1 # This program is free software; you can redistribute it and/or modify
2 # it under the terms of the GNU General Public License as published by
3 # the Free Software Foundation; either version 2 of the License, or
4 # (at your option) any later version.
6 # This program is distributed in the hope that it will be useful,
7 # but WITHOUT ANY WARRANTY; without even the implied warranty of
8 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 # GNU Library General Public License for more details.
11 # You should have received a copy of the GNU General Public License
12 # along with this program; if not, write to the Free Software
13 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
15 # See the COPYING file for license information.
17 # Copyright (c) 2007 Guillaume Chazarain <guichaz@gmail.com>
19 # Allow printing with same syntax in Python 2/3
20 from __future__
import print_function
33 from iotop
.data
import find_uids
, TaskStatsNetlink
, ProcessList
, Stats
34 from iotop
.data
import ThreadInfo
35 from iotop
.version
import VERSION
36 from iotop
import ioprio
37 from iotop
.ioprio
import IoprioSetError
40 # Utility functions for the UI
43 UNITS
= ['B', 'K', 'M', 'G', 'T', 'P', 'E']
54 expo
= int(math
.log(size
/ 2, 2) / 10)
55 return '%s%.2f %s' % (sign
, (float(size
) / (1 << (10 * expo
))), UNITS
[expo
])
57 def format_size(options
, bytes
):
59 return '%.2f K' % (bytes
/ 1024.0)
60 return human_size(bytes
)
62 def format_bandwidth(options
, size
, duration
):
63 return format_size(options
, size
and float(size
) / duration
) + '/s'
65 def format_stats(options
, process
, duration
):
66 # Keep in sync with TaskStatsNetlink.members_offsets and
67 # IOTopUI.get_data(self)
68 def delay2percent(delay
): # delay in ns, duration in s
69 return '%.2f %%' % min(99.99, delay
/ (duration
* 10000000.0))
70 if options
.accumulated
:
71 stats
= process
.stats_accum
72 display_format
= lambda size
, duration
: format_size(options
, size
)
73 duration
= time
.time() - process
.stats_accum_timestamp
75 stats
= process
.stats_delta
76 display_format
= lambda size
, duration
: format_bandwidth(
77 options
, size
, duration
)
78 io_delay
= delay2percent(stats
.blkio_delay_total
)
79 swapin_delay
= delay2percent(stats
.swapin_delay_total
)
80 read_bytes
= display_format(stats
.read_bytes
, duration
)
81 written_bytes
= stats
.write_bytes
- stats
.cancelled_write_bytes
82 written_bytes
= max(0, written_bytes
)
83 write_bytes
= display_format(written_bytes
, duration
)
84 return io_delay
, swapin_delay
, read_bytes
, write_bytes
86 def get_max_pid_width():
88 return len(open('/proc/sys/kernel/pid_max').read().strip())
89 except Exception as e
:
91 # Reasonable default in case something fails
94 MAX_PID_WIDTH
= get_max_pid_width()
100 class CancelInput(Exception): pass
101 class InvalidInt(Exception): pass
102 class InvalidPid(Exception): pass
103 class InvalidTid(Exception): pass
104 class InvalidIoprioData(Exception): pass
110 class IOTopUI(object):
113 (lambda p
, s
: p
.pid
, False),
114 (lambda p
, s
: p
.ioprio_sort_key(), False),
115 (lambda p
, s
: p
.get_user(), False),
116 (lambda p
, s
: s
.read_bytes
, True),
117 (lambda p
, s
: s
.write_bytes
- s
.cancelled_write_bytes
, True),
118 (lambda p
, s
: s
.swapin_delay_total
, True),
119 # The default sorting (by I/O % time) should show processes doing
120 # only writes, without waiting on them
121 (lambda p
, s
: s
.blkio_delay_total
or
122 int(not(not(s
.read_bytes
or s
.write_bytes
))), True),
123 (lambda p
, s
: p
.get_cmdline(), False),
126 def __init__(self
, win
, process_list
, options
):
127 self
.process_list
= process_list
128 self
.options
= options
130 self
.sorting_reverse
= IOTopUI
.sorting_keys
[self
.sorting_key
][1]
131 if not self
.options
.batch
:
135 curses
.use_default_colors()
139 # This call can fail with misconfigured terminals, for example
140 # TERM=xterm-color. This is harmless
144 self
.height
, self
.width
= self
.win
.getmaxyx()
149 if not self
.options
.batch
:
150 poll
.register(sys
.stdin
.fileno(), select
.POLLIN|select
.POLLPRI
)
151 while self
.options
.iterations
is None or \
152 iterations
< self
.options
.iterations
:
153 total
= self
.process_list
.refresh_processes()
154 total_read
, total_write
= total
155 self
.refresh_display(iterations
== 0, total_read
, total_write
,
156 self
.process_list
.duration
)
157 if self
.options
.iterations
is not None:
159 if iterations
>= self
.options
.iterations
:
161 elif iterations
== 0:
165 events
= poll
.poll(self
.options
.delay_seconds
* 1000.0)
166 except select
.error
as e
:
167 if e
.args
and e
.args
[0] == errno
.EINTR
:
171 if not self
.options
.batch
:
174 key
= self
.win
.getch()
177 def reverse_sorting(self
):
178 self
.sorting_reverse
= not self
.sorting_reverse
180 def adjust_sorting_key(self
, delta
):
181 orig_sorting_key
= self
.sorting_key
182 self
.sorting_key
+= delta
183 self
.sorting_key
= max(0, self
.sorting_key
)
184 self
.sorting_key
= min(len(IOTopUI
.sorting_keys
) - 1, self
.sorting_key
)
185 if orig_sorting_key
!= self
.sorting_key
:
186 self
.sorting_reverse
= IOTopUI
.sorting_keys
[self
.sorting_key
][1]
188 # I wonder if switching to urwid for the display would be better here
190 def prompt_str(self
, prompt
, default
=None, empty_is_cancel
=True):
191 self
.win
.hline(1, 0, ord(' ') | curses
.A_NORMAL
, self
.width
)
192 self
.win
.addstr(1, 0, prompt
, curses
.A_BOLD
)
196 inp
= self
.win
.getstr(1, len(prompt
))
199 if inp
not in (None, ''):
205 def prompt_int(self
, prompt
, default
= None, empty_is_cancel
= True):
206 inp
= self
.prompt_str(prompt
, default
, empty_is_cancel
)
212 def prompt_pid(self
):
214 return self
.prompt_int('PID to ionice: ')
220 def prompt_tid(self
):
222 return self
.prompt_int('TID to ionice: ')
228 def prompt_data(self
, ioprio_data
):
230 if ioprio_data
is not None:
231 inp
= self
.prompt_int('I/O priority data (0-7, currently %s): '
232 % ioprio_data
, ioprio_data
, False)
234 inp
= self
.prompt_int('I/O priority data (0-7): ', None, False)
236 raise InvalidIoprioData()
237 if inp
< 0 or inp
> 7:
238 raise InvalidIoprioData()
241 def prompt_set(self
, prompt
, display_list
, ret_list
, selected
):
243 selected
= ret_list
.index(selected
)
246 set_len
= len(display_list
) - 1
248 self
.win
.hline(1, 0, ord(' ') | curses
.A_NORMAL
, self
.width
)
249 self
.win
.insstr(1, 0, prompt
, curses
.A_BOLD
)
251 for i
, item
in enumerate(display_list
):
252 display
= ' %s ' % item
254 attr
= curses
.A_REVERSE
256 attr
= curses
.A_NORMAL
257 self
.win
.insstr(1, offset
, display
, attr
)
258 offset
+= len(display
)
260 key
= self
.win
.getch()
261 if key
in (curses
.KEY_LEFT
, ord('l')) and selected
> 0:
264 elif key
in (curses
.KEY_RIGHT
, ord('r')) and selected
< set_len
:
267 elif key
in (curses
.KEY_ENTER
, ord('\n'), ord('\r')):
268 return ret_list
[selected
]
269 elif key
in (27, curses
.KEY_CANCEL
, curses
.KEY_CLOSE
,
270 curses
.KEY_EXIT
, ord('q'), ord('Q')):
273 def prompt_class(self
, ioprio_class
=None):
274 prompt
= 'I/O priority class: '
275 classes_prompt
= ['Real-time', 'Best-effort', 'Idle']
276 classes_ret
= ['rt', 'be', 'idle']
277 if ioprio_class
is None:
279 inp
= self
.prompt_set(prompt
, classes_prompt
, classes_ret
, ioprio_class
)
282 def prompt_error(self
, error
= 'Error!'):
283 self
.win
.hline(1, 0, ord(' ') | curses
.A_NORMAL
, self
.width
)
284 self
.win
.insstr(1, 0, ' %s ' % error
, curses
.A_REVERSE
)
288 def prompt_clear(self
):
289 self
.win
.hline(1, 0, ord(' ') | curses
.A_NORMAL
, self
.width
)
292 def handle_key(self
, key
):
293 def toggle_accumulated():
294 self
.options
.accumulated ^
= True
295 def toggle_only_io():
296 self
.options
.only ^
= True
297 def toggle_processes():
298 self
.options
.processes ^
= True
299 self
.process_list
.clear()
300 self
.process_list
.refresh_processes()
303 if self
.options
.processes
:
304 pid
= self
.prompt_pid()
305 exec_unit
= self
.process_list
.get_process(pid
)
307 tid
= self
.prompt_tid()
308 exec_unit
= ThreadInfo(tid
,
309 self
.process_list
.taskstats_connection
)
310 ioprio_value
= exec_unit
.get_ioprio()
311 (ioprio_class
, ioprio_data
) = \
312 ioprio
.to_class_and_data(ioprio_value
)
313 ioprio_class
= self
.prompt_class(ioprio_class
)
314 if ioprio_class
== 'idle':
317 ioprio_data
= self
.prompt_data(ioprio_data
)
318 exec_unit
.set_ioprio(ioprio_class
, ioprio_data
)
319 self
.process_list
.clear()
320 self
.process_list
.refresh_processes()
321 except IoprioSetError
as e
:
322 self
.prompt_error('Error setting I/O priority: %s' % e
.err
)
324 self
.prompt_error('Invalid process id!')
326 self
.prompt_error('Invalid thread id!')
327 except InvalidIoprioData
:
328 self
.prompt_error('Invalid I/O priority data!')
330 self
.prompt_error('Invalid integer!')
342 lambda: self
.reverse_sorting(),
344 lambda: self
.reverse_sorting(),
362 lambda: self
.adjust_sorting_key(-1),
364 lambda: self
.adjust_sorting_key(1),
366 lambda: self
.adjust_sorting_key(-len(IOTopUI
.sorting_keys
)),
368 lambda: self
.adjust_sorting_key(len(IOTopUI
.sorting_keys
))
371 action
= key_bindings
.get(key
, lambda: None)
376 stats
= format_stats(self
.options
, p
, self
.process_list
.duration
)
377 io_delay
, swapin_delay
, read_bytes
, write_bytes
= stats
378 if Stats
.has_blkio_delay_total
:
379 delay_stats
= '%7s %7s ' % (swapin_delay
, io_delay
)
381 delay_stats
= ' ?unavailable? '
382 pid_format
= '%%%dd' % MAX_PID_WIDTH
383 line
= (pid_format
+ ' %4s %-8s %11s %11s %s') % (
384 p
.pid
, p
.get_ioprio(), p
.get_user()[:8], read_bytes
,
385 write_bytes
, delay_stats
)
386 cmdline
= p
.get_cmdline()
387 if not self
.options
.batch
:
388 remaining_length
= self
.width
- len(line
)
389 if 2 < remaining_length
< len(cmdline
):
390 len1
= (remaining_length
- 1) // 2
391 offset2
= -(remaining_length
- len1
- 1)
392 cmdline
= cmdline
[:len1
] + '~' + cmdline
[offset2
:]
394 if not self
.options
.batch
:
395 line
= line
[:self
.width
]
398 def should_format(p
):
399 return not self
.options
.only
or \
400 p
.did_some_io(self
.options
.accumulated
)
402 processes
= list(filter(should_format
,
403 self
.process_list
.processes
.values()))
404 key
= IOTopUI
.sorting_keys
[self
.sorting_key
][0]
405 if self
.options
.accumulated
:
406 stats_lambda
= lambda p
: p
.stats_accum
408 stats_lambda
= lambda p
: p
.stats_delta
409 processes
.sort(key
=lambda p
: key(p
, stats_lambda(p
)),
410 reverse
=self
.sorting_reverse
)
411 if not self
.options
.batch
:
412 del processes
[self
.height
- 2:]
413 return list(map(format
, processes
))
415 def refresh_display(self
, first_time
, total_read
, total_write
, duration
):
416 summary
= 'Total DISK READ: %s | Total DISK WRITE: %s' % (
417 format_bandwidth(self
.options
, total_read
, duration
).rjust(14),
418 format_bandwidth(self
.options
, total_write
, duration
).rjust(14))
420 pid
= max(0, (MAX_PID_WIDTH
- 3)) * ' '
421 if self
.options
.processes
:
425 titles
= [pid
, ' PRIO', ' USER', ' DISK READ', ' DISK WRITE',
426 ' SWAPIN', ' IO', ' COMMAND']
427 lines
= self
.get_data()
428 if self
.options
.time
:
429 titles
= [' TIME'] + titles
430 current_time
= time
.strftime('%H:%M:%S ')
431 lines
= [current_time
+ l
for l
in lines
]
432 summary
= current_time
+ summary
433 if self
.options
.batch
:
434 if self
.options
.quiet
<= 2:
436 if self
.options
.quiet
<= int(first_time
):
437 print(''.join(titles
))
443 self
.win
.addstr(summary
[:self
.width
])
444 self
.win
.hline(1, 0, ord(' ') | curses
.A_REVERSE
, self
.width
)
445 remaining_cols
= self
.width
446 for i
in range(len(titles
)):
447 attr
= curses
.A_REVERSE
449 if i
== self
.sorting_key
:
451 if i
== self
.sorting_key
:
452 attr |
= curses
.A_BOLD
453 title
+= self
.sorting_reverse
and '>' or '<'
454 title
= title
[:remaining_cols
]
455 remaining_cols
-= len(title
)
456 self
.win
.addstr(title
, attr
)
457 if Stats
.has_blkio_delay_total
:
460 status_msg
= ('CONFIG_TASK_DELAY_ACCT not enabled in kernel, '
461 'cannot determine SWAPIN and IO %')
462 num_lines
= min(len(lines
), self
.height
- 2 - int(bool(status_msg
)))
463 for i
in range(num_lines
):
465 self
.win
.addstr(i
+ 2, 0, lines
[i
])
469 self
.win
.insstr(self
.height
- 1, 0, status_msg
, curses
.A_BOLD
)
472 def run_iotop_window(win
, options
):
474 signal
.signal(signal
.SIGPIPE
, signal
.SIG_DFL
)
475 taskstats_connection
= TaskStatsNetlink(options
)
476 process_list
= ProcessList(taskstats_connection
, options
)
477 ui
= IOTopUI(win
, process_list
, options
)
480 def run_iotop(options
):
483 return run_iotop_window(None, options
)
485 return curses
.wrapper(run_iotop_window
, options
)
487 if e
.errno
== errno
.EPERM
:
488 print(e
, file=sys
.stderr
)
490 The Linux kernel interfaces that iotop relies on now require root priviliges
491 or the NET_ADMIN capability. This change occured because a security issue
492 (CVE-2011-2494) was found that allows leakage of sensitive data across user
493 boundaries. If you require the ability to run iotop as a non-root user, please
494 configure sudo to allow you to run iotop as root.
496 Please do not file bugs on iotop about this.''', file=sys
.stderr
)
505 def _profile(continuation
):
506 prof_file
= 'iotop.prof'
510 print('Profiling using cProfile')
511 cProfile
.runctx('continuation()', globals(), locals(), prof_file
)
512 stats
= pstats
.Stats(prof_file
)
516 prof
= hotshot
.Profile(prof_file
, lineevents
=1)
517 print('Profiling using hotshot')
518 prof
.runcall(continuation
)
520 stats
= hotshot
.stats
.load(prof_file
)
522 stats
.sort_stats('time', 'calls')
523 stats
.print_stats(50)
524 stats
.print_callees(50)
531 USAGE
= '''%s [OPTIONS]
533 DISK READ and DISK WRITE are the block I/O bandwidth used during the sampling
534 period. SWAPIN and IO are the percentages of time the thread spent respectively
535 while swapping in and waiting on I/O more generally. PRIO is the I/O priority at
536 which the thread is running (set using the ionice command).
538 Controls: left and right arrows to change the sorting column, r to invert the
539 sorting order, o to toggle the --only option, p to toggle the --processes
540 option, a to toggle the --accumulated option, i to change I/O priority, q to
541 quit, any other key to force a refresh.''' % sys
.argv
[0]
545 locale
.setlocale(locale
.LC_ALL
, '')
547 print('unable to set locale, falling back to the default locale')
548 parser
= optparse
.OptionParser(usage
=USAGE
, version
='iotop ' + VERSION
)
549 parser
.add_option('-o', '--only', action
='store_true',
550 dest
='only', default
=False,
551 help='only show processes or threads actually doing I/O')
552 parser
.add_option('-b', '--batch', action
='store_true', dest
='batch',
553 help='non-interactive mode')
554 parser
.add_option('-n', '--iter', type='int', dest
='iterations',
556 help='number of iterations before ending [infinite]')
557 parser
.add_option('-d', '--delay', type='float', dest
='delay_seconds',
558 help='delay between iterations [1 second]',
559 metavar
='SEC', default
=1)
560 parser
.add_option('-p', '--pid', type='int', dest
='pids', action
='append',
561 help='processes/threads to monitor [all]', metavar
='PID')
562 parser
.add_option('-u', '--user', type='str', dest
='users', action
='append',
563 help='users to monitor [all]', metavar
='USER')
564 parser
.add_option('-P', '--processes', action
='store_true',
565 dest
='processes', default
=False,
566 help='only show processes, not all threads')
567 parser
.add_option('-a', '--accumulated', action
='store_true',
568 dest
='accumulated', default
=False,
569 help='show accumulated I/O instead of bandwidth')
570 parser
.add_option('-k', '--kilobytes', action
='store_true',
571 dest
='kilobytes', default
=False,
572 help='use kilobytes instead of a human friendly unit')
573 parser
.add_option('-t', '--time', action
='store_true', dest
='time',
574 help='add a timestamp on each line (implies --batch)')
575 parser
.add_option('-q', '--quiet', action
='count', dest
='quiet', default
=0,
576 help='suppress some lines of header (implies --batch)')
577 parser
.add_option('--profile', action
='store_true', dest
='profile',
578 default
=False, help=optparse
.SUPPRESS_HELP
)
580 options
, args
= parser
.parse_args()
582 parser
.error('Unexpected arguments: ' + ' '.join(args
))
584 options
.pids
= options
.pids
or []
585 options
.batch
= options
.batch
or options
.time
or options
.quiet
587 main_loop
= lambda: run_iotop(options
)
590 def safe_main_loop():
595 _profile(safe_main_loop
)