| 1 | /* |
| 2 | * Throttle infrastructure tests |
| 3 | * |
| 4 | * Copyright Nodalink, EURL. 2013-2014 |
| 5 | * Copyright Igalia, S.L. 2015 |
| 6 | * |
| 7 | * Authors: |
| 8 | * Benoît Canet <benoit.canet@nodalink.com> |
| 9 | * Alberto Garcia <berto@igalia.com> |
| 10 | * |
| 11 | * This work is licensed under the terms of the GNU LGPL, version 2 or later. |
| 12 | * See the COPYING.LIB file in the top-level directory. |
| 13 | */ |
| 14 | |
| 15 | #include "qemu/osdep.h" |
| 16 | #include <math.h> |
| 17 | #include "qemu/aio.h" |
| 18 | #include "qapi/error.h" |
| 19 | #include "qemu/throttle.h" |
| 20 | #include "qemu/error-report.h" |
| 21 | #include "qemu/main-loop.h" |
| 22 | #include "qemu/module.h" |
| 23 | #include "block/throttle-groups.h" |
| 24 | #include "system/block-backend.h" |
| 25 | |
| 26 | static AioContext *ctx; |
| 27 | static LeakyBucket bkt; |
| 28 | static ThrottleConfig cfg; |
| 29 | static ThrottleGroupMember tgm; |
| 30 | static ThrottleState ts; |
| 31 | static ThrottleTimers *tt; |
| 32 | |
| 33 | /* useful function */ |
| 34 | static bool double_cmp(double x, double y) |
| 35 | { |
| 36 | return fabsl(x - y) < 1e-6; |
| 37 | } |
| 38 | |
| 39 | /* tests for single bucket operations */ |
| 40 | static void test_leak_bucket(void) |
| 41 | { |
| 42 | throttle_config_init(&cfg); |
| 43 | bkt = cfg.buckets[THROTTLE_BPS_TOTAL]; |
| 44 | |
| 45 | /* set initial value */ |
| 46 | bkt.avg = 150; |
| 47 | bkt.max = 15; |
| 48 | bkt.level = 1.5; |
| 49 | |
| 50 | /* leak an op work of time */ |
| 51 | throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 150); |
| 52 | g_assert(bkt.avg == 150); |
| 53 | g_assert(bkt.max == 15); |
| 54 | g_assert(double_cmp(bkt.level, 0.5)); |
| 55 | |
| 56 | /* leak again emptying the bucket */ |
| 57 | throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 150); |
| 58 | g_assert(bkt.avg == 150); |
| 59 | g_assert(bkt.max == 15); |
| 60 | g_assert(double_cmp(bkt.level, 0)); |
| 61 | |
| 62 | /* check that the bucket level won't go lower */ |
| 63 | throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 150); |
| 64 | g_assert(bkt.avg == 150); |
| 65 | g_assert(bkt.max == 15); |
| 66 | g_assert(double_cmp(bkt.level, 0)); |
| 67 | |
| 68 | /* check that burst_level leaks correctly */ |
| 69 | bkt.burst_level = 6; |
| 70 | bkt.max = 250; |
| 71 | bkt.burst_length = 2; /* otherwise burst_level will not leak */ |
| 72 | throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 100); |
| 73 | g_assert(double_cmp(bkt.burst_level, 3.5)); |
| 74 | |
| 75 | throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 100); |
| 76 | g_assert(double_cmp(bkt.burst_level, 1)); |
| 77 | |
| 78 | throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 100); |
| 79 | g_assert(double_cmp(bkt.burst_level, 0)); |
| 80 | |
| 81 | throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 100); |
| 82 | g_assert(double_cmp(bkt.burst_level, 0)); |
| 83 | } |
| 84 | |
| 85 | static void test_compute_wait(void) |
| 86 | { |
| 87 | unsigned i; |
| 88 | int64_t wait; |
| 89 | int64_t result; |
| 90 | |
| 91 | throttle_config_init(&cfg); |
| 92 | bkt = cfg.buckets[THROTTLE_BPS_TOTAL]; |
| 93 | |
| 94 | /* no operation limit set */ |
| 95 | bkt.avg = 0; |
| 96 | bkt.max = 15; |
| 97 | bkt.level = 1.5; |
| 98 | wait = throttle_compute_wait(&bkt); |
| 99 | g_assert(!wait); |
| 100 | |
| 101 | /* zero delta */ |
| 102 | bkt.avg = 150; |
| 103 | bkt.max = 15; |
| 104 | bkt.level = 15; |
| 105 | wait = throttle_compute_wait(&bkt); |
| 106 | g_assert(!wait); |
| 107 | |
| 108 | /* below zero delta */ |
| 109 | bkt.avg = 150; |
| 110 | bkt.max = 15; |
| 111 | bkt.level = 9; |
| 112 | wait = throttle_compute_wait(&bkt); |
| 113 | g_assert(!wait); |
| 114 | |
| 115 | /* half an operation above max */ |
| 116 | bkt.avg = 150; |
| 117 | bkt.max = 15; |
| 118 | bkt.level = 15.5; |
| 119 | wait = throttle_compute_wait(&bkt); |
| 120 | /* time required to do half an operation */ |
| 121 | result = (int64_t) NANOSECONDS_PER_SECOND / 150 / 2; |
| 122 | g_assert(wait == result); |
| 123 | |
| 124 | /* Perform I/O for 2.2 seconds at a rate of bkt.max */ |
| 125 | bkt.burst_length = 2; |
| 126 | bkt.level = 0; |
| 127 | bkt.avg = 10; |
| 128 | bkt.max = 200; |
| 129 | for (i = 0; i < 22; i++) { |
| 130 | double units = bkt.max / 10.0; |
| 131 | bkt.level += units; |
| 132 | bkt.burst_level += units; |
| 133 | throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 10); |
| 134 | wait = throttle_compute_wait(&bkt); |
| 135 | g_assert(double_cmp(bkt.burst_level, 0)); |
| 136 | g_assert(double_cmp(bkt.level, (i + 1) * (bkt.max - bkt.avg) / 10.0)); |
| 137 | /* We can do bursts for the 2 seconds we have configured in |
| 138 | * burst_length. We have 100 extra milliseconds of burst |
| 139 | * because bkt.level has been leaking during this time. |
| 140 | * After that, we have to wait. */ |
| 141 | result = i < 21 ? 0 : 1.8 * NANOSECONDS_PER_SECOND; |
| 142 | g_assert(wait == result); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | /* functions to test ThrottleState initialization/destroy methods */ |
| 147 | static void read_timer_cb(void *opaque) |
| 148 | { |
| 149 | } |
| 150 | |
| 151 | static void write_timer_cb(void *opaque) |
| 152 | { |
| 153 | } |
| 154 | |
| 155 | static void test_init(void) |
| 156 | { |
| 157 | int i; |
| 158 | |
| 159 | tt = &tgm.throttle_timers; |
| 160 | |
| 161 | /* fill the structures with crap */ |
| 162 | memset(&ts, 1, sizeof(ts)); |
| 163 | memset(tt, 1, sizeof(*tt)); |
| 164 | |
| 165 | /* init structures */ |
| 166 | throttle_init(&ts); |
| 167 | throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, |
| 168 | read_timer_cb, write_timer_cb, &ts); |
| 169 | |
| 170 | /* check initialized fields */ |
| 171 | g_assert(tt->clock_type == QEMU_CLOCK_VIRTUAL); |
| 172 | g_assert(tt->timers[THROTTLE_READ]); |
| 173 | g_assert(tt->timers[THROTTLE_WRITE]); |
| 174 | |
| 175 | /* check other fields where cleared */ |
| 176 | g_assert(!ts.previous_leak); |
| 177 | g_assert(!ts.cfg.op_size); |
| 178 | for (i = 0; i < BUCKETS_COUNT; i++) { |
| 179 | g_assert(!ts.cfg.buckets[i].avg); |
| 180 | g_assert(!ts.cfg.buckets[i].max); |
| 181 | g_assert(!ts.cfg.buckets[i].level); |
| 182 | } |
| 183 | |
| 184 | throttle_timers_destroy(tt); |
| 185 | } |
| 186 | |
| 187 | static void test_init_readonly(void) |
| 188 | { |
| 189 | int i; |
| 190 | |
| 191 | tt = &tgm.throttle_timers; |
| 192 | |
| 193 | /* fill the structures with crap */ |
| 194 | memset(&ts, 1, sizeof(ts)); |
| 195 | memset(tt, 1, sizeof(*tt)); |
| 196 | |
| 197 | /* init structures */ |
| 198 | throttle_init(&ts); |
| 199 | throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, |
| 200 | read_timer_cb, NULL, &ts); |
| 201 | |
| 202 | /* check initialized fields */ |
| 203 | g_assert(tt->clock_type == QEMU_CLOCK_VIRTUAL); |
| 204 | g_assert(tt->timers[THROTTLE_READ]); |
| 205 | g_assert(!tt->timers[THROTTLE_WRITE]); |
| 206 | |
| 207 | /* check other fields where cleared */ |
| 208 | g_assert(!ts.previous_leak); |
| 209 | g_assert(!ts.cfg.op_size); |
| 210 | for (i = 0; i < BUCKETS_COUNT; i++) { |
| 211 | g_assert(!ts.cfg.buckets[i].avg); |
| 212 | g_assert(!ts.cfg.buckets[i].max); |
| 213 | g_assert(!ts.cfg.buckets[i].level); |
| 214 | } |
| 215 | |
| 216 | throttle_timers_destroy(tt); |
| 217 | } |
| 218 | |
| 219 | static void test_init_writeonly(void) |
| 220 | { |
| 221 | int i; |
| 222 | |
| 223 | tt = &tgm.throttle_timers; |
| 224 | |
| 225 | /* fill the structures with crap */ |
| 226 | memset(&ts, 1, sizeof(ts)); |
| 227 | memset(tt, 1, sizeof(*tt)); |
| 228 | |
| 229 | /* init structures */ |
| 230 | throttle_init(&ts); |
| 231 | throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, |
| 232 | NULL, write_timer_cb, &ts); |
| 233 | |
| 234 | /* check initialized fields */ |
| 235 | g_assert(tt->clock_type == QEMU_CLOCK_VIRTUAL); |
| 236 | g_assert(!tt->timers[THROTTLE_READ]); |
| 237 | g_assert(tt->timers[THROTTLE_WRITE]); |
| 238 | |
| 239 | /* check other fields where cleared */ |
| 240 | g_assert(!ts.previous_leak); |
| 241 | g_assert(!ts.cfg.op_size); |
| 242 | for (i = 0; i < BUCKETS_COUNT; i++) { |
| 243 | g_assert(!ts.cfg.buckets[i].avg); |
| 244 | g_assert(!ts.cfg.buckets[i].max); |
| 245 | g_assert(!ts.cfg.buckets[i].level); |
| 246 | } |
| 247 | |
| 248 | throttle_timers_destroy(tt); |
| 249 | } |
| 250 | |
| 251 | static void test_destroy(void) |
| 252 | { |
| 253 | int i; |
| 254 | throttle_init(&ts); |
| 255 | throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, |
| 256 | read_timer_cb, write_timer_cb, &ts); |
| 257 | throttle_timers_destroy(tt); |
| 258 | for (i = 0; i < THROTTLE_MAX; i++) { |
| 259 | g_assert(!tt->timers[i]); |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | /* function to test throttle_config and throttle_get_config */ |
| 264 | static void test_config_functions(void) |
| 265 | { |
| 266 | int i; |
| 267 | ThrottleConfig orig_cfg, final_cfg; |
| 268 | |
| 269 | orig_cfg.buckets[THROTTLE_BPS_TOTAL].avg = 153; |
| 270 | orig_cfg.buckets[THROTTLE_BPS_READ].avg = 56; |
| 271 | orig_cfg.buckets[THROTTLE_BPS_WRITE].avg = 1; |
| 272 | |
| 273 | orig_cfg.buckets[THROTTLE_OPS_TOTAL].avg = 150; |
| 274 | orig_cfg.buckets[THROTTLE_OPS_READ].avg = 69; |
| 275 | orig_cfg.buckets[THROTTLE_OPS_WRITE].avg = 23; |
| 276 | |
| 277 | orig_cfg.buckets[THROTTLE_BPS_TOTAL].max = 0; |
| 278 | orig_cfg.buckets[THROTTLE_BPS_READ].max = 56; |
| 279 | orig_cfg.buckets[THROTTLE_BPS_WRITE].max = 120; |
| 280 | |
| 281 | orig_cfg.buckets[THROTTLE_OPS_TOTAL].max = 150; |
| 282 | orig_cfg.buckets[THROTTLE_OPS_READ].max = 400; |
| 283 | orig_cfg.buckets[THROTTLE_OPS_WRITE].max = 500; |
| 284 | |
| 285 | orig_cfg.buckets[THROTTLE_BPS_TOTAL].level = 45; |
| 286 | orig_cfg.buckets[THROTTLE_BPS_READ].level = 65; |
| 287 | orig_cfg.buckets[THROTTLE_BPS_WRITE].level = 23; |
| 288 | |
| 289 | orig_cfg.buckets[THROTTLE_OPS_TOTAL].level = 1; |
| 290 | orig_cfg.buckets[THROTTLE_OPS_READ].level = 90; |
| 291 | orig_cfg.buckets[THROTTLE_OPS_WRITE].level = 75; |
| 292 | |
| 293 | orig_cfg.op_size = 1; |
| 294 | |
| 295 | throttle_init(&ts); |
| 296 | throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, |
| 297 | read_timer_cb, write_timer_cb, &ts); |
| 298 | /* structure reset by throttle_init previous_leak should be null */ |
| 299 | g_assert(!ts.previous_leak); |
| 300 | throttle_config(&ts, QEMU_CLOCK_VIRTUAL, &orig_cfg); |
| 301 | |
| 302 | /* has previous leak been initialized by throttle_config ? */ |
| 303 | g_assert(ts.previous_leak); |
| 304 | |
| 305 | /* get back the fixed configuration */ |
| 306 | throttle_get_config(&ts, &final_cfg); |
| 307 | |
| 308 | throttle_timers_destroy(tt); |
| 309 | |
| 310 | g_assert(final_cfg.buckets[THROTTLE_BPS_TOTAL].avg == 153); |
| 311 | g_assert(final_cfg.buckets[THROTTLE_BPS_READ].avg == 56); |
| 312 | g_assert(final_cfg.buckets[THROTTLE_BPS_WRITE].avg == 1); |
| 313 | |
| 314 | g_assert(final_cfg.buckets[THROTTLE_OPS_TOTAL].avg == 150); |
| 315 | g_assert(final_cfg.buckets[THROTTLE_OPS_READ].avg == 69); |
| 316 | g_assert(final_cfg.buckets[THROTTLE_OPS_WRITE].avg == 23); |
| 317 | |
| 318 | g_assert(final_cfg.buckets[THROTTLE_BPS_TOTAL].max == 0); |
| 319 | g_assert(final_cfg.buckets[THROTTLE_BPS_READ].max == 56); |
| 320 | g_assert(final_cfg.buckets[THROTTLE_BPS_WRITE].max == 120); |
| 321 | |
| 322 | g_assert(final_cfg.buckets[THROTTLE_OPS_TOTAL].max == 150); |
| 323 | g_assert(final_cfg.buckets[THROTTLE_OPS_READ].max == 400); |
| 324 | g_assert(final_cfg.buckets[THROTTLE_OPS_WRITE].max == 500); |
| 325 | |
| 326 | g_assert(final_cfg.op_size == 1); |
| 327 | |
| 328 | /* check bucket have been cleared */ |
| 329 | for (i = 0; i < BUCKETS_COUNT; i++) { |
| 330 | g_assert(!final_cfg.buckets[i].level); |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | /* functions to test is throttle is enabled by a config */ |
| 335 | static void set_cfg_value(bool is_max, int index, int value) |
| 336 | { |
| 337 | if (is_max) { |
| 338 | cfg.buckets[index].max = value; |
| 339 | /* If max is set, avg should never be 0 */ |
| 340 | cfg.buckets[index].avg = MAX(cfg.buckets[index].avg, 1); |
| 341 | } else { |
| 342 | cfg.buckets[index].avg = value; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | static void test_enabled(void) |
| 347 | { |
| 348 | int i; |
| 349 | |
| 350 | throttle_config_init(&cfg); |
| 351 | g_assert(!throttle_enabled(&cfg)); |
| 352 | |
| 353 | for (i = 0; i < BUCKETS_COUNT; i++) { |
| 354 | throttle_config_init(&cfg); |
| 355 | set_cfg_value(false, i, 150); |
| 356 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 357 | g_assert(throttle_enabled(&cfg)); |
| 358 | } |
| 359 | |
| 360 | for (i = 0; i < BUCKETS_COUNT; i++) { |
| 361 | throttle_config_init(&cfg); |
| 362 | set_cfg_value(false, i, -150); |
| 363 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | /* tests functions for throttle_conflicting */ |
| 368 | |
| 369 | static void test_conflicts_for_one_set(bool is_max, |
| 370 | int total, |
| 371 | int read, |
| 372 | int write) |
| 373 | { |
| 374 | throttle_config_init(&cfg); |
| 375 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 376 | |
| 377 | set_cfg_value(is_max, total, 1); |
| 378 | set_cfg_value(is_max, read, 1); |
| 379 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 380 | |
| 381 | throttle_config_init(&cfg); |
| 382 | set_cfg_value(is_max, total, 1); |
| 383 | set_cfg_value(is_max, write, 1); |
| 384 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 385 | |
| 386 | throttle_config_init(&cfg); |
| 387 | set_cfg_value(is_max, total, 1); |
| 388 | set_cfg_value(is_max, read, 1); |
| 389 | set_cfg_value(is_max, write, 1); |
| 390 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 391 | |
| 392 | throttle_config_init(&cfg); |
| 393 | set_cfg_value(is_max, total, 1); |
| 394 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 395 | |
| 396 | throttle_config_init(&cfg); |
| 397 | set_cfg_value(is_max, read, 1); |
| 398 | set_cfg_value(is_max, write, 1); |
| 399 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 400 | } |
| 401 | |
| 402 | static void test_conflicting_config(void) |
| 403 | { |
| 404 | /* bps average conflicts */ |
| 405 | test_conflicts_for_one_set(false, |
| 406 | THROTTLE_BPS_TOTAL, |
| 407 | THROTTLE_BPS_READ, |
| 408 | THROTTLE_BPS_WRITE); |
| 409 | |
| 410 | /* ops average conflicts */ |
| 411 | test_conflicts_for_one_set(false, |
| 412 | THROTTLE_OPS_TOTAL, |
| 413 | THROTTLE_OPS_READ, |
| 414 | THROTTLE_OPS_WRITE); |
| 415 | |
| 416 | /* bps average conflicts */ |
| 417 | test_conflicts_for_one_set(true, |
| 418 | THROTTLE_BPS_TOTAL, |
| 419 | THROTTLE_BPS_READ, |
| 420 | THROTTLE_BPS_WRITE); |
| 421 | /* ops average conflicts */ |
| 422 | test_conflicts_for_one_set(true, |
| 423 | THROTTLE_OPS_TOTAL, |
| 424 | THROTTLE_OPS_READ, |
| 425 | THROTTLE_OPS_WRITE); |
| 426 | } |
| 427 | /* functions to test the throttle_is_valid function */ |
| 428 | static void test_is_valid_for_value(int value, bool should_be_valid) |
| 429 | { |
| 430 | int is_max, index; |
| 431 | for (is_max = 0; is_max < 2; is_max++) { |
| 432 | for (index = 0; index < BUCKETS_COUNT; index++) { |
| 433 | throttle_config_init(&cfg); |
| 434 | set_cfg_value(is_max, index, value); |
| 435 | g_assert(throttle_is_valid(&cfg, NULL) == should_be_valid); |
| 436 | } |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | static void test_is_valid(void) |
| 441 | { |
| 442 | /* negative numbesr are invalid */ |
| 443 | test_is_valid_for_value(-1, false); |
| 444 | /* zero is valid */ |
| 445 | test_is_valid_for_value(0, true); |
| 446 | /* positives numbers are valid */ |
| 447 | test_is_valid_for_value(1, true); |
| 448 | } |
| 449 | |
| 450 | static void test_ranges(void) |
| 451 | { |
| 452 | int i; |
| 453 | |
| 454 | for (i = 0; i < BUCKETS_COUNT; i++) { |
| 455 | LeakyBucket *b = &cfg.buckets[i]; |
| 456 | throttle_config_init(&cfg); |
| 457 | |
| 458 | /* avg = 0 means throttling is disabled, but the config is valid */ |
| 459 | b->avg = 0; |
| 460 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 461 | g_assert(!throttle_enabled(&cfg)); |
| 462 | |
| 463 | /* These are valid configurations (values <= THROTTLE_VALUE_MAX) */ |
| 464 | b->avg = 1; |
| 465 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 466 | |
| 467 | b->avg = THROTTLE_VALUE_MAX; |
| 468 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 469 | |
| 470 | b->avg = THROTTLE_VALUE_MAX; |
| 471 | b->max = THROTTLE_VALUE_MAX; |
| 472 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 473 | |
| 474 | /* Values over THROTTLE_VALUE_MAX are not allowed */ |
| 475 | b->avg = THROTTLE_VALUE_MAX + 1; |
| 476 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 477 | |
| 478 | b->avg = THROTTLE_VALUE_MAX; |
| 479 | b->max = THROTTLE_VALUE_MAX + 1; |
| 480 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 481 | |
| 482 | /* burst_length must be between 1 and THROTTLE_VALUE_MAX */ |
| 483 | b->avg = 1; |
| 484 | b->max = 1; |
| 485 | b->burst_length = 0; |
| 486 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 487 | |
| 488 | b->avg = 1; |
| 489 | b->max = 1; |
| 490 | b->burst_length = 1; |
| 491 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 492 | |
| 493 | b->avg = 1; |
| 494 | b->max = 1; |
| 495 | b->burst_length = THROTTLE_VALUE_MAX; |
| 496 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 497 | |
| 498 | b->avg = 1; |
| 499 | b->max = 1; |
| 500 | b->burst_length = THROTTLE_VALUE_MAX + 1; |
| 501 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 502 | |
| 503 | /* burst_length * max cannot exceed THROTTLE_VALUE_MAX */ |
| 504 | b->avg = 1; |
| 505 | b->max = 2; |
| 506 | b->burst_length = THROTTLE_VALUE_MAX / 2; |
| 507 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 508 | |
| 509 | b->avg = 1; |
| 510 | b->max = 3; |
| 511 | b->burst_length = THROTTLE_VALUE_MAX / 2; |
| 512 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 513 | |
| 514 | b->avg = 1; |
| 515 | b->max = THROTTLE_VALUE_MAX; |
| 516 | b->burst_length = 1; |
| 517 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 518 | |
| 519 | b->avg = 1; |
| 520 | b->max = THROTTLE_VALUE_MAX; |
| 521 | b->burst_length = 2; |
| 522 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | static void test_max_is_missing_limit(void) |
| 527 | { |
| 528 | int i; |
| 529 | |
| 530 | for (i = 0; i < BUCKETS_COUNT; i++) { |
| 531 | throttle_config_init(&cfg); |
| 532 | cfg.buckets[i].max = 100; |
| 533 | cfg.buckets[i].avg = 0; |
| 534 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 535 | |
| 536 | cfg.buckets[i].max = 0; |
| 537 | cfg.buckets[i].avg = 0; |
| 538 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 539 | |
| 540 | cfg.buckets[i].max = 0; |
| 541 | cfg.buckets[i].avg = 100; |
| 542 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 543 | |
| 544 | cfg.buckets[i].max = 30; |
| 545 | cfg.buckets[i].avg = 100; |
| 546 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 547 | |
| 548 | cfg.buckets[i].max = 100; |
| 549 | cfg.buckets[i].avg = 100; |
| 550 | g_assert(throttle_is_valid(&cfg, NULL)); |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | static void test_iops_size_is_missing_limit(void) |
| 555 | { |
| 556 | /* A total/read/write iops limit is required */ |
| 557 | throttle_config_init(&cfg); |
| 558 | cfg.op_size = 4096; |
| 559 | g_assert(!throttle_is_valid(&cfg, NULL)); |
| 560 | } |
| 561 | |
| 562 | static void test_have_timer(void) |
| 563 | { |
| 564 | /* zero structures */ |
| 565 | memset(&ts, 0, sizeof(ts)); |
| 566 | memset(tt, 0, sizeof(*tt)); |
| 567 | |
| 568 | /* no timer set should return false */ |
| 569 | g_assert(!throttle_timers_are_initialized(tt)); |
| 570 | |
| 571 | /* init structures */ |
| 572 | throttle_init(&ts); |
| 573 | throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, |
| 574 | read_timer_cb, write_timer_cb, &ts); |
| 575 | |
| 576 | /* timer set by init should return true */ |
| 577 | g_assert(throttle_timers_are_initialized(tt)); |
| 578 | |
| 579 | throttle_timers_destroy(tt); |
| 580 | } |
| 581 | |
| 582 | static void test_detach_attach(void) |
| 583 | { |
| 584 | /* zero structures */ |
| 585 | memset(&ts, 0, sizeof(ts)); |
| 586 | memset(tt, 0, sizeof(*tt)); |
| 587 | |
| 588 | /* init the structure */ |
| 589 | throttle_init(&ts); |
| 590 | throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, |
| 591 | read_timer_cb, write_timer_cb, &ts); |
| 592 | |
| 593 | /* timer set by init should return true */ |
| 594 | g_assert(throttle_timers_are_initialized(tt)); |
| 595 | |
| 596 | /* timer should no longer exist after detaching */ |
| 597 | throttle_timers_detach_aio_context(tt); |
| 598 | g_assert(!throttle_timers_are_initialized(tt)); |
| 599 | |
| 600 | /* timer should exist again after attaching */ |
| 601 | throttle_timers_attach_aio_context(tt, ctx); |
| 602 | g_assert(throttle_timers_are_initialized(tt)); |
| 603 | |
| 604 | throttle_timers_destroy(tt); |
| 605 | } |
| 606 | |
| 607 | static bool do_test_accounting(bool is_ops, /* are we testing bps or ops */ |
| 608 | int size, /* size of the operation to do */ |
| 609 | double avg, /* io limit */ |
| 610 | uint64_t op_size, /* ideal size of an io */ |
| 611 | double total_result, |
| 612 | double read_result, |
| 613 | double write_result) |
| 614 | { |
| 615 | BucketType to_test[2][3] = { { THROTTLE_BPS_TOTAL, |
| 616 | THROTTLE_BPS_READ, |
| 617 | THROTTLE_BPS_WRITE, }, |
| 618 | { THROTTLE_OPS_TOTAL, |
| 619 | THROTTLE_OPS_READ, |
| 620 | THROTTLE_OPS_WRITE, } }; |
| 621 | BucketType index; |
| 622 | int i; |
| 623 | |
| 624 | throttle_config_init(&cfg); |
| 625 | |
| 626 | for (i = 0; i < 3; i++) { |
| 627 | index = to_test[is_ops][i]; |
| 628 | cfg.buckets[index].avg = avg; |
| 629 | } |
| 630 | |
| 631 | cfg.op_size = op_size; |
| 632 | |
| 633 | throttle_init(&ts); |
| 634 | throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, |
| 635 | read_timer_cb, write_timer_cb, &ts); |
| 636 | throttle_config(&ts, QEMU_CLOCK_VIRTUAL, &cfg); |
| 637 | |
| 638 | /* account a read */ |
| 639 | throttle_account(&ts, THROTTLE_READ, size); |
| 640 | /* account a write */ |
| 641 | throttle_account(&ts, THROTTLE_WRITE, size); |
| 642 | |
| 643 | /* check total result */ |
| 644 | index = to_test[is_ops][0]; |
| 645 | if (!double_cmp(ts.cfg.buckets[index].level, total_result)) { |
| 646 | return false; |
| 647 | } |
| 648 | |
| 649 | /* check read result */ |
| 650 | index = to_test[is_ops][1]; |
| 651 | if (!double_cmp(ts.cfg.buckets[index].level, read_result)) { |
| 652 | return false; |
| 653 | } |
| 654 | |
| 655 | /* check write result */ |
| 656 | index = to_test[is_ops][2]; |
| 657 | if (!double_cmp(ts.cfg.buckets[index].level, write_result)) { |
| 658 | return false; |
| 659 | } |
| 660 | |
| 661 | throttle_timers_destroy(tt); |
| 662 | |
| 663 | return true; |
| 664 | } |
| 665 | |
| 666 | static void test_accounting(void) |
| 667 | { |
| 668 | /* tests for bps */ |
| 669 | |
| 670 | /* op of size 1 */ |
| 671 | g_assert(do_test_accounting(false, |
| 672 | 1 * 512, |
| 673 | 150, |
| 674 | 0, |
| 675 | 1024, |
| 676 | 512, |
| 677 | 512)); |
| 678 | |
| 679 | /* op of size 2 */ |
| 680 | g_assert(do_test_accounting(false, |
| 681 | 2 * 512, |
| 682 | 150, |
| 683 | 0, |
| 684 | 2048, |
| 685 | 1024, |
| 686 | 1024)); |
| 687 | |
| 688 | /* op of size 2 and orthogonal parameter change */ |
| 689 | g_assert(do_test_accounting(false, |
| 690 | 2 * 512, |
| 691 | 150, |
| 692 | 17, |
| 693 | 2048, |
| 694 | 1024, |
| 695 | 1024)); |
| 696 | |
| 697 | |
| 698 | /* tests for ops */ |
| 699 | |
| 700 | /* op of size 1 */ |
| 701 | g_assert(do_test_accounting(true, |
| 702 | 1 * 512, |
| 703 | 150, |
| 704 | 0, |
| 705 | 2, |
| 706 | 1, |
| 707 | 1)); |
| 708 | |
| 709 | /* op of size 2 */ |
| 710 | g_assert(do_test_accounting(true, |
| 711 | 2 * 512, |
| 712 | 150, |
| 713 | 0, |
| 714 | 2, |
| 715 | 1, |
| 716 | 1)); |
| 717 | |
| 718 | /* jumbo op accounting fragmentation : size 64 with op size of 13 units */ |
| 719 | g_assert(do_test_accounting(true, |
| 720 | 64 * 512, |
| 721 | 150, |
| 722 | 13 * 512, |
| 723 | (64.0 * 2) / 13, |
| 724 | (64.0 / 13), |
| 725 | (64.0 / 13))); |
| 726 | |
| 727 | /* same with orthogonal parameters changes */ |
| 728 | g_assert(do_test_accounting(true, |
| 729 | 64 * 512, |
| 730 | 300, |
| 731 | 13 * 512, |
| 732 | (64.0 * 2) / 13, |
| 733 | (64.0 / 13), |
| 734 | (64.0 / 13))); |
| 735 | } |
| 736 | |
| 737 | static void test_groups(void) |
| 738 | { |
| 739 | ThrottleConfig cfg1, cfg2; |
| 740 | BlockBackend *blk1, *blk2, *blk3; |
| 741 | BlockBackendPublic *blkp1, *blkp2, *blkp3; |
| 742 | ThrottleGroupMember *tgm1, *tgm2, *tgm3; |
| 743 | |
| 744 | /* No actual I/O is performed on these devices */ |
| 745 | blk1 = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); |
| 746 | blk2 = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); |
| 747 | blk3 = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); |
| 748 | |
| 749 | blkp1 = blk_get_public(blk1); |
| 750 | blkp2 = blk_get_public(blk2); |
| 751 | blkp3 = blk_get_public(blk3); |
| 752 | |
| 753 | tgm1 = &blkp1->throttle_group_member; |
| 754 | tgm2 = &blkp2->throttle_group_member; |
| 755 | tgm3 = &blkp3->throttle_group_member; |
| 756 | |
| 757 | g_assert(tgm1->throttle_state == NULL); |
| 758 | g_assert(tgm2->throttle_state == NULL); |
| 759 | g_assert(tgm3->throttle_state == NULL); |
| 760 | |
| 761 | throttle_group_register_tgm(tgm1, "bar", blk_get_aio_context(blk1)); |
| 762 | throttle_group_register_tgm(tgm2, "foo", blk_get_aio_context(blk2)); |
| 763 | throttle_group_register_tgm(tgm3, "bar", blk_get_aio_context(blk3)); |
| 764 | |
| 765 | g_assert(tgm1->throttle_state != NULL); |
| 766 | g_assert(tgm2->throttle_state != NULL); |
| 767 | g_assert(tgm3->throttle_state != NULL); |
| 768 | |
| 769 | g_assert(!strcmp(throttle_group_get_name(tgm1), "bar")); |
| 770 | g_assert(!strcmp(throttle_group_get_name(tgm2), "foo")); |
| 771 | g_assert(tgm1->throttle_state == tgm3->throttle_state); |
| 772 | |
| 773 | /* Setting the config of a group member affects the whole group */ |
| 774 | throttle_config_init(&cfg1); |
| 775 | cfg1.buckets[THROTTLE_BPS_READ].avg = 500000; |
| 776 | cfg1.buckets[THROTTLE_BPS_WRITE].avg = 285000; |
| 777 | cfg1.buckets[THROTTLE_OPS_READ].avg = 20000; |
| 778 | cfg1.buckets[THROTTLE_OPS_WRITE].avg = 12000; |
| 779 | throttle_group_config(tgm1, &cfg1); |
| 780 | |
| 781 | throttle_group_get_config(tgm1, &cfg1); |
| 782 | throttle_group_get_config(tgm3, &cfg2); |
| 783 | g_assert(!memcmp(&cfg1, &cfg2, sizeof(cfg1))); |
| 784 | |
| 785 | cfg2.buckets[THROTTLE_BPS_READ].avg = 4547; |
| 786 | cfg2.buckets[THROTTLE_BPS_WRITE].avg = 1349; |
| 787 | cfg2.buckets[THROTTLE_OPS_READ].avg = 123; |
| 788 | cfg2.buckets[THROTTLE_OPS_WRITE].avg = 86; |
| 789 | throttle_group_config(tgm3, &cfg1); |
| 790 | |
| 791 | throttle_group_get_config(tgm1, &cfg1); |
| 792 | throttle_group_get_config(tgm3, &cfg2); |
| 793 | g_assert(!memcmp(&cfg1, &cfg2, sizeof(cfg1))); |
| 794 | |
| 795 | throttle_group_unregister_tgm(tgm1); |
| 796 | throttle_group_unregister_tgm(tgm2); |
| 797 | throttle_group_unregister_tgm(tgm3); |
| 798 | |
| 799 | g_assert(tgm1->throttle_state == NULL); |
| 800 | g_assert(tgm2->throttle_state == NULL); |
| 801 | g_assert(tgm3->throttle_state == NULL); |
| 802 | } |
| 803 | |
| 804 | int main(int argc, char **argv) |
| 805 | { |
| 806 | qemu_init_main_loop(&error_fatal); |
| 807 | ctx = qemu_get_aio_context(); |
| 808 | bdrv_init(); |
| 809 | module_call_init(MODULE_INIT_QOM); |
| 810 | |
| 811 | do {} while (g_main_context_iteration(NULL, false)); |
| 812 | |
| 813 | /* tests in the same order as the header function declarations */ |
| 814 | g_test_init(&argc, &argv, NULL); |
| 815 | g_test_add_func("/throttle/leak_bucket", test_leak_bucket); |
| 816 | g_test_add_func("/throttle/compute_wait", test_compute_wait); |
| 817 | g_test_add_func("/throttle/init", test_init); |
| 818 | g_test_add_func("/throttle/init_readonly", test_init_readonly); |
| 819 | g_test_add_func("/throttle/init_writeonly", test_init_writeonly); |
| 820 | g_test_add_func("/throttle/destroy", test_destroy); |
| 821 | g_test_add_func("/throttle/have_timer", test_have_timer); |
| 822 | g_test_add_func("/throttle/detach_attach", test_detach_attach); |
| 823 | g_test_add_func("/throttle/config/enabled", test_enabled); |
| 824 | g_test_add_func("/throttle/config/conflicting", test_conflicting_config); |
| 825 | g_test_add_func("/throttle/config/is_valid", test_is_valid); |
| 826 | g_test_add_func("/throttle/config/ranges", test_ranges); |
| 827 | g_test_add_func("/throttle/config/max", test_max_is_missing_limit); |
| 828 | g_test_add_func("/throttle/config/iops_size", |
| 829 | test_iops_size_is_missing_limit); |
| 830 | g_test_add_func("/throttle/config_functions", test_config_functions); |
| 831 | g_test_add_func("/throttle/accounting", test_accounting); |
| 832 | g_test_add_func("/throttle/groups", test_groups); |
| 833 | return g_test_run(); |
| 834 | } |
| 835 |