improve gpu detection functions and logging in model server

backend/model_server/constants.py

@@ -28,3 +28,9 @@ class EmbeddingModelTextType:
     @staticmethod
     def get_type(provider: EmbeddingProvider, text_type: EmbedTextType) -> str:
         return EmbeddingModelTextType.PROVIDER_TEXT_TYPE_MAP[provider][text_type]
+
+
+class GPUStatus:
+    CUDA = "cuda"
+    MAC_MPS = "mps"
+    NONE = "none"

backend/model_server/encoders.py

@@ -12,6 +12,7 @@ import voyageai  # type: ignore
 from cohere import AsyncClient as CohereAsyncClient
 from fastapi import APIRouter
 from fastapi import HTTPException
+from fastapi import Request
 from google.oauth2 import service_account  # type: ignore
 from litellm import aembedding
 from litellm.exceptions import RateLimitError
@@ -320,6 +321,7 @@ async def embed_text(
     prefix: str | None,
     api_url: str | None,
     api_version: str | None,
+    gpu_type: str = "UNKNOWN",
 ) -> list[Embedding]:
     if not all(texts):
         logger.error("Empty strings provided for embedding")
@@ -373,8 +375,11 @@ async def embed_text(
 
         elapsed = time.monotonic() - start
         logger.info(
-            f"Successfully embedded {len(texts)} texts with {total_chars} total characters "
-            f"with provider {provider_type} in {elapsed:.2f}"
+            f"event=embedding_provider "
+            f"texts={len(texts)} "
+            f"chars={total_chars} "
+            f"provider={provider_type} "
+            f"elapsed={elapsed:.2f}"
         )
     elif model_name is not None:
         logger.info(
@@ -403,6 +408,14 @@ async def embed_text(
             f"Successfully embedded {len(texts)} texts with {total_chars} total characters "
             f"with local model {model_name} in {elapsed:.2f}"
         )
+        logger.info(
+            f"event=embedding_model "
+            f"texts={len(texts)} "
+            f"chars={total_chars} "
+            f"model={provider_type} "
+            f"gpu={gpu_type} "
+            f"elapsed={elapsed:.2f}"
+        )
     else:
         logger.error("Neither model name nor provider specified for embedding")
         raise ValueError(
@@ -455,8 +468,15 @@ async def litellm_rerank(
 
 
 @router.post("/bi-encoder-embed")
-async def process_embed_request(
+async def route_bi_encoder_embed(
+    request: Request,
     embed_request: EmbedRequest,
+) -> EmbedResponse:
+    return await process_embed_request(embed_request, request.app.state.gpu_type)
+
+
+async def process_embed_request(
+    embed_request: EmbedRequest, gpu_type: str = "UNKNOWN"
 ) -> EmbedResponse:
     if not embed_request.texts:
         raise HTTPException(status_code=400, detail="No texts to be embedded")
@@ -484,6 +504,7 @@ async def process_embed_request(
             api_url=embed_request.api_url,
             api_version=embed_request.api_version,
             prefix=prefix,
+            gpu_type=gpu_type,
         )
         return EmbedResponse(embeddings=embeddings)
     except RateLimitError as e:

backend/model_server/main.py

@@ -16,6 +16,7 @@ from model_server.custom_models import router as custom_models_router
 from model_server.custom_models import warm_up_intent_model
 from model_server.encoders import router as encoders_router
 from model_server.management_endpoints import router as management_router
+from model_server.utils import get_gpu_type
 from onyx import __version__
 from onyx.utils.logger import setup_logger
 from shared_configs.configs import INDEXING_ONLY
@@ -58,12 +59,10 @@ def _move_files_recursively(source: Path, dest: Path, overwrite: bool = False) -
 
 @asynccontextmanager
 async def lifespan(app: FastAPI) -> AsyncGenerator:
-    if torch.cuda.is_available():
-        logger.notice("CUDA GPU is available")
-    elif torch.backends.mps.is_available():
-        logger.notice("Mac MPS is available")
-    else:
-        logger.notice("GPU is not available, using CPU")
+    gpu_type = get_gpu_type()
+    logger.notice(f"gpu_type={gpu_type}")
+
+    app.state.gpu_type = gpu_type
 
     if TEMP_HF_CACHE_PATH.is_dir():
         logger.notice("Moving contents of temp_huggingface to huggingface cache.")

backend/model_server/management_endpoints.py

@@ -1,7 +1,9 @@
-import torch
 from fastapi import APIRouter
 from fastapi import Response
 
+from model_server.constants import GPUStatus
+from model_server.utils import get_gpu_type
+
 router = APIRouter(prefix="/api")
 
 
@@ -11,10 +13,7 @@ async def healthcheck() -> Response:
 
 
 @router.get("/gpu-status")
-async def gpu_status() -> dict[str, bool | str]:
-    if torch.cuda.is_available():
-        return {"gpu_available": True, "type": "cuda"}
-    elif torch.backends.mps.is_available():
-        return {"gpu_available": True, "type": "mps"}
-    else:
-        return {"gpu_available": False, "type": "none"}
+async def route_gpu_status() -> dict[str, bool | str]:
+    gpu_type = get_gpu_type()
+    gpu_available = gpu_type != GPUStatus.NONE
+    return {"gpu_available": gpu_available, "type": gpu_type}

backend/model_server/utils.py

@@ -8,6 +8,9 @@ from typing import Any
 from typing import cast
 from typing import TypeVar
 
+import torch
+
+from model_server.constants import GPUStatus
 from onyx.utils.logger import setup_logger
 
 logger = setup_logger()
@@ -58,3 +61,12 @@ def simple_log_function_time(
             return cast(F, wrapped_sync_func)
 
     return decorator
+
+
+def get_gpu_type() -> str:
+    if torch.cuda.is_available():
+        return GPUStatus.CUDA
+    if torch.backends.mps.is_available():
+        return GPUStatus.MAC_MPS
+
+    return GPUStatus.NONE