[Openmp-commits] [PATCH] D147756: [Libomptarget] Load an image if it is compatible with at least one device

[Ye Luo via Phabricator via Openmp-commits]

ye-luo added a comment.

> Currently, we only load an image if its supported architecture matches all of the devices found.

Cannot understand

On my machine with one gfx906 GPU and one sm_86 GPU. When I build offload to both GPUs.
Neither image supports both GPUs but they are both loaded fine.

  clang++ -fopenmp --offload-arch=gfx906,sm_80 main.cpp
  LIBOMPTARGET_DEBUG=1 ./a.out
  Libomptarget --> Init target library!
  Libomptarget --> Loading RTLs...
  Libomptarget --> Loading library 'libomptarget.rtl.ppc64.nextgen.so'...
  Libomptarget --> Unable to load library 'libomptarget.rtl.ppc64.nextgen.so': libomptarget.rtl.ppc64.nextgen.so: cannot open shared object file: No such file or directory!
  Libomptarget --> Falling back to original plugin...
  Libomptarget --> Loading library 'libomptarget.rtl.ppc64.so'...
  Libomptarget --> Unable to load library 'libomptarget.rtl.ppc64.so': libomptarget.rtl.ppc64.so: cannot open shared object file: No such file or directory!
  Libomptarget --> Loading library 'libomptarget.rtl.x86_64.nextgen.so'...
  Libomptarget --> Successfully loaded library 'libomptarget.rtl.x86_64.nextgen.so'!
  Libomptarget --> Registering RTL libomptarget.rtl.x86_64.nextgen.so supporting 4 devices!
  Libomptarget --> Loading library 'libomptarget.rtl.cuda.nextgen.so'...
  Libomptarget --> Successfully loaded library 'libomptarget.rtl.cuda.nextgen.so'!
  Libomptarget --> Registering RTL libomptarget.rtl.cuda.nextgen.so supporting 1 devices!
  Libomptarget --> Loading library 'libomptarget.rtl.aarch64.nextgen.so'...
  Libomptarget --> Unable to load library 'libomptarget.rtl.aarch64.nextgen.so': libomptarget.rtl.aarch64.nextgen.so: cannot open shared object file: No such file or directory!
  Libomptarget --> Falling back to original plugin...
  Libomptarget --> Loading library 'libomptarget.rtl.aarch64.so'...
  Libomptarget --> Unable to load library 'libomptarget.rtl.aarch64.so': libomptarget.rtl.aarch64.so: cannot open shared object file: No such file or directory!
  Libomptarget --> Loading library 'libomptarget.rtl.ve.nextgen.so'...
  Libomptarget --> Unable to load library 'libomptarget.rtl.ve.nextgen.so': libomptarget.rtl.ve.nextgen.so: cannot open shared object file: No such file or directory!
  Libomptarget --> Falling back to original plugin...
  Libomptarget --> Loading library 'libomptarget.rtl.ve.so'...
  Libomptarget --> Unable to load library 'libomptarget.rtl.ve.so': libomptarget.rtl.ve.so: cannot open shared object file: No such file or directory!
  Libomptarget --> Loading library 'libomptarget.rtl.amdgpu.nextgen.so'...
  Libomptarget --> Successfully loaded library 'libomptarget.rtl.amdgpu.nextgen.so'!
  Libomptarget --> Registering RTL libomptarget.rtl.amdgpu.nextgen.so supporting 1 devices!
  Libomptarget --> Loading library 'libomptarget.rtl.rpc.nextgen.so'...
  Libomptarget --> Unable to load library 'libomptarget.rtl.rpc.nextgen.so': libomptarget.rtl.rpc.nextgen.so: cannot open shared object file: No such file or directory!
  Libomptarget --> Falling back to original plugin...
  Libomptarget --> Loading library 'libomptarget.rtl.rpc.so'...
  Libomptarget --> Unable to load library 'libomptarget.rtl.rpc.so': libomptarget.rtl.rpc.so: cannot open shared object file: No such file or directory!
  Libomptarget --> RTLs loaded!
  Libomptarget --> OMPT: Enter ompt_init
  OMPT --> OMPT: Trying to load library libomp.so
  OMPT --> OMPT: Trying to get address of connection routine ompt_libomp_connect
  OMPT --> OMPT: Library connection handle = 0x7fb8c650f5d0
  Libomptarget --> OMPT: Exit ompt_init
  Libomptarget --> Image 0x00005635224dc0d8 is NOT compatible with RTL !
  PluginInterface --> Image is compatible with current environment: sm_80
  Libomptarget --> Image 0x00005635224dc0d8 is compatible with RTL !
  Libomptarget --> RTL 0x000056352392e0a0 has index 0!
  Libomptarget --> Registering image 0x00005635224dc0d8 with RTL !
  Libomptarget --> Image 0x00005635224fbb80 is NOT compatible with RTL !
  Libomptarget --> Image 0x00005635224fbb80 is NOT compatible with RTL !
  TARGET AMDGPU RTL --> Compatible: Target IDs are compatible 	[Image: gfx906]	:	[Env: gfx906:sramecc+:xnack-]
  PluginInterface --> Image is compatible with current environment: gfx906
  Libomptarget --> Image 0x00005635224fbb80 is compatible with RTL !
  Libomptarget --> RTL 0x0000563523963d40 has index 1!
  Libomptarget --> Registering image 0x00005635224fbb80 with RTL !
  Libomptarget --> Done registering entries!
  Libomptarget --> Entering target region for device -1 with entry point 0x00005635224dc004
  Libomptarget --> Call to omp_get_num_devices returning 2
  Libomptarget --> Default TARGET OFFLOAD policy is now mandatory (devices were found)
  Libomptarget --> Use default device id 0
  Libomptarget --> Call to omp_get_num_devices returning 2
  Libomptarget --> Call to omp_get_num_devices returning 2
  Libomptarget --> Call to omp_get_initial_device returning 2
  Libomptarget --> Checking whether device 0 is ready.
  Libomptarget --> Is the device 0 (local ID 0) initialized? 0
  TARGET CUDA RTL --> The primary context is inactive, set its flags to CU_CTX_SCHED_BLOCKING_SYNC
  Libomptarget --> Device 0 is ready to use.
  PluginInterface --> Load data from image 0x00005635224dc0d8
  PluginInterface --> Succesfully write 16 bytes associated with global symbol '__omp_rtl_device_environment' to the device (0x7fb78be00000 -> 0x7ffd028aec10).
  TARGET CUDA RTL --> Entry point 0x00005635224ff048 maps to __omp_offloading_10307_18c6198_main_l4 (0x000056352458f130)
  PluginInterface --> Global symbol '__omp_offloading_10307_18c6198_main_l4_exec_mode' was found in the ELF image and 1 bytes will copied from 0x5635224fa770 to 0x7ffd028aeaa0.
  PluginInterface --> Entry point 0x0000000000000000 maps to __omp_offloading_10307_18c6198_main_l4 (0x0000563524558980)
  Libomptarget --> loop trip count is 0.
  Libomptarget --> Launching target execution __omp_offloading_10307_18c6198_main_l4 with pointer 0x0000563524558980 (index=0).
  PluginInterface --> Launching kernel __omp_offloading_10307_18c6198_main_l4 with 1 blocks and 128 threads in Generic mode
  Libomptarget --> Unloading target library!
  Libomptarget --> Unregistered image 0x00005635224dc0d8 from RTL 0x000056352392e0a0!
  Libomptarget --> Unregistered image 0x00005635224fbb80 from RTL 0x0000563523963d40!
  Libomptarget --> Done unregistering images!
  Libomptarget --> Removing translation table for descriptor 0x00005635224ff048
  Libomptarget --> Done unregistering library!
  Libomptarget --> Deinit target library!




Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D147756/new/

https://reviews.llvm.org/D147756