Bug 99539

Summary:	Make LAMMPS OpenCL GPU support work on Clover and RadeonSI
Product:	Mesa	Reporter:	Vedran Miletić <vedran>
Component:	Drivers/Gallium/radeonsi	Assignee:	Vedran Miletić <vedran>
Status:	RESOLVED FIXED	QA Contact:	Vedran Miletić <vedran>
Severity:	normal
Priority:	medium
Version:	git
Hardware:	Other
OS:	All
URL:	http://lammps.sandia.gov/
Whiteboard:
i915 platform:		i915 features:
Bug Depends on:
Bug Blocks:	99553

Description Vedran Miletić 2017-01-25 19:32:48 UTC

LAMMPS is a popular molecular dynamics software that provides GPU acceleration using OpenCL: http://lammps.sandia.gov/doc/accelerate_gpu.html

Right now running fails with:

--------------------------------------------------------------------------
- Using acceleration for lj/cut:
-  with 1 proc(s) per device.
-  with OpenCL Parameters for: AMD Cypress
--------------------------------------------------------------------------
Device 0: AMD HAWAII (DRM 2.48.0 / 4.9.5-200.fc25.x86_64, LLVM 5.0.0), 44 CUs, 16 GB, 0.93 GHZ (Mixed Precision)
--------------------------------------------------------------------------

Initializing Device and compiling on process 0...Done.
Initializing Device 0 on core 0...Done.

Setting up Verlet run ...
  Unit style    : lj
  Current step  : 0
  Time step     : 0.0025
OpenCL error in file 'geryon/ocl_kernel.h' in line 218 : -48.
--------------------------------------------------------------------------
MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD
with errorcode -1.

NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.
You may or may not see output from other processes, depending on
exactly when Open MPI kills them.
--------------------------------------------------------------------------

Comment 1 Vedran Miletić 2017-02-24 19:50:24 UTC

After adding native_recip() like in bug 99764:

$ cd examples/accelerate
$ ../../src/lmp_serial -i in.lj -suffix gpu

$ cd examples/balance
$ ../../src/lmp_serial -i in.balance -suffix gpu

OpenCL kernel compiles fine and both examples run.

Comment 2 Jan Vesely 2017-10-28 14:48:19 UTC

native_recip was added to libclc in r313107

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