scripts/kvm/kvm_stat

   1 #!/usr/bin/python
   2 #
   3 # top-like utility for displaying kvm statistics
   4 #
   5 # Copyright 2006-2008 Qumranet Technologies
   6 # Copyright 2008-2011 Red Hat, Inc.
   7 #
   8 # Authors:
   9 #  Avi Kivity <avi@redhat.com>
  10 #
  11 # This work is licensed under the terms of the GNU GPL, version 2.  See
  12 # the COPYING file in the top-level directory.
  13
  14 import curses
  15 import sys, os, time, optparse
  16
  17 class DebugfsProvider(object):
  18     def __init__(self):
  19         self.base = '/sys/kernel/debug/kvm'
  20         self._fields = os.listdir(self.base)
  21     def fields(self):
  22         return self._fields
  23     def select(self, fields):
  24         self._fields = fields
  25     def read(self):
  26         def val(key):
  27             return int(file(self.base + '/' + key).read())
  28         return dict([(key, val(key)) for key in self._fields])
  29
  30 vmx_exit_reasons = {
  31     0: 'EXCEPTION_NMI',
  32     1: 'EXTERNAL_INTERRUPT',
  33     2: 'TRIPLE_FAULT',
  34     7: 'PENDING_INTERRUPT',
  35     8: 'NMI_WINDOW',
  36     9: 'TASK_SWITCH',
  37     10: 'CPUID',
  38     12: 'HLT',
  39     14: 'INVLPG',
  40     15: 'RDPMC',
  41     16: 'RDTSC',
  42     18: 'VMCALL',
  43     19: 'VMCLEAR',
  44     20: 'VMLAUNCH',
  45     21: 'VMPTRLD',
  46     22: 'VMPTRST',
  47     23: 'VMREAD',
  48     24: 'VMRESUME',
  49     25: 'VMWRITE',
  50     26: 'VMOFF',
  51     27: 'VMON',
  52     28: 'CR_ACCESS',
  53     29: 'DR_ACCESS',
  54     30: 'IO_INSTRUCTION',
  55     31: 'MSR_READ',
  56     32: 'MSR_WRITE',
  57     33: 'INVALID_STATE',
  58     36: 'MWAIT_INSTRUCTION',
  59     39: 'MONITOR_INSTRUCTION',
  60     40: 'PAUSE_INSTRUCTION',
  61     41: 'MCE_DURING_VMENTRY',
  62     43: 'TPR_BELOW_THRESHOLD',
  63     44: 'APIC_ACCESS',
  64     48: 'EPT_VIOLATION',
  65     49: 'EPT_MISCONFIG',
  66     54: 'WBINVD',
  67     55: 'XSETBV',
  68 }
  69
  70 svm_exit_reasons = {
  71     0x000: 'READ_CR0',
  72     0x003: 'READ_CR3',
  73     0x004: 'READ_CR4',
  74     0x008: 'READ_CR8',
  75     0x010: 'WRITE_CR0',
  76     0x013: 'WRITE_CR3',
  77     0x014: 'WRITE_CR4',
  78     0x018: 'WRITE_CR8',
  79     0x020: 'READ_DR0',
  80     0x021: 'READ_DR1',
  81     0x022: 'READ_DR2',
  82     0x023: 'READ_DR3',
  83     0x024: 'READ_DR4',
  84     0x025: 'READ_DR5',
  85     0x026: 'READ_DR6',
  86     0x027: 'READ_DR7',
  87     0x030: 'WRITE_DR0',
  88     0x031: 'WRITE_DR1',
  89     0x032: 'WRITE_DR2',
  90     0x033: 'WRITE_DR3',
  91     0x034: 'WRITE_DR4',
  92     0x035: 'WRITE_DR5',
  93     0x036: 'WRITE_DR6',
  94     0x037: 'WRITE_DR7',
  95     0x040: 'EXCP_BASE',
  96     0x060: 'INTR',
  97     0x061: 'NMI',
  98     0x062: 'SMI',
  99     0x063: 'INIT',
 100     0x064: 'VINTR',
 101     0x065: 'CR0_SEL_WRITE',
 102     0x066: 'IDTR_READ',
 103     0x067: 'GDTR_READ',
 104     0x068: 'LDTR_READ',
 105     0x069: 'TR_READ',
 106     0x06a: 'IDTR_WRITE',
 107     0x06b: 'GDTR_WRITE',
 108     0x06c: 'LDTR_WRITE',
 109     0x06d: 'TR_WRITE',
 110     0x06e: 'RDTSC',
 111     0x06f: 'RDPMC',
 112     0x070: 'PUSHF',
 113     0x071: 'POPF',
 114     0x072: 'CPUID',
 115     0x073: 'RSM',
 116     0x074: 'IRET',
 117     0x075: 'SWINT',
 118     0x076: 'INVD',
 119     0x077: 'PAUSE',
 120     0x078: 'HLT',
 121     0x079: 'INVLPG',
 122     0x07a: 'INVLPGA',
 123     0x07b: 'IOIO',
 124     0x07c: 'MSR',
 125     0x07d: 'TASK_SWITCH',
 126     0x07e: 'FERR_FREEZE',
 127     0x07f: 'SHUTDOWN',
 128     0x080: 'VMRUN',
 129     0x081: 'VMMCALL',
 130     0x082: 'VMLOAD',
 131     0x083: 'VMSAVE',
 132     0x084: 'STGI',
 133     0x085: 'CLGI',
 134     0x086: 'SKINIT',
 135     0x087: 'RDTSCP',
 136     0x088: 'ICEBP',
 137     0x089: 'WBINVD',
 138     0x08a: 'MONITOR',
 139     0x08b: 'MWAIT',
 140     0x08c: 'MWAIT_COND',
 141     0x400: 'NPF',
 142 }
 143
 144 s390_exit_reasons = {
 145         0x000: 'UNKNOWN',
 146         0x001: 'EXCEPTION',
 147         0x002: 'IO',
 148         0x003: 'HYPERCALL',
 149         0x004: 'DEBUG',
 150         0x005: 'HLT',
 151         0x006: 'MMIO',
 152         0x007: 'IRQ_WINDOW_OPEN',
 153         0x008: 'SHUTDOWN',
 154         0x009: 'FAIL_ENTRY',
 155         0x010: 'INTR',
 156         0x011: 'SET_TPR',
 157         0x012: 'TPR_ACCESS',
 158         0x013: 'S390_SIEIC',
 159         0x014: 'S390_RESET',
 160         0x015: 'DCR',
 161         0x016: 'NMI',
 162         0x017: 'INTERNAL_ERROR',
 163         0x018: 'OSI',
 164         0x019: 'PAPR_HCALL',
 165 }
 166
 167 vendor_exit_reasons = {
 168     'vmx': vmx_exit_reasons,
 169     'svm': svm_exit_reasons,
 170     'IBM/S390': s390_exit_reasons,
 171 }
 172
 173 exit_reasons = None
 174
 175 for line in file('/proc/cpuinfo').readlines():
 176     if line.startswith('flags') or line.startswith('vendor_id'):
 177         for flag in line.split():
 178             if flag in vendor_exit_reasons:
 179                 exit_reasons = vendor_exit_reasons[flag]
 180
 181 filters = {
 182     'kvm_exit': ('exit_reason', exit_reasons)
 183 }
 184
 185 def invert(d):
 186     return dict((x[1], x[0]) for x in d.iteritems())
 187
 188 for f in filters:
 189     filters[f] = (filters[f][0], invert(filters[f][1]))
 190
 191 import ctypes, struct, array
 192
 193 libc = ctypes.CDLL('libc.so.6')
 194 syscall = libc.syscall
 195 class perf_event_attr(ctypes.Structure):
 196     _fields_ = [('type', ctypes.c_uint32),
 197                 ('size', ctypes.c_uint32),
 198                 ('config', ctypes.c_uint64),
 199                 ('sample_freq', ctypes.c_uint64),
 200                 ('sample_type', ctypes.c_uint64),
 201                 ('read_format', ctypes.c_uint64),
 202                 ('flags', ctypes.c_uint64),
 203                 ('wakeup_events', ctypes.c_uint32),
 204                 ('bp_type', ctypes.c_uint32),
 205                 ('bp_addr', ctypes.c_uint64),
 206                 ('bp_len', ctypes.c_uint64),
 207                 ]
 208 def _perf_event_open(attr, pid, cpu, group_fd, flags):
 209     return syscall(298, ctypes.pointer(attr), ctypes.c_int(pid),
 210                    ctypes.c_int(cpu), ctypes.c_int(group_fd),
 211                    ctypes.c_long(flags))
 212
 213 PERF_TYPE_HARDWARE              = 0
 214 PERF_TYPE_SOFTWARE              = 1
 215 PERF_TYPE_TRACEPOINT            = 2
 216 PERF_TYPE_HW_CACHE              = 3
 217 PERF_TYPE_RAW                   = 4
 218 PERF_TYPE_BREAKPOINT            = 5
 219
 220 PERF_SAMPLE_IP                  = 1 << 0
 221 PERF_SAMPLE_TID                 = 1 << 1
 222 PERF_SAMPLE_TIME                = 1 << 2
 223 PERF_SAMPLE_ADDR                = 1 << 3
 224 PERF_SAMPLE_READ                = 1 << 4
 225 PERF_SAMPLE_CALLCHAIN           = 1 << 5
 226 PERF_SAMPLE_ID                  = 1 << 6
 227 PERF_SAMPLE_CPU                 = 1 << 7
 228 PERF_SAMPLE_PERIOD              = 1 << 8
 229 PERF_SAMPLE_STREAM_ID           = 1 << 9
 230 PERF_SAMPLE_RAW                 = 1 << 10
 231
 232 PERF_FORMAT_TOTAL_TIME_ENABLED  = 1 << 0
 233 PERF_FORMAT_TOTAL_TIME_RUNNING  = 1 << 1
 234 PERF_FORMAT_ID                  = 1 << 2
 235 PERF_FORMAT_GROUP               = 1 << 3
 236
 237 import re
 238
 239 sys_tracing = '/sys/kernel/debug/tracing'
 240
 241 class Group(object):
 242     def __init__(self, cpu):
 243         self.events = []
 244         self.group_leader = None
 245         self.cpu = cpu
 246     def add_event(self, name, event_set, tracepoint, filter = None):
 247         self.events.append(Event(group = self,
 248                                  name = name, event_set = event_set,
 249                                  tracepoint = tracepoint, filter = filter))
 250         if len(self.events) == 1:
 251             self.file = os.fdopen(self.events[0].fd)
 252     def read(self):
 253         bytes = 8 * (1 + len(self.events))
 254         fmt = 'xxxxxxxx' + 'q' * len(self.events)
 255         return dict(zip([event.name for event in self.events],
 256                         struct.unpack(fmt, self.file.read(bytes))))
 257
 258 class Event(object):
 259     def __init__(self, group, name, event_set, tracepoint, filter = None):
 260         self.name = name
 261         attr = perf_event_attr()
 262         attr.type = PERF_TYPE_TRACEPOINT
 263         attr.size = ctypes.sizeof(attr)
 264         id_path = os.path.join(sys_tracing, 'events', event_set,
 265                                tracepoint, 'id')
 266         id = int(file(id_path).read())
 267         attr.config = id
 268         attr.sample_type = (PERF_SAMPLE_RAW
 269                             | PERF_SAMPLE_TIME
 270                             | PERF_SAMPLE_CPU)
 271         attr.sample_period = 1
 272         attr.read_format = PERF_FORMAT_GROUP
 273         group_leader = -1
 274         if group.events:
 275             group_leader = group.events[0].fd
 276         fd = _perf_event_open(attr, -1, group.cpu, group_leader, 0)
 277         if fd == -1:
 278             raise Exception('perf_event_open failed')
 279         if filter:
 280             import fcntl
 281             fcntl.ioctl(fd, 0x40082406, filter)
 282         self.fd = fd
 283     def enable(self):
 284         import fcntl
 285         fcntl.ioctl(self.fd, 0x00002400, 0)
 286     def disable(self):
 287         import fcntl
 288         fcntl.ioctl(self.fd, 0x00002401, 0)
 289
 290 class TracepointProvider(object):
 291     def __init__(self):
 292         path = os.path.join(sys_tracing, 'events', 'kvm')
 293         fields = [f
 294                   for f in os.listdir(path)
 295                   if os.path.isdir(os.path.join(path, f))]
 296         extra = []
 297         for f in fields:
 298             if f in filters:
 299                 subfield, values = filters[f]
 300                 for name, number in values.iteritems():
 301                     extra.append(f + '(' + name + ')')
 302         fields += extra
 303         self._setup(fields)
 304         self.select(fields)
 305     def fields(self):
 306         return self._fields
 307     def _setup(self, _fields):
 308         self._fields = _fields
 309         cpure = r'cpu([0-9]+)'
 310         self.cpus = [int(re.match(cpure, x).group(1))
 311                      for x in os.listdir('/sys/devices/system/cpu')
 312                      if re.match(cpure, x)]
 313         import resource
 314         nfiles = len(self.cpus) * 1000
 315         resource.setrlimit(resource.RLIMIT_NOFILE, (nfiles, nfiles))
 316         events = []
 317         self.group_leaders = []
 318         for cpu in self.cpus:
 319             group = Group(cpu)
 320             for name in _fields:
 321                 tracepoint = name
 322                 filter = None
 323                 m = re.match(r'(.*)\((.*)\)', name)
 324                 if m:
 325                     tracepoint, sub = m.groups()
 326                     filter = '%s==%d\0' % (filters[tracepoint][0],
 327                                            filters[tracepoint][1][sub])
 328                 event = group.add_event(name, event_set = 'kvm',
 329                                         tracepoint = tracepoint,
 330                                         filter = filter)
 331             self.group_leaders.append(group)
 332     def select(self, fields):
 333         for group in self.group_leaders:
 334             for event in group.events:
 335                 if event.name in fields:
 336                     event.enable()
 337                 else:
 338                     event.disable()
 339     def read(self):
 340         from collections import defaultdict
 341         ret = defaultdict(int)
 342         for group in self.group_leaders:
 343             for name, val in group.read().iteritems():
 344                 ret[name] += val
 345         return ret
 346
 347 class Stats:
 348     def __init__(self, provider, fields = None):
 349         self.provider = provider
 350         self.fields_filter = fields
 351         self._update()
 352     def _update(self):
 353         def wanted(key):
 354             import re
 355             if not self.fields_filter:
 356                 return True
 357             return re.match(self.fields_filter, key) is not None
 358         self.values = dict([(key, None)
 359                             for key in provider.fields()
 360                             if wanted(key)])
 361         self.provider.select(self.values.keys())
 362     def set_fields_filter(self, fields_filter):
 363         self.fields_filter = fields_filter
 364         self._update()
 365     def get(self):
 366         new = self.provider.read()
 367         for key in self.provider.fields():
 368             oldval = self.values.get(key, (0, 0))
 369             newval = new[key]
 370             newdelta = None
 371             if oldval is not None:
 372                 newdelta = newval - oldval[0]
 373             self.values[key] = (newval, newdelta)
 374         return self.values
 375
 376 if not os.access('/sys/kernel/debug', os.F_OK):
 377     print 'Please enable CONFIG_DEBUG_FS in your kernel'
 378     sys.exit(1)
 379 if not os.access('/sys/kernel/debug/kvm', os.F_OK):
 380     print "Please mount debugfs ('mount -t debugfs debugfs /sys/kernel/debug')"
 381     print "and ensure the kvm modules are loaded"
 382     sys.exit(1)
 383
 384 label_width = 40
 385 number_width = 10
 386
 387 def tui(screen, stats):
 388     curses.use_default_colors()
 389     curses.noecho()
 390     drilldown = False
 391     fields_filter = stats.fields_filter
 392     def update_drilldown():
 393         if not fields_filter:
 394             if drilldown:
 395                 stats.set_fields_filter(None)
 396             else:
 397                 stats.set_fields_filter(r'^[^\(]*$')
 398     update_drilldown()
 399     def refresh(sleeptime):
 400         screen.erase()
 401         screen.addstr(0, 0, 'kvm statistics')
 402         row = 2
 403         s = stats.get()
 404         def sortkey(x):
 405             if s[x][1]:
 406                 return (-s[x][1], -s[x][0])
 407             else:
 408                 return (0, -s[x][0])
 409         for key in sorted(s.keys(), key = sortkey):
 410             if row >= screen.getmaxyx()[0]:
 411                 break
 412             values = s[key]
 413             if not values[0] and not values[1]:
 414                 break
 415             col = 1
 416             screen.addstr(row, col, key)
 417             col += label_width
 418             screen.addstr(row, col, '%10d' % (values[0],))
 419             col += number_width
 420             if values[1] is not None:
 421                 screen.addstr(row, col, '%8d' % (values[1] / sleeptime,))
 422             row += 1
 423         screen.refresh()
 424
 425     sleeptime = 0.25
 426     while True:
 427         refresh(sleeptime)
 428         curses.halfdelay(int(sleeptime * 10))
 429         sleeptime = 3
 430         try:
 431             c = screen.getkey()
 432             if c == 'x':
 433                 drilldown = not drilldown
 434                 update_drilldown()
 435             if c == 'q':
 436                 break
 437         except KeyboardInterrupt:
 438             break
 439         except curses.error:
 440             continue
 441
 442 def batch(stats):
 443     s = stats.get()
 444     time.sleep(1)
 445     s = stats.get()
 446     for key in sorted(s.keys()):
 447         values = s[key]
 448         print '%-22s%10d%10d' % (key, values[0], values[1])
 449
 450 def log(stats):
 451     keys = sorted(stats.get().iterkeys())
 452     def banner():
 453         for k in keys:
 454             print '%10s' % k[0:9],
 455         print
 456     def statline():
 457         s = stats.get()
 458         for k in keys:
 459             print ' %9d' % s[k][1],
 460         print
 461     line = 0
 462     banner_repeat = 20
 463     while True:
 464         time.sleep(1)
 465         if line % banner_repeat == 0:
 466             banner()
 467         statline()
 468         line += 1
 469
 470 options = optparse.OptionParser()
 471 options.add_option('-1', '--once', '--batch',
 472                    action = 'store_true',
 473                    default = False,
 474                    dest = 'once',
 475                    help = 'run in batch mode for one second',
 476                    )
 477 options.add_option('-l', '--log',
 478                    action = 'store_true',
 479                    default = False,
 480                    dest = 'log',
 481                    help = 'run in logging mode (like vmstat)',
 482                    )
 483 options.add_option('-f', '--fields',
 484                    action = 'store',
 485                    default = None,
 486                    dest = 'fields',
 487                    help = 'fields to display (regex)',
 488                    )
 489 (options, args) = options.parse_args(sys.argv)
 490
 491 try:
 492     provider = TracepointProvider()
 493 except:
 494     provider = DebugfsProvider()
 495
 496 stats = Stats(provider, fields = options.fields)
 497
 498 if options.log:
 499     log(stats)
 500 elif not options.once:
 501     import curses.wrapper
 502     curses.wrapper(tui, stats)
 503 else:
 504     batch(stats)