[Beowulf] Whats up with these newer Intel NICs?

Geoff geoff at galitz.org
Mon Sep 24 04:12:37 EDT 2007




Without tearing apart the source for the driver and gettings some NIC's  
for my own testing (feel free to send me a batch so I can run my own  
tests!) I would at least echo Doug here.  Drivers for a newer hardware  
might not be optimized, particularly concerning drivers whose source works  
across entire families of devices.

I presume you have searched the Internet for similar reports, or the  
documentation for OS device driver in question?  I might also check the  
system logs to see if driver is logging anything useful.

-geoff



Am 24.09.2007, 05:43 Uhr, schrieb Douglas Eadline <deadline at eadline.org>:

> Just a guess, but did you play with any of the driver
> parameters like ITR and Flow Control. Out of the box
> many of these are set to safe values.
>
> Plus, there seems to be no data on Intel's website for the
> 80003ES2LAN. Maybe it is so new the driver development
> is lagging (another guess)
>
>  --
>  Doug
>
>
>> Hi folks:
>>
>>    Working on trying to figure out why the Intel NICs on these
>> motherboards we are working with are slow.  Ok, slow is a relative term.
>>   More along the lines of "not as fast as they could be" specifically
>> relative to a PCI-x 1000/MT adapter we plugged in.
>>
>>    Scenario is trying to do some load testing.  I have 4 clients, all
>> with the same version of OS, pounding on our server (part of the load
>> test).  Gigabit, server does channel bonding.  Seeing good results.  But
>> .... on the nodes that use this beast:
>>
>> 04:00.0 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit
>> Ethernet Controller (Copper) (rev 01)
>>          Subsystem: Super Micro Computer Inc Unknown device 0000
>>          Flags: bus master, fast devsel, latency 0, IRQ 1274
>>          Memory at c8200000 (32-bit, non-prefetchable) [size=128K]
>>          I/O ports at 2000 [size=32]
>>          Capabilities: [c8] Power Management version 2
>>          Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+
>> Queue=0/0 Enable+
>>          Capabilities: [e0] Express Endpoint IRQ 0
>>          Capabilities: [100] Advanced Error Reporting
>>          Capabilities: [140] Device Serial Number  
>> f2-72-32-ff-ff-48-30-00
>>
>> we get ~70-75 MB/s, while plugging a nice little
>>
>> 05:02.0 Ethernet controller: Intel Corporation 82546GB Gigabit Ethernet
>> Controller (rev 01)
>>          Subsystem: Intel Corporation PRO/1000 MT Dual Port Server  
>> Adapter
>>          Flags: bus master, 66MHz, medium devsel, latency 52, IRQ 28
>>          Memory at c8340000 (64-bit, non-prefetchable) [size=128K]
>>          Memory at c8300000 (64-bit, non-prefetchable) [size=256K]
>>          I/O ports at 3000 [size=64]
>>          [virtual] Expansion ROM at c2000000 [disabled] [size=256K]
>>          Capabilities: [dc] Power Management version 2
>>          Capabilities: [e4] PCI-X non-bridge device
>>
>> into a PCI-x slot gives us 92-98 MB/s for our load test (IOzone).  It
>> gives more than that, I am optically averaging.
>>
>> Ok.  So the mystery is *why*.
>>
>> First I note that the first unit, which is a motherboard NIC, has
>> "32-bit memory" at a particular address, while the second unit, the
>> 1000/MT card in the PCI-x slot has "64-bit memory" at a different  
>> address.
>>
>> Second, and this is counter intuitive, but the motherboard gigabit unit
>> is on PCI-e (x4 at that!)
>>
>>> [  115.246121] PCI: Setting latency timer of device 0000:04:00.0 to 64
>>> [  115.261547] e1000: 0000:04:00.0: e1000_probe: (PCI
>>> Express:2.5Gb/s:Width x4) 00:30:48:32:72:f2
>>> [  115.290791] PM: Adding info for No Bus:eth0
>>> [  115.290843] e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network
>>> Connection
>>> [  115.290868] ACPI: PCI Interrupt 0000:04:00.1[B] -> GSI 19 (level,
>>> low) -> IRQ 19
>>> [  115.290882] PCI: Setting latency timer of device 0000:04:00.1 to 64
>>> [  115.306461] e1000: 0000:04:00.1: e1000_probe: (PCI
>>> Express:2.5Gb/s:Width x4) 00:30:48:32:72:f3
>>> [  115.342947] PM: Adding info for No Bus:eth1
>>> [  115.342983] e1000: eth1: e1000_probe: Intel(R) PRO/1000 Network
>>> Connection
>>
>> while the PCI-x is on, well, PCI-x.  And it should be slower.
>>
>>> [  115.608773] e1000: 0000:05:02.0: e1000_probe: (PCI:33MHz:64-bit)
>>> 00:04:23:9e:36:ca
>>> [  115.636072] PM: Adding info for No Bus:eth2
>>> [  115.636105] e1000: eth2: e1000_probe: Intel(R) PRO/1000 Network
>>> Connection
>>> [  115.636129] ACPI: PCI Interrupt 0000:05:02.1[B] -> GSI 29 (level,
>>> low) -> IRQ 29
>>> [  115.902030] e1000: 0000:05:02.1: e1000_probe: (PCI:33MHz:64-bit)
>>> 00:04:23:9e:36:cb
>>> [  115.928619] PM: Adding info for No Bus:eth3
>>> [  115.928648] e1000: eth3: e1000_probe: Intel(R) PRO/1000 Network
>>> Connection
>>> [  115.928687] ACPI: PCI Interrupt 0000:06:00.0[A] -> GSI 24 (level,
>>> low) -> IRQ 24
>>
>> The driver is 7.3.20-k2-NAPI
>>
>>> [  110.772712] Intel(R) PRO/1000 Network Driver - version  
>>> 7.3.20-k2-NAPI
>>> [  110.772717] Copyright (c) 1999-2006 Intel Corporation.
>>
>> I know 7.6.5 is out, and I installed it on one of the machines, without
>> any impact.
>>
>> Motherboard is a Supermicro X7DVA-i I think.  I am also seeing this on a
>> different Supermicro motherboard with dual cores.  Same  
>> issue/performance.
>>
>> Any thoughts?
>>
>> --
>>
>> Joseph Landman, Ph.D
>> Founder and CEO
>> Scalable Informatics LLC,
>> email: landman at scalableinformatics.com
>> web  : http://www.scalableinformatics.com
>>         http://jackrabbit.scalableinformatics.com
>> phone: +1 734 786 8423
>> fax  : +1 866 888 3112
>> cell : +1 734 612 4615
>>
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>> 
>>
>
>
> --
> Doug
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-- 
-------------------------------
Geoff Galitz, geoff at galitz.org
Blankenheim, Deutschland

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