[Bug libc/26823] New: FAIL: elf/tst-cpu-features-cpuinfo with recent trunk: HAS_CPU_FEATURE (ERMS)

[Bug libc/26823] New: FAIL: elf/tst-cpu-features-cpuinfo with recent trunk: HAS_CPU_FEATURE (ERMS)

[romain.geissler at amadeus dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26823

            Bug ID: 26823
           Summary: FAIL: elf/tst-cpu-features-cpuinfo with recent trunk:
                    HAS_CPU_FEATURE (ERMS)
           Product: glibc
           Version: 2.33
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: romain.geissler at amadeus dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

Hi,

I get failures with elf x86 test tst-cpu-features-cpuinfo. My configuration is
the following:
 - glibc sources are from commit 21181d1c7b181c4bb71e587c7944e100d923b393
 - I use an x86_64 machine
 - I build and run tests for glibc in a --privileged docker container (not sure
this has any influence).
 - My kernel is from RHEL 7: Linux 9f1b028ef771 3.10.0-1127.13.1.el7.x86_64 #1
SMP Fri Jun 12 14:34:17 EDT 2020 x86_64 GNU/Linux
 - This machine is a VM.

The failure I get is this one:

Checking HAS_CPU_FEATURE (ERMS):
  HAS_CPU_FEATURE (ERMS): 1
  cpuinfo (erms): 0
 *** failure ***


I am pasting /proc/cpuinfo for the first processor:

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) Gold 6148 CPU @ 2.40GHz
stepping        : 0
microcode       : 0x2000065
cpu MHz         : 2400.000
cache size      : 28160 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm
constant_tsc arch_perfmon nopl xt
opology tsc_reliable nonstop_tsc eagerfpu pni pclmulqdq ssse3 fma cx16 pcid
sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand
hypervisor lahf_lm abm inv
pcid_single ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 avx2 smep bmi2
invpcid xsaveopt arat md_clear spec_ctrl intel_stibp flush_l1d
arch_capabilities
bogomips        : 4800.00
clflush size    : 64
cache_alignment : 64
address sizes   : 42 bits physical, 48 bits virtual
power management:

Is this something expected ?

Cheers,
Romain

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[Bug build/26823] FAIL: elf/tst-cpu-features-cpuinfo with recent trunk: HAS_CPU_FEATURE (ERMS)

[romain.geissler at amadeus dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26823

Romain Geissler <romain.geissler at amadeus dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|libc                        |build
                 CC|                            |carlos at redhat dot com

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[Bug build/26823] FAIL: elf/tst-cpu-features-cpuinfo with recent trunk: HAS_CPU_FEATURE (ERMS)

[romain.geissler at amadeus dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26823

--- Comment #1 from Romain Geissler <romain.geissler at amadeus dot com> ---
I am still seeing this test failing with latest gcc trunk and glibc trunk.

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[Bug build/26823] FAIL: elf/tst-cpu-features-cpuinfo with recent trunk: HAS_CPU_FEATURE (ERMS)

[romain.geissler at amadeus dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26823

--- Comment #2 from Romain Geissler <romain.geissler at amadeus dot com> ---
Hi,

I have now tried with the released glibc 2.33 and still see this issue. H.J.,
it looks like similar issues were posted on the list here
https://sourceware.org/pipermail/libc-alpha/2021-February/122227.html, so is
there anything which should be done to fix the ERMS case as well ?

Cheers,
Romain

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