: pxm cpus: 4 queue msgs: 9 admincnt: 1
igb2: using 4 rx queues 4 tx queues
igb2: Using MSIX interrupts with 5 vectors
igb2: allocated for 4 tx_queues
igb2: allocated for 4 rx_queues
igb2: Ethernet address: 00:08:a2:09:33:da
igb2: netmap queues/slots: TX 4/1024, RX 4/1024
​
In forwarding mode, I measure about 10% performance drop with this new
drivers on this hardware:

x head r311848: packets per second
+ head r311849 and BAR patch: packets per second
+--------------------------------------------------------------------------+
|++    ++ +                                                   xxx     x   x|
|                                                            |__M__A____|  |
| |___AM__|                                                                |
+--------------------------------------------------------------------------+
    N           Min           Max        Median           Avg        Stddev
x   5        924170        943071        927509      931612.1     8096.8269
+   5        831452      845929.5        840940      838730.5     6413.5602
Difference at 95.0% confidence
        -92881.6 +/- 10652.2
        -9.96999% +/- 1.07481%
        (Student's t, pooled s = 7303.85)

Regards,

Olivier