python/psutil/examples/top.py@6474c204b198 (annotated)
python/psutil/examples/top.py
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rwxr-xr-x
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | #!/usr/bin/env python |
| michael@0 | 2 | |
| michael@0 | 3 | # Copyright (c) 2009, Giampaolo Rodola'. All rights reserved. |
| michael@0 | 4 | # Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 5 | # found in the LICENSE file. |
| michael@0 | 6 | |
| michael@0 | 7 | """ |
| michael@0 | 8 | A clone of top / htop. |
| michael@0 | 9 | |
| michael@0 | 10 | Author: Giampaolo Rodola' <g.rodola@gmail.com> |
| michael@0 | 11 | """ |
| michael@0 | 12 | |
| michael@0 | 13 | import os |
| michael@0 | 14 | import sys |
| michael@0 | 15 | if os.name != 'posix': |
| michael@0 | 16 | sys.exit('platform not supported') |
| michael@0 | 17 | import time |
| michael@0 | 18 | import curses |
| michael@0 | 19 | import atexit |
| michael@0 | 20 | from datetime import datetime, timedelta |
| michael@0 | 21 | |
| michael@0 | 22 | import psutil |
| michael@0 | 23 | |
| michael@0 | 24 | |
| michael@0 | 25 | # --- curses stuff |
| michael@0 | 26 | def tear_down(): |
| michael@0 | 27 | win.keypad(0) |
| michael@0 | 28 | curses.nocbreak() |
| michael@0 | 29 | curses.echo() |
| michael@0 | 30 | curses.endwin() |
| michael@0 | 31 | |
| michael@0 | 32 | win = curses.initscr() |
| michael@0 | 33 | atexit.register(tear_down) |
| michael@0 | 34 | curses.endwin() |
| michael@0 | 35 | lineno = 0 |
| michael@0 | 36 | |
| michael@0 | 37 | def print_line(line, highlight=False): |
| michael@0 | 38 | """A thin wrapper around curses's addstr().""" |
| michael@0 | 39 | global lineno |
| michael@0 | 40 | try: |
| michael@0 | 41 | if highlight: |
| michael@0 | 42 | line += " " * (win.getmaxyx()[1] - len(line)) |
| michael@0 | 43 | win.addstr(lineno, 0, line, curses.A_REVERSE) |
| michael@0 | 44 | else: |
| michael@0 | 45 | win.addstr(lineno, 0, line, 0) |
| michael@0 | 46 | except curses.error: |
| michael@0 | 47 | lineno = 0 |
| michael@0 | 48 | win.refresh() |
| michael@0 | 49 | raise |
| michael@0 | 50 | else: |
| michael@0 | 51 | lineno += 1 |
| michael@0 | 52 | # --- /curses stuff |
| michael@0 | 53 | |
| michael@0 | 54 | |
| michael@0 | 55 | def bytes2human(n): |
| michael@0 | 56 | """ |
| michael@0 | 57 | >>> bytes2human(10000) |
| michael@0 | 58 | '9K' |
| michael@0 | 59 | >>> bytes2human(100001221) |
| michael@0 | 60 | '95M' |
| michael@0 | 61 | """ |
| michael@0 | 62 | symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y') |
| michael@0 | 63 | prefix = {} |
| michael@0 | 64 | for i, s in enumerate(symbols): |
| michael@0 | 65 | prefix[s] = 1 << (i+1)*10 |
| michael@0 | 66 | for s in reversed(symbols): |
| michael@0 | 67 | if n >= prefix[s]: |
| michael@0 | 68 | value = int(float(n) / prefix[s]) |
| michael@0 | 69 | return '%s%s' % (value, s) |
| michael@0 | 70 | return "%sB" % n |
| michael@0 | 71 | |
| michael@0 | 72 | def poll(interval): |
| michael@0 | 73 | # sleep some time |
| michael@0 | 74 | time.sleep(interval) |
| michael@0 | 75 | procs = [] |
| michael@0 | 76 | procs_status = {} |
| michael@0 | 77 | for p in psutil.process_iter(): |
| michael@0 | 78 | try: |
| michael@0 | 79 | p.dict = p.as_dict(['username', 'get_nice', 'get_memory_info', |
| michael@0 | 80 | 'get_memory_percent', 'get_cpu_percent', |
| michael@0 | 81 | 'get_cpu_times', 'name', 'status']) |
| michael@0 | 82 | try: |
| michael@0 | 83 | procs_status[str(p.dict['status'])] += 1 |
| michael@0 | 84 | except KeyError: |
| michael@0 | 85 | procs_status[str(p.dict['status'])] = 1 |
| michael@0 | 86 | except psutil.NoSuchProcess: |
| michael@0 | 87 | pass |
| michael@0 | 88 | else: |
| michael@0 | 89 | procs.append(p) |
| michael@0 | 90 | |
| michael@0 | 91 | # return processes sorted by CPU percent usage |
| michael@0 | 92 | processes = sorted(procs, key=lambda p: p.dict['cpu_percent'], reverse=True) |
| michael@0 | 93 | return (processes, procs_status) |
| michael@0 | 94 | |
| michael@0 | 95 | def print_header(procs_status, num_procs): |
| michael@0 | 96 | """Print system-related info, above the process list.""" |
| michael@0 | 97 | |
| michael@0 | 98 | def get_dashes(perc): |
| michael@0 | 99 | dashes = "|" * int((float(perc) / 10 * 4)) |
| michael@0 | 100 | empty_dashes = " " * (40 - len(dashes)) |
| michael@0 | 101 | return dashes, empty_dashes |
| michael@0 | 102 | |
| michael@0 | 103 | # cpu usage |
| michael@0 | 104 | for cpu_num, perc in enumerate(psutil.cpu_percent(interval=0, percpu=True)): |
| michael@0 | 105 | dashes, empty_dashes = get_dashes(perc) |
| michael@0 | 106 | print_line(" CPU%-2s [%s%s] %5s%%" % (cpu_num, dashes, empty_dashes, |
| michael@0 | 107 | perc)) |
| michael@0 | 108 | mem = psutil.virtual_memory() |
| michael@0 | 109 | dashes, empty_dashes = get_dashes(mem.percent) |
| michael@0 | 110 | used = mem.total - mem.available |
| michael@0 | 111 | line = " Mem [%s%s] %5s%% %6s/%s" % ( |
| michael@0 | 112 | dashes, empty_dashes, |
| michael@0 | 113 | mem.percent, |
| michael@0 | 114 | str(int(used / 1024 / 1024)) + "M", |
| michael@0 | 115 | str(int(mem.total / 1024 / 1024)) + "M" |
| michael@0 | 116 | ) |
| michael@0 | 117 | print_line(line) |
| michael@0 | 118 | |
| michael@0 | 119 | # swap usage |
| michael@0 | 120 | swap = psutil.swap_memory() |
| michael@0 | 121 | dashes, empty_dashes = get_dashes(swap.percent) |
| michael@0 | 122 | line = " Swap [%s%s] %5s%% %6s/%s" % ( |
| michael@0 | 123 | dashes, empty_dashes, |
| michael@0 | 124 | swap.percent, |
| michael@0 | 125 | str(int(swap.used / 1024 / 1024)) + "M", |
| michael@0 | 126 | str(int(swap.total / 1024 / 1024)) + "M" |
| michael@0 | 127 | ) |
| michael@0 | 128 | print_line(line) |
| michael@0 | 129 | |
| michael@0 | 130 | # processes number and status |
| michael@0 | 131 | st = [] |
| michael@0 | 132 | for x, y in procs_status.items(): |
| michael@0 | 133 | if y: |
| michael@0 | 134 | st.append("%s=%s" % (x, y)) |
| michael@0 | 135 | st.sort(key=lambda x: x[:3] in ('run', 'sle'), reverse=1) |
| michael@0 | 136 | print_line(" Processes: %s (%s)" % (num_procs, ' '.join(st))) |
| michael@0 | 137 | # load average, uptime |
| michael@0 | 138 | uptime = datetime.now() - datetime.fromtimestamp(psutil.BOOT_TIME) |
| michael@0 | 139 | av1, av2, av3 = os.getloadavg() |
| michael@0 | 140 | line = " Load average: %.2f %.2f %.2f Uptime: %s" \ |
| michael@0 | 141 | % (av1, av2, av3, str(uptime).split('.')[0]) |
| michael@0 | 142 | print_line(line) |
| michael@0 | 143 | |
| michael@0 | 144 | def refresh_window(procs, procs_status): |
| michael@0 | 145 | """Print results on screen by using curses.""" |
| michael@0 | 146 | curses.endwin() |
| michael@0 | 147 | templ = "%-6s %-8s %4s %5s %5s %6s %4s %9s %2s" |
| michael@0 | 148 | win.erase() |
| michael@0 | 149 | header = templ % ("PID", "USER", "NI", "VIRT", "RES", "CPU%", "MEM%", |
| michael@0 | 150 | "TIME+", "NAME") |
| michael@0 | 151 | print_header(procs_status, len(procs)) |
| michael@0 | 152 | print_line("") |
| michael@0 | 153 | print_line(header, highlight=True) |
| michael@0 | 154 | for p in procs: |
| michael@0 | 155 | # TIME+ column shows process CPU cumulative time and it |
| michael@0 | 156 | # is expressed as: "mm:ss.ms" |
| michael@0 | 157 | if p.dict['cpu_times'] != None: |
| michael@0 | 158 | ctime = timedelta(seconds=sum(p.dict['cpu_times'])) |
| michael@0 | 159 | ctime = "%s:%s.%s" % (ctime.seconds // 60 % 60, |
| michael@0 | 160 | str((ctime.seconds % 60)).zfill(2), |
| michael@0 | 161 | str(ctime.microseconds)[:2]) |
| michael@0 | 162 | else: |
| michael@0 | 163 | ctime = '' |
| michael@0 | 164 | if p.dict['memory_percent'] is not None: |
| michael@0 | 165 | p.dict['memory_percent'] = round(p.dict['memory_percent'], 1) |
| michael@0 | 166 | else: |
| michael@0 | 167 | p.dict['memory_percent'] = '' |
| michael@0 | 168 | if p.dict['cpu_percent'] is None: |
| michael@0 | 169 | p.dict['cpu_percent'] = '' |
| michael@0 | 170 | if p.dict['username']: |
| michael@0 | 171 | username = p.dict['username'][:8] |
| michael@0 | 172 | else: |
| michael@0 | 173 | username = "" |
| michael@0 | 174 | line = templ % (p.pid, |
| michael@0 | 175 | username, |
| michael@0 | 176 | p.dict['nice'], |
| michael@0 | 177 | bytes2human(getattr(p.dict['memory_info'], 'vms', 0)), |
| michael@0 | 178 | bytes2human(getattr(p.dict['memory_info'], 'rss', 0)), |
| michael@0 | 179 | p.dict['cpu_percent'], |
| michael@0 | 180 | p.dict['memory_percent'], |
| michael@0 | 181 | ctime, |
| michael@0 | 182 | p.dict['name'] or '', |
| michael@0 | 183 | ) |
| michael@0 | 184 | try: |
| michael@0 | 185 | print_line(line) |
| michael@0 | 186 | except curses.error: |
| michael@0 | 187 | break |
| michael@0 | 188 | win.refresh() |
| michael@0 | 189 | |
| michael@0 | 190 | |
| michael@0 | 191 | def main(): |
| michael@0 | 192 | try: |
| michael@0 | 193 | interval = 0 |
| michael@0 | 194 | while 1: |
| michael@0 | 195 | args = poll(interval) |
| michael@0 | 196 | refresh_window(*args) |
| michael@0 | 197 | interval = 1 |
| michael@0 | 198 | except (KeyboardInterrupt, SystemExit): |
| michael@0 | 199 | pass |
| michael@0 | 200 | |
| michael@0 | 201 | if __name__ == '__main__': |
| michael@0 | 202 | main() |
