I have rxd and txd set to 1024.  How high can I safely go?

# add more descriptors to em devices.
hw.em.rxd=1024
hw.em.txd=1024

### other settings... I have tried rx_int_delay=0 and 32 ... doesn't seem to make the watchdogs go away.

dev.em.4.rx_int_delay: 32
dev.em.4.tx_int_delay: 66
dev.em.4.rx_abs_int_delay: 66
dev.em.4.tx_abs_int_delay: 66
dev.em.4.rx_processing_limit: 300



I am using a PCI-Express (x8) PCI-e slot according to the motherboard specs:
http://supermicro.com/products/motherboard/Xeon3000/3210/X7SBi.cfm

Rudy



Jack Vogel wrote:
Increase the size of your TX ring, meaning the number of TX descriptors.

You said this is a quad port card, what size PCI E slot are you in? On
some motherboards slot connectors might suggest its of a certain size
but its not really wired fully. If you are not in a x8 lane slot move it to
one.

What about system tuning?

Some ideas, let me know how it goes.

Jack


On Wed, Sep 30, 2009 at 3:28 PM, Rudy <cra...@monkeybrains.net> wrote:

Rudy wrote:

Rudy wrote:

I am having watchdog timeout issues

Oh, here is some more info from 'pciconf -lcv'.

I offloaded half the traffic from em0 to em5 and there has only been one
watchdog timeout today (on em5) vs. 10 watchdog timeouts yesterday.  We do
streaming out of our network and the 3 second outage really messes things
up...


e...@pci0:5:0:0: class=0x020000 card=0x10a48086 chip=0x10a48086 rev=0x06
hdr=0x00
   vendor     = 'Intel Corporation'
   device     = '82571EB Gigabit Ethernet Controller'
   class      = network
   subclass   = ethernet
   cap 01[c8] = powerspec 2  supports D0 D3  current D0
   cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
   cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x4(x4)
e...@pci0:5:0:1: class=0x020000 card=0x10a48086 chip=0x10a48086 rev=0x06
hdr=0x00
   vendor     = 'Intel Corporation'
   device     = '82571EB Gigabit Ethernet Controller'
   class      = network
   subclass   = ethernet
   cap 01[c8] = powerspec 2  supports D0 D3  current D0
   cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
   cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x4(x4)
e...@pci0:6:0:0: class=0x020000 card=0x10a48086 chip=0x10a48086 rev=0x06
hdr=0x00
   vendor     = 'Intel Corporation'
   device     = '82571EB Gigabit Ethernet Controller'
   class      = network
   subclass   = ethernet
   cap 01[c8] = powerspec 2  supports D0 D3  current D0
   cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
   cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x4(x4)
e...@pci0:6:0:1: class=0x020000 card=0x10a48086 chip=0x10a48086 rev=0x06
hdr=0x00
   vendor     = 'Intel Corporation'
   device     = '82571EB Gigabit Ethernet Controller'
   class      = network
   subclass   = ethernet
   cap 01[c8] = powerspec 2  supports D0 D3  current D0
   cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
   cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x4(x4)
e...@pci0:13:0:0:        class=0x020000 card=0x108c15d9 chip=0x108c8086
rev=0x03 hdr=0x00
   vendor     = 'Intel Corporation'
   device     = '82573E Intel Corporation 82573E Gigabit Ethernet
Controller (Copper)'
   class      = network
   subclass   = ethernet
   cap 01[c8] = powerspec 2  supports D0 D3  current D0
   cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
   cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x1(x1)
e...@pci0:15:0:0:        class=0x020000 card=0x109a15d9 chip=0x109a8086
rev=0x00 hdr=0x00
   vendor     = 'Intel Corporation'
   device     = '82573L Intel PRO/1000 PL Network Adaptor'
   class      = network
   subclass   = ethernet
   cap 01[c8] = powerspec 2  supports D0 D3  current D0
   cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
   cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x1(x1)
vgap...@pci0:17:3:0:    class=0x030000 card=0xd18015d9 chip=0x515e1002
rev=0x02

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