Eric Dumazet a écrit :

Christoph Lameter a écrit :

quoted

On Tue, 1 Sep 2009, Eric Dumazet wrote:

quoted

You should see that in /proc/interrupts, if I correctly understand bnx2.c

Hmmm I have 8 interrupts:

  62:        158          0          0          0          0          0
0          0          0          0          0          0          0
0          0          0  IR-PCI-MSI-edge      eth0-0
  63:         84          0          0          0          0          0
0          0          0          0          0          0          0
0          0          0  IR-PCI-MSI-edge      eth0-1
  64:        412          0          0          0          0          0
0          0          0          0          0          0          0
0          0          0  IR-PCI-MSI-edge      eth0-2
  65:         25          0          0          0          0          0
0          0          0          0          0          0          0
0          0          0  IR-PCI-MSI-edge      eth0-3
  66:      49718          0          0          0          0          0
0          0          0          0          0          0          0
0          0          0  IR-PCI-MSI-edge      eth0-4
  67:         65          0          0          0          0          0
0          0          0          0          0          0          0
0          0          0  IR-PCI-MSI-edge      eth0-5
  68:        686          0          0          0          0          0
0          0          0          0          0          0          0
0          0          0  IR-PCI-MSI-edge      eth0-6
  69:       2582          0          0          0          0          0
0          0          0          0          0          0          0
0          0          0  IR-PCI-MSI-edge      eth0-7

Yes, this confirm you have 8 queues on this NIC

Strange thing is they seem to be all serviced by CPU-0, which is not good...

Given that bnx2.c uses num_online_cpus() at init time, you could
as a workaround do the insmod/modprobe bnx2 with only one online cpu,
and you'll revert to a mono-queue NIC :)

int msix_vecs = min(cpus + 1, RX_MAX_RINGS); 
...
if ((bp->flags & BNX2_FLAG_MSIX_CAP) && !dis_msi && cpus > 1)
	bnx2_enable_msix(bp, msix_vecs);


For your multicast test anyway, only one queue should be used (one flow)