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# --------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for license information.
# --------------------------------------------------------------------------------------------
import os
import psutil
import threading
import time
from logger import get_base_logger
class ProcessMonitor:
def __init__(self, log_filename, logger_name, log_interval=5.0, print_console=False, process_id=None, **kwargs):
"""
Process Monitor monitors the CPU usage, memory usage of a specific process.
:param logger_filename: The log filename for the logger.
:param logger_name: The name for the logger.
:param log_interval: The interval of logging.
:param print_console: Whether output log content to console. Default is False.
:param process_id: The process id of the process if monitor, if this is set None, then it will monitor
the process that the ProcessMonitor is running in.
"""
self._monitor_thread = None
self._logger = get_base_logger(
log_filename=log_filename, logger_name=logger_name, print_console=print_console, **kwargs
)
self._pid = process_id or os.getpid()
self._process_instance = psutil.Process(self._pid)
self._log_interval = log_interval
self.running = False
def __enter__(self):
print("Process monitor start working.")
self.start()
return self
def __exit__(self, *args):
self.stop()
print("Process monitor stop working.")
def _monitor_work(self):
while self.running:
log_content = "process status: %s, process cpu usage percent: %s, process memory usage percent: %.3f"
self._logger.info(
log_content,
self._process_instance.status(),
self._process_instance.cpu_percent(),
self._process_instance.memory_percent(),
)
time.sleep(self._log_interval)
@property
def memory_usage_percent(self):
return self._process_instance.memory_percent() * 100
@property
def cpu_usage_percent(self):
return self._process_instance.cpu_percent()
def start(self):
self.running = True
self._monitor_thread = threading.Thread(target=self._monitor_work, daemon=True)
self._monitor_thread.start()
self._logger.info("Start monitoring process id: %d", self._pid)
def stop(self):
self.running = False
self._monitor_thread.join()
self._logger.ino("Stop monitoring process id: %d", self._pid)
self._monitor_thread = None
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