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import logging
import os
import queue
import re
import subprocess
import threading
import time
from dataclasses import dataclass
from datetime import datetime
from typing import List, Optional, Tuple
import psutil
import yaml
from sglang.utils import wait_for_http_ready
@dataclass
class ServerConfig:
command: str
process_names: List[str]
default_port: int
@dataclass
class TaskConfig:
server_cmd: str
client_cmd: str
name: Optional[str] = None
server_type: Optional[str] = None
@dataclass
class TaskResult:
name: str
success: bool
output: str
runtime: float
timestamp: str
SERVER_DEFAULTS = {
"sglang": ServerConfig(
command="sglang.launch_server",
process_names=["sglang.launch_server"],
default_port=30000,
),
"vllm": ServerConfig(
command="vllm.entrypoints.openai.api_server",
process_names=["vllm.entrypoints.openai.api_server"],
default_port=8000,
),
}
def parse_key_info(output: str) -> str:
"""Extract and format key information from the output"""
key_info = []
# Extract Args namespace
args_match = re.search(r"Namespace\(.*?\)", output, re.DOTALL)
if args_match:
key_info.append(args_match.group(0))
# Extract input/output token counts
token_matches = re.findall(r"#(Input|Output) tokens: \d+", output)
key_info.extend(token_matches)
# Extract benchmark result section
result_match = re.search(
r"============ Serving Benchmark Result ============.*?={50,}",
output,
re.DOTALL,
)
if result_match:
key_info.append(result_match.group(0))
return "\n\n".join(key_info)
def extract_port_from_command(cmd: str, server_type: str) -> int:
port_match = re.search(r"--port[= ](\d+)", cmd)
if port_match:
return int(port_match.group(1))
return SERVER_DEFAULTS.get(server_type, ServerConfig("", [], 8000)).default_port
def detect_server_type(cmd: str) -> str:
for server_type, config in SERVER_DEFAULTS.items():
if config.command in cmd:
return server_type
return "unknown"
def stream_output(
process: subprocess.Popen, prefix: str, logger: logging.Logger
) -> queue.Queue:
output_queue = queue.Queue()
def stream_pipe(pipe, prefix):
for line in iter(pipe.readline, ""):
if prefix == "CLIENT":
output_queue.put(line.rstrip())
logger.debug(f"{prefix} | {line.rstrip()}")
stdout_thread = threading.Thread(
target=stream_pipe, args=(process.stdout, prefix), daemon=True
)
stderr_thread = threading.Thread(
target=stream_pipe, args=(process.stderr, prefix), daemon=True
)
stdout_thread.start()
stderr_thread.start()
return output_queue, (stdout_thread, stderr_thread)
class ProcessManager:
def __init__(self):
self.server_process: Optional[subprocess.Popen] = None
self.client_process: Optional[subprocess.Popen] = None
self.logger = logging.getLogger(__name__)
def start_process(
self, command: str, prefix: str
) -> Tuple[subprocess.Popen, queue.Queue]:
process = subprocess.Popen(
command,
shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True,
bufsize=1,
)
output_queue, threads = stream_output(process, prefix, self.logger)
return process, output_queue, threads
def kill_process_tree(self, process: subprocess.Popen):
try:
parent = psutil.Process(process.pid)
children = parent.children(recursive=True)
for child in children:
try:
child.kill()
except psutil.NoSuchProcess:
pass
parent.kill()
gone, alive = psutil.wait_procs(children + [parent], timeout=3)
for p in alive:
try:
p.kill()
except psutil.NoSuchProcess:
pass
except psutil.NoSuchProcess:
pass
def cleanup(self, process_names: List[str]):
if self.client_process:
self.kill_process_tree(self.client_process)
self.client_process = None
if self.server_process:
self.kill_process_tree(self.server_process)
self.server_process = None
for proc in psutil.process_iter(["pid", "name", "cmdline"]):
try:
cmdline = " ".join(proc.cmdline())
if any(name in cmdline for name in process_names):
proc.kill()
except (psutil.NoSuchProcess, psutil.AccessDenied):
continue
class ExperimentRunner:
def __init__(self):
self.process_manager = ProcessManager()
self.logger = logging.getLogger(__name__)
def wait_for_server(
self, port: int, timeout: int = 300, process: Optional[subprocess.Popen] = None
) -> bool:
try:
wait_for_http_ready(
url=f"http://localhost:{port}/health",
timeout=timeout,
process=process,
)
self.logger.debug(f"Server ready on port {port}")
return True
except (RuntimeError, TimeoutError) as e:
self.logger.error("Server failed to become ready: %s", e)
return False
def run_task(self, config: TaskConfig) -> TaskResult:
start_time = time.perf_counter()
client_output = []
try:
if not config.server_type:
config.server_type = detect_server_type(config.server_cmd)
server_config = SERVER_DEFAULTS.get(config.server_type)
if not server_config:
raise ValueError(f"Unknown server type: {config.server_type}")
port = extract_port_from_command(config.server_cmd, config.server_type)
self.process_manager.cleanup(server_config.process_names)
self.logger.debug(f"Starting server: {config.name}")
self.process_manager.server_process, _, server_threads = (
self.process_manager.start_process(config.server_cmd, "SERVER")
)
if not self.wait_for_server(
port, process=self.process_manager.server_process
):
raise TimeoutError("Server startup timeout")
time.sleep(10)
self.logger.debug("Starting client")
self.process_manager.client_process, output_queue, client_threads = (
self.process_manager.start_process(config.client_cmd, "CLIENT")
)
returncode = self.process_manager.client_process.wait()
while True:
try:
line = output_queue.get_nowait()
client_output.append(line)
except queue.Empty:
break
if returncode != 0:
raise RuntimeError(f"Client failed with code {returncode}")
# Parse and format the output
full_output = "\n".join(client_output)
formatted_output = parse_key_info(full_output)
return TaskResult(
name=config.name,
success=True,
output=formatted_output,
runtime=time.perf_counter() - start_time,
timestamp=datetime.now().isoformat(),
)
except Exception as e:
return TaskResult(
name=config.name,
success=False,
output=str(e),
runtime=time.perf_counter() - start_time,
timestamp=datetime.now().isoformat(),
)
finally:
if config.server_type in SERVER_DEFAULTS:
self.process_manager.cleanup(
SERVER_DEFAULTS[config.server_type].process_names
)
time.sleep(10)
def load_config(config_path: str) -> List[TaskConfig]:
with open(config_path, "r") as f:
config_data = yaml.safe_load(f)
configs = []
for idx, entry in enumerate(config_data.get("tasks", [])):
if not isinstance(entry, dict):
raise ValueError(f"Invalid entry at index {idx}")
config = TaskConfig(
server_cmd=entry.get("server_cmd"),
client_cmd=entry.get("client_cmd"),
name=entry.get("name", f"task-{idx+1}"),
server_type=entry.get("server_type"),
)
if not config.server_cmd or not config.client_cmd:
raise ValueError(f"Missing commands in {config.name}")
configs.append(config)
return configs
def setup_logging(debug: bool = False):
level = logging.DEBUG if debug else logging.INFO
logging.basicConfig(
level=level,
format="%(asctime)s - %(levelname)s - %(message)s",
handlers=[logging.StreamHandler(), logging.FileHandler("experiment.log")],
)
def format_results(results: List[TaskResult]) -> str:
"""Format experiment results in Markdown for GitHub step summary."""
output = ["# Experiment Results\n"]
for result in results:
output.append(f"## {result.name}")
output.append(f"**Status**: {'✅ Success' if result.success else '❌ Failed'}")
output.append(f"**Runtime**: {result.runtime:.2f} seconds")
output.append(f"**Timestamp**: {result.timestamp}")
output.append("\n**Output**:\n```")
output.append(result.output)
output.append("```\n")
return "\n".join(output)
def get_bool_env_var(name: str, default: str = "false") -> bool:
value = os.getenv(name, default)
return value.lower() in ("true", "1")
def write_in_github_step_summary(results: List[TaskResult]):
"""Write formatted results to GitHub step summary."""
if not os.environ.get("GITHUB_STEP_SUMMARY"):
logging.warning("GITHUB_STEP_SUMMARY environment variable not set")
return
formatted_content = format_results(results)
with open(os.environ["GITHUB_STEP_SUMMARY"], "a") as f:
f.write(formatted_content)
def main():
parser = argparse.ArgumentParser(description="Experiment Runner")
parser.add_argument(
"--config", type=str, required=True, help="Path to YAML config file"
)
parser.add_argument("--debug", action="store_true", help="Enable debug output")
args = parser.parse_args()
setup_logging(args.debug)
logger = logging.getLogger(__name__)
results = []
try:
configs = load_config(args.config)
runner = ExperimentRunner()
for config in configs:
logger.info(f"Running {config.name}")
result = runner.run_task(config)
results.append(result)
if get_bool_env_var("SGLANG_IS_IN_CI"):
write_in_github_step_summary(results)
except Exception as e:
logger.error(f"Error: {e}")
raise
if __name__ == "__main__":
main()
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