+++ /dev/null
-#!/usr/bin/env python
-
-# Try to determine how much RAM is currently being used per program.
-# Note per _program_, not per process. So for example this script
-# will report RAM used by all httpd process together. In detail it reports:
-# sum(private RAM for program processes) + sum(Shared RAM for program processes)
-# The shared RAM is problematic to calculate, and this script automatically
-# selects the most accurate method available for your kernel.
-
-# Licence: LGPLv2
-# Author: P@draigBrady.com
-# Source: http://www.pixelbeat.org/scripts/ps_mem.py
-
-# V1.0 06 Jul 2005 Initial release
-# V1.1 11 Aug 2006 root permission required for accuracy
-# V1.2 08 Nov 2006 Add total to output
-# Use KiB,MiB,... for units rather than K,M,...
-# V1.3 22 Nov 2006 Ignore shared col from /proc/$pid/statm for
-# 2.6 kernels up to and including 2.6.9.
-# There it represented the total file backed extent
-# V1.4 23 Nov 2006 Remove total from output as it's meaningless
-# (the shared values overlap with other programs).
-# Display the shared column. This extra info is
-# useful, especially as it overlaps between programs.
-# V1.5 26 Mar 2007 Remove redundant recursion from human()
-# V1.6 05 Jun 2007 Also report number of processes with a given name.
-# Patch from riccardo.murri@gmail.com
-# V1.7 20 Sep 2007 Use PSS from /proc/$pid/smaps if available, which
-# fixes some over-estimation and allows totalling.
-# Enumerate the PIDs directly rather than using ps,
-# which fixes the possible race between reading
-# RSS with ps, and shared memory with this program.
-# Also we can show non truncated command names.
-# V1.8 28 Sep 2007 More accurate matching for stats in /proc/$pid/smaps
-# as otherwise could match libraries causing a crash.
-# Patch from patrice.bouchand.fedora@gmail.com
-# V1.9 20 Feb 2008 Fix invalid values reported when PSS is available.
-# Reported by Andrey Borzenkov <arvidjaar@mail.ru>
-# V3.1 10 May 2013
-# http://github.com/pixelb/scripts/commits/master/scripts/ps_mem.py
-
-# Notes:
-#
-# All interpreted programs where the interpreter is started
-# by the shell or with env, will be merged to the interpreter
-# (as that's what's given to exec). For e.g. all python programs
-# starting with "#!/usr/bin/env python" will be grouped under python.
-# You can change this by using the full command line but that will
-# have the undesirable affect of splitting up programs started with
-# differing parameters (for e.g. mingetty tty[1-6]).
-#
-# For 2.6 kernels up to and including 2.6.13 and later 2.4 redhat kernels
-# (rmap vm without smaps) it can not be accurately determined how many pages
-# are shared between processes in general or within a program in our case:
-# http://lkml.org/lkml/2005/7/6/250
-# A warning is printed if overestimation is possible.
-# In addition for 2.6 kernels up to 2.6.9 inclusive, the shared
-# value in /proc/$pid/statm is the total file-backed extent of a process.
-# We ignore that, introducing more overestimation, again printing a warning.
-# Since kernel 2.6.23-rc8-mm1 PSS is available in smaps, which allows
-# us to calculate a more accurate value for the total RAM used by programs.
-#
-# Programs that use CLONE_VM without CLONE_THREAD are discounted by assuming
-# they're the only programs that have the same /proc/$PID/smaps file for
-# each instance. This will fail if there are multiple real instances of a
-# program that then use CLONE_VM without CLONE_THREAD, or if a clone changes
-# its memory map while we're checksumming each /proc/$PID/smaps.
-#
-# I don't take account of memory allocated for a program
-# by other programs. For e.g. memory used in the X server for
-# a program could be determined, but is not.
-#
-# FreeBSD is supported if linprocfs is mounted at /compat/linux/proc/
-# FreeBSD 8.0 supports up to a level of Linux 2.6.16
-
-# TODO/FIXME: The script currently requires root permission to gather
-# memory usage details about all the processes. This restriction
-# has to be relaxed --- when running without root only the user's
-# processes details should be displayed
-
-import getopt
-import time
-import errno
-import os
-import sys
-
-try:
- # md5 module is deprecated on python 2.6
- # so try the newer hashlib first
- import hashlib
- md5_new = hashlib.md5
-except ImportError:
- import md5
- md5_new = md5.new
-
-
-# The following exits cleanly on Ctrl-C or EPIPE
-# while treating other exceptions as before.
-def std_exceptions(etype, value, tb):
- sys.excepthook = sys.__excepthook__
- if issubclass(etype, KeyboardInterrupt):
- pass
- elif issubclass(etype, IOError) and value.errno == errno.EPIPE:
- pass
- else:
- sys.__excepthook__(etype, value, tb)
-sys.excepthook = std_exceptions
-
-#
-# Define some global variables
-#
-
-PAGESIZE = os.sysconf("SC_PAGE_SIZE") / 1024 #KiB
-our_pid = os.getpid()
-
-have_pss = 0
-
-class Proc:
- def __init__(self):
- uname = os.uname()
- if uname[0] == "FreeBSD":
- self.proc = '/compat/linux/proc'
- else:
- self.proc = '/proc'
-
- def path(self, *args):
- return os.path.join(self.proc, *(str(a) for a in args))
-
- def open(self, *args):
- try:
- return open(self.path(*args))
- except (IOError, OSError):
- val = sys.exc_info()[1]
- if (val.errno == errno.ENOENT or # kernel thread or process gone
- val.errno == errno.EPERM):
- raise LookupError
-
-proc = Proc()
-
-
-#
-# Functions
-#
-
-def parse_options():
- try:
- long_options = ['split-args', 'help']
- opts, args = getopt.getopt(sys.argv[1:], "shp:w:", long_options)
- except getopt.GetoptError:
- sys.stderr.write(help())
- sys.exit(3)
-
- # ps_mem.py options
- split_args = False
- pids_to_show = None
- watch = None
-
- for o, a in opts:
- if o in ('-s', '--split-args'):
- split_args = True
- if o in ('-h', '--help'):
- sys.stdout.write(help())
- sys.exit(0)
- if o in ('-p',):
- try:
- pids_to_show = [int(x) for x in a.split(',')]
- except:
- sys.stderr.write(help())
- sys.exit(3)
- if o in ('-w',):
- try:
- watch = int(a)
- except:
- sys.stderr.write(help())
- sys.exit(3)
-
- return (split_args, pids_to_show, watch)
-
-def help():
- help_msg = 'ps_mem.py - Show process memory usage\n'\
- '\n'\
- '-h Show this help\n'\
- '-w <N> Measure and show process memory every N seconds\n'\
- '-p <pid>[,pid2,...pidN] Only show memory usage PIDs in the specified list\n'
-
- return help_msg
-
-#(major,minor,release)
-def kernel_ver():
- kv = proc.open('sys/kernel/osrelease').readline().split(".")[:3]
- last = len(kv)
- if last == 2:
- kv.append('0')
- last -= 1
- for char in "-_":
- kv[last] = kv[last].split(char)[0]
- try:
- int(kv[last])
- except:
- kv[last] = 0
- return (int(kv[0]), int(kv[1]), int(kv[2]))
-
-
-#return Private,Shared
-#Note shared is always a subset of rss (trs is not always)
-def getMemStats(pid):
- global have_pss
- mem_id = pid #unique
- Private_lines = []
- Shared_lines = []
- Pss_lines = []
- Rss = (int(proc.open(pid, 'statm').readline().split()[1])
- * PAGESIZE)
- if os.path.exists(proc.path(pid, 'smaps')): #stat
- digester = md5_new()
- for line in proc.open(pid, 'smaps').readlines(): #open
- # Note we checksum smaps as maps is usually but
- # not always different for separate processes.
- digester.update(line.encode('latin1'))
- if line.startswith("Shared"):
- Shared_lines.append(line)
- elif line.startswith("Private"):
- Private_lines.append(line)
- elif line.startswith("Pss"):
- have_pss = 1
- Pss_lines.append(line)
- mem_id = digester.hexdigest()
- Shared = sum([int(line.split()[1]) for line in Shared_lines])
- Private = sum([int(line.split()[1]) for line in Private_lines])
- #Note Shared + Private = Rss above
- #The Rss in smaps includes video card mem etc.
- if have_pss:
- pss_adjust = 0.5 # add 0.5KiB as this avg error due to trunctation
- Pss = sum([float(line.split()[1])+pss_adjust for line in Pss_lines])
- Shared = Pss - Private
- elif (2,6,1) <= kernel_ver() <= (2,6,9):
- Shared = 0 #lots of overestimation, but what can we do?
- Private = Rss
- else:
- Shared = int(proc.open(pid, 'statm').readline().split()[2])
- Shared *= PAGESIZE
- Private = Rss - Shared
- return (Private, Shared, mem_id)
-
-
-def getCmdName(pid, split_args):
- cmdline = proc.open(pid, 'cmdline').read().split("\0")
- if cmdline[-1] == '' and len(cmdline) > 1:
- cmdline = cmdline[:-1]
-
- path = proc.path(pid, 'exe')
- try:
- path = os.readlink(path)
- # Some symlink targets were seen to contain NULs on RHEL 5 at least
- # https://github.com/pixelb/scripts/pull/10, so take string up to NUL
- path = path.split('\0')[0]
- except OSError:
- val = sys.exc_info()[1]
- if (val.errno == errno.ENOENT or # either kernel thread or process gone
- val.errno == errno.EPERM):
- raise LookupError
-
- if split_args:
- return " ".join(cmdline)
- if path.endswith(" (deleted)"):
- path = path[:-10]
- if os.path.exists(path):
- path += " [updated]"
- else:
- #The path could be have prelink stuff so try cmdline
- #which might have the full path present. This helped for:
- #/usr/libexec/notification-area-applet.#prelink#.fX7LCT (deleted)
- if os.path.exists(cmdline[0]):
- path = cmdline[0] + " [updated]"
- else:
- path += " [deleted]"
- exe = os.path.basename(path)
- cmd = proc.open(pid, 'status').readline()[6:-1]
- if exe.startswith(cmd):
- cmd = exe #show non truncated version
- #Note because we show the non truncated name
- #one can have separated programs as follows:
- #584.0 KiB + 1.0 MiB = 1.6 MiB mozilla-thunder (exe -> bash)
- # 56.0 MiB + 22.2 MiB = 78.2 MiB mozilla-thunderbird-bin
- return cmd
-
-
-#The following matches "du -h" output
-#see also human.py
-def human(num, power="Ki"):
- powers = ["Ki", "Mi", "Gi", "Ti"]
- while num >= 1000: #4 digits
- num /= 1024.0
- power = powers[powers.index(power)+1]
- return "%.1f %s" % (num, power)
-
-
-def cmd_with_count(cmd, count):
- if count > 1:
- return "%s (%u)" % (cmd, count)
- else:
- return cmd
-
-#Warn of possible inaccuracies
-#2 = accurate & can total
-#1 = accurate only considering each process in isolation
-#0 = some shared mem not reported
-#-1= all shared mem not reported
-def shared_val_accuracy():
- """http://wiki.apache.org/spamassassin/TopSharedMemoryBug"""
- kv = kernel_ver()
- if kv[:2] == (2,4):
- if proc.open('meminfo').read().find("Inact_") == -1:
- return 1
- return 0
- elif kv[:2] == (2,6):
- pid = os.getpid()
- if os.path.exists(proc.path(pid, 'smaps')):
- if proc.open(pid, 'smaps').read().find("Pss:")!=-1:
- return 2
- else:
- return 1
- if (2,6,1) <= kv <= (2,6,9):
- return -1
- return 0
- elif kv[0] > 2:
- return 2
- else:
- return 1
-
-def show_shared_val_accuracy( possible_inacc ):
- if possible_inacc == -1:
- sys.stderr.write(
- "Warning: Shared memory is not reported by this system.\n"
- )
- sys.stderr.write(
- "Values reported will be too large, and totals are not reported\n"
- )
- elif possible_inacc == 0:
- sys.stderr.write(
- "Warning: Shared memory is not reported accurately by this system.\n"
- )
- sys.stderr.write(
- "Values reported could be too large, and totals are not reported\n"
- )
- elif possible_inacc == 1:
- sys.stderr.write(
- "Warning: Shared memory is slightly over-estimated by this system\n"
- "for each program, so totals are not reported.\n"
- )
- sys.stderr.close()
-
-def get_memory_usage( pids_to_show, split_args, include_self=False, only_self=False ):
- cmds = {}
- shareds = {}
- mem_ids = {}
- count = {}
- for pid in os.listdir(proc.path('')):
- if not pid.isdigit():
- continue
- pid = int(pid)
-
- # Some filters
- if only_self and pid != our_pid:
- continue
- if pid == our_pid and not include_self:
- continue
- if pids_to_show is not None and pid not in pids_to_show:
- continue
-
- try:
- cmd = getCmdName(pid, split_args)
- except LookupError:
- #permission denied or
- #kernel threads don't have exe links or
- #process gone
- continue
-
- try:
- private, shared, mem_id = getMemStats(pid)
- except RuntimeError:
- continue #process gone
- if shareds.get(cmd):
- if have_pss: #add shared portion of PSS together
- shareds[cmd] += shared
- elif shareds[cmd] < shared: #just take largest shared val
- shareds[cmd] = shared
- else:
- shareds[cmd] = shared
- cmds[cmd] = cmds.setdefault(cmd, 0) + private
- if cmd in count:
- count[cmd] += 1
- else:
- count[cmd] = 1
- mem_ids.setdefault(cmd, {}).update({mem_id:None})
-
- #Add shared mem for each program
- total = 0
- for cmd in cmds:
- cmd_count = count[cmd]
- if len(mem_ids[cmd]) == 1 and cmd_count > 1:
- # Assume this program is using CLONE_VM without CLONE_THREAD
- # so only account for one of the processes
- cmds[cmd] /= cmd_count
- if have_pss:
- shareds[cmd] /= cmd_count
- cmds[cmd] = cmds[cmd] + shareds[cmd]
- total += cmds[cmd] #valid if PSS available
-
- sorted_cmds = sorted(cmds.items(), key=lambda x:x[1])
- sorted_cmds = [x for x in sorted_cmds if x[1]]
-
- return sorted_cmds, shareds, count, total
-
-def print_header():
- sys.stdout.write(" Private + Shared = RAM used\tProgram \n\n")
-
-def print_memory_usage(sorted_cmds, shareds, count, total):
- for cmd in sorted_cmds:
- sys.stdout.write("%8sB + %8sB = %8sB\t%s\n" %
- (human(cmd[1]-shareds[cmd[0]]),
- human(shareds[cmd[0]]), human(cmd[1]),
- cmd_with_count(cmd[0], count[cmd[0]])))
- if have_pss:
- sys.stdout.write("%s\n%s%8sB\n%s\n" %
- ("-" * 33, " " * 24, human(total), "=" * 33))
-
-def verify_environment():
- if os.geteuid() != 0:
- sys.stderr.write("Sorry, root permission required.\n")
- if __name__ == '__main__':
- sys.stderr.close()
- sys.exit(1)
-
- try:
- kv = kernel_ver()
- except (IOError, OSError):
- val = sys.exc_info()[1]
- if val.errno == errno.ENOENT:
- sys.stderr.write(
- "Couldn't access " + proc.path('') + "\n"
- "Only GNU/Linux and FreeBSD (with linprocfs) are supported\n")
- sys.exit(2)
- else:
- raise
-
-if __name__ == '__main__':
- verify_environment()
- split_args, pids_to_show, watch = parse_options()
-
- print_header()
-
- if watch is not None:
- try:
- sorted_cmds = True
- while sorted_cmds:
- sorted_cmds, shareds, count, total = get_memory_usage( pids_to_show, split_args )
- print_memory_usage(sorted_cmds, shareds, count, total)
- time.sleep(watch)
- else:
- sys.stdout.write('Process does not exist anymore.\n')
- except KeyboardInterrupt:
- pass
- else:
- # This is the default behavior
- sorted_cmds, shareds, count, total = get_memory_usage( pids_to_show, split_args )
- print_memory_usage(sorted_cmds, shareds, count, total)
-
-
- # We must close explicitly, so that any EPIPE exception
- # is handled by our excepthook, rather than the default
- # one which is reenabled after this script finishes.
- sys.stdout.close()
-
- vm_accuracy = shared_val_accuracy()
- show_shared_val_accuracy( vm_accuracy )
-
projects / oweals / gnunet.git / commitdiff