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#### What this does ####
# identifies lowest tpm deployment
import traceback
from datetime import datetime
from typing import Dict, List, Optional, Union
from litellm import token_counter
from litellm._logging import verbose_router_logger
from litellm.caching.caching import DualCache
from litellm.integrations.custom_logger import CustomLogger
from litellm.types.utils import LiteLLMPydanticObjectBase
from litellm.utils import print_verbose
class RoutingArgs(LiteLLMPydanticObjectBase):
ttl: int = 1 * 60 # 1min (RPM/TPM expire key)
class LowestTPMLoggingHandler(CustomLogger):
test_flag: bool = False
logged_success: int = 0
logged_failure: int = 0
default_cache_time_seconds: int = 1 * 60 * 60 # 1 hour
def __init__(
self, router_cache: DualCache, model_list: list, routing_args: dict = {}
):
self.router_cache = router_cache
self.model_list = model_list
self.routing_args = RoutingArgs(**routing_args)
def log_success_event(self, kwargs, response_obj, start_time, end_time):
try:
"""
Update TPM/RPM usage on success
"""
if kwargs["litellm_params"].get("metadata") is None:
pass
else:
model_group = kwargs["litellm_params"]["metadata"].get(
"model_group", None
)
id = kwargs["litellm_params"].get("model_info", {}).get("id", None)
if model_group is None or id is None:
return
elif isinstance(id, int):
id = str(id)
total_tokens = response_obj["usage"]["total_tokens"]
# ------------
# Setup values
# ------------
current_minute = datetime.now().strftime("%H-%M")
tpm_key = f"{model_group}:tpm:{current_minute}"
rpm_key = f"{model_group}:rpm:{current_minute}"
# ------------
# Update usage
# ------------
## TPM
request_count_dict = self.router_cache.get_cache(key=tpm_key) or {}
request_count_dict[id] = request_count_dict.get(id, 0) + total_tokens
self.router_cache.set_cache(
key=tpm_key, value=request_count_dict, ttl=self.routing_args.ttl
)
## RPM
request_count_dict = self.router_cache.get_cache(key=rpm_key) or {}
request_count_dict[id] = request_count_dict.get(id, 0) + 1
self.router_cache.set_cache(
key=rpm_key, value=request_count_dict, ttl=self.routing_args.ttl
)
### TESTING ###
if self.test_flag:
self.logged_success += 1
except Exception as e:
verbose_router_logger.error(
"litellm.router_strategy.lowest_tpm_rpm.py::async_log_success_event(): Exception occured - {}".format(
str(e)
)
)
verbose_router_logger.debug(traceback.format_exc())
pass
async def async_log_success_event(self, kwargs, response_obj, start_time, end_time):
try:
"""
Update TPM/RPM usage on success
"""
if kwargs["litellm_params"].get("metadata") is None:
pass
else:
model_group = kwargs["litellm_params"]["metadata"].get(
"model_group", None
)
id = kwargs["litellm_params"].get("model_info", {}).get("id", None)
if model_group is None or id is None:
return
elif isinstance(id, int):
id = str(id)
total_tokens = response_obj["usage"]["total_tokens"]
# ------------
# Setup values
# ------------
current_minute = datetime.now().strftime("%H-%M")
tpm_key = f"{model_group}:tpm:{current_minute}"
rpm_key = f"{model_group}:rpm:{current_minute}"
# ------------
# Update usage
# ------------
# update cache
## TPM
request_count_dict = (
await self.router_cache.async_get_cache(key=tpm_key) or {}
)
request_count_dict[id] = request_count_dict.get(id, 0) + total_tokens
await self.router_cache.async_set_cache(
key=tpm_key, value=request_count_dict, ttl=self.routing_args.ttl
)
## RPM
request_count_dict = (
await self.router_cache.async_get_cache(key=rpm_key) or {}
)
request_count_dict[id] = request_count_dict.get(id, 0) + 1
await self.router_cache.async_set_cache(
key=rpm_key, value=request_count_dict, ttl=self.routing_args.ttl
)
### TESTING ###
if self.test_flag:
self.logged_success += 1
except Exception as e:
verbose_router_logger.error(
"litellm.router_strategy.lowest_tpm_rpm.py::async_log_success_event(): Exception occured - {}".format(
str(e)
)
)
verbose_router_logger.debug(traceback.format_exc())
pass
def get_available_deployments( # noqa: PLR0915
self,
model_group: str,
healthy_deployments: list,
messages: Optional[List[Dict[str, str]]] = None,
input: Optional[Union[str, List]] = None,
):
"""
Returns a deployment with the lowest TPM/RPM usage.
"""
# get list of potential deployments
verbose_router_logger.debug(
f"get_available_deployments - Usage Based. model_group: {model_group}, healthy_deployments: {healthy_deployments}"
)
current_minute = datetime.now().strftime("%H-%M")
tpm_key = f"{model_group}:tpm:{current_minute}"
rpm_key = f"{model_group}:rpm:{current_minute}"
tpm_dict = self.router_cache.get_cache(key=tpm_key)
rpm_dict = self.router_cache.get_cache(key=rpm_key)
verbose_router_logger.debug(
f"tpm_key={tpm_key}, tpm_dict: {tpm_dict}, rpm_dict: {rpm_dict}"
)
try:
input_tokens = token_counter(messages=messages, text=input)
except Exception:
input_tokens = 0
verbose_router_logger.debug(f"input_tokens={input_tokens}")
# -----------------------
# Find lowest used model
# ----------------------
lowest_tpm = float("inf")
if tpm_dict is None: # base case - none of the deployments have been used
# initialize a tpm dict with {model_id: 0}
tpm_dict = {}
for deployment in healthy_deployments:
tpm_dict[deployment["model_info"]["id"]] = 0
else:
for d in healthy_deployments:
## if healthy deployment not yet used
if d["model_info"]["id"] not in tpm_dict:
tpm_dict[d["model_info"]["id"]] = 0
all_deployments = tpm_dict
deployment = None
for item, item_tpm in all_deployments.items():
## get the item from model list
_deployment = None
for m in healthy_deployments:
if item == m["model_info"]["id"]:
_deployment = m
if _deployment is None:
continue # skip to next one
_deployment_tpm = None
if _deployment_tpm is None:
_deployment_tpm = _deployment.get("tpm")
if _deployment_tpm is None:
_deployment_tpm = _deployment.get("litellm_params", {}).get("tpm")
if _deployment_tpm is None:
_deployment_tpm = _deployment.get("model_info", {}).get("tpm")
if _deployment_tpm is None:
_deployment_tpm = float("inf")
_deployment_rpm = None
if _deployment_rpm is None:
_deployment_rpm = _deployment.get("rpm")
if _deployment_rpm is None:
_deployment_rpm = _deployment.get("litellm_params", {}).get("rpm")
if _deployment_rpm is None:
_deployment_rpm = _deployment.get("model_info", {}).get("rpm")
if _deployment_rpm is None:
_deployment_rpm = float("inf")
if item_tpm + input_tokens > _deployment_tpm:
continue
elif (rpm_dict is not None and item in rpm_dict) and (
rpm_dict[item] + 1 >= _deployment_rpm
):
continue
elif item_tpm < lowest_tpm:
lowest_tpm = item_tpm
deployment = _deployment
print_verbose("returning picked lowest tpm/rpm deployment.")
return deployment
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