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This commit is contained in:
Peter Boyle 2023-03-28 08:34:24 -07:00
parent 900e01f49b
commit 71c6960eea
1 changed files with 3 additions and 6 deletions
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9
Grid/lattice/Lattice_reduction_gpu.h
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@ -211,12 +211,9 @@ inline typename vobj::scalar_objectD sumD_gpu_small(const vobj *lat, Integer osi
assert(ok);
Integer smemSize = numThreads * sizeof(sobj);
// UVM seems to be buggy under later CUDA drivers
// This fails on A100 and driver 5.30.02 / CUDA 12.1
// Fails with multiple NVCC versions back to 11.4,
// which worked with earlier drivers.
// Not sure which driver had first fail and this bears checking
// Is awkward as must install multiple driver versions
// Move out of UVM
// Turns out I had messed up the synchronise after move to compute stream
// as running this on the default stream fools the synchronise
#undef UVM_BLOCK_BUFFER
#ifndef UVM_BLOCK_BUFFER
commVector<sobj> buffer(numBlocks);