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[Metal] Reduce number of threads for reduction layers #8206

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Jun 10, 2021
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[Metal] Reduce number of threads for reduction layers #8206

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2 changes: 1 addition & 1 deletion include/tvm/topi/cuda/reduction.h
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Expand Up @@ -70,7 +70,7 @@ Schedule ScheduleReduce(const Target& target, Operation op, Schedule sch,
if (out_stage->op.as<ComputeOpNode>()->axis.size() > 0) {
all_reduce = false;
num_thread = 32;
if (target->kind->name == "opencl") {
if (target->kind->name == "opencl" || target->kind->name == "metal") {
// Without this, CL_INVALID_WORK_GROUP_SIZE occurs with python tests.
// Don't know why.
num_thread = 16;
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2 changes: 1 addition & 1 deletion python/tvm/topi/cuda/reduction.py
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Expand Up @@ -37,7 +37,7 @@ def _schedule_reduce(op, sch, is_idx_reduce=False):
all_reduce = False
num_thread = 32
target = tvm.target.Target.current()
if target and target.kind.name == "opencl":
if target and (target.kind.name == "opencl" or target.kind.name == "metal"):
# without it, CL_INVALID_WORK_GROUP_SIZE occurred when running test_topi_reduce.py
# don't know why
num_thread = 16
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