Python psutil 模塊在遍歷 Windows 上的進程時使用過多的 cpu

Question

我一直在嘗試創建一個監視器來了解哪個進程使用 cpu 最多以及總體 cpu 使用情況我需要它每秒刷新一次信息，為此我一直在使用 psutil 但是當我使用下一塊Windows 上的代碼它使用了我的 CPU 的 8%，而在 Linux 上它幾乎沒有使用我認為 8% 太多了，Window 的任務管理器甚至不使用 2%，它顯示了很多信息，有什么我可以做的怎么做才能降低cpu使用率？

import time
import psutil


while True:
    ini_proc_cpu_usage = []  # Stores initial cpu usage per process
    last_proc_cpu_usage = []  # Stores last cpu usage per process
    process_name = []  # Processes name
    process_index = 0  # Keeps track of index to remove non-existent processes
    # Creates new list with all the current running processes
    procs = [process for process in psutil.process_iter()]

    # First request to get overall cpu usage
    psutil.cpu_percent(0)

    # First request to get cpu usage per process
    for p in procs[:]:
        # Condition for windows platform to ignore
        # System Idle Process from processes
        if not p.name() == "System Idle Process":
            try:
                # Appends cpu usage per process
                ini_proc_cpu_usage.append(p.cpu_percent(0))
            # Exception if the process doesn't exist anymore
            except (psutil.NoSuchProcess, psutil.ZombieProcess):
                procs.remove(p)  # Removes process from list
                continue
            # Exception for access denied due to user privileges
            except psutil.AccessDenied:
                procs.remove(p)
                pass

    time.sleep(1)  # Time nedeed tu get more accurate info

    # Second request to get overall cpu usage
    last_cpu_usage = psutil.cpu_percent(0)

    # Second request to get top io process info
    for p in procs[:]:
        # Condition for windows platform to ignore
        # System Idle Process from processes
        if not p.name() == "System Idle Process":
            try:
                # Oneshot makes info request quicker
                with p.oneshot():
                    # Creates list with io information for the second time
                    last_proc_cpu_usage.append(p.cpu_percent(0))
                    process_name.append(p.name())  # Gets process name
                    process_index += 1  # Counter for getting index
            # Exception if the process doesn't exist anymore
            except (psutil.NoSuchProcess, psutil.ZombieProcess):
                procs.remove(p)  # Removes process from list
                # Removes process from ini_proc_cpu_usage as well
                ini_proc_cpu_usage.pop(process_index)
                continue
            # Exception for access denied due to user privileges
            except psutil.AccessDenied:
                procs.remove(p)
                pass

    # Gets cpu usage in percentage
    cpu_percent = str(round(last_cpu_usage))

    # Gets top process index this is useful to get process name
    top_process_index = last_proc_cpu_usage.index(max(last_proc_cpu_usage))
    # Converts average top cpu usage into percent
    top_cpu_percent = max(last_proc_cpu_usage)
    top_cpu_percent = top_cpu_percent / psutil.cpu_count()
    top_cpu_percent = f"{top_cpu_percent:.1f}"
    # Gets process name
    top_process_name = process_name[top_process_index]

    print(f"{cpu_percent}%, {top_process_name}: {top_cpu_percent}%")

Answer 1

萬一其他人遇到這個問題，我發現只是通過運行腳本作為管理員解決了它，現在 psutil 幾乎不使用我的 cpu。