10G and socket alloc failure

[Andre Oppermann]

Jack Vogel wrote:
> While testing out the ixgbe driver we've observed this failure in the stack
> code, here is the info:
> 
> The test engineer is using iperf, typically with 16 threads. If the
> driver is using
> either legacy or MSI interrupts we will see broken pipes, in dmesg its
> due to sonewconn() failing in syncache_socket().
> 
> Whats interesting is that when I have multiple RX queues configured and
> using MSI/X this doesnt happen, at least not very often.
> 
> It does not seem to hurt performance horribly, iperf just spawns another
> thread, but I was wondering if there is some underlying tuneable I dont
> know about that would stop this from happening??
> 
> And any theory about why it doesnt happen with multiple queues?

Do you see any messages in syslog regarding syncache?

-- 
Andre