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Example using "dragon" start method #555

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865aa6c
Permit specification of multiprocessing start methods other than "spa…
applio Aug 18, 2024
cc9bbd4
Modified version of existing example to use "dragon" start method.
applio Aug 18, 2024
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5 changes: 4 additions & 1 deletion cubed/runtime/executors/local.py
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Original file line number Diff line number Diff line change
Expand Up @@ -180,7 +180,10 @@ async def async_execute_dag(
check_runtime_memory(spec, max_workers)
if use_processes:
max_tasks_per_child = kwargs.pop("max_tasks_per_child", None)
context = multiprocessing.get_context("spawn")
if isinstance(use_processes, str):
context = multiprocessing.get_context(use_processes)
else:
context = multiprocessing.get_context("spawn")
# max_tasks_per_child is only supported from Python 3.11
if max_tasks_per_child is None:
concurrent_executor = ProcessPoolExecutor(
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18 changes: 15 additions & 3 deletions examples/matmul-random.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import dragon
import logging

import cubed
Expand All @@ -11,9 +12,9 @@
logging.getLogger("urllib3.connectionpool").setLevel(logging.ERROR)

if __name__ == "__main__":
# 200MB chunks
a = cubed.random.random((50000, 50000), chunks=(5000, 5000))
b = cubed.random.random((50000, 50000), chunks=(5000, 5000))
# 250KB chunks tested on a smaller machine
a = cubed.random.random((5000, 5000), chunks=(500, 500))
b = cubed.random.random((5000, 5000), chunks=(500, 500))
c = xp.astype(a, xp.float32)
d = xp.astype(b, xp.float32)
e = xp.matmul(c, d)
Expand All @@ -26,4 +27,15 @@
e,
store=None,
callbacks=[progress, hist, timeline_viz],
use_processes="dragon",
)

# Example output:
# (dragon311v09) tantalum:~/cray/cubed/examples$ dragon -s matmul-random.py
# create-arrays 5/5 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100.0% 0:00:00
# op-007 astype 100/100 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100.0% 0:00:00
# op-008 astype 100/100 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100.0% 0:00:00
# op-009 matmul 1000/1000 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100.0% 0:00:05
# op-010 matmul 300/300 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100.0% 0:00:02
# op-013 to_zarr 100/100 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100.0% 0:00:00
# +++ head proc exited, code 0
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