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[DNM] Use ProcessPool workers #818

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[DNM] Use ProcessPool workers #818

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11 changes: 11 additions & 0 deletions tests/conftest.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@
import threading
import time
import uuid
from concurrent.futures import ProcessPoolExecutor
from functools import lru_cache

import dask
Expand Down Expand Up @@ -93,6 +94,7 @@ def get_coiled_runtime_version():
{
"coiled.account": "dask-benchmarks",
"distributed.admin.system-monitor.gil.enabled": True,
"distributed.worker.daemon": False,
}
)

Expand Down Expand Up @@ -514,6 +516,15 @@ def small_client(
small_cluster.scale(n_workers)
client.wait_for_workers(n_workers)

# Swap out the default threadpool for a processpool on workers
class ProcessPoolWorkers(WorkerPlugin):
def setup(self, worker):
worker.executors["default"] = ProcessPoolExecutor(
max_workers=worker.state.nthreads
)

client.register_worker_plugin(ProcessPoolWorkers())

with upload_cluster_dump(client):
log_on_scheduler(client, "Finished client setup of %s", test_label)

Expand Down