[Bug 40191] ntdll:rtl test regression

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40191

--- Comment #3 from Sebastian Lackner <sebastian at fds-team.de> ---
(In reply to François Gouget from comment #2)
> Based on the WineTest results:
> * It only fails on real hardware and the TestBot only runs it on QEMU VMs.
> * It fails the same way whether the machine is running Windows 8, 8.1 or 10.
> * It fails the same way for 32 and 64 bit tests.
> * In every failing case the the SpinCount value is 33556432 or 0x020007d0.
> Does this value mean anything?
> 
> Maybe it's a CPU topology issue: all VMs emulate a dual single-core
> processor systems while the failures happen on single multi-core processor
> machines.

The exact value of SpinCount does not matter in this case and the test was
written to show a different aspect (mainly the DebugInfo field) - so marking
this behavior on Win 8+ as broken should be fine.

Most likely it has to do with the different number of cores, spin-locking is
only useful on multiprocessor systems. Nevertheless, is there any chance that
we could also get a testbot VM with more than one core, to find such issues a
bit earlier in the future? It could also be interesting for other
synchronization related functions which might behave different on
multiprocessor systems.

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