I downloaded the igb-2.1.1 driver from Intel's web site and tried
to install it in my 2.6.31 Vyatta box.
The Vyatta distribution was previously using a 1.3.16-k2 igb driver,
and by default set up 4 RX and 4 TX queues when loaded. We have a
single-package CPU with four cores, so this is what we want to see -
four IRQs for transmit, and four for receive.
But with the 2.1.1 igb driver, I initially saw only one queue for both RX
and TX. I set the QueuePairs option to zero, and now I had one RX and
one TX queue, but still only one pair. Then I made sure IntMode was set
to 2, but still no joy:
[ 1.865054] igb 0000:01:00.1: PCI INT B -> GSI 17 (level, low) -> IRQ 17
[ 1.865069] igb 0000:01:00.1: setting latency timer to 64
[ 1.865262] igb: 0000:01:00.1: igb_validate_option: Interrupt Mode set to 2
[ 1.865264] igb: 0000:01:00.1: igb_validate_option: QueuePairs - TX/RX queue
pairs for interrupt handling Disabled
[ 1.865294] igb 0000:01:00.1: irq 43 for MSI/MSI-X
[ 1.865296] igb 0000:01:00.1: irq 44 for MSI/MSI-X
[ 1.865298] igb 0000:01:00.1: irq 45 for MSI/MSI-X
[ 1.865307] igb 0000:01:00.1: 0 vfs allocated
[ 2.048702] igb 0000:01:00.1: Intel(R) Gigabit Ethernet Network Connection
[ 2.048704] igb 0000:01:00.1: eth3: (PCIe:2.5Gb/s:Width x4)00:1b:21:45:be:19
[ 2.048707] igb 0000:01:00.1: Using MSI-X interrupts. 1 rx queue(s), 1 tx
queue(s)
So for some reason the igb-2.1.1 driver upon startup thinks it can only
use one queue, while the same kernel with the older driver sets up four
queues. Any idea what's going on?
Thanks,
-- Ed
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