[BugFix] Correct OTEL span start time for Dynamo compilation (#40698)

Signed-off-by: emricksini-h <emrick.birivoutin@hcompany.ai> Co-authored-by: Simon Mo <simon.mo@hey.com>
2026-07-13 16:25:03 -07:00
parent 8b8af2caf7
commit fec64fea75
1 changed files with 6 additions and 3 deletions
@@ -1144,16 +1144,19 @@ class VllmBackend:
        compilation_counter.num_graphs_seen += 1
        from .monitor import torch_compile_start_time

-        dynamo_time = time.perf_counter() - torch_compile_start_time
+        current_perf = time.perf_counter()
+        current_epoch = time.time()
+        dynamo_time = current_perf - torch_compile_start_time
        logger.info_once(
            "Dynamo bytecode transform time: %.2f s",
            dynamo_time,
        )

        # Record Dynamo time in tracing if available
-        start_time = int(torch_compile_start_time * 1e9)
+        real_start_time = current_epoch - dynamo_time
+        start_time_ns = int(real_start_time * 1e9)
        attributes = {"dynamo.time_seconds": dynamo_time}
-        instrument_manual("Dynamo bytecode transform", start_time, None, attributes)
+        instrument_manual("Dynamo bytecode transform", start_time_ns, None, attributes)

        # we control the compilation process, each instance can only be
        # called once