Re: [hwloc-users] [Bug] Topology incorrect when CPU 0 offline

[Brice Goglin]

Hello
I am not sure we ever tested this because offlining cpu0 was impossible in 
Linux until recently. I knew things would change because arm kernel devs were 
modifying Linux to allow it. Looks like it matters to x86 too, now. I'll take a 
look.
Brice


Le 5 février 2021 20:43:33 GMT+01:00, "Clay, Garrett"  
a écrit :
>Hello,
>
>Has anyone experienced invalid topology creation from hwloc when CPU 0
>is offline (disabled)? Details of the issue here:
>https://github.com/open-mpi/hwloc/issues/450
>
>In short, seems hwloc does not handle CPU 0 being offline properly and
>mixes up L3 cache in the topology hierarchy. In contrast, CPU 1 offline
>creates a topology as expected. Seems like it could be a simple edge
>case bug.
>
>Thanks,
>Garrett
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[hwloc-users] [Bug] Topology incorrect when CPU 0 offline

[Clay, Garrett]

Hello,

Has anyone experienced invalid topology creation from hwloc when CPU 0 is 
offline (disabled)? Details of the issue here: 
https://github.com/open-mpi/hwloc/issues/450

In short, seems hwloc does not handle CPU 0 being offline properly and mixes up 
L3 cache in the topology hierarchy. In contrast, CPU 1 offline creates a 
topology as expected. Seems like it could be a simple edge case bug.

Thanks,
Garrett
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