top.py 文件源码

def print_header(procs_status, num_procs):
    """Print system-related info, above the process list."""

    def get_dashes(perc):
        dashes = "|" * int((float(perc) / 10 * 4))
        empty_dashes = " " * (40 - len(dashes))
        return dashes, empty_dashes

    # cpu usage
    percs = psutil.cpu_percent(interval=0, percpu=True)
    for cpu_num, perc in enumerate(percs):
        dashes, empty_dashes = get_dashes(perc)
        print_line(" CPU%-2s [%s%s] %5s%%" % (cpu_num, dashes, empty_dashes,
                                              perc))
    mem = psutil.virtual_memory()
    dashes, empty_dashes = get_dashes(mem.percent)
    line = " Mem   [%s%s] %5s%% %6s / %s" % (
        dashes, empty_dashes,
        mem.percent,
        str(int(mem.used / 1024 / 1024)) + "M",
        str(int(mem.total / 1024 / 1024)) + "M"
    )
    print_line(line)

    # swap usage
    swap = psutil.swap_memory()
    dashes, empty_dashes = get_dashes(swap.percent)
    line = " Swap  [%s%s] %5s%% %6s / %s" % (
        dashes, empty_dashes,
        swap.percent,
        str(int(swap.used / 1024 / 1024)) + "M",
        str(int(swap.total / 1024 / 1024)) + "M"
    )
    print_line(line)

    # processes number and status
    st = []
    for x, y in procs_status.items():
        if y:
            st.append("%s=%s" % (x, y))
    st.sort(key=lambda x: x[:3] in ('run', 'sle'), reverse=1)
    print_line(" Processes: %s (%s)" % (num_procs, ', '.join(st)))
    # load average, uptime
    uptime = datetime.datetime.now() - \
             datetime.datetime.fromtimestamp(psutil.boot_time())
    av1, av2, av3 = os.getloadavg()
    line = " Load average: %.2f %.2f %.2f  Uptime: %s" \
           % (av1, av2, av3, str(uptime).split('.')[0])
    print_line(line)