[Bug libc/27398] x86: Sporadic failures in tst-cpu-features-cpuinfo

[carlos at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27398

Carlos O'Donell <carlos at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |carlos at redhat dot com
         Resolution|INVALID                     |---

--- Comment #7 from Carlos O'Donell <carlos at redhat dot com> ---
(In reply to Siddhesh Poyarekar from comment #6)
> Yes, this is evidently not a glibc or a test issue.  Closing.

Just for reference I saw the same problem.

CPU0 cpuid and cpuinfo don't match.

I have the same model as Siddhesh but newer microcode.

processor       : 7
vendor_id       : GenuineIntel
cpu family      : 6
model           : 142
model name      : Intel(R) Core(TM) i7-8665U CPU @ 1.90GHz
stepping        : 12
microcode       : 0xea
cpu MHz         : 1059.308
cache size      : 8192 KB
physical id     : 0
siblings        : 8
core id         : 3
cpu cores       : 4
apicid          : 7
initial apicid  : 7
fpu             : yes
fpu_exception   : yes
cpuid level     : 22
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb
rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology
nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est
tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt
tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch
cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow
vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms
invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves
dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear
flush_l1d arch_capabilities
vmx flags       : vnmi preemption_timer invvpid ept_x_only ept_ad ept_1gb
flexpriority tsc_offset vtpr mtf vapic ept vpid unrestricted_guest ple
shadow_vmcs pml ept_mode_based_exec
bugs            : spectre_v1 spectre_v2 spec_store_bypass swapgs taa
itlb_multihit srbds
bogomips        : 4199.88
clflush size    : 64
cache_alignment : 64
address sizes   : 39 bits physical, 48 bits virtual
power management:

I'm reopening this because I think we should do something about the testing
aspect of improving false positives in the face of hardware bugs. Even if we
maintain a blacklist in support/* just for testing that would be OK with me.

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