Re: 10G and socket alloc failure

On 7/19/07, Andre Oppermann <andre@xxxxxxxxxxx> wrote:
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?

Yes, the messages are what are emitted in the code i cited above,
I could get the dmesg output if that would provide any more help.
I figured the point at which it is failing is pretty specific and someone
might know just from that what it was :)

Jack
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