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sglang/sgl-router/py_test/integration/load_balancing/test_random.py

34 lines
983 B
Python

import collections
import math
import pytest
import requests
@pytest.mark.integration
def test_random_distribution(mock_workers, router_manager):
procs, urls, ids = mock_workers(n=4)
rh = router_manager.start_router(worker_urls=urls, policy="random")
counts = collections.Counter()
N = 200
with requests.Session() as s:
for i in range(N):
r = s.post(
f"{rh.url}/v1/completions",
json={
"model": "test-model",
"prompt": f"p{i}",
"max_tokens": 1,
"stream": False,
},
)
assert r.status_code == 200
wid = r.headers.get("X-Worker-Id") or r.json().get("worker_id")
counts[wid] += 1
# simple statistical tolerance: each worker should be within ±50% of mean
mean = N / len(ids)
for wid in ids:
assert 0.5 * mean <= counts[wid] <= 1.5 * mean, counts