SingleQubitGatesTest.CustomGate unit test failed

[wh5a]

Describe the bug /root/intel-qs/unit_test/include/single_qubit_gates_test.hpp:116: Failure Expected equality of these values: psi.GetProbability(0) Which is: 0.56170165848894527 psi.GetProbability(2) Which is: 0.56170165848894749 [ FAILED ] SingleQubitGatesTest.CustomGate (1 ms)

To Reproduce Steps to reproduce the behavior:

1. Build
2. Run utest

Expected behavior All tests pass.

[wh5a]

This only happens with -DIqsNative=ON

[giangiac]

@cangumeli Can you look into this? Thanks!

[jwhogabo]

Hi @wh5a,

I'm trying to reproduce this test failure. The following build configuration passes all tests: CXX=g++ cmake -DIqsNative=ON -DIqsUtest=ON -DIqsMPI=OFF ..

The following configurations end in a segmentation fault: CXX=icc cmake -DIqsNative=ON -DIqsUtest=ON -DIqsMPI=OFF .. bash> bin/utest

CXX=icpc cmake -DIqsNative=ON -DIqsUtest=ON -DIqsMPI=OFF .. bash> bin/utest

CXX=mpiicpc cmake -DIqsNative=ON -DIqsMPI=ON -DIqsUtest=ON .. bash> bin/utest

CXX=mpiicpc cmake -DIqsNative=ON -DIqsMPI=ON -DIqsUtest=ON .. bash> mpirun -n8 -ppn 2 bin/utest

I am unable to reproduce your specific result. Could you post the CMAKE command line you used to generate your build? Also, could you let me know your OS version and compiler version as well?

Thanks!

Justin -=-

[wh5a]

@jwhogabo Thanks for getting back to me. I installed Intel Parallel Studio 2020 on Ubuntu 18.04. This is my CMAKE command: CXX=mpiicpc cmake -DIqsMPI=ON -DIqsUtest=ON -DIqsNative=ON ..

ICC version is 19.1.2.254 20200623.

And here's /proc/cpuinfo for one core, with a total of 8 cores:

processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel Core Processor (Haswell, no TSX) stepping : 1 microcode : 0x1 cpu MHz : 3092.734 cache size : 16384 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 syscall nx rdtscp lm constant_tsc rep_good nopl xtopology cpuid 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 invpcid_single pti fsgsbase bmi1 avx2 smep bmi2 erms invpcid xsaveopt arat bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf bogomips : 6185.46 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management:

Could this be a processor bug?