Re: Investigating a reproducibility failure

[Ricardo Wurmus]

Ricardo Wurmus <rekado@elephly.net> writes:

> Konrad Hinsen <konrad.hinsen@fastmail.net> writes:
>
>> Konrad Hinsen <konrad.hinsen@fastmail.net> writes:
>>
>>> To see the failure, do
>>>
>>>    guix time-machine \
>>>     --commit=7357b3d7a52eb5db1674012c50d308d792741c48 \
>>>     -- build openblas
>>>
>>> The build log is attached, the first error is
>>
>> Oops... Two mistakes ! First, I forgot the attachment, so here it comes,
>> Second, I didn't quote the right commit. The failure happens with
>>
>>     guix time-machine \
>>      --commit=87e7faa2ae641d8302efc8b90f1e45f43f67f6da \
>>      -- build openblas
>
> It builds fine on this laptop.
>
> $ lscpu
> Architecture:            x86_64
>   CPU op-mode(s):        32-bit, 64-bit
>   Address sizes:         39 bits physical, 48 bits virtual
>   Byte Order:            Little Endian
> CPU(s):                  4
>   On-line CPU(s) list:   0-3
> Vendor ID:               GenuineIntel
>   Model name:            Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz
>     CPU family:          6
>     Model:               78
>     Thread(s) per core:  2
>     Core(s) per socket:  2
>     Socket(s):           1
>     Stepping:            3
>     CPU max MHz:         3100.0000
>     CPU min MHz:         400.0000
>     BogoMIPS:            5199.98
>     Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
> mca cmov pat pse36 clflush dts acpi mmx fxsr ss
>                          e sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm 
> constant_tsc art arch_perfmon pebs bts rep_good nop
>                          l xtopology nonstop_tsc cpuid aperfmperf pni 
> pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg 
>                          fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe 
> popcnt tsc_deadline_timer aes xsave avx f16c rdra
>                          nd lahf_lm abm 3dnowprefetch cpuid_fault epb 
> invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi
>                           flexpriority ept vpid ept_ad fsgsbase tsc_adjust 
> bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx sm
>                          ap clflushopt intel_pt xsaveopt xsavec xgetbv1 
> xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act
>                          _window hwp_epp md_clear flush_l1d
> Virtualization features: 
>   Virtualization:        VT-x
> Caches (sum of all):     
>   L1d:                   64 KiB (2 instances)
>   L1i:                   64 KiB (2 instances)
>   L2:                    512 KiB (2 instances)
>   L3:                    4 MiB (1 instance)
> NUMA:                    
>   NUMA node(s):          1
>   NUMA node0 CPU(s):     0-3

I also built this on a different machine, foreign distro.  Here’s the
output of lscpu:

--8<---------------cut here---------------start------------->8---
[rwurmus@beast:~] (571) $ lscpu 
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                120
On-line CPU(s) list:   0-119
Thread(s) per core:    2
Core(s) per socket:    15
Socket(s):             4
NUMA node(s):          4
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 62
Model name:            Intel(R) Xeon(R) CPU E7-4870 v2 @ 2.30GHz
Stepping:              7
CPU MHz:               2127.050
CPU max MHz:           2900.0000
CPU min MHz:           1200.0000
BogoMIPS:              4588.44
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              30720K
NUMA node0 CPU(s):     
0,4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100,104,108,112,116
NUMA node1 CPU(s):     
1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61,65,69,73,77,81,85,89,93,97,101,105,109,113,117
NUMA node2 CPU(s):     
2,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,66,70,74,78,82,86,90,94,98,102,106,110,114,118
NUMA node3 CPU(s):     
3,7,11,15,19,23,27,31,35,39,43,47,51,55,59,63,67,71,75,79,83,87,91,95,99,103,107,111,115,119
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 arch_perfmon pebs bts rep_good nopl xtopology 
nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est 
tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt 
tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ssbd ibrs ibpb stibp 
tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt dtherm ida 
arat pln pts md_clear spec_ctrl intel_stibp flush_l1d
--8<---------------cut here---------------end--------------->8---

The output differs, but the build did not fail.

-- 
Ricardo