[openib-general] Performance Degradation with OFED v. Voltaire

[Philippe Bernadat]

Roland,

Attached are the two lspci outputs.

The only differences I see are:

[philippe at hamish o2ib]$ diff lspci.vib lspci.ofed
1d0
< pcilib: Resource 5 in /sys/bus/pci/devices/0000:00:1f.1/resource has a 
64-bit address, ignoring
40c39
< 50: 03 60 ff 7f 11 11 00 00 00 00 00 00 00 00 00 00
---
 > 50: 03 60 ff ff 11 11 00 00 00 00 00 00 00 00 00 00
[philippe at hamish o2ib]$


 >  >   Roland may be able to comment on if their are performance 
difference
 >  > for interrupt-drive CQ between the old VAPI stacks and OFED.
 >
 > I think OFED is probably faster than any other stack I know of...
 >
 > I think MST's idea of PCI tuning issues is probably right.  Can you
 > send the output of
 >
 >    lspci -vxxx -d15b3:
 >
 > with the two stacks?
 >
 >  - R.
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