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William_J_1
Beginner
128 Views

VTune causes unknown NMIs and sometimes seg faults

We're running VTune on a 256 core SGI Linux machine.

 

In the syslog, we get the following messages when I start VTune:

 

Kernel : vtss_cmd_start[cpu98]: starting vtss++ collection

Kernel:  vtss_cmd_start[cpu98]: starting vtss++ collection continue 1

Kernel: vtss_cmd_start[cpu96]: starting vtss++ collection continue 10

…then all the errors spew out….

Kernel: uhhuh. NMI received for unknown reason 00 on CPU 74

Kernel: do you have a strange power saving mode enabled?

Kernel: dazed and confused, but trying to continue

..

Same messages spew out for multiple cpus, 74, 32, 35, 107, 226, 43, 227, 105, 70

Mostly 32-35 range

….

…ends with these messages when vtune is stopped:

 

Kernel: vtss_procfs_ctrl_write[cpu96]: STOP

Kernel:vtss_task_map_fini[cpu185] : item is busy now, key=72780, usage=1

Kernel: vtss_transport_fini[cpu185]: ‘72773-72780.1’ lost 36 events

Kernel: vtss_transport_fini[cpu185]: ‘72872-72894.1’ lost 419 events

 

…more of the same lines above with different numbers of events lost….

 

Kernel: vtss_collection_fini[cpu185]: vtss++ collection stopped

 

At first we thought that somehow VTune was highlighting a hardware problem but the SGI folks feel that this is an Intel VTune problem.

 

We also will sometimes get a seg fault but I've neglected to catch the output. 

 

Any suggestions on what to try next?

 

Thanks.

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6 Replies
Bernard
Black Belt
128 Views

>>>We also will sometimes get a seg fault but I've neglected to catch the output.>>>

Next time when segfault will occur please post the output.

David_A_Intel1
Employee
128 Views

Hi William:

Have you submitted an issue at Intel® Premier Support?  I'm sorry, but this issue really is too complicated to try to troubleshoot in the forum. :(

William_J_1
Beginner
128 Views

MrAnderson,

This last Monday I registered for Premier Support. I received an email stating that there is a 1 hour delay while my account is being "verified". I've continued to check and my account is still incomplete. There's a "Want more help? Contact support." link but it doesn't provide any actual contact information.

Can you suggest a link or email or telephone number that I can use to move this Premier Support process forward?

 

Thanks,

Michael

David_A_Intel1
Employee
128 Views

Hi Michael:

I'm really sorry about that.  Stupid computers. ;)

Did you use the same email address as you are using on the forum?  If not, please PM me with that info and I will look into what is going on at IPS.

William_J_1
Beginner
128 Views

MrAnderson,

Thank you for whatever you did. I was able to successfully log the issue with Premium Support.

 

Cheers,

Michael

David_A_Intel1
Employee
128 Views

Great!  Well, I had some help. ;)  But, I'm glad it is working and you got your issue submitted.

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