+++ /dev/null
-#!/usr/bin/python
-#
-# top-like utility for displaying kvm statistics
-#
-# Copyright 2006-2008 Qumranet Technologies
-# Copyright 2008-2011 Red Hat, Inc.
-#
-# Authors:
-# Avi Kivity <avi@redhat.com>
-#
-# This work is licensed under the terms of the GNU GPL, version 2. See
-# the COPYING file in the top-level directory.
-
-import curses
-import sys
-import os
-import time
-import optparse
-import ctypes
-import fcntl
-import resource
-import struct
-import re
-from collections import defaultdict
-from time import sleep
-
-VMX_EXIT_REASONS = {
- 'EXCEPTION_NMI': 0,
- 'EXTERNAL_INTERRUPT': 1,
- 'TRIPLE_FAULT': 2,
- 'PENDING_INTERRUPT': 7,
- 'NMI_WINDOW': 8,
- 'TASK_SWITCH': 9,
- 'CPUID': 10,
- 'HLT': 12,
- 'INVLPG': 14,
- 'RDPMC': 15,
- 'RDTSC': 16,
- 'VMCALL': 18,
- 'VMCLEAR': 19,
- 'VMLAUNCH': 20,
- 'VMPTRLD': 21,
- 'VMPTRST': 22,
- 'VMREAD': 23,
- 'VMRESUME': 24,
- 'VMWRITE': 25,
- 'VMOFF': 26,
- 'VMON': 27,
- 'CR_ACCESS': 28,
- 'DR_ACCESS': 29,
- 'IO_INSTRUCTION': 30,
- 'MSR_READ': 31,
- 'MSR_WRITE': 32,
- 'INVALID_STATE': 33,
- 'MWAIT_INSTRUCTION': 36,
- 'MONITOR_INSTRUCTION': 39,
- 'PAUSE_INSTRUCTION': 40,
- 'MCE_DURING_VMENTRY': 41,
- 'TPR_BELOW_THRESHOLD': 43,
- 'APIC_ACCESS': 44,
- 'EPT_VIOLATION': 48,
- 'EPT_MISCONFIG': 49,
- 'WBINVD': 54,
- 'XSETBV': 55,
- 'APIC_WRITE': 56,
- 'INVPCID': 58,
-}
-
-SVM_EXIT_REASONS = {
- 'READ_CR0': 0x000,
- 'READ_CR3': 0x003,
- 'READ_CR4': 0x004,
- 'READ_CR8': 0x008,
- 'WRITE_CR0': 0x010,
- 'WRITE_CR3': 0x013,
- 'WRITE_CR4': 0x014,
- 'WRITE_CR8': 0x018,
- 'READ_DR0': 0x020,
- 'READ_DR1': 0x021,
- 'READ_DR2': 0x022,
- 'READ_DR3': 0x023,
- 'READ_DR4': 0x024,
- 'READ_DR5': 0x025,
- 'READ_DR6': 0x026,
- 'READ_DR7': 0x027,
- 'WRITE_DR0': 0x030,
- 'WRITE_DR1': 0x031,
- 'WRITE_DR2': 0x032,
- 'WRITE_DR3': 0x033,
- 'WRITE_DR4': 0x034,
- 'WRITE_DR5': 0x035,
- 'WRITE_DR6': 0x036,
- 'WRITE_DR7': 0x037,
- 'EXCP_BASE': 0x040,
- 'INTR': 0x060,
- 'NMI': 0x061,
- 'SMI': 0x062,
- 'INIT': 0x063,
- 'VINTR': 0x064,
- 'CR0_SEL_WRITE': 0x065,
- 'IDTR_READ': 0x066,
- 'GDTR_READ': 0x067,
- 'LDTR_READ': 0x068,
- 'TR_READ': 0x069,
- 'IDTR_WRITE': 0x06a,
- 'GDTR_WRITE': 0x06b,
- 'LDTR_WRITE': 0x06c,
- 'TR_WRITE': 0x06d,
- 'RDTSC': 0x06e,
- 'RDPMC': 0x06f,
- 'PUSHF': 0x070,
- 'POPF': 0x071,
- 'CPUID': 0x072,
- 'RSM': 0x073,
- 'IRET': 0x074,
- 'SWINT': 0x075,
- 'INVD': 0x076,
- 'PAUSE': 0x077,
- 'HLT': 0x078,
- 'INVLPG': 0x079,
- 'INVLPGA': 0x07a,
- 'IOIO': 0x07b,
- 'MSR': 0x07c,
- 'TASK_SWITCH': 0x07d,
- 'FERR_FREEZE': 0x07e,
- 'SHUTDOWN': 0x07f,
- 'VMRUN': 0x080,
- 'VMMCALL': 0x081,
- 'VMLOAD': 0x082,
- 'VMSAVE': 0x083,
- 'STGI': 0x084,
- 'CLGI': 0x085,
- 'SKINIT': 0x086,
- 'RDTSCP': 0x087,
- 'ICEBP': 0x088,
- 'WBINVD': 0x089,
- 'MONITOR': 0x08a,
- 'MWAIT': 0x08b,
- 'MWAIT_COND': 0x08c,
- 'XSETBV': 0x08d,
- 'NPF': 0x400,
-}
-
-# EC definition of HSR (from arch/arm64/include/asm/kvm_arm.h)
-AARCH64_EXIT_REASONS = {
- 'UNKNOWN': 0x00,
- 'WFI': 0x01,
- 'CP15_32': 0x03,
- 'CP15_64': 0x04,
- 'CP14_MR': 0x05,
- 'CP14_LS': 0x06,
- 'FP_ASIMD': 0x07,
- 'CP10_ID': 0x08,
- 'CP14_64': 0x0C,
- 'ILL_ISS': 0x0E,
- 'SVC32': 0x11,
- 'HVC32': 0x12,
- 'SMC32': 0x13,
- 'SVC64': 0x15,
- 'HVC64': 0x16,
- 'SMC64': 0x17,
- 'SYS64': 0x18,
- 'IABT': 0x20,
- 'IABT_HYP': 0x21,
- 'PC_ALIGN': 0x22,
- 'DABT': 0x24,
- 'DABT_HYP': 0x25,
- 'SP_ALIGN': 0x26,
- 'FP_EXC32': 0x28,
- 'FP_EXC64': 0x2C,
- 'SERROR': 0x2F,
- 'BREAKPT': 0x30,
- 'BREAKPT_HYP': 0x31,
- 'SOFTSTP': 0x32,
- 'SOFTSTP_HYP': 0x33,
- 'WATCHPT': 0x34,
- 'WATCHPT_HYP': 0x35,
- 'BKPT32': 0x38,
- 'VECTOR32': 0x3A,
- 'BRK64': 0x3C,
-}
-
-# From include/uapi/linux/kvm.h, KVM_EXIT_xxx
-USERSPACE_EXIT_REASONS = {
- 'UNKNOWN': 0,
- 'EXCEPTION': 1,
- 'IO': 2,
- 'HYPERCALL': 3,
- 'DEBUG': 4,
- 'HLT': 5,
- 'MMIO': 6,
- 'IRQ_WINDOW_OPEN': 7,
- 'SHUTDOWN': 8,
- 'FAIL_ENTRY': 9,
- 'INTR': 10,
- 'SET_TPR': 11,
- 'TPR_ACCESS': 12,
- 'S390_SIEIC': 13,
- 'S390_RESET': 14,
- 'DCR': 15,
- 'NMI': 16,
- 'INTERNAL_ERROR': 17,
- 'OSI': 18,
- 'PAPR_HCALL': 19,
- 'S390_UCONTROL': 20,
- 'WATCHDOG': 21,
- 'S390_TSCH': 22,
- 'EPR': 23,
- 'SYSTEM_EVENT': 24,
-}
-
-IOCTL_NUMBERS = {
- 'SET_FILTER': 0x40082406,
- 'ENABLE': 0x00002400,
- 'DISABLE': 0x00002401,
- 'RESET': 0x00002403,
-}
-
-class Arch(object):
- """Class that encapsulates global architecture specific data like
- syscall and ioctl numbers.
-
- """
- @staticmethod
- def get_arch():
- machine = os.uname()[4]
-
- if machine.startswith('ppc'):
- return ArchPPC()
- elif machine.startswith('aarch64'):
- return ArchA64()
- elif machine.startswith('s390'):
- return ArchS390()
- else:
- # X86_64
- for line in open('/proc/cpuinfo'):
- if not line.startswith('flags'):
- continue
-
- flags = line.split()
- if 'vmx' in flags:
- return ArchX86(VMX_EXIT_REASONS)
- if 'svm' in flags:
- return ArchX86(SVM_EXIT_REASONS)
- return
-
-class ArchX86(Arch):
- def __init__(self, exit_reasons):
- self.sc_perf_evt_open = 298
- self.ioctl_numbers = IOCTL_NUMBERS
- self.exit_reasons = exit_reasons
-
-class ArchPPC(Arch):
- def __init__(self):
- self.sc_perf_evt_open = 319
- self.ioctl_numbers = IOCTL_NUMBERS
- self.ioctl_numbers['ENABLE'] = 0x20002400
- self.ioctl_numbers['DISABLE'] = 0x20002401
-
- # PPC comes in 32 and 64 bit and some generated ioctl
- # numbers depend on the wordsize.
- char_ptr_size = ctypes.sizeof(ctypes.c_char_p)
- self.ioctl_numbers['SET_FILTER'] = 0x80002406 | char_ptr_size << 16
-
-class ArchA64(Arch):
- def __init__(self):
- self.sc_perf_evt_open = 241
- self.ioctl_numbers = IOCTL_NUMBERS
- self.exit_reasons = AARCH64_EXIT_REASONS
-
-class ArchS390(Arch):
- def __init__(self):
- self.sc_perf_evt_open = 331
- self.ioctl_numbers = IOCTL_NUMBERS
- self.exit_reasons = None
-
-ARCH = Arch.get_arch()
-
-
-def walkdir(path):
- """Returns os.walk() data for specified directory.
-
- As it is only a wrapper it returns the same 3-tuple of (dirpath,
- dirnames, filenames).
- """
- return next(os.walk(path))
-
-
-def parse_int_list(list_string):
- """Returns an int list from a string of comma separated integers and
- integer ranges."""
- integers = []
- members = list_string.split(',')
-
- for member in members:
- if '-' not in member:
- integers.append(int(member))
- else:
- int_range = member.split('-')
- integers.extend(range(int(int_range[0]),
- int(int_range[1]) + 1))
-
- return integers
-
-
-def get_online_cpus():
- with open('/sys/devices/system/cpu/online') as cpu_list:
- cpu_string = cpu_list.readline()
- return parse_int_list(cpu_string)
-
-
-def get_filters():
- filters = {}
- filters['kvm_userspace_exit'] = ('reason', USERSPACE_EXIT_REASONS)
- if ARCH.exit_reasons:
- filters['kvm_exit'] = ('exit_reason', ARCH.exit_reasons)
- return filters
-
-libc = ctypes.CDLL('libc.so.6', use_errno=True)
-syscall = libc.syscall
-
-class perf_event_attr(ctypes.Structure):
- _fields_ = [('type', ctypes.c_uint32),
- ('size', ctypes.c_uint32),
- ('config', ctypes.c_uint64),
- ('sample_freq', ctypes.c_uint64),
- ('sample_type', ctypes.c_uint64),
- ('read_format', ctypes.c_uint64),
- ('flags', ctypes.c_uint64),
- ('wakeup_events', ctypes.c_uint32),
- ('bp_type', ctypes.c_uint32),
- ('bp_addr', ctypes.c_uint64),
- ('bp_len', ctypes.c_uint64),
- ]
-
- def __init__(self):
- super(self.__class__, self).__init__()
- self.type = PERF_TYPE_TRACEPOINT
- self.size = ctypes.sizeof(self)
- self.read_format = PERF_FORMAT_GROUP
-
-def perf_event_open(attr, pid, cpu, group_fd, flags):
- return syscall(ARCH.sc_perf_evt_open, ctypes.pointer(attr),
- ctypes.c_int(pid), ctypes.c_int(cpu),
- ctypes.c_int(group_fd), ctypes.c_long(flags))
-
-PERF_TYPE_TRACEPOINT = 2
-PERF_FORMAT_GROUP = 1 << 3
-
-PATH_DEBUGFS_TRACING = '/sys/kernel/debug/tracing'
-PATH_DEBUGFS_KVM = '/sys/kernel/debug/kvm'
-
-class Group(object):
- def __init__(self):
- self.events = []
-
- def add_event(self, event):
- self.events.append(event)
-
- def read(self):
- length = 8 * (1 + len(self.events))
- read_format = 'xxxxxxxx' + 'Q' * len(self.events)
- return dict(zip([event.name for event in self.events],
- struct.unpack(read_format,
- os.read(self.events[0].fd, length))))
-
-class Event(object):
- def __init__(self, name, group, trace_cpu, trace_point, trace_filter,
- trace_set='kvm'):
- self.name = name
- self.fd = None
- self.setup_event(group, trace_cpu, trace_point, trace_filter,
- trace_set)
-
- def setup_event_attribute(self, trace_set, trace_point):
- id_path = os.path.join(PATH_DEBUGFS_TRACING, 'events', trace_set,
- trace_point, 'id')
-
- event_attr = perf_event_attr()
- event_attr.config = int(open(id_path).read())
- return event_attr
-
- def setup_event(self, group, trace_cpu, trace_point, trace_filter,
- trace_set):
- event_attr = self.setup_event_attribute(trace_set, trace_point)
-
- group_leader = -1
- if group.events:
- group_leader = group.events[0].fd
-
- fd = perf_event_open(event_attr, -1, trace_cpu,
- group_leader, 0)
- if fd == -1:
- err = ctypes.get_errno()
- raise OSError(err, os.strerror(err),
- 'while calling sys_perf_event_open().')
-
- if trace_filter:
- fcntl.ioctl(fd, ARCH.ioctl_numbers['SET_FILTER'],
- trace_filter)
-
- self.fd = fd
-
- def enable(self):
- fcntl.ioctl(self.fd, ARCH.ioctl_numbers['ENABLE'], 0)
-
- def disable(self):
- fcntl.ioctl(self.fd, ARCH.ioctl_numbers['DISABLE'], 0)
-
- def reset(self):
- fcntl.ioctl(self.fd, ARCH.ioctl_numbers['RESET'], 0)
-
-class TracepointProvider(object):
- def __init__(self):
- self.group_leaders = []
- self.filters = get_filters()
- self._fields = self.get_available_fields()
- self.setup_traces()
- self.fields = self._fields
-
- def get_available_fields(self):
- path = os.path.join(PATH_DEBUGFS_TRACING, 'events', 'kvm')
- fields = walkdir(path)[1]
- extra = []
- for field in fields:
- if field in self.filters:
- filter_name_, filter_dicts = self.filters[field]
- for name in filter_dicts:
- extra.append(field + '(' + name + ')')
- fields += extra
- return fields
-
- def setup_traces(self):
- cpus = get_online_cpus()
-
- # The constant is needed as a buffer for python libs, std
- # streams and other files that the script opens.
- newlim = len(cpus) * len(self._fields) + 50
- try:
- softlim_, hardlim = resource.getrlimit(resource.RLIMIT_NOFILE)
-
- if hardlim < newlim:
- # Now we need CAP_SYS_RESOURCE, to increase the hard limit.
- resource.setrlimit(resource.RLIMIT_NOFILE, (newlim, newlim))
- else:
- # Raising the soft limit is sufficient.
- resource.setrlimit(resource.RLIMIT_NOFILE, (newlim, hardlim))
-
- except ValueError:
- sys.exit("NOFILE rlimit could not be raised to {0}".format(newlim))
-
- for cpu in cpus:
- group = Group()
- for name in self._fields:
- tracepoint = name
- tracefilter = None
- match = re.match(r'(.*)\((.*)\)', name)
- if match:
- tracepoint, sub = match.groups()
- tracefilter = ('%s==%d\0' %
- (self.filters[tracepoint][0],
- self.filters[tracepoint][1][sub]))
-
- group.add_event(Event(name=name,
- group=group,
- trace_cpu=cpu,
- trace_point=tracepoint,
- trace_filter=tracefilter))
- self.group_leaders.append(group)
-
- def available_fields(self):
- return self.get_available_fields()
-
- @property
- def fields(self):
- return self._fields
-
- @fields.setter
- def fields(self, fields):
- self._fields = fields
- for group in self.group_leaders:
- for index, event in enumerate(group.events):
- if event.name in fields:
- event.reset()
- event.enable()
- else:
- # Do not disable the group leader.
- # It would disable all of its events.
- if index != 0:
- event.disable()
-
- def read(self):
- ret = defaultdict(int)
- for group in self.group_leaders:
- for name, val in group.read().iteritems():
- if name in self._fields:
- ret[name] += val
- return ret
-
-class DebugfsProvider(object):
- def __init__(self):
- self._fields = self.get_available_fields()
-
- def get_available_fields(self):
- return walkdir(PATH_DEBUGFS_KVM)[2]
-
- @property
- def fields(self):
- return self._fields
-
- @fields.setter
- def fields(self, fields):
- self._fields = fields
-
- def read(self):
- def val(key):
- return int(file(PATH_DEBUGFS_KVM + '/' + key).read())
- return dict([(key, val(key)) for key in self._fields])
-
-class Stats(object):
- def __init__(self, providers, fields=None):
- self.providers = providers
- self._fields_filter = fields
- self.values = {}
- self.update_provider_filters()
-
- def update_provider_filters(self):
- def wanted(key):
- if not self._fields_filter:
- return True
- return re.match(self._fields_filter, key) is not None
-
- # As we reset the counters when updating the fields we can
- # also clear the cache of old values.
- self.values = {}
- for provider in self.providers:
- provider_fields = [key for key in provider.get_available_fields()
- if wanted(key)]
- provider.fields = provider_fields
-
- @property
- def fields_filter(self):
- return self._fields_filter
-
- @fields_filter.setter
- def fields_filter(self, fields_filter):
- self._fields_filter = fields_filter
- self.update_provider_filters()
-
- def get(self):
- for provider in self.providers:
- new = provider.read()
- for key in provider.fields:
- oldval = self.values.get(key, (0, 0))
- newval = new.get(key, 0)
- newdelta = None
- if oldval is not None:
- newdelta = newval - oldval[0]
- self.values[key] = (newval, newdelta)
- return self.values
-
-LABEL_WIDTH = 40
-NUMBER_WIDTH = 10
-
-class Tui(object):
- def __init__(self, stats):
- self.stats = stats
- self.screen = None
- self.drilldown = False
- self.update_drilldown()
-
- def __enter__(self):
- """Initialises curses for later use. Based on curses.wrapper
- implementation from the Python standard library."""
- self.screen = curses.initscr()
- curses.noecho()
- curses.cbreak()
-
- # The try/catch works around a minor bit of
- # over-conscientiousness in the curses module, the error
- # return from C start_color() is ignorable.
- try:
- curses.start_color()
- except:
- pass
-
- curses.use_default_colors()
- return self
-
- def __exit__(self, *exception):
- """Resets the terminal to its normal state. Based on curses.wrappre
- implementation from the Python standard library."""
- if self.screen:
- self.screen.keypad(0)
- curses.echo()
- curses.nocbreak()
- curses.endwin()
-
- def update_drilldown(self):
- if not self.stats.fields_filter:
- self.stats.fields_filter = r'^[^\(]*$'
-
- elif self.stats.fields_filter == r'^[^\(]*$':
- self.stats.fields_filter = None
-
- def refresh(self, sleeptime):
- self.screen.erase()
- self.screen.addstr(0, 0, 'kvm statistics - summary', curses.A_BOLD)
- self.screen.addstr(2, 1, 'Event')
- self.screen.addstr(2, 1 + LABEL_WIDTH + NUMBER_WIDTH -
- len('Total'), 'Total')
- self.screen.addstr(2, 1 + LABEL_WIDTH + NUMBER_WIDTH + 8 -
- len('Current'), 'Current')
- row = 3
- stats = self.stats.get()
- def sortkey(x):
- if stats[x][1]:
- return (-stats[x][1], -stats[x][0])
- else:
- return (0, -stats[x][0])
- for key in sorted(stats.keys(), key=sortkey):
-
- if row >= self.screen.getmaxyx()[0]:
- break
- values = stats[key]
- if not values[0] and not values[1]:
- break
- col = 1
- self.screen.addstr(row, col, key)
- col += LABEL_WIDTH
- self.screen.addstr(row, col, '%10d' % (values[0],))
- col += NUMBER_WIDTH
- if values[1] is not None:
- self.screen.addstr(row, col, '%8d' % (values[1] / sleeptime,))
- row += 1
- self.screen.refresh()
-
- def show_filter_selection(self):
- while True:
- self.screen.erase()
- self.screen.addstr(0, 0,
- "Show statistics for events matching a regex.",
- curses.A_BOLD)
- self.screen.addstr(2, 0,
- "Current regex: {0}"
- .format(self.stats.fields_filter))
- self.screen.addstr(3, 0, "New regex: ")
- curses.echo()
- regex = self.screen.getstr()
- curses.noecho()
- if len(regex) == 0:
- return
- try:
- re.compile(regex)
- self.stats.fields_filter = regex
- return
- except re.error:
- continue
-
- def show_stats(self):
- sleeptime = 0.25
- while True:
- self.refresh(sleeptime)
- curses.halfdelay(int(sleeptime * 10))
- sleeptime = 3
- try:
- char = self.screen.getkey()
- if char == 'x':
- self.drilldown = not self.drilldown
- self.update_drilldown()
- if char == 'q':
- break
- if char == 'f':
- self.show_filter_selection()
- except KeyboardInterrupt:
- break
- except curses.error:
- continue
-
-def batch(stats):
- s = stats.get()
- time.sleep(1)
- s = stats.get()
- for key in sorted(s.keys()):
- values = s[key]
- print '%-42s%10d%10d' % (key, values[0], values[1])
-
-def log(stats):
- keys = sorted(stats.get().iterkeys())
- def banner():
- for k in keys:
- print '%s' % k,
- print
- def statline():
- s = stats.get()
- for k in keys:
- print ' %9d' % s[k][1],
- print
- line = 0
- banner_repeat = 20
- while True:
- time.sleep(1)
- if line % banner_repeat == 0:
- banner()
- statline()
- line += 1
-
-def get_options():
- description_text = """
-This script displays various statistics about VMs running under KVM.
-The statistics are gathered from the KVM debugfs entries and / or the
-currently available perf traces.
-
-The monitoring takes additional cpu cycles and might affect the VM's
-performance.
-
-Requirements:
-- Access to:
- /sys/kernel/debug/kvm
- /sys/kernel/debug/trace/events/*
- /proc/pid/task
-- /proc/sys/kernel/perf_event_paranoid < 1 if user has no
- CAP_SYS_ADMIN and perf events are used.
-- CAP_SYS_RESOURCE if the hard limit is not high enough to allow
- the large number of files that are possibly opened.
-"""
-
- class PlainHelpFormatter(optparse.IndentedHelpFormatter):
- def format_description(self, description):
- if description:
- return description + "\n"
- else:
- return ""
-
- optparser = optparse.OptionParser(description=description_text,
- formatter=PlainHelpFormatter())
- optparser.add_option('-1', '--once', '--batch',
- action='store_true',
- default=False,
- dest='once',
- help='run in batch mode for one second',
- )
- optparser.add_option('-l', '--log',
- action='store_true',
- default=False,
- dest='log',
- help='run in logging mode (like vmstat)',
- )
- optparser.add_option('-t', '--tracepoints',
- action='store_true',
- default=False,
- dest='tracepoints',
- help='retrieve statistics from tracepoints',
- )
- optparser.add_option('-d', '--debugfs',
- action='store_true',
- default=False,
- dest='debugfs',
- help='retrieve statistics from debugfs',
- )
- optparser.add_option('-f', '--fields',
- action='store',
- default=None,
- dest='fields',
- help='fields to display (regex)',
- )
- (options, _) = optparser.parse_args(sys.argv)
- return options
-
-def get_providers(options):
- providers = []
-
- if options.tracepoints:
- providers.append(TracepointProvider())
- if options.debugfs:
- providers.append(DebugfsProvider())
- if len(providers) == 0:
- providers.append(TracepointProvider())
-
- return providers
-
-def check_access(options):
- if not os.path.exists('/sys/kernel/debug'):
- sys.stderr.write('Please enable CONFIG_DEBUG_FS in your kernel.')
- sys.exit(1)
-
- if not os.path.exists(PATH_DEBUGFS_KVM):
- sys.stderr.write("Please make sure, that debugfs is mounted and "
- "readable by the current user:\n"
- "('mount -t debugfs debugfs /sys/kernel/debug')\n"
- "Also ensure, that the kvm modules are loaded.\n")
- sys.exit(1)
-
- if not os.path.exists(PATH_DEBUGFS_TRACING) and (options.tracepoints
- or not options.debugfs):
- sys.stderr.write("Please enable CONFIG_TRACING in your kernel "
- "when using the option -t (default).\n"
- "If it is enabled, make {0} readable by the "
- "current user.\n"
- .format(PATH_DEBUGFS_TRACING))
- if options.tracepoints:
- sys.exit(1)
-
- sys.stderr.write("Falling back to debugfs statistics!\n")
- options.debugfs = True
- sleep(5)
-
- return options
-
-def main():
- options = get_options()
- options = check_access(options)
- providers = get_providers(options)
- stats = Stats(providers, fields=options.fields)
-
- if options.log:
- log(stats)
- elif not options.once:
- with Tui(stats) as tui:
- tui.show_stats()
- else:
- batch(stats)
-
-if __name__ == "__main__":
- main()
projects / sdk / emulator / qemu.git / commitdiff