TEMP working on caplog

Signed-off-by: Luka Govedič <lgovedic@redhat.com>

Author: ProExpertProg

tests/compile/test_full_graph.py

@@ -253,6 +253,7 @@ def test_e2e_fusion_attn_quant(
     custom_ops: str,
     inductor_graph_partition: bool,
     caplog_vllm,
+    caplog_mp_workaround,
     monkeypatch,
 ):
     custom_ops_list = custom_ops.split(",") if custom_ops else []
@@ -268,7 +269,7 @@ def test_e2e_fusion_attn_quant(
     # Otherwise, we can't verify fusion happened through the logs.
     # Log capture also doesn't work with multiprocessing yet.
     monkeypatch.setenv("VLLM_DISABLE_COMPILE_CACHE", "1")
-    monkeypatch.setenv("VLLM_ENABLE_V1_MULTIPROCESSING", "0")
+    # monkeypatch.setenv("VLLM_ENABLE_V1_MULTIPROCESSING", "0")
 
     compilation_config = CompilationConfig(
         # Testing properties
@@ -285,6 +286,7 @@ def test_e2e_fusion_attn_quant(
 
     with (
         caplog_vllm.at_level(logging.DEBUG),
+        caplog_mp_workaround(),
         global_force_attn_backend_context_manager(backend),
     ):
         run_model(compilation_config, model_name, **model_kwargs)
@@ -319,6 +321,7 @@ def custom_ops_product(*custom_ops_lists: list[str]) -> Iterable[str]:
     or not current_platform.has_device_capability((10, 0)),
     reason="allreduce+rmsnorm fusion only supported on blackwell",
 )
+@pytest.mark.skip(reason="Still no solution for capturing logs from subprocess")
 def test_e2e_fusion_tp2_attn_quant_allreduce_rmsnorm(
     model_name,
     model_kwargs,
@@ -341,7 +344,8 @@ def test_e2e_fusion_tp2_attn_quant_allreduce_rmsnorm(
     # Otherwise, we can't verify fusion happened through the logs.
     # Log capture also doesn't work with multiprocessing yet.
     monkeypatch.setenv("VLLM_DISABLE_COMPILE_CACHE", "1")
-    monkeypatch.setenv("VLLM_ENABLE_V1_MULTIPROCESSING", "0")
+    # TODO
+    # monkeypatch.setenv("VLLM_ENABLE_V1_MULTIPROCESSING", "0")
 
     compilation_config = CompilationConfig(
         # Testing properties

tests/conftest.py

@@ -1,10 +1,11 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
-
-# ruff: noqa
+import contextlib
 
 from tblib import pickling_support
 
+# ruff: noqa
+
 # Install support for pickling exceptions so that we can nicely propagate
 # failures from tests running in a subprocess.
 # This should be run before any custom exception subclasses are defined.
@@ -1067,6 +1068,23 @@ def caplog_vllm(temporary_enable_log_propagate, caplog):
     yield caplog
 
 
+@pytest.fixture()
+def caplog_mp_workaround():
+    @contextlib.contextmanager
+    def ctx():
+        import logging.handlers
+        import multiprocessing as mp
+
+        logger_queue: mp.Queue[logging.LogRecord] = mp.Queue()
+        logger = logging.getLogger()
+        logger.addHandler(logging.handlers.QueueHandler(logger_queue))
+        yield
+        while not logger_queue.empty():
+            logger.handle(logger_queue.get())
+
+    return ctx
+
+
 @pytest.fixture(scope="session")
 def num_gpus_available():
     """Get number of GPUs without initializing the CUDA context