Performance problem using Intel X520-DA2

[Vlad Galu]

On Tue, Jan 24, 2012 at 11:27 AM, Marcin Markowski <mmarkowski at leon.pl> wrote:
> On 24.01.2012 00:34, Vlad Galu wrote:
>>
>> --
>> Good, fast and cheap: pick any two.
>>
>>
>> On Monday, January 23, 2012 at 8:20 PM, Marcin Markowski wrote:
>>
>>> Hello,
>>>
>>> We use FreeBSD as sniffer (libpcap programs) and we experience
>>> performance problems when incoming traffic is greater than 7.5Gbps/s.
>>> If we check 'top' we see that first irq from network card is using
>>> 100% CPU. I've tested this on FreeBSD 8.2-RELEASE and 9.0-RELEASE
>>> (on 9.0 we can see also kernel thread named {ix0 que} using 100% CPU),
>>> and both systems behave the same. In logs we see also:
>>> interrupt storm detected on "irq268:"; throttling interrupt source
>>>
>>> Our server platform is Intel SR2600URBRP, 2x Xeon X5650, 6GB RAM and
>>> NIC Intel X520-DA2.
>>>
>>> I'm not sure if problem is with NIC or motherboard in SR2600URBRP,
>>> because everything is fine when we use other server configuration:
>>> Intel SR1630GP, 1x Xeon X3450, 8GB RAM, NIC X520-DA2
>>>
>>> My /boot/loader.conf:
>>> kern.ipc.nmbclusters=262144
>>> hw.ixgbe.rxd=2048
>>> hw.ixgbe.txd=2048
>>> hw.ixgbe.num_queues=16
>>>
>>> /etc/sysctl.conf
>>> hw.intr_storm_threshold=10000
>>>
>>
>> Hi Marcin,
>>
>> Have a look at Luigi's excellent netmap framework [1].
>>
>> [1] http://info.iet.unipi.it/~luigi/netmap/
>
>
>  Hi Vlad,
>
>
> I tried to compile the kernel with NETMAP on FreeBSD 8 and 9, but I get
> warnings and
> the compilation ends.
>
> cc1: warnings being treated as errors
> ../../../dev/netmap/netmap.c: In function 'netmap_memory_init':
> ../../../dev/netmap/netmap.c:1557: warning: format '%d' expects type 'int',
> but argument 7 has type 'size_t'
> ../../../dev/netmap/netmap.c:1564: warning: format '%d' expects type 'int',
> but argument 7 has type 'size_t'
> ../../../dev/netmap/netmap.c: In function 'netmap_memory_fini':
> ../../../dev/netmap/netmap.c:1607: warning: format '%d' expects type 'int',
> but argument 2 has type 'size_t'
> ../../../dev/netmap/netmap.c: In function 'netmap_init':
> ../../../dev/netmap/netmap.c:1636: warning: format '%d' expects type 'int',
> but argument 2 has type 'size_t'
> *** Error code 1
>
> I'll try HEAD and see if it will be the same.
>

Hi Marcin,

Yes, I manually patched the sources. The format string should be %zd.

-- 
Good, fast & cheap. Pick any two.