[python_uwsgi] Initial commit

Author: KowalskiThomas

scenarios/python_uwsgi_3.11/Dockerfile

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+ARG BASE_IMAGE="prof-python-3.11"
+FROM $BASE_IMAGE
+
+# Copy the Python target into the container
+COPY ./scenarios/python_uwsgi_3.11/requirements.txt /app/
+RUN chmod 644 /app/*
+
+# Set the working directory to the location of the program
+WORKDIR /app
+
+RUN pip install -r requirements.txt
+
+COPY ./scenarios/python_uwsgi_3.11/app.py /app/
+COPY ./scenarios/python_uwsgi_3.11/uwsgi.ini /app/
+
+ENV DD_TRACE_ENABLED=false
+ENV DD_TRACE_DEBUG=false
+ENV DD_PROFILING_UPLOAD_INTERVAL=3
+ENV _DD_PROFILING_STACK_ADAPTIVE_SAMPLING_ENABLED=0
+ENV DD_PROFILING_OUTPUT_PPROF="/app/data/profiles"
+
+# Run the program when the container starts
+CMD ["uwsgi", "--ini", "uwsgi.ini"]

scenarios/python_uwsgi_3.11/app.py

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+import os
+import signal
+import time
+from collections.abc import Callable
+from threading import Thread
+
+import requests
+import uwsgi  # pyright: ignore[reportMissingModuleSource]
+from ddtrace.profiling import Profiler
+
+profiler = Profiler()
+profiler.start()
+
+
+def _make_requests() -> None:
+    start = time.monotonic()
+    while time.monotonic() - start < 10.0:
+        try:
+            print(f"Requester PID: {os.getpid()} requesting")
+            requests.get("http://localhost:8000", timeout=1)
+        except Exception as e:  # noqa: PERF203,BLE001
+            print(e)
+
+    time.sleep(1.0)
+
+    # Ask the master process to exit
+    try:
+        os.kill(uwsgi.masterpid(), signal.SIGINT)
+    finally:
+        pass
+
+
+def compute_big_number() -> int:
+    x = 0
+    for i in range(1_000_000):
+        x += i
+    return x
+
+
+def application(environ: dict, start_response: Callable) -> list[bytes]:  # noqa: ARG001
+    x = compute_big_number()
+    start_response("200 OK", [("Content-Type", "text/plain")])
+    return [f"Hello, World! {x}".encode()]
+
+
+Thread(target=_make_requests, daemon=True, name="Requester").start()

scenarios/python_uwsgi_3.11/expected_profile.json

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+{
+  "test_name": "python_uwsgi_3.11",
+  "scale_by_duration": false,
+  "pprof-regex": "",
+  "stacks": [
+    {
+      "profile-type": "wall-time",
+      "pprof-regex": "",
+      "stack-content": [
+        {
+          "regular_expression": ".*_make_requests.*",
+          "percent": 33,
+          "error_margin": 5,
+          "labels": [
+            {
+              "key": "thread name",
+              "values": [
+                "Requester"
+              ]
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "profile-type": "wall-time",
+      "pprof-regex": "",
+      "stack-content": [
+        {
+          "regular_expression": ".*application;compute_big_number.*",
+          "percent": 33,
+          "error_margin": 5
+        }
+      ]
+    }
+  ]
+}

scenarios/python_uwsgi_3.11/requirements.txt

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+ddtrace
+requests
+uwsgi

scenarios/python_uwsgi_3.11/uwsgi.ini

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+[uwsgi]
+worker-reload-mercy = 3
+harakiri = 3
+harakiri-graceful-timeout = 3
+
+module = app:application
+http = 127.0.0.1:8000
+
+master = true
+processes = 3
+
+;; ddtrace required options
+enable-threads = 1
+lazy-apps = 1
+skip-atexit = 1 ; For uwsgi<2.0.30
+import=ddtrace.bootstrap.sitecustomize