fix(x86_64): handle processor frequency not present in CPUID

[charlottestinson]

Fixed unenumerated tinfo.numerator() causing panic.

Closes #537

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 67.99%. Comparing base (2825277) to head (7afebf4).

Files	Patch %	Lines
src/arch/x86_64/mod.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #688      +/-   ##
==========================================
- Coverage   68.05%   67.99%   -0.06%     
==========================================
  Files          20       20              
  Lines        2310     2312       +2     
==========================================
  Hits         1572     1572              
- Misses        738      740       +2     

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[mkroening]

Thanks for the PR! :)

What environment are you experiencing this in? Are you running on AMD where this may not be working according to the docs?

What happens on your system with this patch? Are you getting an "Unable to determine processor frequency" warning or is detect_freq_from_cpuid_hypervisor_info successful?

In the future, it might make sense to explore using sysinfo for this, which should be much more reliable: #690

Edit: Ah, this is for #537, right?

[mkroening]

@charlottestinson, @MrMunoz, are you planning to continue pursuing this PR? :)