mfakto: an OpenCL program for Mersenne prefactoring

[Ethan (EO)]

I'm getting missed factors from cl_barrett15_*_gs on Radeon VII with mfakto 0.15pre8 (on linux).
0.14 st and st2 complete without error on the same machine. Let me know if any information other than what I'm including below is helpful.

Self-test statistics                                      
  number of tests           335250
  successful tests          331150
  no factor found           4100

self-test FAILED!

mfakto# cat mfakto_radeonVII_st2.log | grep failed | grep barrett15 | wc
   4100   24600  244885

ERROR: self-test failed for M60008387 (cl_barrett15_71_gs)
ERROR: self-test failed for M60008387 (cl_barrett15_70_gs)
ERROR: self-test failed for M60008387 (cl_barrett15_69_gs)
ERROR: self-test failed for M60008387 (cl_barrett15_73_gs)
ERROR: self-test failed for M60005497 (cl_barrett15_74_gs)
ERROR: self-test failed for M60005497 (cl_barrett15_71_gs)
ERROR: self-test failed for M60005497 (cl_barrett15_70_gs)
ERROR: self-test failed for M60005497 (cl_barrett15_69_gs)
ERROR: self-test failed for M60005497 (cl_barrett15_73_gs)
ERROR: self-test failed for M332193203 (cl_barrett15_74_gs)
ERROR: self-test failed for M332193203 (cl_barrett15_71_gs)
ERROR: self-test failed for M332193203 (cl_barrett15_70_gs)
ERROR: self-test failed for M332193203 (cl_barrett15_69_gs)
ERROR: self-test failed for M332193203 (cl_barrett15_73_gs)
ERROR: self-test failed for M800007823 (cl_barrett15_74_gs)
ERROR: self-test failed for M800007823 (cl_barrett15_71_gs)
ERROR: self-test failed for M800007823 (cl_barrett15_70_gs)
ERROR: self-test failed for M800007823 (cl_barrett15_69_gs)
ERROR: self-test failed for M800007823 (cl_barrett15_73_gs)
ERROR: self-test failed for M800005699 (cl_barrett15_74_gs)
ERROR: self-test failed for M800005699 (cl_barrett15_71_gs)
ERROR: self-test failed for M800005699 (cl_barrett15_70_gs)
ERROR: self-test failed for M800005699 (cl_barrett15_69_gs)
ERROR: self-test failed for M800005699 (cl_barrett15_73_gs)
ERROR: self-test failed for M800003137 (cl_barrett15_74_gs)
ERROR: self-test failed for M800003137 (cl_barrett15_71_gs)
ERROR: self-test failed for M800003137 (cl_barrett15_70_gs)
ERROR: self-test failed for M800003137 (cl_barrett15_69_gs)
ERROR: self-test failed for M800003137 (cl_barrett15_73_gs)
ERROR: self-test failed for M800002757 (cl_barrett15_74_gs)
ERROR: self-test failed for M800002757 (cl_barrett15_71_gs)
ERROR: self-test failed for M800002757 (cl_barrett15_70_gs)
ERROR: self-test failed for M800002757 (cl_barrett15_69_gs)
ERROR: self-test failed for M800002757 (cl_barrett15_73_gs)
[snipped]

mfakto 0.15pre8 (64-bit build)


Runtime options
  INI file                  mfakto.ini
  Verbosity                 3
  SieveOnGPU                yes
  MoreClasses               yes
  GPUSievePrimes            81157
  GPUSieveProcessSize       24 Kib
WARNING: GPUSieveSize=128M must be a multiple of GPUSieveProcessSize=24k, adjusting GPUSieveSize to 126M
  GPUSieveSize              126 Mib
  FlushInterval             0
  WorkFile                  worktodo.txt
  ResultsFile               results.txt
  Checkpoints               enabled
  CheckpointDelay           300 s
  Stages                    enabled
  StopAfterFactor           class
  PrintMode                 compact
  V5UserID                  EO
  ComputerID                Highland2017
  ProgressHeader            "Date    Time | class   Pct |   time     ETA | GHz-d/day    Sieve     Wait"
  ProgressFormat            "%d %T | %C %p%% | %t  %e |   %g  %s  %W%%"
  TimeStampInResults        yes
  VectorSize                2
  GPUType                   AUTO
  SmallExp                  no
  UseBinfile                mfakto_Kernels.elf
Compile-time options

Select device - Get device info:
Device 1/1: gfx906 (Advanced Micro Devices, Inc.),
device version: OpenCL 2.0 AMD-APP (3180.7), driver version: 3180.7 (PAL,HSAIL)
Extensions: cl_khr_fp64 cl_amd_fp64 cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_int64_base_atomics cl_
khr_int64_extended_atomics cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_fp16 cl_khr_gl_sharing cl_khr_gl_depth_images cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_o
ps cl_amd_media_ops2 cl_amd_popcnt cl_khr_image2d_from_buffer cl_khr_subgroups cl_khr_gl_event cl_khr_depth_images cl_khr_mipmap_image cl_khr_mipmap_image_writes cl_amd_copy_buffer_p2p 
Global memory:17163091968, Global memory cache: 16384, local memory: 65536, workgroup size: 256, Work dimensions: 3[1024, 1024, 1024, 0, 0] , Max clock speed:1800, compute units:60

OpenCL device info
  name                      gfx906 (Advanced Micro Devices, Inc.)
  device (driver) version   OpenCL 2.0 AMD-APP (3180.7) (3180.7 (PAL,HSAIL))
  maximum threads per block 1024
  maximum threads per grid  1073741824
  number of multiprocessors 60 (3840 compute elements)
  clock rate                1800 MHz

Automatic parameters
  threads per grid          0
  optimizing kernels for    GCNF

Loading binary kernel file mfakto_Kernels.elf
Compiling kernels (build options: "-I. -DVECTOR_SIZE=2 -DGCNF -O3 -DMORE_CLASSES -DCL_GPU_SIEVE"). 
	BUILD OUTPUT

 	END OF BUILD OUTPUT

  GPUSievePrimes (adjusted) 81206
  GPUsieve minimum exponent 1037054

[ixfd64]

Anyone know if mfakto works with Intel Arc GPUs in its current state?