* glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static.
@ 2022-01-14 16:43 Carlos O'Donell
2022-01-14 17:00 ` Florian Weimer
0 siblings, 1 reply; 9+ messages in thread
From: Carlos O'Donell @ 2022-01-14 16:43 UTC (permalink / raw)
To: libc-alpha, H.J. Lu
HJ,
On Fedora 35 I'm seeing a failure in elf/tst-cpu-features-cpuinfo-static.
Have you seen this failure?
The machine is Lenovo T590 (/proc/cpuinfo provided below) laptop.
FAIL: elf/tst-cpu-features-cpuinfo-static
original exit status 1
Checking HAS_CPU_FEATURE (ACPI):
HAS_CPU_FEATURE (ACPI): 1
cpuinfo (acpi): 1
Checking HAS_CPU_FEATURE (ADX):
HAS_CPU_FEATURE (ADX): 1
cpuinfo (adx): 1
Checking HAS_CPU_FEATURE (APIC):
HAS_CPU_FEATURE (APIC): 1
cpuinfo (apic): 1
Checking HAS_CPU_FEATURE (AES):
HAS_CPU_FEATURE (AES): 1
cpuinfo (aes): 1
Checking HAS_CPU_FEATURE (AMX_BF16):
HAS_CPU_FEATURE (AMX_BF16): 0
cpuinfo (amx_bf16): 0
Checking HAS_CPU_FEATURE (AMX_INT8):
HAS_CPU_FEATURE (AMX_INT8): 0
cpuinfo (amx_int8): 0
Checking HAS_CPU_FEATURE (AMX_TILE):
HAS_CPU_FEATURE (AMX_TILE): 0
cpuinfo (amx_tile): 0
Checking HAS_CPU_FEATURE (ARCH_CAPABILITIES):
HAS_CPU_FEATURE (ARCH_CAPABILITIES): 1
cpuinfo (arch_capabilities): 1
Checking HAS_CPU_FEATURE (AVX):
HAS_CPU_FEATURE (AVX): 1
cpuinfo (avx): 1
Checking HAS_CPU_FEATURE (AVX2):
HAS_CPU_FEATURE (AVX2): 1
cpuinfo (avx2): 1
Checking HAS_CPU_FEATURE (AVX512_4FMAPS):
HAS_CPU_FEATURE (AVX512_4FMAPS): 0
cpuinfo (avx512_4fmaps): 0
Checking HAS_CPU_FEATURE (AVX512_4VNNIW):
HAS_CPU_FEATURE (AVX512_4VNNIW): 0
cpuinfo (avx512_4vnniw): 0
Checking HAS_CPU_FEATURE (AVX512_BF16):
HAS_CPU_FEATURE (AVX512_BF16): 0
cpuinfo (avx512_bf16): 0
Checking HAS_CPU_FEATURE (AVX512_BITALG):
HAS_CPU_FEATURE (AVX512_BITALG): 0
cpuinfo (avx512_bitalg): 0
Checking HAS_CPU_FEATURE (AVX512_IFMA):
HAS_CPU_FEATURE (AVX512_IFMA): 0
cpuinfo (avx512ifma): 0
Checking HAS_CPU_FEATURE (AVX512_VBMI):
HAS_CPU_FEATURE (AVX512_VBMI): 0
cpuinfo (avx512vbmi): 0
Checking HAS_CPU_FEATURE (AVX512_VBMI2):
HAS_CPU_FEATURE (AVX512_VBMI2): 0
cpuinfo (avx512_vbmi2): 0
Checking HAS_CPU_FEATURE (AVX512_VNNI):
HAS_CPU_FEATURE (AVX512_VNNI): 0
cpuinfo (avx512_vnni): 0
Checking HAS_CPU_FEATURE (AVX512_VP2INTERSECT):
HAS_CPU_FEATURE (AVX512_VP2INTERSECT): 0
cpuinfo (avx512_vp2intersect): 0
Checking HAS_CPU_FEATURE (AVX512_VPOPCNTDQ):
HAS_CPU_FEATURE (AVX512_VPOPCNTDQ): 0
cpuinfo (avx512_vpopcntdq): 0
Checking HAS_CPU_FEATURE (AVX512BW):
HAS_CPU_FEATURE (AVX512BW): 0
cpuinfo (avx512bw): 0
Checking HAS_CPU_FEATURE (AVX512CD):
HAS_CPU_FEATURE (AVX512CD): 0
cpuinfo (avx512cd): 0
Checking HAS_CPU_FEATURE (AVX512ER):
HAS_CPU_FEATURE (AVX512ER): 0
cpuinfo (avx512er): 0
Checking HAS_CPU_FEATURE (AVX512DQ):
HAS_CPU_FEATURE (AVX512DQ): 0
cpuinfo (avx512dq): 0
Checking HAS_CPU_FEATURE (AVX512F):
HAS_CPU_FEATURE (AVX512F): 0
cpuinfo (avx512f): 0
Checking HAS_CPU_FEATURE (AVX512PF):
HAS_CPU_FEATURE (AVX512PF): 0
cpuinfo (avx512pf): 0
Checking HAS_CPU_FEATURE (AVX512VL):
HAS_CPU_FEATURE (AVX512VL): 0
cpuinfo (avx512vl): 0
Checking HAS_CPU_FEATURE (BMI1):
HAS_CPU_FEATURE (BMI1): 1
cpuinfo (bmi1): 1
Checking HAS_CPU_FEATURE (BMI2):
HAS_CPU_FEATURE (BMI2): 1
cpuinfo (bmi2): 1
Checking HAS_CPU_FEATURE (CLDEMOTE):
HAS_CPU_FEATURE (CLDEMOTE): 0
cpuinfo (cldemote): 0
Checking HAS_CPU_FEATURE (CLFLUSHOPT):
HAS_CPU_FEATURE (CLFLUSHOPT): 1
cpuinfo (clflushopt): 1
Checking HAS_CPU_FEATURE (CLFSH):
HAS_CPU_FEATURE (CLFSH): 1
cpuinfo (clflush): 1
Checking HAS_CPU_FEATURE (CLWB):
HAS_CPU_FEATURE (CLWB): 0
cpuinfo (clwb): 0
Checking HAS_CPU_FEATURE (CMOV):
HAS_CPU_FEATURE (CMOV): 1
cpuinfo (cmov): 1
Checking HAS_CPU_FEATURE (CMPXCHG16B):
HAS_CPU_FEATURE (CMPXCHG16B): 1
cpuinfo (cx16): 1
Checking HAS_CPU_FEATURE (CNXT_ID):
HAS_CPU_FEATURE (CNXT_ID): 0
cpuinfo (cnxt_id): 0
Checking HAS_CPU_FEATURE (CORE_CAPABILITIES):
HAS_CPU_FEATURE (CORE_CAPABILITIES): 0
cpuinfo (core_capabilities): 0
Checking HAS_CPU_FEATURE (CX8):
HAS_CPU_FEATURE (CX8): 1
cpuinfo (cx8): 1
Checking HAS_CPU_FEATURE (DCA):
HAS_CPU_FEATURE (DCA): 0
cpuinfo (dca): 0
Checking HAS_CPU_FEATURE (DE):
HAS_CPU_FEATURE (DE): 1
cpuinfo (de): 1
Checking HAS_CPU_FEATURE (DEPR_FPU_CS_DS):
HAS_CPU_FEATURE (DEPR_FPU_CS_DS): 1
cpuinfo (zero_fcs_fds): 0
*** missing in /proc/cpuinfo ***
Checking HAS_CPU_FEATURE (DS):
HAS_CPU_FEATURE (DS): 1
cpuinfo (dts): 1
Checking HAS_CPU_FEATURE (DS_CPL):
HAS_CPU_FEATURE (DS_CPL): 1
cpuinfo (ds_cpl): 1
Checking HAS_CPU_FEATURE (DTES64):
HAS_CPU_FEATURE (DTES64): 1
cpuinfo (dtes64): 1
Checking HAS_CPU_FEATURE (EIST):
HAS_CPU_FEATURE (EIST): 1
cpuinfo (est): 1
Checking HAS_CPU_FEATURE (ENQCMD):
HAS_CPU_FEATURE (ENQCMD): 0
cpuinfo (enqcmd): 0
Checking HAS_CPU_FEATURE (ERMS):
HAS_CPU_FEATURE (ERMS): 1
cpuinfo (erms): 1
Checking HAS_CPU_FEATURE (F16C):
HAS_CPU_FEATURE (F16C): 1
cpuinfo (f16c): 1
Checking HAS_CPU_FEATURE (FMA):
HAS_CPU_FEATURE (FMA): 1
cpuinfo (fma): 1
Checking HAS_CPU_FEATURE (FMA4):
HAS_CPU_FEATURE (FMA4): 0
cpuinfo (fma4): 0
Checking HAS_CPU_FEATURE (FPU):
HAS_CPU_FEATURE (FPU): 1
cpuinfo (fpu): 1
Checking HAS_CPU_FEATURE (FSGSBASE):
HAS_CPU_FEATURE (FSGSBASE): 1
cpuinfo (fsgsbase): 1
Checking HAS_CPU_FEATURE (FSRM):
HAS_CPU_FEATURE (FSRM): 0
cpuinfo (fsrm): 0
Checking HAS_CPU_FEATURE (FXSR):
HAS_CPU_FEATURE (FXSR): 1
cpuinfo (fxsr): 1
Checking HAS_CPU_FEATURE (GFNI):
HAS_CPU_FEATURE (GFNI): 0
cpuinfo (gfni): 0
Checking HAS_CPU_FEATURE (HLE):
HAS_CPU_FEATURE (HLE): 1
cpuinfo (hle): 0
*** failure ***
Checking HAS_CPU_FEATURE (HTT):
HAS_CPU_FEATURE (HTT): 1
cpuinfo (ht): 1
Checking HAS_CPU_FEATURE (HYBRID):
HAS_CPU_FEATURE (HYBRID): 0
cpuinfo (hybrid): 0
Checking HAS_CPU_FEATURE (IBRS_IBPB):
HAS_CPU_FEATURE (IBRS_IBPB): 1
cpuinfo (ibrs): 1
Checking HAS_CPU_FEATURE (STIBP):
HAS_CPU_FEATURE (STIBP): 1
cpuinfo (stibp): 1
Checking HAS_CPU_FEATURE (IBT):
HAS_CPU_FEATURE (IBT): 0
cpuinfo (ibt): 0
Checking HAS_CPU_FEATURE (INVARIANT_TSC):
HAS_CPU_FEATURE (INVARIANT_TSC): 1
cpuinfo (invariant_tsc): 0
*** missing in /proc/cpuinfo ***
Checking HAS_CPU_FEATURE (INVPCID):
HAS_CPU_FEATURE (INVPCID): 1
cpuinfo (invpcid): 1
Checking HAS_CPU_FEATURE (L1D_FLUSH):
HAS_CPU_FEATURE (L1D_FLUSH): 1
cpuinfo (flush_l1d): 1
Checking HAS_CPU_FEATURE (LAHF64_SAHF64):
HAS_CPU_FEATURE (LAHF64_SAHF64): 1
cpuinfo (lahf_lm): 1
Checking HAS_CPU_FEATURE (LM):
HAS_CPU_FEATURE (LM): 1
cpuinfo (lm): 1
Checking HAS_CPU_FEATURE (LWP):
HAS_CPU_FEATURE (LWP): 0
cpuinfo (lwp): 0
Checking HAS_CPU_FEATURE (LZCNT):
HAS_CPU_FEATURE (LZCNT): 1
cpuinfo (abm): 1
Checking HAS_CPU_FEATURE (MCA):
HAS_CPU_FEATURE (MCA): 1
cpuinfo (mca): 1
Checking HAS_CPU_FEATURE (MCE):
HAS_CPU_FEATURE (MCE): 1
cpuinfo (mce): 1
Checking HAS_CPU_FEATURE (MD_CLEAR):
HAS_CPU_FEATURE (MD_CLEAR): 1
cpuinfo (md_clear): 1
Checking HAS_CPU_FEATURE (MMX):
HAS_CPU_FEATURE (MMX): 1
cpuinfo (mmx): 1
Checking HAS_CPU_FEATURE (MONITOR):
HAS_CPU_FEATURE (MONITOR): 1
cpuinfo (monitor): 1
Checking HAS_CPU_FEATURE (MOVBE):
HAS_CPU_FEATURE (MOVBE): 1
cpuinfo (movbe): 1
Checking HAS_CPU_FEATURE (MOVDIRI):
HAS_CPU_FEATURE (MOVDIRI): 0
cpuinfo (movdiri): 0
Checking HAS_CPU_FEATURE (MOVDIR64B):
HAS_CPU_FEATURE (MOVDIR64B): 0
cpuinfo (movdir64b): 0
Checking HAS_CPU_FEATURE (MPX):
HAS_CPU_FEATURE (MPX): 1
cpuinfo (mpx): 1
Checking HAS_CPU_FEATURE (MSR):
HAS_CPU_FEATURE (MSR): 1
cpuinfo (msr): 1
Checking HAS_CPU_FEATURE (MTRR):
HAS_CPU_FEATURE (MTRR): 1
cpuinfo (mtrr): 1
Checking HAS_CPU_FEATURE (NX):
HAS_CPU_FEATURE (NX): 1
cpuinfo (nx): 1
Checking HAS_CPU_FEATURE (OSPKE):
HAS_CPU_FEATURE (OSPKE): 0
cpuinfo (ospke): 0
Checking HAS_CPU_FEATURE (PAE):
HAS_CPU_FEATURE (PAE): 1
cpuinfo (pae): 1
Checking HAS_CPU_FEATURE (PAGE1GB):
HAS_CPU_FEATURE (PAGE1GB): 1
cpuinfo (pdpe1gb): 1
Checking HAS_CPU_FEATURE (PAT):
HAS_CPU_FEATURE (PAT): 1
cpuinfo (pat): 1
Checking HAS_CPU_FEATURE (PBE):
HAS_CPU_FEATURE (PBE): 1
cpuinfo (pbe): 1
Checking HAS_CPU_FEATURE (PCID):
HAS_CPU_FEATURE (PCID): 1
cpuinfo (pcid): 1
Checking HAS_CPU_FEATURE (PCLMULQDQ):
HAS_CPU_FEATURE (PCLMULQDQ): 1
cpuinfo (pclmulqdq): 1
Checking HAS_CPU_FEATURE (PCONFIG):
HAS_CPU_FEATURE (PCONFIG): 0
cpuinfo (pconfig): 0
Checking HAS_CPU_FEATURE (PDCM):
HAS_CPU_FEATURE (PDCM): 1
cpuinfo (pdcm): 1
Checking HAS_CPU_FEATURE (PGE):
HAS_CPU_FEATURE (PGE): 1
cpuinfo (pge): 1
Checking HAS_CPU_FEATURE (PKS):
HAS_CPU_FEATURE (PKS): 0
cpuinfo (pks): 0
Checking HAS_CPU_FEATURE (PKU):
HAS_CPU_FEATURE (PKU): 0
cpuinfo (pku): 0
Checking HAS_CPU_FEATURE (POPCNT):
HAS_CPU_FEATURE (POPCNT): 1
cpuinfo (popcnt): 1
Checking HAS_CPU_FEATURE (PREFETCHW):
HAS_CPU_FEATURE (PREFETCHW): 1
cpuinfo (3dnowprefetch): 1
Checking HAS_CPU_FEATURE (PREFETCHWT1):
HAS_CPU_FEATURE (PREFETCHWT1): 0
cpuinfo (prefetchwt1): 0
Checking HAS_CPU_FEATURE (PTWRITE):
HAS_CPU_FEATURE (PTWRITE): 0
cpuinfo (ptwrite): 0
Checking HAS_CPU_FEATURE (PSE):
HAS_CPU_FEATURE (PSE): 1
cpuinfo (pse): 1
Checking HAS_CPU_FEATURE (PSE_36):
HAS_CPU_FEATURE (PSE_36): 1
cpuinfo (pse36): 1
Checking HAS_CPU_FEATURE (PSN):
HAS_CPU_FEATURE (PSN): 0
cpuinfo (psn): 0
Checking HAS_CPU_FEATURE (RDPID):
HAS_CPU_FEATURE (RDPID): 0
cpuinfo (rdpid): 0
Checking HAS_CPU_FEATURE (RDRAND):
HAS_CPU_FEATURE (RDRAND): 1
cpuinfo (rdrand): 1
Checking HAS_CPU_FEATURE (RDSEED):
HAS_CPU_FEATURE (RDSEED): 1
cpuinfo (rdseed): 1
Checking HAS_CPU_FEATURE (RDT_A):
HAS_CPU_FEATURE (RDT_A): 0
cpuinfo (rdt_a): 0
Checking HAS_CPU_FEATURE (RDT_M):
HAS_CPU_FEATURE (RDT_M): 0
cpuinfo (cqm): 0
Checking HAS_CPU_FEATURE (RDTSCP):
HAS_CPU_FEATURE (RDTSCP): 1
cpuinfo (rdtscp): 1
Checking HAS_CPU_FEATURE (RTM):
HAS_CPU_FEATURE (RTM): 1
cpuinfo (rtm): 0
*** failure ***
Checking HAS_CPU_FEATURE (SDBG):
HAS_CPU_FEATURE (SDBG): 1
cpuinfo (sdbg): 1
Checking HAS_CPU_FEATURE (SEP):
HAS_CPU_FEATURE (SEP): 1
cpuinfo (sep): 1
Checking HAS_CPU_FEATURE (SERIALIZE):
HAS_CPU_FEATURE (SERIALIZE): 0
cpuinfo (serialize): 0
Checking HAS_CPU_FEATURE (SGX):
HAS_CPU_FEATURE (SGX): 1
cpuinfo (sgx): 0
*** missing in /proc/cpuinfo ***
Checking HAS_CPU_FEATURE (SGX_LC):
HAS_CPU_FEATURE (SGX_LC): 0
cpuinfo (sgx_lc): 0
Checking HAS_CPU_FEATURE (SHA):
HAS_CPU_FEATURE (SHA): 0
cpuinfo (sha_ni): 0
Checking HAS_CPU_FEATURE (SHSTK):
HAS_CPU_FEATURE (SHSTK): 0
cpuinfo (shstk): 0
Checking HAS_CPU_FEATURE (SMAP):
HAS_CPU_FEATURE (SMAP): 1
cpuinfo (smap): 1
Checking HAS_CPU_FEATURE (SMEP):
HAS_CPU_FEATURE (SMEP): 1
cpuinfo (smep): 1
Checking HAS_CPU_FEATURE (SMX):
HAS_CPU_FEATURE (SMX): 1
cpuinfo (smx): 1
Checking HAS_CPU_FEATURE (SS):
HAS_CPU_FEATURE (SS): 1
cpuinfo (ss): 1
Checking HAS_CPU_FEATURE (SSBD):
HAS_CPU_FEATURE (SSBD): 1
cpuinfo (ssbd): 1
Checking HAS_CPU_FEATURE (SSE):
HAS_CPU_FEATURE (SSE): 1
cpuinfo (sse): 1
Checking HAS_CPU_FEATURE (SSE2):
HAS_CPU_FEATURE (SSE2): 1
cpuinfo (sse2): 1
Checking HAS_CPU_FEATURE (SSE3):
HAS_CPU_FEATURE (SSE3): 1
cpuinfo (pni): 1
Checking HAS_CPU_FEATURE (SSE4_1):
HAS_CPU_FEATURE (SSE4_1): 1
cpuinfo (sse4_1): 1
Checking HAS_CPU_FEATURE (SSE4_2):
HAS_CPU_FEATURE (SSE4_2): 1
cpuinfo (sse4_2): 1
Checking HAS_CPU_FEATURE (SSE4A):
HAS_CPU_FEATURE (SSE4A): 0
cpuinfo (sse4a): 0
Checking HAS_CPU_FEATURE (SSSE3):
HAS_CPU_FEATURE (SSSE3): 1
cpuinfo (ssse3): 1
Checking HAS_CPU_FEATURE (SVM):
HAS_CPU_FEATURE (SVM): 0
cpuinfo (svm): 0
Checking HAS_CPU_FEATURE (SYSCALL_SYSRET):
HAS_CPU_FEATURE (SYSCALL_SYSRET): 1
cpuinfo (syscall): 1
Checking HAS_CPU_FEATURE (TBM):
HAS_CPU_FEATURE (TBM): 0
cpuinfo (tbm): 0
Checking HAS_CPU_FEATURE (TM):
HAS_CPU_FEATURE (TM): 1
cpuinfo (tm): 1
Checking HAS_CPU_FEATURE (TM2):
HAS_CPU_FEATURE (TM2): 1
cpuinfo (tm2): 1
Checking HAS_CPU_FEATURE (TRACE):
HAS_CPU_FEATURE (TRACE): 1
cpuinfo (intel_pt): 1
Checking HAS_CPU_FEATURE (TSC):
HAS_CPU_FEATURE (TSC): 1
cpuinfo (tsc): 1
Checking HAS_CPU_FEATURE (TSC_ADJUST):
HAS_CPU_FEATURE (TSC_ADJUST): 1
cpuinfo (tsc_adjust): 1
Checking HAS_CPU_FEATURE (TSC_DEADLINE):
HAS_CPU_FEATURE (TSC_DEADLINE): 1
cpuinfo (tsc_deadline_timer): 1
Checking HAS_CPU_FEATURE (TSXLDTRK):
HAS_CPU_FEATURE (TSXLDTRK): 0
cpuinfo (tsxldtrk): 0
Checking HAS_CPU_FEATURE (UMIP):
HAS_CPU_FEATURE (UMIP): 0
cpuinfo (umip): 0
Checking HAS_CPU_FEATURE (VAES):
HAS_CPU_FEATURE (VAES): 0
cpuinfo (vaes): 0
Checking HAS_CPU_FEATURE (VME):
HAS_CPU_FEATURE (VME): 1
cpuinfo (vme): 1
Checking HAS_CPU_FEATURE (VMX):
HAS_CPU_FEATURE (VMX): 1
cpuinfo (vmx): 1
Checking HAS_CPU_FEATURE (VPCLMULQDQ):
HAS_CPU_FEATURE (VPCLMULQDQ): 0
cpuinfo (vpclmulqdq): 0
Checking HAS_CPU_FEATURE (WAITPKG):
HAS_CPU_FEATURE (WAITPKG): 0
cpuinfo (waitpkg): 0
Checking HAS_CPU_FEATURE (WBNOINVD):
HAS_CPU_FEATURE (WBNOINVD): 0
cpuinfo (wbnoinvd): 0
Checking HAS_CPU_FEATURE (X2APIC):
HAS_CPU_FEATURE (X2APIC): 1
cpuinfo (x2apic): 1
Checking HAS_CPU_FEATURE (XFD):
HAS_CPU_FEATURE (XFD): 0
cpuinfo (xfd): 0
Checking HAS_CPU_FEATURE (XGETBV_ECX_1):
HAS_CPU_FEATURE (XGETBV_ECX_1): 1
cpuinfo (xgetbv1): 1
Checking HAS_CPU_FEATURE (XOP):
HAS_CPU_FEATURE (XOP): 0
cpuinfo (xop): 0
Checking HAS_CPU_FEATURE (XSAVE):
HAS_CPU_FEATURE (XSAVE): 1
cpuinfo (xsave): 1
Checking HAS_CPU_FEATURE (XSAVEC):
HAS_CPU_FEATURE (XSAVEC): 1
cpuinfo (xsavec): 1
Checking HAS_CPU_FEATURE (XSAVEOPT):
HAS_CPU_FEATURE (XSAVEOPT): 1
cpuinfo (xsaveopt): 1
Checking HAS_CPU_FEATURE (XSAVES):
HAS_CPU_FEATURE (XSAVES): 1
cpuinfo (xsaves): 1
Checking HAS_CPU_FEATURE (XTPRUPDCTRL):
HAS_CPU_FEATURE (XTPRUPDCTRL): 1
cpuinfo (xtpr): 1
2 differences between /proc/cpuinfo and glibc code.
cat /proc/cpuinfo
processor : 0
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 : 2100.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
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:
processor : 1
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 : 2100.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 1
cpu cores : 4
apicid : 2
initial apicid : 2
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:
processor : 2
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 : 2048.597
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 2
cpu cores : 4
apicid : 4
initial apicid : 4
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:
processor : 3
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 : 2221.649
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 3
cpu cores : 4
apicid : 6
initial apicid : 6
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:
processor : 4
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 : 2100.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 0
cpu cores : 4
apicid : 1
initial apicid : 1
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:
processor : 5
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 : 900.069
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 1
cpu cores : 4
apicid : 3
initial apicid : 3
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:
processor : 6
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 : 2100.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 2
cpu cores : 4
apicid : 5
initial apicid : 5
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:
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 : 2100.000
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:
--
Cheers,
Carlos.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static.
2022-01-14 16:43 glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static Carlos O'Donell
@ 2022-01-14 17:00 ` Florian Weimer
2022-01-14 18:05 ` H.J. Lu
0 siblings, 1 reply; 9+ messages in thread
From: Florian Weimer @ 2022-01-14 17:00 UTC (permalink / raw)
To: Carlos O'Donell via Libc-alpha
* Carlos O'Donell via Libc-alpha:
> Checking HAS_CPU_FEATURE (RTM):
> HAS_CPU_FEATURE (RTM): 1
> cpuinfo (rtm): 0
> *** failure ***
Could you pin this test to specific CPUs and see if it behaves
differently depending on the CPU?
Thanks,
Florian
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static.
2022-01-14 17:00 ` Florian Weimer
@ 2022-01-14 18:05 ` H.J. Lu
2022-01-14 18:13 ` Florian Weimer
0 siblings, 1 reply; 9+ messages in thread
From: H.J. Lu @ 2022-01-14 18:05 UTC (permalink / raw)
To: Florian Weimer; +Cc: Carlos O'Donell via Libc-alpha, Carlos O'Donell
On Fri, Jan 14, 2022 at 9:00 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * Carlos O'Donell via Libc-alpha:
>
> > Checking HAS_CPU_FEATURE (RTM):
> > HAS_CPU_FEATURE (RTM): 1
> > cpuinfo (rtm): 0
> > *** failure ***
>
> Could you pin this test to specific CPUs and see if it behaves
> differently depending on the CPU?
>
Hi Carlos,
I believe you ran into:
https://sourceware.org/bugzilla/show_bug.cgi?id=28033
https://www.intel.com/content/www/us/en/support/articles/000059422/processors.html
Specifically your CPU is listed as
06_9EH <=0xC 8th/9th Generation Intel® Core™ Processors and Intel®
Pentium® Processors based on Coffee Lake microarchitecture
I think we should black list all CPUs on the list.
--
H.J.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static.
2022-01-14 18:05 ` H.J. Lu
@ 2022-01-14 18:13 ` Florian Weimer
2022-01-14 21:09 ` Carlos O'Donell
0 siblings, 1 reply; 9+ messages in thread
From: Florian Weimer @ 2022-01-14 18:13 UTC (permalink / raw)
To: H.J. Lu; +Cc: Carlos O'Donell via Libc-alpha, Carlos O'Donell
* H. J. Lu:
> On Fri, Jan 14, 2022 at 9:00 AM Florian Weimer <fweimer@redhat.com> wrote:
>>
>> * Carlos O'Donell via Libc-alpha:
>>
>> > Checking HAS_CPU_FEATURE (RTM):
>> > HAS_CPU_FEATURE (RTM): 1
>> > cpuinfo (rtm): 0
>> > *** failure ***
>>
>> Could you pin this test to specific CPUs and see if it behaves
>> differently depending on the CPU?
>>
>
> Hi Carlos,
>
> I believe you ran into:
>
> https://sourceware.org/bugzilla/show_bug.cgi?id=28033
> https://www.intel.com/content/www/us/en/support/articles/000059422/processors.html
>
> Specifically your CPU is listed as
>
> 06_9EH <=0xC 8th/9th Generation Intel® Core™ Processors and Intel®
> Pentium® Processors based on Coffee Lake microarchitecture
>
> I think we should black list all CPUs on the list.
I think Siddhesh ran into this before, after laptop suspend. It's a
firmware or kernel bug that the CPUID state across cores is inconsistent
after suspend. It's not a glibc issue.
Thanks,
Florian
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static.
2022-01-14 18:13 ` Florian Weimer
@ 2022-01-14 21:09 ` Carlos O'Donell
2022-01-14 21:11 ` Florian Weimer
0 siblings, 1 reply; 9+ messages in thread
From: Carlos O'Donell @ 2022-01-14 21:09 UTC (permalink / raw)
To: Florian Weimer, H.J. Lu; +Cc: Carlos O'Donell via Libc-alpha
On 1/14/22 13:13, Florian Weimer wrote:
> * H. J. Lu:
>
>> On Fri, Jan 14, 2022 at 9:00 AM Florian Weimer <fweimer@redhat.com> wrote:
>>>
>>> * Carlos O'Donell via Libc-alpha:
>>>
>>>> Checking HAS_CPU_FEATURE (RTM):
>>>> HAS_CPU_FEATURE (RTM): 1
>>>> cpuinfo (rtm): 0
>>>> *** failure ***
>>>
>>> Could you pin this test to specific CPUs and see if it behaves
>>> differently depending on the CPU?
>>>
>>
>> Hi Carlos,
>>
>> I believe you ran into:
>>
>> https://sourceware.org/bugzilla/show_bug.cgi?id=28033
>> https://www.intel.com/content/www/us/en/support/articles/000059422/processors.html
>>
>> Specifically your CPU is listed as
>>
>> 06_9EH <=0xC 8th/9th Generation Intel® Core™ Processors and Intel®
>> Pentium® Processors based on Coffee Lake microarchitecture
>>
>> I think we should black list all CPUs on the list.
>
> I think Siddhesh ran into this before, after laptop suspend. It's a
> firmware or kernel bug that the CPUID state across cores is inconsistent
> after suspend. It's not a glibc issue.
Can we make our testing detect this and mark the test XFAIL?
Or as HJ say, blacklist the CPU from the test e.g. UNSUPPORTED?
--
Cheers,
Carlos.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static.
2022-01-14 21:09 ` Carlos O'Donell
@ 2022-01-14 21:11 ` Florian Weimer
2022-01-14 22:10 ` Carlos O'Donell
0 siblings, 1 reply; 9+ messages in thread
From: Florian Weimer @ 2022-01-14 21:11 UTC (permalink / raw)
To: Carlos O'Donell; +Cc: H.J. Lu, Carlos O'Donell via Libc-alpha
* Carlos O'Donell:
> Can we make our testing detect this and mark the test XFAIL?
If we treat this as our bug, we'd have to run CPUID on *all* CPUs during
glibc startup. The bug is visible to applications as well. I don't
think this is feasible.
> Or as HJ say, blacklist the CPU from the test e.g. UNSUPPORTED?
I think the bug isn't CPU-specific.
Thanks,
Florian
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static.
2022-01-14 21:11 ` Florian Weimer
@ 2022-01-14 22:10 ` Carlos O'Donell
2022-01-14 22:23 ` Florian Weimer
0 siblings, 1 reply; 9+ messages in thread
From: Carlos O'Donell @ 2022-01-14 22:10 UTC (permalink / raw)
To: Florian Weimer; +Cc: H.J. Lu, Carlos O'Donell via Libc-alpha
On 1/14/22 16:11, Florian Weimer wrote:
> * Carlos O'Donell:
>
>> Can we make our testing detect this and mark the test XFAIL?
>
> If we treat this as our bug, we'd have to run CPUID on *all* CPUs during
> glibc startup. The bug is visible to applications as well. I don't
> think this is feasible.
I thought we already ran cpuid at startup for all cpus?
In cpu-features.c (init_cpu_features) we call __cpuid() unconditionally, and that
is called via ARCH_INIT_CPU_FEATURES() in LIBC_START_MAIN (static), and
DL_PLATFORM_INIT in ld.so (shared).
In fact we might call cpuid five or six times during startup?
>> Or as HJ say, blacklist the CPU from the test e.g. UNSUPPORTED?
>
> I think the bug isn't CPU-specific.
Could you expand in this a bit more?
My concern is that testing should be robust and not return false positives to
the extent that we can prevent that. False positives, regardless of who is at
fault, call into question the validity of the test infrastructure. There is a
cost to such prevention of false positives, for certain, there is a practical
limit to the work we can do.
--
Cheers,
Carlos.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static.
2022-01-14 22:10 ` Carlos O'Donell
@ 2022-01-14 22:23 ` Florian Weimer
2022-01-14 22:30 ` Carlos O'Donell
0 siblings, 1 reply; 9+ messages in thread
From: Florian Weimer @ 2022-01-14 22:23 UTC (permalink / raw)
To: Carlos O'Donell; +Cc: H.J. Lu, Carlos O'Donell via Libc-alpha
* Carlos O'Donell:
> On 1/14/22 16:11, Florian Weimer wrote:
>> * Carlos O'Donell:
>>
>>> Can we make our testing detect this and mark the test XFAIL?
>>
>> If we treat this as our bug, we'd have to run CPUID on *all* CPUs during
>> glibc startup. The bug is visible to applications as well. I don't
>> think this is feasible.
>
> I thought we already ran cpuid at startup for all cpus?
>
> In cpu-features.c (init_cpu_features) we call __cpuid() unconditionally, and that
> is called via ARCH_INIT_CPU_FEATURES() in LIBC_START_MAIN (static), and
> DL_PLATFORM_INIT in ld.so (shared).
>
> In fact we might call cpuid five or six times during startup?
It runs on a random CPU. It could be CPU 0 or another CPU. We pretend
that it doesn't matter.
>>> Or as HJ say, blacklist the CPU from the test e.g. UNSUPPORTED?
>>
>> I think the bug isn't CPU-specific.
>
> Could you expand in this a bit more?
Maybe I was mistaken. Siddhesh has an i7-8665U. I must have mixed up
my timelines. That CPU was released in 2019.
> My concern is that testing should be robust and not return false
> positives to the extent that we can prevent that. False positives,
> regardless of who is at fault, call into question the validity of the
> test infrastructure. There is a cost to such prevention of false
> positives, for certain, there is a practical limit to the work we can
> do.
It's a true positive in the sense that the glibc detection (in
<sys/platform/x86.h>) does not work correctly. Now that might not be
useful information to us as glibc developers because it's realistically
not our problem, but we as Red Hat (or other distributions) should
actually work towards fixing this issue.
Thanks,
Florian
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static.
2022-01-14 22:23 ` Florian Weimer
@ 2022-01-14 22:30 ` Carlos O'Donell
0 siblings, 0 replies; 9+ messages in thread
From: Carlos O'Donell @ 2022-01-14 22:30 UTC (permalink / raw)
To: Florian Weimer; +Cc: H.J. Lu, Carlos O'Donell via Libc-alpha
On 1/14/22 17:23, Florian Weimer wrote:
> * Carlos O'Donell:
>
>> On 1/14/22 16:11, Florian Weimer wrote:
>>> * Carlos O'Donell:
>>>
>>>> Can we make our testing detect this and mark the test XFAIL?
>>>
>>> If we treat this as our bug, we'd have to run CPUID on *all* CPUs during
>>> glibc startup. The bug is visible to applications as well. I don't
>>> think this is feasible.
>>
>> I thought we already ran cpuid at startup for all cpus?
>>
>> In cpu-features.c (init_cpu_features) we call __cpuid() unconditionally, and that
>> is called via ARCH_INIT_CPU_FEATURES() in LIBC_START_MAIN (static), and
>> DL_PLATFORM_INIT in ld.so (shared).
>>
>> In fact we might call cpuid five or six times during startup?
>
> It runs on a random CPU. It could be CPU 0 or another CPU. We pretend
> that it doesn't matter.
Ah! I see what you mean now by "all CPUs." Thank you.
>>>> Or as HJ say, blacklist the CPU from the test e.g. UNSUPPORTED?
>>>
>>> I think the bug isn't CPU-specific.
>>
>> Could you expand in this a bit more?
>
> Maybe I was mistaken. Siddhesh has an i7-8665U. I must have mixed up
> my timelines. That CPU was released in 2019.
I have exactly the same CPU.
>> My concern is that testing should be robust and not return false
>> positives to the extent that we can prevent that. False positives,
>> regardless of who is at fault, call into question the validity of the
>> test infrastructure. There is a cost to such prevention of false
>> positives, for certain, there is a practical limit to the work we can
>> do.
>
> It's a true positive in the sense that the glibc detection (in
> <sys/platform/x86.h>) does not work correctly. Now that might not be
> useful information to us as glibc developers because it's realistically
> not our problem, but we as Red Hat (or other distributions) should
> actually work towards fixing this issue.
Because this could be a kernel 5.15 resume issue or another issue?
Yes, fixing it correctly would be best.
--
Cheers,
Carlos.
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2022-01-14 22:30 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-01-14 16:43 glibc 2.35 failures in elf/tst-cpu-features-cpuinfo-static Carlos O'Donell
2022-01-14 17:00 ` Florian Weimer
2022-01-14 18:05 ` H.J. Lu
2022-01-14 18:13 ` Florian Weimer
2022-01-14 21:09 ` Carlos O'Donell
2022-01-14 21:11 ` Florian Weimer
2022-01-14 22:10 ` Carlos O'Donell
2022-01-14 22:23 ` Florian Weimer
2022-01-14 22:30 ` Carlos O'Donell
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