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 "block/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 "sysemu/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; 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)); 137 /* We can do bursts for the 2 seconds we have configured in 138 * burst_length. We have 100 extra miliseconds 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[0]); 173 g_assert(tt->timers[1]); 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_destroy(void) 188 { 189 int i; 190 throttle_init(&ts); 191 throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, 192 read_timer_cb, write_timer_cb, &ts); 193 throttle_timers_destroy(tt); 194 for (i = 0; i < 2; i++) { 195 g_assert(!tt->timers[i]); 196 } 197 } 198 199 /* function to test throttle_config and throttle_get_config */ 200 static void test_config_functions(void) 201 { 202 int i; 203 ThrottleConfig orig_cfg, final_cfg; 204 205 orig_cfg.buckets[THROTTLE_BPS_TOTAL].avg = 153; 206 orig_cfg.buckets[THROTTLE_BPS_READ].avg = 56; 207 orig_cfg.buckets[THROTTLE_BPS_WRITE].avg = 1; 208 209 orig_cfg.buckets[THROTTLE_OPS_TOTAL].avg = 150; 210 orig_cfg.buckets[THROTTLE_OPS_READ].avg = 69; 211 orig_cfg.buckets[THROTTLE_OPS_WRITE].avg = 23; 212 213 orig_cfg.buckets[THROTTLE_BPS_TOTAL].max = 0; 214 orig_cfg.buckets[THROTTLE_BPS_READ].max = 56; 215 orig_cfg.buckets[THROTTLE_BPS_WRITE].max = 120; 216 217 orig_cfg.buckets[THROTTLE_OPS_TOTAL].max = 150; 218 orig_cfg.buckets[THROTTLE_OPS_READ].max = 400; 219 orig_cfg.buckets[THROTTLE_OPS_WRITE].max = 500; 220 221 orig_cfg.buckets[THROTTLE_BPS_TOTAL].level = 45; 222 orig_cfg.buckets[THROTTLE_BPS_READ].level = 65; 223 orig_cfg.buckets[THROTTLE_BPS_WRITE].level = 23; 224 225 orig_cfg.buckets[THROTTLE_OPS_TOTAL].level = 1; 226 orig_cfg.buckets[THROTTLE_OPS_READ].level = 90; 227 orig_cfg.buckets[THROTTLE_OPS_WRITE].level = 75; 228 229 orig_cfg.op_size = 1; 230 231 throttle_init(&ts); 232 throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, 233 read_timer_cb, write_timer_cb, &ts); 234 /* structure reset by throttle_init previous_leak should be null */ 235 g_assert(!ts.previous_leak); 236 throttle_config(&ts, QEMU_CLOCK_VIRTUAL, &orig_cfg); 237 238 /* has previous leak been initialized by throttle_config ? */ 239 g_assert(ts.previous_leak); 240 241 /* get back the fixed configuration */ 242 throttle_get_config(&ts, &final_cfg); 243 244 throttle_timers_destroy(tt); 245 246 g_assert(final_cfg.buckets[THROTTLE_BPS_TOTAL].avg == 153); 247 g_assert(final_cfg.buckets[THROTTLE_BPS_READ].avg == 56); 248 g_assert(final_cfg.buckets[THROTTLE_BPS_WRITE].avg == 1); 249 250 g_assert(final_cfg.buckets[THROTTLE_OPS_TOTAL].avg == 150); 251 g_assert(final_cfg.buckets[THROTTLE_OPS_READ].avg == 69); 252 g_assert(final_cfg.buckets[THROTTLE_OPS_WRITE].avg == 23); 253 254 g_assert(final_cfg.buckets[THROTTLE_BPS_TOTAL].max == 0); 255 g_assert(final_cfg.buckets[THROTTLE_BPS_READ].max == 56); 256 g_assert(final_cfg.buckets[THROTTLE_BPS_WRITE].max == 120); 257 258 g_assert(final_cfg.buckets[THROTTLE_OPS_TOTAL].max == 150); 259 g_assert(final_cfg.buckets[THROTTLE_OPS_READ].max == 400); 260 g_assert(final_cfg.buckets[THROTTLE_OPS_WRITE].max == 500); 261 262 g_assert(final_cfg.op_size == 1); 263 264 /* check bucket have been cleared */ 265 for (i = 0; i < BUCKETS_COUNT; i++) { 266 g_assert(!final_cfg.buckets[i].level); 267 } 268 } 269 270 /* functions to test is throttle is enabled by a config */ 271 static void set_cfg_value(bool is_max, int index, int value) 272 { 273 if (is_max) { 274 cfg.buckets[index].max = value; 275 /* If max is set, avg should never be 0 */ 276 cfg.buckets[index].avg = MAX(cfg.buckets[index].avg, 1); 277 } else { 278 cfg.buckets[index].avg = value; 279 } 280 } 281 282 static void test_enabled(void) 283 { 284 int i; 285 286 throttle_config_init(&cfg); 287 g_assert(!throttle_enabled(&cfg)); 288 289 for (i = 0; i < BUCKETS_COUNT; i++) { 290 throttle_config_init(&cfg); 291 set_cfg_value(false, i, 150); 292 g_assert(throttle_is_valid(&cfg, NULL)); 293 g_assert(throttle_enabled(&cfg)); 294 } 295 296 for (i = 0; i < BUCKETS_COUNT; i++) { 297 throttle_config_init(&cfg); 298 set_cfg_value(false, i, -150); 299 g_assert(!throttle_is_valid(&cfg, NULL)); 300 } 301 } 302 303 /* tests functions for throttle_conflicting */ 304 305 static void test_conflicts_for_one_set(bool is_max, 306 int total, 307 int read, 308 int write) 309 { 310 throttle_config_init(&cfg); 311 g_assert(throttle_is_valid(&cfg, NULL)); 312 313 set_cfg_value(is_max, total, 1); 314 set_cfg_value(is_max, read, 1); 315 g_assert(!throttle_is_valid(&cfg, NULL)); 316 317 throttle_config_init(&cfg); 318 set_cfg_value(is_max, total, 1); 319 set_cfg_value(is_max, write, 1); 320 g_assert(!throttle_is_valid(&cfg, NULL)); 321 322 throttle_config_init(&cfg); 323 set_cfg_value(is_max, total, 1); 324 set_cfg_value(is_max, read, 1); 325 set_cfg_value(is_max, write, 1); 326 g_assert(!throttle_is_valid(&cfg, NULL)); 327 328 throttle_config_init(&cfg); 329 set_cfg_value(is_max, total, 1); 330 g_assert(throttle_is_valid(&cfg, NULL)); 331 332 throttle_config_init(&cfg); 333 set_cfg_value(is_max, read, 1); 334 set_cfg_value(is_max, write, 1); 335 g_assert(throttle_is_valid(&cfg, NULL)); 336 } 337 338 static void test_conflicting_config(void) 339 { 340 /* bps average conflicts */ 341 test_conflicts_for_one_set(false, 342 THROTTLE_BPS_TOTAL, 343 THROTTLE_BPS_READ, 344 THROTTLE_BPS_WRITE); 345 346 /* ops average conflicts */ 347 test_conflicts_for_one_set(false, 348 THROTTLE_OPS_TOTAL, 349 THROTTLE_OPS_READ, 350 THROTTLE_OPS_WRITE); 351 352 /* bps average conflicts */ 353 test_conflicts_for_one_set(true, 354 THROTTLE_BPS_TOTAL, 355 THROTTLE_BPS_READ, 356 THROTTLE_BPS_WRITE); 357 /* ops average conflicts */ 358 test_conflicts_for_one_set(true, 359 THROTTLE_OPS_TOTAL, 360 THROTTLE_OPS_READ, 361 THROTTLE_OPS_WRITE); 362 } 363 /* functions to test the throttle_is_valid function */ 364 static void test_is_valid_for_value(int value, bool should_be_valid) 365 { 366 int is_max, index; 367 for (is_max = 0; is_max < 2; is_max++) { 368 for (index = 0; index < BUCKETS_COUNT; index++) { 369 throttle_config_init(&cfg); 370 set_cfg_value(is_max, index, value); 371 g_assert(throttle_is_valid(&cfg, NULL) == should_be_valid); 372 } 373 } 374 } 375 376 static void test_is_valid(void) 377 { 378 /* negative number are invalid */ 379 test_is_valid_for_value(-1, false); 380 /* zero are valids */ 381 test_is_valid_for_value(0, true); 382 /* positives numers are valids */ 383 test_is_valid_for_value(1, true); 384 } 385 386 static void test_ranges(void) 387 { 388 int i; 389 390 for (i = 0; i < BUCKETS_COUNT; i++) { 391 LeakyBucket *b = &cfg.buckets[i]; 392 throttle_config_init(&cfg); 393 394 /* avg = 0 means throttling is disabled, but the config is valid */ 395 b->avg = 0; 396 g_assert(throttle_is_valid(&cfg, NULL)); 397 g_assert(!throttle_enabled(&cfg)); 398 399 /* These are valid configurations (values <= THROTTLE_VALUE_MAX) */ 400 b->avg = 1; 401 g_assert(throttle_is_valid(&cfg, NULL)); 402 403 b->avg = THROTTLE_VALUE_MAX; 404 g_assert(throttle_is_valid(&cfg, NULL)); 405 406 b->avg = THROTTLE_VALUE_MAX; 407 b->max = THROTTLE_VALUE_MAX; 408 g_assert(throttle_is_valid(&cfg, NULL)); 409 410 /* Values over THROTTLE_VALUE_MAX are not allowed */ 411 b->avg = THROTTLE_VALUE_MAX + 1; 412 g_assert(!throttle_is_valid(&cfg, NULL)); 413 414 b->avg = THROTTLE_VALUE_MAX; 415 b->max = THROTTLE_VALUE_MAX + 1; 416 g_assert(!throttle_is_valid(&cfg, NULL)); 417 418 /* burst_length must be between 1 and THROTTLE_VALUE_MAX */ 419 b->avg = 1; 420 b->max = 1; 421 b->burst_length = 0; 422 g_assert(!throttle_is_valid(&cfg, NULL)); 423 424 b->avg = 1; 425 b->max = 1; 426 b->burst_length = 1; 427 g_assert(throttle_is_valid(&cfg, NULL)); 428 429 b->avg = 1; 430 b->max = 1; 431 b->burst_length = THROTTLE_VALUE_MAX; 432 g_assert(throttle_is_valid(&cfg, NULL)); 433 434 b->avg = 1; 435 b->max = 1; 436 b->burst_length = THROTTLE_VALUE_MAX + 1; 437 g_assert(!throttle_is_valid(&cfg, NULL)); 438 439 /* burst_length * max cannot exceed THROTTLE_VALUE_MAX */ 440 b->avg = 1; 441 b->max = 2; 442 b->burst_length = THROTTLE_VALUE_MAX / 2; 443 g_assert(throttle_is_valid(&cfg, NULL)); 444 445 b->avg = 1; 446 b->max = 3; 447 b->burst_length = THROTTLE_VALUE_MAX / 2; 448 g_assert(!throttle_is_valid(&cfg, NULL)); 449 450 b->avg = 1; 451 b->max = THROTTLE_VALUE_MAX; 452 b->burst_length = 1; 453 g_assert(throttle_is_valid(&cfg, NULL)); 454 455 b->avg = 1; 456 b->max = THROTTLE_VALUE_MAX; 457 b->burst_length = 2; 458 g_assert(!throttle_is_valid(&cfg, NULL)); 459 } 460 } 461 462 static void test_max_is_missing_limit(void) 463 { 464 int i; 465 466 for (i = 0; i < BUCKETS_COUNT; i++) { 467 throttle_config_init(&cfg); 468 cfg.buckets[i].max = 100; 469 cfg.buckets[i].avg = 0; 470 g_assert(!throttle_is_valid(&cfg, NULL)); 471 472 cfg.buckets[i].max = 0; 473 cfg.buckets[i].avg = 0; 474 g_assert(throttle_is_valid(&cfg, NULL)); 475 476 cfg.buckets[i].max = 0; 477 cfg.buckets[i].avg = 100; 478 g_assert(throttle_is_valid(&cfg, NULL)); 479 480 cfg.buckets[i].max = 30; 481 cfg.buckets[i].avg = 100; 482 g_assert(!throttle_is_valid(&cfg, NULL)); 483 484 cfg.buckets[i].max = 100; 485 cfg.buckets[i].avg = 100; 486 g_assert(throttle_is_valid(&cfg, NULL)); 487 } 488 } 489 490 static void test_iops_size_is_missing_limit(void) 491 { 492 /* A total/read/write iops limit is required */ 493 throttle_config_init(&cfg); 494 cfg.op_size = 4096; 495 g_assert(!throttle_is_valid(&cfg, NULL)); 496 } 497 498 static void test_have_timer(void) 499 { 500 /* zero structures */ 501 memset(&ts, 0, sizeof(ts)); 502 memset(tt, 0, sizeof(*tt)); 503 504 /* no timer set should return false */ 505 g_assert(!throttle_timers_are_initialized(tt)); 506 507 /* init structures */ 508 throttle_init(&ts); 509 throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, 510 read_timer_cb, write_timer_cb, &ts); 511 512 /* timer set by init should return true */ 513 g_assert(throttle_timers_are_initialized(tt)); 514 515 throttle_timers_destroy(tt); 516 } 517 518 static void test_detach_attach(void) 519 { 520 /* zero structures */ 521 memset(&ts, 0, sizeof(ts)); 522 memset(tt, 0, sizeof(*tt)); 523 524 /* init the structure */ 525 throttle_init(&ts); 526 throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, 527 read_timer_cb, write_timer_cb, &ts); 528 529 /* timer set by init should return true */ 530 g_assert(throttle_timers_are_initialized(tt)); 531 532 /* timer should no longer exist after detaching */ 533 throttle_timers_detach_aio_context(tt); 534 g_assert(!throttle_timers_are_initialized(tt)); 535 536 /* timer should exist again after attaching */ 537 throttle_timers_attach_aio_context(tt, ctx); 538 g_assert(throttle_timers_are_initialized(tt)); 539 540 throttle_timers_destroy(tt); 541 } 542 543 static bool do_test_accounting(bool is_ops, /* are we testing bps or ops */ 544 int size, /* size of the operation to do */ 545 double avg, /* io limit */ 546 uint64_t op_size, /* ideal size of an io */ 547 double total_result, 548 double read_result, 549 double write_result) 550 { 551 BucketType to_test[2][3] = { { THROTTLE_BPS_TOTAL, 552 THROTTLE_BPS_READ, 553 THROTTLE_BPS_WRITE, }, 554 { THROTTLE_OPS_TOTAL, 555 THROTTLE_OPS_READ, 556 THROTTLE_OPS_WRITE, } }; 557 ThrottleConfig cfg; 558 BucketType index; 559 int i; 560 561 throttle_config_init(&cfg); 562 563 for (i = 0; i < 3; i++) { 564 BucketType index = to_test[is_ops][i]; 565 cfg.buckets[index].avg = avg; 566 } 567 568 cfg.op_size = op_size; 569 570 throttle_init(&ts); 571 throttle_timers_init(tt, ctx, QEMU_CLOCK_VIRTUAL, 572 read_timer_cb, write_timer_cb, &ts); 573 throttle_config(&ts, QEMU_CLOCK_VIRTUAL, &cfg); 574 575 /* account a read */ 576 throttle_account(&ts, false, size); 577 /* account a write */ 578 throttle_account(&ts, true, size); 579 580 /* check total result */ 581 index = to_test[is_ops][0]; 582 if (!double_cmp(ts.cfg.buckets[index].level, total_result)) { 583 return false; 584 } 585 586 /* check read result */ 587 index = to_test[is_ops][1]; 588 if (!double_cmp(ts.cfg.buckets[index].level, read_result)) { 589 return false; 590 } 591 592 /* check write result */ 593 index = to_test[is_ops][2]; 594 if (!double_cmp(ts.cfg.buckets[index].level, write_result)) { 595 return false; 596 } 597 598 throttle_timers_destroy(tt); 599 600 return true; 601 } 602 603 static void test_accounting(void) 604 { 605 /* tests for bps */ 606 607 /* op of size 1 */ 608 g_assert(do_test_accounting(false, 609 1 * 512, 610 150, 611 0, 612 1024, 613 512, 614 512)); 615 616 /* op of size 2 */ 617 g_assert(do_test_accounting(false, 618 2 * 512, 619 150, 620 0, 621 2048, 622 1024, 623 1024)); 624 625 /* op of size 2 and orthogonal parameter change */ 626 g_assert(do_test_accounting(false, 627 2 * 512, 628 150, 629 17, 630 2048, 631 1024, 632 1024)); 633 634 635 /* tests for ops */ 636 637 /* op of size 1 */ 638 g_assert(do_test_accounting(true, 639 1 * 512, 640 150, 641 0, 642 2, 643 1, 644 1)); 645 646 /* op of size 2 */ 647 g_assert(do_test_accounting(true, 648 2 * 512, 649 150, 650 0, 651 2, 652 1, 653 1)); 654 655 /* jumbo op accounting fragmentation : size 64 with op size of 13 units */ 656 g_assert(do_test_accounting(true, 657 64 * 512, 658 150, 659 13 * 512, 660 (64.0 * 2) / 13, 661 (64.0 / 13), 662 (64.0 / 13))); 663 664 /* same with orthogonal parameters changes */ 665 g_assert(do_test_accounting(true, 666 64 * 512, 667 300, 668 13 * 512, 669 (64.0 * 2) / 13, 670 (64.0 / 13), 671 (64.0 / 13))); 672 } 673 674 static void test_groups(void) 675 { 676 ThrottleConfig cfg1, cfg2; 677 BlockBackend *blk1, *blk2, *blk3; 678 BlockBackendPublic *blkp1, *blkp2, *blkp3; 679 ThrottleGroupMember *tgm1, *tgm2, *tgm3; 680 681 /* No actual I/O is performed on these devices */ 682 blk1 = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); 683 blk2 = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); 684 blk3 = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); 685 686 blkp1 = blk_get_public(blk1); 687 blkp2 = blk_get_public(blk2); 688 blkp3 = blk_get_public(blk3); 689 690 tgm1 = &blkp1->throttle_group_member; 691 tgm2 = &blkp2->throttle_group_member; 692 tgm3 = &blkp3->throttle_group_member; 693 694 g_assert(tgm1->throttle_state == NULL); 695 g_assert(tgm2->throttle_state == NULL); 696 g_assert(tgm3->throttle_state == NULL); 697 698 throttle_group_register_tgm(tgm1, "bar", blk_get_aio_context(blk1)); 699 throttle_group_register_tgm(tgm2, "foo", blk_get_aio_context(blk2)); 700 throttle_group_register_tgm(tgm3, "bar", blk_get_aio_context(blk3)); 701 702 g_assert(tgm1->throttle_state != NULL); 703 g_assert(tgm2->throttle_state != NULL); 704 g_assert(tgm3->throttle_state != NULL); 705 706 g_assert(!strcmp(throttle_group_get_name(tgm1), "bar")); 707 g_assert(!strcmp(throttle_group_get_name(tgm2), "foo")); 708 g_assert(tgm1->throttle_state == tgm3->throttle_state); 709 710 /* Setting the config of a group member affects the whole group */ 711 throttle_config_init(&cfg1); 712 cfg1.buckets[THROTTLE_BPS_READ].avg = 500000; 713 cfg1.buckets[THROTTLE_BPS_WRITE].avg = 285000; 714 cfg1.buckets[THROTTLE_OPS_READ].avg = 20000; 715 cfg1.buckets[THROTTLE_OPS_WRITE].avg = 12000; 716 throttle_group_config(tgm1, &cfg1); 717 718 throttle_group_get_config(tgm1, &cfg1); 719 throttle_group_get_config(tgm3, &cfg2); 720 g_assert(!memcmp(&cfg1, &cfg2, sizeof(cfg1))); 721 722 cfg2.buckets[THROTTLE_BPS_READ].avg = 4547; 723 cfg2.buckets[THROTTLE_BPS_WRITE].avg = 1349; 724 cfg2.buckets[THROTTLE_OPS_READ].avg = 123; 725 cfg2.buckets[THROTTLE_OPS_WRITE].avg = 86; 726 throttle_group_config(tgm3, &cfg1); 727 728 throttle_group_get_config(tgm1, &cfg1); 729 throttle_group_get_config(tgm3, &cfg2); 730 g_assert(!memcmp(&cfg1, &cfg2, sizeof(cfg1))); 731 732 throttle_group_unregister_tgm(tgm1); 733 throttle_group_unregister_tgm(tgm2); 734 throttle_group_unregister_tgm(tgm3); 735 736 g_assert(tgm1->throttle_state == NULL); 737 g_assert(tgm2->throttle_state == NULL); 738 g_assert(tgm3->throttle_state == NULL); 739 } 740 741 int main(int argc, char **argv) 742 { 743 qemu_init_main_loop(&error_fatal); 744 ctx = qemu_get_aio_context(); 745 bdrv_init(); 746 module_call_init(MODULE_INIT_QOM); 747 748 do {} while (g_main_context_iteration(NULL, false)); 749 750 /* tests in the same order as the header function declarations */ 751 g_test_init(&argc, &argv, NULL); 752 g_test_add_func("/throttle/leak_bucket", test_leak_bucket); 753 g_test_add_func("/throttle/compute_wait", test_compute_wait); 754 g_test_add_func("/throttle/init", test_init); 755 g_test_add_func("/throttle/destroy", test_destroy); 756 g_test_add_func("/throttle/have_timer", test_have_timer); 757 g_test_add_func("/throttle/detach_attach", test_detach_attach); 758 g_test_add_func("/throttle/config/enabled", test_enabled); 759 g_test_add_func("/throttle/config/conflicting", test_conflicting_config); 760 g_test_add_func("/throttle/config/is_valid", test_is_valid); 761 g_test_add_func("/throttle/config/ranges", test_ranges); 762 g_test_add_func("/throttle/config/max", test_max_is_missing_limit); 763 g_test_add_func("/throttle/config/iops_size", 764 test_iops_size_is_missing_limit); 765 g_test_add_func("/throttle/config_functions", test_config_functions); 766 g_test_add_func("/throttle/accounting", test_accounting); 767 g_test_add_func("/throttle/groups", test_groups); 768 return g_test_run(); 769 } 770 771