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Detect compute-exclusive mode and adjust testing. #2166

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Nov 13, 2023
Merged

Detect compute-exclusive mode and adjust testing. #2166

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39 changes: 21 additions & 18 deletions test/core/cudadrv.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -2,31 +2,34 @@

ctx = current_context()
dev = current_device()
exclusive = attribute(dev, CUDA.DEVICE_ATTRIBUTE_COMPUTE_MODE) == CUDA.CU_COMPUTEMODE_EXCLUSIVE_PROCESS

synchronize(ctx)

let ctx2 = CuContext(dev)
@test ctx2 == current_context() # ctor implicitly pushes
activate(ctx)
@test ctx == current_context()
if !exclusive
let ctx2 = CuContext(dev)
@test ctx2 == current_context() # ctor implicitly pushes
activate(ctx)
@test ctx == current_context()

@test device(ctx2) == dev
@test device(ctx2) == dev

CUDA.unsafe_destroy!(ctx2)
end

let global_ctx2 = nothing
CuContext(dev) do ctx2
@test ctx2 == current_context()
@test ctx != ctx2
global_ctx2 = ctx2
CUDA.unsafe_destroy!(ctx2)
end
@test !CUDA.isvalid(global_ctx2)
@test ctx == current_context()

@test device(ctx) == dev
@test current_device() == dev
device_synchronize()
let global_ctx2 = nothing
CuContext(dev) do ctx2
@test ctx2 == current_context()
@test ctx != ctx2
global_ctx2 = ctx2
end
@test !CUDA.isvalid(global_ctx2)
@test ctx == current_context()

@test device(ctx) == dev
@test current_device() == dev
device_synchronize()
end
end

end
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14 changes: 10 additions & 4 deletions test/runtests.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -123,9 +123,10 @@ function gpu_entry(dev)
id = deviceid(dev)
name = CUDA.name(dev)
uuid = CUDA.uuid(dev)
cap = CUDA.capability(dev)
mig = uuid != CUDA.parent_uuid(dev)
(; id, name, cap, uuid="$(mig ? "MIG" : "GPU")-$uuid")
cap = capability(dev)
mig = uuid != parent_uuid(dev)
compute_mode = attribute(dev, CUDA.DEVICE_ATTRIBUTE_COMPUTE_MODE)
(; id, name, cap, uuid="$(mig ? "MIG" : "GPU")-$uuid", compute_mode)
end
gpus = if do_gpu_list
# parse the list of GPUs
Expand All @@ -135,8 +136,9 @@ gpus = if do_gpu_list
end
else
# find all GPUs
map(gpu_entry, CUDA.devices())
map(gpu_entry, devices())
end
filter!(gpu->gpu.compute_mode != CUDA.CU_COMPUTEMODE_PROHIBITED, gpus)
@info("Testing using device " * join(map(gpu->"$(gpu.id) ($(gpu.name))", gpus), ", ", " and ") *
". To change this, specify the `--gpus` argument to the tests, or set the `CUDA_VISIBLE_DEVICES` environment variable.")
ENV["CUDA_VISIBLE_DEVICES"] = join(map(gpu->gpu.uuid, gpus), ",")
Expand All @@ -148,6 +150,10 @@ if !set_jobs
jobs = min(cpu_jobs, memory_jobs)
end
@info "Running $jobs tests in parallel. If this is too many, specify the `--jobs` argument to the tests, or set the `JULIA_CPU_THREADS` environment variable."
if first(gpus).compute_mode == CUDA.CU_COMPUTEMODE_EXCLUSIVE_PROCESS
@warn "Running tests on a GPU in exclusive mode; reducing parallelism to 1."
jobs = 1
end

# add workers
const test_exeflags = Base.julia_cmd()
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