Matheos Worku wrote:

All,

While running iperf (transmit) on NIU driver I get several soft lockup 
errors.  I have seen similar soft lockup errors on kernels 2.6.18 and 
later (with other 10G NIC drivers with LSO disabled) but it is more 
frequent/pronounced on 2.6.24 kernel.  oprofile is not giving  much clue 
as where the cpus are spending time (atleast doesn't indicate any thing 
abnormal in the driver(s)). 

Is oprofile running on an AMD processor able to profile where/when 
interrupts are disabled?  If not there could be a fair bit missing from 
the profile.

rick jones