Withdrawn: CODETOOLS-7902909: jcstress: Sysfs topology parser should accept duplicate core IDs in different packages

[Aleksey Shipilev]

On Thu, 29 Apr 2021 09:36:23 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> There is an example on one of the hosts, where jcstress detects the topology as:
> 
> 
> Detecting CPU topology and computing scheduling classes:
>    Linux, using /sys/devices/system/cpu
>    2 packages, 1 core per package, 2 threads per core
> 
>    CPU lists:
>      Package #0, Core #0, Threads: 0, 1
>      Package #1, Core #0, Threads: 0, 1
> 
> 
> ...whereas the real topology is:
> 
> 
> # lscpu
> Architecture: x86_64
> CPU op-mode(s): 32-bit, 64-bit
> Byte Order: Little Endian
> CPU(s): 2
> On-line CPU(s) list: 0,1
> Thread(s) per core: 1
> Core(s) per socket: 1
> Socket(s): 2
> NUMA node(s): 1
> 
> 
> This is because core #0 is recorded for both packages #0 and #1. This deadlocks the scheduler.

This pull request has been closed without being integrated.

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PR: https://git.openjdk.java.net/jcstress/pull/40