kvm_stat: Only consider online cpus
[qemu/ar7.git] / scripts / kvm / kvm_stat
blob2a788bc34c834f535fd0fd7ac7526d19ed37f6eb
1 #!/usr/bin/python
3 # top-like utility for displaying kvm statistics
5 # Copyright 2006-2008 Qumranet Technologies
6 # Copyright 2008-2011 Red Hat, Inc.
8 # Authors:
9 # Avi Kivity <avi@redhat.com>
11 # This work is licensed under the terms of the GNU GPL, version 2. See
12 # the COPYING file in the top-level directory.
14 import curses
15 import sys, os, time, optparse
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])
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',
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',
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',
167 vendor_exit_reasons = {
168 'vmx': vmx_exit_reasons,
169 'svm': svm_exit_reasons,
170 'IBM/S390': s390_exit_reasons,
173 syscall_numbers = {
174 'IBM/S390': 331,
177 sc_perf_evt_open = 298
179 exit_reasons = None
181 for line in file('/proc/cpuinfo').readlines():
182 if line.startswith('flags') or line.startswith('vendor_id'):
183 for flag in line.split():
184 if flag in vendor_exit_reasons:
185 exit_reasons = vendor_exit_reasons[flag]
186 if flag in syscall_numbers:
187 sc_perf_evt_open = syscall_numbers[flag]
188 filters = {
189 'kvm_exit': ('exit_reason', exit_reasons)
192 def invert(d):
193 return dict((x[1], x[0]) for x in d.iteritems())
195 for f in filters:
196 filters[f] = (filters[f][0], invert(filters[f][1]))
198 import ctypes, struct, array
200 libc = ctypes.CDLL('libc.so.6')
201 syscall = libc.syscall
202 class perf_event_attr(ctypes.Structure):
203 _fields_ = [('type', ctypes.c_uint32),
204 ('size', ctypes.c_uint32),
205 ('config', ctypes.c_uint64),
206 ('sample_freq', ctypes.c_uint64),
207 ('sample_type', ctypes.c_uint64),
208 ('read_format', ctypes.c_uint64),
209 ('flags', ctypes.c_uint64),
210 ('wakeup_events', ctypes.c_uint32),
211 ('bp_type', ctypes.c_uint32),
212 ('bp_addr', ctypes.c_uint64),
213 ('bp_len', ctypes.c_uint64),
215 def _perf_event_open(attr, pid, cpu, group_fd, flags):
216 return syscall(sc_perf_evt_open, ctypes.pointer(attr), ctypes.c_int(pid),
217 ctypes.c_int(cpu), ctypes.c_int(group_fd),
218 ctypes.c_long(flags))
220 PERF_TYPE_HARDWARE = 0
221 PERF_TYPE_SOFTWARE = 1
222 PERF_TYPE_TRACEPOINT = 2
223 PERF_TYPE_HW_CACHE = 3
224 PERF_TYPE_RAW = 4
225 PERF_TYPE_BREAKPOINT = 5
227 PERF_SAMPLE_IP = 1 << 0
228 PERF_SAMPLE_TID = 1 << 1
229 PERF_SAMPLE_TIME = 1 << 2
230 PERF_SAMPLE_ADDR = 1 << 3
231 PERF_SAMPLE_READ = 1 << 4
232 PERF_SAMPLE_CALLCHAIN = 1 << 5
233 PERF_SAMPLE_ID = 1 << 6
234 PERF_SAMPLE_CPU = 1 << 7
235 PERF_SAMPLE_PERIOD = 1 << 8
236 PERF_SAMPLE_STREAM_ID = 1 << 9
237 PERF_SAMPLE_RAW = 1 << 10
239 PERF_FORMAT_TOTAL_TIME_ENABLED = 1 << 0
240 PERF_FORMAT_TOTAL_TIME_RUNNING = 1 << 1
241 PERF_FORMAT_ID = 1 << 2
242 PERF_FORMAT_GROUP = 1 << 3
244 import re
246 sys_tracing = '/sys/kernel/debug/tracing'
248 class Group(object):
249 def __init__(self, cpu):
250 self.events = []
251 self.group_leader = None
252 self.cpu = cpu
253 def add_event(self, name, event_set, tracepoint, filter = None):
254 self.events.append(Event(group = self,
255 name = name, event_set = event_set,
256 tracepoint = tracepoint, filter = filter))
257 if len(self.events) == 1:
258 self.file = os.fdopen(self.events[0].fd)
259 def read(self):
260 bytes = 8 * (1 + len(self.events))
261 fmt = 'xxxxxxxx' + 'q' * len(self.events)
262 return dict(zip([event.name for event in self.events],
263 struct.unpack(fmt, self.file.read(bytes))))
265 class Event(object):
266 def __init__(self, group, name, event_set, tracepoint, filter = None):
267 self.name = name
268 attr = perf_event_attr()
269 attr.type = PERF_TYPE_TRACEPOINT
270 attr.size = ctypes.sizeof(attr)
271 id_path = os.path.join(sys_tracing, 'events', event_set,
272 tracepoint, 'id')
273 id = int(file(id_path).read())
274 attr.config = id
275 attr.sample_type = (PERF_SAMPLE_RAW
276 | PERF_SAMPLE_TIME
277 | PERF_SAMPLE_CPU)
278 attr.sample_period = 1
279 attr.read_format = PERF_FORMAT_GROUP
280 group_leader = -1
281 if group.events:
282 group_leader = group.events[0].fd
283 fd = _perf_event_open(attr, -1, group.cpu, group_leader, 0)
284 if fd == -1:
285 raise Exception('perf_event_open failed')
286 if filter:
287 import fcntl
288 fcntl.ioctl(fd, 0x40082406, filter)
289 self.fd = fd
290 def enable(self):
291 import fcntl
292 fcntl.ioctl(self.fd, 0x00002400, 0)
293 def disable(self):
294 import fcntl
295 fcntl.ioctl(self.fd, 0x00002401, 0)
297 class TracepointProvider(object):
298 def __init__(self):
299 path = os.path.join(sys_tracing, 'events', 'kvm')
300 fields = [f
301 for f in os.listdir(path)
302 if os.path.isdir(os.path.join(path, f))]
303 extra = []
304 for f in fields:
305 if f in filters:
306 subfield, values = filters[f]
307 for name, number in values.iteritems():
308 extra.append(f + '(' + name + ')')
309 fields += extra
310 self._setup(fields)
311 self.select(fields)
312 def fields(self):
313 return self._fields
315 def _online_cpus(self):
316 l = []
317 pattern = r'cpu([0-9]+)'
318 basedir = '/sys/devices/system/cpu'
319 for entry in os.listdir(basedir):
320 match = re.match(pattern, entry)
321 if not match:
322 continue
323 path = os.path.join(basedir, entry, 'online')
324 if os.path.exists(path) and open(path).read().strip() != '1':
325 continue
326 l.append(int(match.group(1)))
327 return l
329 def _setup(self, _fields):
330 self._fields = _fields
331 cpus = self._online_cpus()
332 import resource
333 nfiles = len(cpus) * 1000
334 resource.setrlimit(resource.RLIMIT_NOFILE, (nfiles, nfiles))
335 events = []
336 self.group_leaders = []
337 for cpu in cpus:
338 group = Group(cpu)
339 for name in _fields:
340 tracepoint = name
341 filter = None
342 m = re.match(r'(.*)\((.*)\)', name)
343 if m:
344 tracepoint, sub = m.groups()
345 filter = '%s==%d\0' % (filters[tracepoint][0],
346 filters[tracepoint][1][sub])
347 event = group.add_event(name, event_set = 'kvm',
348 tracepoint = tracepoint,
349 filter = filter)
350 self.group_leaders.append(group)
351 def select(self, fields):
352 for group in self.group_leaders:
353 for event in group.events:
354 if event.name in fields:
355 event.enable()
356 else:
357 event.disable()
358 def read(self):
359 from collections import defaultdict
360 ret = defaultdict(int)
361 for group in self.group_leaders:
362 for name, val in group.read().iteritems():
363 ret[name] += val
364 return ret
366 class Stats:
367 def __init__(self, providers, fields = None):
368 self.providers = providers
369 self.fields_filter = fields
370 self._update()
371 def _update(self):
372 def wanted(key):
373 import re
374 if not self.fields_filter:
375 return True
376 return re.match(self.fields_filter, key) is not None
377 self.values = dict()
378 for d in providers:
379 provider_fields = [key for key in d.fields() if wanted(key)]
380 for key in provider_fields:
381 self.values[key] = None
382 d.select(provider_fields)
383 def set_fields_filter(self, fields_filter):
384 self.fields_filter = fields_filter
385 self._update()
386 def get(self):
387 for d in providers:
388 new = d.read()
389 for key in d.fields():
390 oldval = self.values.get(key, (0, 0))
391 newval = new[key]
392 newdelta = None
393 if oldval is not None:
394 newdelta = newval - oldval[0]
395 self.values[key] = (newval, newdelta)
396 return self.values
398 if not os.access('/sys/kernel/debug', os.F_OK):
399 print 'Please enable CONFIG_DEBUG_FS in your kernel'
400 sys.exit(1)
401 if not os.access('/sys/kernel/debug/kvm', os.F_OK):
402 print "Please mount debugfs ('mount -t debugfs debugfs /sys/kernel/debug')"
403 print "and ensure the kvm modules are loaded"
404 sys.exit(1)
406 label_width = 40
407 number_width = 10
409 def tui(screen, stats):
410 curses.use_default_colors()
411 curses.noecho()
412 drilldown = False
413 fields_filter = stats.fields_filter
414 def update_drilldown():
415 if not fields_filter:
416 if drilldown:
417 stats.set_fields_filter(None)
418 else:
419 stats.set_fields_filter(r'^[^\(]*$')
420 update_drilldown()
421 def refresh(sleeptime):
422 screen.erase()
423 screen.addstr(0, 0, 'kvm statistics')
424 row = 2
425 s = stats.get()
426 def sortkey(x):
427 if s[x][1]:
428 return (-s[x][1], -s[x][0])
429 else:
430 return (0, -s[x][0])
431 for key in sorted(s.keys(), key = sortkey):
432 if row >= screen.getmaxyx()[0]:
433 break
434 values = s[key]
435 if not values[0] and not values[1]:
436 break
437 col = 1
438 screen.addstr(row, col, key)
439 col += label_width
440 screen.addstr(row, col, '%10d' % (values[0],))
441 col += number_width
442 if values[1] is not None:
443 screen.addstr(row, col, '%8d' % (values[1] / sleeptime,))
444 row += 1
445 screen.refresh()
447 sleeptime = 0.25
448 while True:
449 refresh(sleeptime)
450 curses.halfdelay(int(sleeptime * 10))
451 sleeptime = 3
452 try:
453 c = screen.getkey()
454 if c == 'x':
455 drilldown = not drilldown
456 update_drilldown()
457 if c == 'q':
458 break
459 except KeyboardInterrupt:
460 break
461 except curses.error:
462 continue
464 def batch(stats):
465 s = stats.get()
466 time.sleep(1)
467 s = stats.get()
468 for key in sorted(s.keys()):
469 values = s[key]
470 print '%-22s%10d%10d' % (key, values[0], values[1])
472 def log(stats):
473 keys = sorted(stats.get().iterkeys())
474 def banner():
475 for k in keys:
476 print '%10s' % k[0:9],
477 print
478 def statline():
479 s = stats.get()
480 for k in keys:
481 print ' %9d' % s[k][1],
482 print
483 line = 0
484 banner_repeat = 20
485 while True:
486 time.sleep(1)
487 if line % banner_repeat == 0:
488 banner()
489 statline()
490 line += 1
492 options = optparse.OptionParser()
493 options.add_option('-1', '--once', '--batch',
494 action = 'store_true',
495 default = False,
496 dest = 'once',
497 help = 'run in batch mode for one second',
499 options.add_option('-l', '--log',
500 action = 'store_true',
501 default = False,
502 dest = 'log',
503 help = 'run in logging mode (like vmstat)',
505 options.add_option('-t', '--tracepoints',
506 action = 'store_true',
507 default = False,
508 dest = 'tracepoints',
509 help = 'retrieve statistics from tracepoints',
511 options.add_option('-d', '--debugfs',
512 action = 'store_true',
513 default = False,
514 dest = 'debugfs',
515 help = 'retrieve statistics from debugfs',
517 options.add_option('-f', '--fields',
518 action = 'store',
519 default = None,
520 dest = 'fields',
521 help = 'fields to display (regex)',
523 (options, args) = options.parse_args(sys.argv)
525 providers = []
526 if options.tracepoints:
527 providers.append(TracepointProvider())
528 if options.debugfs:
529 providers.append(DebugfsProvider())
531 if len(providers) == 0:
532 try:
533 providers = [TracepointProvider()]
534 except:
535 providers = [DebugfsProvider()]
537 stats = Stats(providers, fields = options.fields)
539 if options.log:
540 log(stats)
541 elif not options.once:
542 import curses.wrapper
543 curses.wrapper(tui, stats)
544 else:
545 batch(stats)