Quelle  compaction-times.py   Sprache: Python

# report time spent in compaction
# Licensed under the terms of the GNU GPL License version 2

# testing:
# 'echo 1 > /proc/sys/vm/compact_memory' to force compaction of all zones

import os
import sys
import re

import signal
signal.signal(signal.SIGPIPE, signal.SIG_DFL)

usage = "usage: perf script report compaction-times.py -- [-h] [-u] [-p|-pv] [-t | [-m] [-fs] [-ms]] [pid|pid-range|comm-regex]\n"

class popt:
 DISP_DFL = 0
 DISP_PROC = 1
 DISP_PROC_VERBOSE=2

class topt:
 DISP_TIME = 0
 DISP_MIG = 1
 DISP_ISOLFREE = 2
 DISP_ISOLMIG = 4
 DISP_ALL = 7

class comm_filter:
 def __init__(self, re):
  self.re = re

 def filter(self, pid, comm):
  m = self.re.search(comm)
  return m == None or m.group() == ""

class pid_filter:
 def __init__(self, low, high):
  self.low = (0 if low == "" else int(low))
  self.high = (0 if high == "" else int(high))

 def filter(self, pid, comm):
  return not (pid >= self.low and (self.high == 0 or pid <= self.high))

def set_type(t):
 global opt_disp
 opt_disp = (t if opt_disp == topt.DISP_ALL else opt_disp|t)

def ns(sec, nsec):
 return (sec * 1000000000) + nsec

def time(ns):
 return "%dns" % ns if opt_ns else "%dus" % (round(ns, -3) / 1000)

class pair:
 def __init__(self, aval, bval, alabel = None, blabel = None):
  self.alabel = alabel
  self.blabel = blabel
  self.aval = aval
  self.bval = bval

 def __add__(self, rhs):
  self.aval += rhs.aval
  self.bval += rhs.bval
  return self

 def __str__(self):
  return "%s=%d %s=%d" % (self.alabel, self.aval, self.blabel, self.bval)

class cnode:
 def __init__(self, ns):
  self.ns = ns
  self.migrated = pair(0, 0, "moved", "failed")
  self.fscan = pair(0,0, "scanned", "isolated")
  self.mscan = pair(0,0, "scanned", "isolated")

 def __add__(self, rhs):
  self.ns += rhs.ns
  self.migrated += rhs.migrated
  self.fscan += rhs.fscan
  self.mscan += rhs.mscan
  return self

 def __str__(self):
  prev = 0
  s = "%s " % time(self.ns)
  if (opt_disp & topt.DISP_MIG):
   s += "migration: %s" % self.migrated
   prev = 1
  if (opt_disp & topt.DISP_ISOLFREE):
   s += "%sfree_scanner: %s" % (" " if prev else "", self.fscan)
   prev = 1
  if (opt_disp & topt.DISP_ISOLMIG):
   s += "%smigration_scanner: %s" % (" " if prev else "", self.mscan)
  return s

 def complete(self, secs, nsecs):
  self.ns = ns(secs, nsecs) - self.ns

 def increment(self, migrated, fscan, mscan):
  if (migrated != None):
   self.migrated += migrated
  if (fscan != None):
   self.fscan += fscan
  if (mscan != None):
   self.mscan += mscan


class chead:
 heads = {}
 val = cnode(0);
 fobj = None

 @classmethod
 def add_filter(cls, filter):
  cls.fobj = filter

 @classmethod
 def create_pending(cls, pid, comm, start_secs, start_nsecs):
  filtered = 0
  try:
   head = cls.heads[pid]
   filtered = head.is_filtered()
  except KeyError:
   if cls.fobj != None:
    filtered = cls.fobj.filter(pid, comm)
   head = cls.heads[pid] = chead(comm, pid, filtered)

  if not filtered:
   head.mark_pending(start_secs, start_nsecs)

 @classmethod
 def increment_pending(cls, pid, migrated, fscan, mscan):
  head = cls.heads[pid]
  if not head.is_filtered():
   if head.is_pending():
    head.do_increment(migrated, fscan, mscan)
   else:
    sys.stderr.write("missing start compaction event for pid %d\n" % pid)

 @classmethod
 def complete_pending(cls, pid, secs, nsecs):
  head = cls.heads[pid]
  if not head.is_filtered():
   if head.is_pending():
    head.make_complete(secs, nsecs)
   else:
    sys.stderr.write("missing start compaction event for pid %d\n" % pid)

 @classmethod
 def gen(cls):
  if opt_proc != popt.DISP_DFL:
   for i in cls.heads:
    yield cls.heads[i]

 @classmethod
 def str(cls):
  return cls.val

 def __init__(self, comm, pid, filtered):
  self.comm = comm
  self.pid = pid
  self.val = cnode(0)
  self.pending = None
  self.filtered = filtered
  self.list = []

 def __add__(self, rhs):
  self.ns += rhs.ns
  self.val += rhs.val
  return self

 def mark_pending(self, secs, nsecs):
  self.pending = cnode(ns(secs, nsecs))

 def do_increment(self, migrated, fscan, mscan):
  self.pending.increment(migrated, fscan, mscan)

 def make_complete(self, secs, nsecs):
  self.pending.complete(secs, nsecs)
  chead.val += self.pending

  if opt_proc != popt.DISP_DFL:
   self.val += self.pending

   if opt_proc == popt.DISP_PROC_VERBOSE:
    self.list.append(self.pending)
  self.pending = None

 def enumerate(self):
  if opt_proc == popt.DISP_PROC_VERBOSE and not self.is_filtered():
   for i, pelem in enumerate(self.list):
    sys.stdout.write("%d[%s].%d: %s\n" % (self.pid, self.comm, i+1, pelem))

 def is_pending(self):
  return self.pending != None

 def is_filtered(self):
  return self.filtered

 def display(self):
  if not self.is_filtered():
   sys.stdout.write("%d[%s]: %s\n" % (self.pid, self.comm, self.val))


def trace_end():
 sys.stdout.write("total: %s\n" % chead.str())
 for i in chead.gen():
  i.display(),
  i.enumerate()

def compaction__mm_compaction_migratepages(event_name, context, common_cpu,
 common_secs, common_nsecs, common_pid, common_comm,
 common_callchain, nr_migrated, nr_failed):

 chead.increment_pending(common_pid,
  pair(nr_migrated, nr_failed), None, None)

def compaction__mm_compaction_isolate_freepages(event_name, context, common_cpu,
 common_secs, common_nsecs, common_pid, common_comm,
 common_callchain, start_pfn, end_pfn, nr_scanned, nr_taken):

 chead.increment_pending(common_pid,
  None, pair(nr_scanned, nr_taken), None)

def compaction__mm_compaction_isolate_migratepages(event_name, context, common_cpu,
 common_secs, common_nsecs, common_pid, common_comm,
 common_callchain, start_pfn, end_pfn, nr_scanned, nr_taken):

 chead.increment_pending(common_pid,
  None, None, pair(nr_scanned, nr_taken))

def compaction__mm_compaction_end(event_name, context, common_cpu,
 common_secs, common_nsecs, common_pid, common_comm,
 common_callchain, zone_start, migrate_start, free_start, zone_end,
 sync, status):

 chead.complete_pending(common_pid, common_secs, common_nsecs)

def compaction__mm_compaction_begin(event_name, context, common_cpu,
 common_secs, common_nsecs, common_pid, common_comm,
 common_callchain, zone_start, migrate_start, free_start, zone_end,
 sync):

 chead.create_pending(common_pid, common_comm, common_secs, common_nsecs)

def pr_help():
 global usage

 sys.stdout.write(usage)
 sys.stdout.write("\n")
 sys.stdout.write("-h display this help\n")
 sys.stdout.write("-p display by process\n")
 sys.stdout.write("-pv display by process (verbose)\n")
 sys.stdout.write("-t display stall times only\n")
 sys.stdout.write("-m display stats for migration\n")
 sys.stdout.write("-fs display stats for free scanner\n")
 sys.stdout.write("-ms display stats for migration scanner\n")
 sys.stdout.write("-u display results in microseconds (default nanoseconds)\n")


comm_re = None
pid_re = None
pid_regex = r"^(\d*)-(\d*)$|^(\d*)$"

opt_proc = popt.DISP_DFL
opt_disp = topt.DISP_ALL

opt_ns = True

argc = len(sys.argv) - 1
if argc >= 1:
 pid_re = re.compile(pid_regex)

 for i, opt in enumerate(sys.argv[1:]):
  if opt[0] == "-":
   if opt == "-h":
    pr_help()
    exit(0);
   elif opt == "-p":
    opt_proc = popt.DISP_PROC
   elif opt == "-pv":
    opt_proc = popt.DISP_PROC_VERBOSE
   elif opt == '-u':
    opt_ns = False
   elif opt == "-t":
    set_type(topt.DISP_TIME)
   elif opt == "-m":
    set_type(topt.DISP_MIG)
   elif opt == "-fs":
    set_type(topt.DISP_ISOLFREE)
   elif opt == "-ms":
    set_type(topt.DISP_ISOLMIG)
   else:
    sys.exit(usage)

  elif i == argc - 1:
   m = pid_re.search(opt)
   if m != None and m.group() != "":
    if m.group(3) != None:
     f = pid_filter(m.group(3), m.group(3))
    else:
     f = pid_filter(m.group(1), m.group(2))
   else:
    try:
     comm_re=re.compile(opt)
    except:
     sys.stderr.write("invalid regex '%s'" % opt)
     sys.exit(usage)
    f = comm_filter(comm_re)

   chead.add_filter(f)