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#!/usr/bin/env python
# Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
A clone of top / htop.
Author: Giampaolo Rodola' <g.rodola@gmail.com>
"""
import os
import sys
if os.name != 'posix':
sys.exit('platform not supported')
import time
import curses
import atexit
from datetime import datetime, timedelta
import psutil
# --- curses stuff
def tear_down():
win.keypad(0)
curses.nocbreak()
curses.echo()
curses.endwin()
win = curses.initscr()
atexit.register(tear_down)
curses.endwin()
lineno = 0
def print_line(line, highlight=False):
"""A thin wrapper around curses's addstr()."""
global lineno
try:
if highlight:
line += " " * (win.getmaxyx()[1] - len(line))
win.addstr(lineno, 0, line, curses.A_REVERSE)
else:
win.addstr(lineno, 0, line, 0)
except curses.error:
lineno = 0
win.refresh()
raise
else:
lineno += 1
# --- /curses stuff
def bytes2human(n):
"""
>>> bytes2human(10000)
'9K'
>>> bytes2human(100001221)
'95M'
"""
symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
prefix = {}
for i, s in enumerate(symbols):
prefix[s] = 1 << (i+1)*10
for s in reversed(symbols):
if n >= prefix[s]:
value = int(float(n) / prefix[s])
return '%s%s' % (value, s)
return "%sB" % n
def poll(interval):
# sleep some time
time.sleep(interval)
procs = []
procs_status = {}
for p in psutil.process_iter():
try:
p.dict = p.as_dict(['username', 'get_nice', 'get_memory_info',
'get_memory_percent', 'get_cpu_percent',
'get_cpu_times', 'name', 'status'])
try:
procs_status[str(p.dict['status'])] += 1
except KeyError:
procs_status[str(p.dict['status'])] = 1
except psutil.NoSuchProcess:
pass
else:
procs.append(p)
# return processes sorted by CPU percent usage
processes = sorted(procs, key=lambda p: p.dict['cpu_percent'], reverse=True)
return (processes, procs_status)
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
for cpu_num, perc in enumerate(psutil.cpu_percent(interval=0, percpu=True)):
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)
used = mem.total - mem.available
line = " Mem [%s%s] %5s%% %6s/%s" % (
dashes, empty_dashes,
mem.percent,
str(int(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.now() - 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)
def refresh_window(procs, procs_status):
"""Print results on screen by using curses."""
curses.endwin()
templ = "%-6s %-8s %4s %5s %5s %6s %4s %9s %2s"
win.erase()
header = templ % ("PID", "USER", "NI", "VIRT", "RES", "CPU%", "MEM%",
"TIME+", "NAME")
print_header(procs_status, len(procs))
print_line("")
print_line(header, highlight=True)
for p in procs:
# TIME+ column shows process CPU cumulative time and it
# is expressed as: "mm:ss.ms"
if p.dict['cpu_times'] != None:
ctime = timedelta(seconds=sum(p.dict['cpu_times']))
ctime = "%s:%s.%s" % (ctime.seconds // 60 % 60,
str((ctime.seconds % 60)).zfill(2),
str(ctime.microseconds)[:2])
else:
ctime = ''
if p.dict['memory_percent'] is not None:
p.dict['memory_percent'] = round(p.dict['memory_percent'], 1)
else:
p.dict['memory_percent'] = ''
if p.dict['cpu_percent'] is None:
p.dict['cpu_percent'] = ''
if p.dict['username']:
username = p.dict['username'][:8]
else:
username = ""
line = templ % (p.pid,
username,
p.dict['nice'],
bytes2human(getattr(p.dict['memory_info'], 'vms', 0)),
bytes2human(getattr(p.dict['memory_info'], 'rss', 0)),
p.dict['cpu_percent'],
p.dict['memory_percent'],
ctime,
p.dict['name'] or '',
)
try:
print_line(line)
except curses.error:
break
win.refresh()
def main():
try:
interval = 0
while 1:
args = poll(interval)
refresh_window(*args)
interval = 1
except (KeyboardInterrupt, SystemExit):
pass
if __name__ == '__main__':
main()
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