Re: ixg(4) performances

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Tue, Aug 26, 2014 at 12:17:28PM +0000, Emmanuel Dreyfus wrote:
> Hi
> 
> ixgb(4) has poor performances, even on latest -current. Here is the
> dmesg output:
> ixg1 at pci5 dev 0 function 1: Intel(R) PRO/10GbE PCI-Express Network Driver, 
> Version - 2.3.10
> ixg1: clearing prefetchable bit
> ixg1: interrupting at ioapic0 pin 9
> ixg1: PCI Express Bus: Speed 2.5Gb/s Width x8
> 
> The interface is configued with:
> ifconfig ixg1 mtu 9000 tso4 ip4csum tcp4csum-tx udp4csum-tx

MTU 9000 considered harmful.  Use something that fits in 8K with the headers.
It's a minor piece of the puzzle but nonetheless, it's a piece.

Thor