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qemu-patch-raspberry4/scripts/kvm/kvm_stat
Janosch Frank 639ce18310 scripts/kvm/kvm_stat: Introduce main function 
The main function should be the main location for initialization and
helps encapsulating variables into a scope. This way they don't have
to be global and might be mistaken for local ones.

As the providers variable is scoped now it can't be accessed from
within the Stats class. Hence, the global access to the variable was
changed to a local one.

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-10-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00

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#!/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
class DebugfsProvider(object):
def __init__(self):
self._fields = walkdir(PATH_DEBUGFS_KVM)[2]
def fields(self):
return self._fields
def select(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])
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,
}
X86_EXIT_REASONS = {
'vmx': VMX_EXIT_REASONS,
'svm': SVM_EXIT_REASONS,
}
SC_PERF_EVT_OPEN = None
EXIT_REASONS = None
IOCTL_NUMBERS = {
'SET_FILTER' : 0x40082406,
'ENABLE' : 0x00002400,
'DISABLE' : 0x00002401,
'RESET' : 0x00002403,
}
def x86_init(flag):
global SC_PERF_EVT_OPEN
global EXIT_REASONS
SC_PERF_EVT_OPEN = 298
EXIT_REASONS = X86_EXIT_REASONS[flag]
def s390_init():
global SC_PERF_EVT_OPEN
SC_PERF_EVT_OPEN = 331
def ppc_init():
global SC_PERF_EVT_OPEN
global IOCTL_NUMBERS
SC_PERF_EVT_OPEN = 319
IOCTL_NUMBERS['ENABLE'] = 0x20002400
IOCTL_NUMBERS['DISABLE'] = 0x20002401
IOCTL_NUMBERS['SET_FILTER'] = 0x80002406 | (ctypes.sizeof(ctypes.c_char_p)
<< 16)
def aarch64_init():
global SC_PERF_EVT_OPEN
global EXIT_REASONS
SC_PERF_EVT_OPEN = 241
EXIT_REASONS = AARCH64_EXIT_REASONS
def detect_platform():
if os.uname()[4].startswith('ppc'):
ppc_init()
return
elif os.uname()[4].startswith('aarch64'):
aarch64_init()
return
for line in file('/proc/cpuinfo').readlines():
if line.startswith('flags'):
for flag in line.split():
if flag in X86_EXIT_REASONS:
x86_init(flag)
return
elif line.startswith('vendor_id'):
for flag in line.split():
if flag == 'IBM/S390':
s390_init()
return
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))
filters = {}
filters['kvm_userspace_exit'] = ('reason', USERSPACE_EXIT_REASONS)
if EXIT_REASONS:
filters['kvm_exit'] = ('exit_reason', EXIT_REASONS)
libc = ctypes.CDLL('libc.so.6')
syscall = libc.syscall
get_errno = libc.__errno_location
get_errno.restype = ctypes.POINTER(ctypes.c_int)
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 _perf_event_open(attr, pid, cpu, group_fd, flags):
return syscall(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, cpu):
self.events = []
self.group_leader = None
self.cpu = cpu
def add_event(self, name, event_set, tracepoint, filter = None):
self.events.append(Event(group = self,
name = name, event_set = event_set,
tracepoint = tracepoint, filter = filter))
if len(self.events) == 1:
self.file = os.fdopen(self.events[0].fd)
def read(self):
bytes = 8 * (1 + len(self.events))
fmt = 'xxxxxxxx' + 'q' * len(self.events)
return dict(zip([event.name for event in self.events],
struct.unpack(fmt, self.file.read(bytes))))
class Event(object):
def __init__(self, group, name, event_set, tracepoint, filter = None):
self.name = name
attr = perf_event_attr()
attr.type = PERF_TYPE_TRACEPOINT
attr.size = ctypes.sizeof(attr)
id_path = os.path.join(PATH_DEBUGFS_TRACING, 'events', event_set,
tracepoint, 'id')
id = int(file(id_path).read())
attr.config = id
attr.sample_period = 1
attr.read_format = PERF_FORMAT_GROUP
group_leader = -1
if group.events:
group_leader = group.events[0].fd
fd = _perf_event_open(attr, -1, group.cpu, group_leader, 0)
if fd == -1:
err = get_errno()[0]
raise Exception('perf_event_open failed, errno = ' + err.__str__())
if filter:
fcntl.ioctl(fd, IOCTL_NUMBERS['SET_FILTER'], filter)
self.fd = fd
def enable(self):
fcntl.ioctl(self.fd, IOCTL_NUMBERS['ENABLE'], 0)
def disable(self):
fcntl.ioctl(self.fd, IOCTL_NUMBERS['DISABLE'], 0)
def reset(self):
fcntl.ioctl(self.fd, IOCTL_NUMBERS['RESET'], 0)
class TracepointProvider(object):
def __init__(self):
path = os.path.join(PATH_DEBUGFS_TRACING, 'events', 'kvm')
fields = walkdir(path)[1]
extra = []
for f in fields:
if f in filters:
subfield, values = filters[f]
for name, number in values.iteritems():
extra.append(f + '(' + name + ')')
fields += extra
self._setup(fields)
self.select(fields)
def fields(self):
return self._fields
def _online_cpus(self):
l = []
pattern = r'cpu([0-9]+)'
basedir = '/sys/devices/system/cpu'
for entry in os.listdir(basedir):
match = re.match(pattern, entry)
if not match:
continue
path = os.path.join(basedir, entry, 'online')
if os.path.exists(path) and open(path).read().strip() != '1':
continue
l.append(int(match.group(1)))
return l
def _setup(self, _fields):
self._fields = _fields
cpus = self._online_cpus()
nfiles = len(cpus) * 1000
resource.setrlimit(resource.RLIMIT_NOFILE, (nfiles, nfiles))
events = []
self.group_leaders = []
for cpu in cpus:
group = Group(cpu)
for name in _fields:
tracepoint = name
filter = None
m = re.match(r'(.*)\((.*)\)', name)
if m:
tracepoint, sub = m.groups()
filter = '%s==%d\0' % (filters[tracepoint][0],
filters[tracepoint][1][sub])
event = group.add_event(name, event_set = 'kvm',
tracepoint = tracepoint,
filter = filter)
self.group_leaders.append(group)
def select(self, fields):
for group in self.group_leaders:
for event in group.events:
if event.name in fields:
event.reset()
event.enable()
else:
event.disable()
def read(self):
ret = defaultdict(int)
for group in self.group_leaders:
for name, val in group.read().iteritems():
ret[name] += val
return ret
class Stats:
def __init__(self, providers, fields = None):
self.providers = providers
self.fields_filter = fields
self._update()
def _update(self):
def wanted(key):
if not self.fields_filter:
return True
return re.match(self.fields_filter, key) is not None
self.values = dict()
for d in self.providers:
provider_fields = [key for key in d.fields() if wanted(key)]
for key in provider_fields:
self.values[key] = None
d.select(provider_fields)
def set_fields_filter(self, fields_filter):
self.fields_filter = fields_filter
self._update()
def get(self):
for d in self.providers:
new = d.read()
for key in d.fields():
oldval = self.values.get(key, (0, 0))
newval = new[key]
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
def tui(screen, stats):
curses.use_default_colors()
curses.noecho()
drilldown = False
fields_filter = stats.fields_filter
def update_drilldown():
if not fields_filter:
if drilldown:
stats.set_fields_filter(None)
else:
stats.set_fields_filter(r'^[^\(]*$')
update_drilldown()
def refresh(sleeptime):
screen.erase()
screen.addstr(0, 0, 'kvm statistics')
screen.addstr(2, 1, 'Event')
screen.addstr(2, 1 + LABEL_WIDTH + NUMBER_WIDTH - len('Total'), 'Total')
screen.addstr(2, 1 + LABEL_WIDTH + NUMBER_WIDTH + 8 - len('Current'), 'Current')
row = 3
s = stats.get()
def sortkey(x):
if s[x][1]:
return (-s[x][1], -s[x][0])
else:
return (0, -s[x][0])
for key in sorted(s.keys(), key = sortkey):
if row >= screen.getmaxyx()[0]:
break
values = s[key]
if not values[0] and not values[1]:
break
col = 1
screen.addstr(row, col, key)
col += LABEL_WIDTH
screen.addstr(row, col, '%10d' % (values[0],))
col += NUMBER_WIDTH
if values[1] is not None:
screen.addstr(row, col, '%8d' % (values[1] / sleeptime,))
row += 1
screen.refresh()
sleeptime = 0.25
while True:
refresh(sleeptime)
curses.halfdelay(int(sleeptime * 10))
sleeptime = 3
try:
c = screen.getkey()
if c == 'x':
drilldown = not drilldown
update_drilldown()
if c == 'q':
break
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 '%-22s%10d%10d' % (key, values[0], values[1])
def log(stats):
keys = sorted(stats.get().iterkeys())
def banner():
for k in keys:
print '%10s' % k[0:9],
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():
optparser = optparse.OptionParser()
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():
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):
sys.stderr.write("Please make {0} readable by the current user.\n"
.format(PATH_DEBUGFS_TRACING))
sys.exit(1)
def main():
check_access()
detect_platform()
options = get_options()
providers = get_providers(options)
stats = Stats(providers, fields = options.fields)
if options.log:
log(stats)
elif not options.once:
curses.wrapper(tui, stats)
else:
batch(stats)
if __name__ == "__main__":
main()
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