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1 | # | |
2 | # Migration test main engine | |
3 | # | |
4 | # Copyright (c) 2016 Red Hat, Inc. | |
5 | # | |
6 | # This library is free software; you can redistribute it and/or | |
7 | # modify it under the terms of the GNU Lesser General Public | |
8 | # License as published by the Free Software Foundation; either | |
9 | # version 2.1 of the License, or (at your option) any later version. | |
10 | # | |
11 | # This library is distributed in the hope that it will be useful, | |
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | # Lesser General Public License for more details. | |
15 | # | |
16 | # You should have received a copy of the GNU Lesser General Public | |
17 | # License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | # | |
19 | ||
20 | ||
21 | import os | |
22 | import re | |
23 | import sys | |
24 | import time | |
25 | ||
26 | from guestperf.progress import Progress, ProgressStats | |
27 | from guestperf.report import Report | |
28 | from guestperf.timings import TimingRecord, Timings | |
29 | ||
30 | sys.path.append(os.path.join(os.path.dirname(__file__), | |
31 | '..', '..', '..', 'python')) | |
32 | from qemu.machine import QEMUMachine | |
33 | ||
34 | ||
35 | class Engine(object): | |
36 | ||
37 | def __init__(self, binary, dst_host, kernel, initrd, transport="tcp", | |
38 | sleep=15, verbose=False, debug=False): | |
39 | ||
40 | self._binary = binary # Path to QEMU binary | |
41 | self._dst_host = dst_host # Hostname of target host | |
42 | self._kernel = kernel # Path to kernel image | |
43 | self._initrd = initrd # Path to stress initrd | |
44 | self._transport = transport # 'unix' or 'tcp' or 'rdma' | |
45 | self._sleep = sleep | |
46 | self._verbose = verbose | |
47 | self._debug = debug | |
48 | ||
49 | if debug: | |
50 | self._verbose = debug | |
51 | ||
52 | def _vcpu_timing(self, pid, tid_list): | |
53 | records = [] | |
54 | now = time.time() | |
55 | ||
56 | jiffies_per_sec = os.sysconf(os.sysconf_names['SC_CLK_TCK']) | |
57 | for tid in tid_list: | |
58 | statfile = "/proc/%d/task/%d/stat" % (pid, tid) | |
59 | with open(statfile, "r") as fh: | |
60 | stat = fh.readline() | |
61 | fields = stat.split(" ") | |
62 | stime = int(fields[13]) | |
63 | utime = int(fields[14]) | |
64 | records.append(TimingRecord(tid, now, 1000 * (stime + utime) / jiffies_per_sec)) | |
65 | return records | |
66 | ||
67 | def _cpu_timing(self, pid): | |
68 | records = [] | |
69 | now = time.time() | |
70 | ||
71 | jiffies_per_sec = os.sysconf(os.sysconf_names['SC_CLK_TCK']) | |
72 | statfile = "/proc/%d/stat" % pid | |
73 | with open(statfile, "r") as fh: | |
74 | stat = fh.readline() | |
75 | fields = stat.split(" ") | |
76 | stime = int(fields[13]) | |
77 | utime = int(fields[14]) | |
78 | return TimingRecord(pid, now, 1000 * (stime + utime) / jiffies_per_sec) | |
79 | ||
80 | def _migrate_progress(self, vm): | |
81 | info = vm.command("query-migrate") | |
82 | ||
83 | if "ram" not in info: | |
84 | info["ram"] = {} | |
85 | ||
86 | return Progress( | |
87 | info.get("status", "active"), | |
88 | ProgressStats( | |
89 | info["ram"].get("transferred", 0), | |
90 | info["ram"].get("remaining", 0), | |
91 | info["ram"].get("total", 0), | |
92 | info["ram"].get("duplicate", 0), | |
93 | info["ram"].get("skipped", 0), | |
94 | info["ram"].get("normal", 0), | |
95 | info["ram"].get("normal-bytes", 0), | |
96 | info["ram"].get("dirty-pages-rate", 0), | |
97 | info["ram"].get("mbps", 0), | |
98 | info["ram"].get("dirty-sync-count", 0) | |
99 | ), | |
100 | time.time(), | |
101 | info.get("total-time", 0), | |
102 | info.get("downtime", 0), | |
103 | info.get("expected-downtime", 0), | |
104 | info.get("setup-time", 0), | |
105 | info.get("x-cpu-throttle-percentage", 0), | |
106 | ) | |
107 | ||
108 | def _migrate(self, hardware, scenario, src, dst, connect_uri): | |
109 | src_qemu_time = [] | |
110 | src_vcpu_time = [] | |
111 | src_pid = src.get_pid() | |
112 | ||
113 | vcpus = src.command("query-cpus-fast") | |
114 | src_threads = [] | |
115 | for vcpu in vcpus: | |
116 | src_threads.append(vcpu["thread_id"]) | |
117 | ||
118 | # XXX how to get dst timings on remote host ? | |
119 | ||
120 | if self._verbose: | |
121 | print("Sleeping %d seconds for initial guest workload run" % self._sleep) | |
122 | sleep_secs = self._sleep | |
123 | while sleep_secs > 1: | |
124 | src_qemu_time.append(self._cpu_timing(src_pid)) | |
125 | src_vcpu_time.extend(self._vcpu_timing(src_pid, src_threads)) | |
126 | time.sleep(1) | |
127 | sleep_secs -= 1 | |
128 | ||
129 | if self._verbose: | |
130 | print("Starting migration") | |
131 | if scenario._auto_converge: | |
132 | resp = src.command("migrate-set-capabilities", | |
133 | capabilities = [ | |
134 | { "capability": "auto-converge", | |
135 | "state": True } | |
136 | ]) | |
137 | resp = src.command("migrate-set-parameters", | |
138 | x_cpu_throttle_increment=scenario._auto_converge_step) | |
139 | ||
140 | if scenario._post_copy: | |
141 | resp = src.command("migrate-set-capabilities", | |
142 | capabilities = [ | |
143 | { "capability": "postcopy-ram", | |
144 | "state": True } | |
145 | ]) | |
146 | resp = dst.command("migrate-set-capabilities", | |
147 | capabilities = [ | |
148 | { "capability": "postcopy-ram", | |
149 | "state": True } | |
150 | ]) | |
151 | ||
152 | resp = src.command("migrate-set-parameters", | |
153 | max_bandwidth=scenario._bandwidth * 1024 * 1024) | |
154 | ||
155 | resp = src.command("migrate-set-parameters", | |
156 | downtime_limit=scenario._downtime / 1024.0) | |
157 | ||
158 | if scenario._compression_mt: | |
159 | resp = src.command("migrate-set-capabilities", | |
160 | capabilities = [ | |
161 | { "capability": "compress", | |
162 | "state": True } | |
163 | ]) | |
164 | resp = src.command("migrate-set-parameters", | |
165 | compress_threads=scenario._compression_mt_threads) | |
166 | resp = dst.command("migrate-set-capabilities", | |
167 | capabilities = [ | |
168 | { "capability": "compress", | |
169 | "state": True } | |
170 | ]) | |
171 | resp = dst.command("migrate-set-parameters", | |
172 | decompress_threads=scenario._compression_mt_threads) | |
173 | ||
174 | if scenario._compression_xbzrle: | |
175 | resp = src.command("migrate-set-capabilities", | |
176 | capabilities = [ | |
177 | { "capability": "xbzrle", | |
178 | "state": True } | |
179 | ]) | |
180 | resp = dst.command("migrate-set-capabilities", | |
181 | capabilities = [ | |
182 | { "capability": "xbzrle", | |
183 | "state": True } | |
184 | ]) | |
185 | resp = src.command("migrate-set-parameters", | |
186 | xbzrle_cache_size=( | |
187 | hardware._mem * | |
188 | 1024 * 1024 * 1024 / 100 * | |
189 | scenario._compression_xbzrle_cache)) | |
190 | ||
191 | resp = src.command("migrate", uri=connect_uri) | |
192 | ||
193 | post_copy = False | |
194 | paused = False | |
195 | ||
196 | progress_history = [] | |
197 | ||
198 | start = time.time() | |
199 | loop = 0 | |
200 | while True: | |
201 | loop = loop + 1 | |
202 | time.sleep(0.05) | |
203 | ||
204 | progress = self._migrate_progress(src) | |
205 | if (loop % 20) == 0: | |
206 | src_qemu_time.append(self._cpu_timing(src_pid)) | |
207 | src_vcpu_time.extend(self._vcpu_timing(src_pid, src_threads)) | |
208 | ||
209 | if (len(progress_history) == 0 or | |
210 | (progress_history[-1]._ram._iterations < | |
211 | progress._ram._iterations)): | |
212 | progress_history.append(progress) | |
213 | ||
214 | if progress._status in ("completed", "failed", "cancelled"): | |
215 | if progress._status == "completed" and paused: | |
216 | dst.command("cont") | |
217 | if progress_history[-1] != progress: | |
218 | progress_history.append(progress) | |
219 | ||
220 | if progress._status == "completed": | |
221 | if self._verbose: | |
222 | print("Sleeping %d seconds for final guest workload run" % self._sleep) | |
223 | sleep_secs = self._sleep | |
224 | while sleep_secs > 1: | |
225 | time.sleep(1) | |
226 | src_qemu_time.append(self._cpu_timing(src_pid)) | |
227 | src_vcpu_time.extend(self._vcpu_timing(src_pid, src_threads)) | |
228 | sleep_secs -= 1 | |
229 | ||
230 | return [progress_history, src_qemu_time, src_vcpu_time] | |
231 | ||
232 | if self._verbose and (loop % 20) == 0: | |
233 | print("Iter %d: remain %5dMB of %5dMB (total %5dMB @ %5dMb/sec)" % ( | |
234 | progress._ram._iterations, | |
235 | progress._ram._remaining_bytes / (1024 * 1024), | |
236 | progress._ram._total_bytes / (1024 * 1024), | |
237 | progress._ram._transferred_bytes / (1024 * 1024), | |
238 | progress._ram._transfer_rate_mbs, | |
239 | )) | |
240 | ||
241 | if progress._ram._iterations > scenario._max_iters: | |
242 | if self._verbose: | |
243 | print("No completion after %d iterations over RAM" % scenario._max_iters) | |
244 | src.command("migrate_cancel") | |
245 | continue | |
246 | ||
247 | if time.time() > (start + scenario._max_time): | |
248 | if self._verbose: | |
249 | print("No completion after %d seconds" % scenario._max_time) | |
250 | src.command("migrate_cancel") | |
251 | continue | |
252 | ||
253 | if (scenario._post_copy and | |
254 | progress._ram._iterations >= scenario._post_copy_iters and | |
255 | not post_copy): | |
256 | if self._verbose: | |
257 | print("Switching to post-copy after %d iterations" % scenario._post_copy_iters) | |
258 | resp = src.command("migrate-start-postcopy") | |
259 | post_copy = True | |
260 | ||
261 | if (scenario._pause and | |
262 | progress._ram._iterations >= scenario._pause_iters and | |
263 | not paused): | |
264 | if self._verbose: | |
265 | print("Pausing VM after %d iterations" % scenario._pause_iters) | |
266 | resp = src.command("stop") | |
267 | paused = True | |
268 | ||
269 | def _get_common_args(self, hardware, tunnelled=False): | |
270 | args = [ | |
271 | "noapic", | |
272 | "edd=off", | |
273 | "printk.time=1", | |
274 | "noreplace-smp", | |
275 | "cgroup_disable=memory", | |
276 | "pci=noearly", | |
277 | "console=ttyS0", | |
278 | ] | |
279 | if self._debug: | |
280 | args.append("debug") | |
281 | else: | |
282 | args.append("quiet") | |
283 | ||
284 | args.append("ramsize=%s" % hardware._mem) | |
285 | ||
286 | cmdline = " ".join(args) | |
287 | if tunnelled: | |
288 | cmdline = "'" + cmdline + "'" | |
289 | ||
290 | argv = [ | |
291 | "-accel", "kvm", | |
292 | "-cpu", "host", | |
293 | "-kernel", self._kernel, | |
294 | "-initrd", self._initrd, | |
295 | "-append", cmdline, | |
296 | "-chardev", "stdio,id=cdev0", | |
297 | "-device", "isa-serial,chardev=cdev0", | |
298 | "-m", str((hardware._mem * 1024) + 512), | |
299 | "-smp", str(hardware._cpus), | |
300 | ] | |
301 | ||
302 | if self._debug: | |
303 | argv.extend(["-device", "sga"]) | |
304 | ||
305 | if hardware._prealloc_pages: | |
306 | argv_source += ["-mem-path", "/dev/shm", | |
307 | "-mem-prealloc"] | |
308 | if hardware._locked_pages: | |
309 | argv_source += ["-overcommit", "mem-lock=on"] | |
310 | if hardware._huge_pages: | |
311 | pass | |
312 | ||
313 | return argv | |
314 | ||
315 | def _get_src_args(self, hardware): | |
316 | return self._get_common_args(hardware) | |
317 | ||
318 | def _get_dst_args(self, hardware, uri): | |
319 | tunnelled = False | |
320 | if self._dst_host != "localhost": | |
321 | tunnelled = True | |
322 | argv = self._get_common_args(hardware, tunnelled) | |
323 | return argv + ["-incoming", uri] | |
324 | ||
325 | @staticmethod | |
326 | def _get_common_wrapper(cpu_bind, mem_bind): | |
327 | wrapper = [] | |
328 | if len(cpu_bind) > 0 or len(mem_bind) > 0: | |
329 | wrapper.append("numactl") | |
330 | if cpu_bind: | |
331 | wrapper.append("--physcpubind=%s" % ",".join(cpu_bind)) | |
332 | if mem_bind: | |
333 | wrapper.append("--membind=%s" % ",".join(mem_bind)) | |
334 | ||
335 | return wrapper | |
336 | ||
337 | def _get_src_wrapper(self, hardware): | |
338 | return self._get_common_wrapper(hardware._src_cpu_bind, hardware._src_mem_bind) | |
339 | ||
340 | def _get_dst_wrapper(self, hardware): | |
341 | wrapper = self._get_common_wrapper(hardware._dst_cpu_bind, hardware._dst_mem_bind) | |
342 | if self._dst_host != "localhost": | |
343 | return ["ssh", | |
344 | "-R", "9001:localhost:9001", | |
345 | self._dst_host] + wrapper | |
346 | else: | |
347 | return wrapper | |
348 | ||
349 | def _get_timings(self, vm): | |
350 | log = vm.get_log() | |
351 | if not log: | |
352 | return [] | |
353 | if self._debug: | |
354 | print(log) | |
355 | ||
356 | regex = r"[^\s]+\s\((\d+)\):\sINFO:\s(\d+)ms\scopied\s\d+\sGB\sin\s(\d+)ms" | |
357 | matcher = re.compile(regex) | |
358 | records = [] | |
359 | for line in log.split("\n"): | |
360 | match = matcher.match(line) | |
361 | if match: | |
362 | records.append(TimingRecord(int(match.group(1)), | |
363 | int(match.group(2)) / 1000.0, | |
364 | int(match.group(3)))) | |
365 | return records | |
366 | ||
367 | def run(self, hardware, scenario, result_dir=os.getcwd()): | |
368 | abs_result_dir = os.path.join(result_dir, scenario._name) | |
369 | ||
370 | if self._transport == "tcp": | |
371 | uri = "tcp:%s:9000" % self._dst_host | |
372 | elif self._transport == "rdma": | |
373 | uri = "rdma:%s:9000" % self._dst_host | |
374 | elif self._transport == "unix": | |
375 | if self._dst_host != "localhost": | |
376 | raise Exception("Running use unix migration transport for non-local host") | |
377 | uri = "unix:/var/tmp/qemu-migrate-%d.migrate" % os.getpid() | |
378 | try: | |
379 | os.remove(uri[5:]) | |
380 | os.remove(monaddr) | |
381 | except: | |
382 | pass | |
383 | ||
384 | if self._dst_host != "localhost": | |
385 | dstmonaddr = ("localhost", 9001) | |
386 | else: | |
387 | dstmonaddr = "/var/tmp/qemu-dst-%d-monitor.sock" % os.getpid() | |
388 | srcmonaddr = "/var/tmp/qemu-src-%d-monitor.sock" % os.getpid() | |
389 | ||
390 | src = QEMUMachine(self._binary, | |
391 | args=self._get_src_args(hardware), | |
392 | wrapper=self._get_src_wrapper(hardware), | |
393 | name="qemu-src-%d" % os.getpid(), | |
394 | monitor_address=srcmonaddr) | |
395 | ||
396 | dst = QEMUMachine(self._binary, | |
397 | args=self._get_dst_args(hardware, uri), | |
398 | wrapper=self._get_dst_wrapper(hardware), | |
399 | name="qemu-dst-%d" % os.getpid(), | |
400 | monitor_address=dstmonaddr) | |
401 | ||
402 | try: | |
403 | src.launch() | |
404 | dst.launch() | |
405 | ||
406 | ret = self._migrate(hardware, scenario, src, dst, uri) | |
407 | progress_history = ret[0] | |
408 | qemu_timings = ret[1] | |
409 | vcpu_timings = ret[2] | |
410 | if uri[0:5] == "unix:": | |
411 | os.remove(uri[5:]) | |
412 | if self._verbose: | |
413 | print("Finished migration") | |
414 | ||
415 | src.shutdown() | |
416 | dst.shutdown() | |
417 | ||
418 | return Report(hardware, scenario, progress_history, | |
419 | Timings(self._get_timings(src) + self._get_timings(dst)), | |
420 | Timings(qemu_timings), | |
421 | Timings(vcpu_timings), | |
422 | self._binary, self._dst_host, self._kernel, | |
423 | self._initrd, self._transport, self._sleep) | |
424 | except Exception as e: | |
425 | if self._debug: | |
426 | print("Failed: %s" % str(e)) | |
427 | try: | |
428 | src.shutdown() | |
429 | except: | |
430 | pass | |
431 | try: | |
432 | dst.shutdown() | |
433 | except: | |
434 | pass | |
435 | ||
436 | if self._debug: | |
437 | print(src.get_log()) | |
438 | print(dst.get_log()) | |
439 | raise | |
440 |