1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * kernel/sched/debug.c 4 * 5 * Print the CFS rbtree and other debugging details 6 * 7 * Copyright(C) 2007, Red Hat, Inc., Ingo Molnar 8 */ 9 #include <linux/debugfs.h> 10 #include <linux/nmi.h> 11 #include "sched.h" 12 13 /* 14 * This allows printing both to /sys/kernel/debug/sched/debug and 15 * to the console 16 */ 17 #define SEQ_printf(m, x...) \ 18 do { \ 19 if (m) \ 20 seq_printf(m, x); \ 21 else \ 22 pr_cont(x); \ 23 } while (0) 24 25 /* 26 * Ease the printing of nsec fields: 27 */ 28 static long long nsec_high(unsigned long long nsec) 29 { 30 if ((long long)nsec < 0) { 31 nsec = -nsec; 32 do_div(nsec, 1000000); 33 return -nsec; 34 } 35 do_div(nsec, 1000000); 36 37 return nsec; 38 } 39 40 static unsigned long nsec_low(unsigned long long nsec) 41 { 42 if ((long long)nsec < 0) 43 nsec = -nsec; 44 45 return do_div(nsec, 1000000); 46 } 47 48 #define SPLIT_NS(x) nsec_high(x), nsec_low(x) 49 50 #define SCHED_FEAT(name, enabled) \ 51 #name , 52 53 static const char * const sched_feat_names[] = { 54 #include "features.h" 55 }; 56 57 #undef SCHED_FEAT 58 59 static int sched_feat_show(struct seq_file *m, void *v) 60 { 61 int i; 62 63 for (i = 0; i < __SCHED_FEAT_NR; i++) { 64 if (!(sysctl_sched_features & (1UL << i))) 65 seq_puts(m, "NO_"); 66 seq_printf(m, "%s ", sched_feat_names[i]); 67 } 68 seq_puts(m, "\n"); 69 70 return 0; 71 } 72 73 #ifdef CONFIG_JUMP_LABEL 74 75 #define jump_label_key__true STATIC_KEY_INIT_TRUE 76 #define jump_label_key__false STATIC_KEY_INIT_FALSE 77 78 #define SCHED_FEAT(name, enabled) \ 79 jump_label_key__##enabled , 80 81 struct static_key sched_feat_keys[__SCHED_FEAT_NR] = { 82 #include "features.h" 83 }; 84 85 #undef SCHED_FEAT 86 87 static void sched_feat_disable(int i) 88 { 89 static_key_disable_cpuslocked(&sched_feat_keys[i]); 90 } 91 92 static void sched_feat_enable(int i) 93 { 94 static_key_enable_cpuslocked(&sched_feat_keys[i]); 95 } 96 #else /* !CONFIG_JUMP_LABEL: */ 97 static void sched_feat_disable(int i) { }; 98 static void sched_feat_enable(int i) { }; 99 #endif /* !CONFIG_JUMP_LABEL */ 100 101 static int sched_feat_set(char *cmp) 102 { 103 int i; 104 int neg = 0; 105 106 if (strncmp(cmp, "NO_", 3) == 0) { 107 neg = 1; 108 cmp += 3; 109 } 110 111 i = match_string(sched_feat_names, __SCHED_FEAT_NR, cmp); 112 if (i < 0) 113 return i; 114 115 if (neg) { 116 sysctl_sched_features &= ~(1UL << i); 117 sched_feat_disable(i); 118 } else { 119 sysctl_sched_features |= (1UL << i); 120 sched_feat_enable(i); 121 } 122 123 return 0; 124 } 125 126 static ssize_t 127 sched_feat_write(struct file *filp, const char __user *ubuf, 128 size_t cnt, loff_t *ppos) 129 { 130 char buf[64]; 131 char *cmp; 132 int ret; 133 struct inode *inode; 134 135 if (cnt > 63) 136 cnt = 63; 137 138 if (copy_from_user(&buf, ubuf, cnt)) 139 return -EFAULT; 140 141 buf[cnt] = 0; 142 cmp = strstrip(buf); 143 144 /* Ensure the static_key remains in a consistent state */ 145 inode = file_inode(filp); 146 cpus_read_lock(); 147 inode_lock(inode); 148 ret = sched_feat_set(cmp); 149 inode_unlock(inode); 150 cpus_read_unlock(); 151 if (ret < 0) 152 return ret; 153 154 *ppos += cnt; 155 156 return cnt; 157 } 158 159 static int sched_feat_open(struct inode *inode, struct file *filp) 160 { 161 return single_open(filp, sched_feat_show, NULL); 162 } 163 164 static const struct file_operations sched_feat_fops = { 165 .open = sched_feat_open, 166 .write = sched_feat_write, 167 .read = seq_read, 168 .llseek = seq_lseek, 169 .release = single_release, 170 }; 171 172 static ssize_t sched_scaling_write(struct file *filp, const char __user *ubuf, 173 size_t cnt, loff_t *ppos) 174 { 175 unsigned int scaling; 176 int ret; 177 178 ret = kstrtouint_from_user(ubuf, cnt, 10, &scaling); 179 if (ret) 180 return ret; 181 182 if (scaling >= SCHED_TUNABLESCALING_END) 183 return -EINVAL; 184 185 sysctl_sched_tunable_scaling = scaling; 186 if (sched_update_scaling()) 187 return -EINVAL; 188 189 *ppos += cnt; 190 return cnt; 191 } 192 193 static int sched_scaling_show(struct seq_file *m, void *v) 194 { 195 seq_printf(m, "%d\n", sysctl_sched_tunable_scaling); 196 return 0; 197 } 198 199 static int sched_scaling_open(struct inode *inode, struct file *filp) 200 { 201 return single_open(filp, sched_scaling_show, NULL); 202 } 203 204 static const struct file_operations sched_scaling_fops = { 205 .open = sched_scaling_open, 206 .write = sched_scaling_write, 207 .read = seq_read, 208 .llseek = seq_lseek, 209 .release = single_release, 210 }; 211 212 #ifdef CONFIG_PREEMPT_DYNAMIC 213 214 static ssize_t sched_dynamic_write(struct file *filp, const char __user *ubuf, 215 size_t cnt, loff_t *ppos) 216 { 217 char buf[16]; 218 int mode; 219 220 if (cnt > 15) 221 cnt = 15; 222 223 if (copy_from_user(&buf, ubuf, cnt)) 224 return -EFAULT; 225 226 buf[cnt] = 0; 227 mode = sched_dynamic_mode(strstrip(buf)); 228 if (mode < 0) 229 return mode; 230 231 sched_dynamic_update(mode); 232 233 *ppos += cnt; 234 235 return cnt; 236 } 237 238 static int sched_dynamic_show(struct seq_file *m, void *v) 239 { 240 int i = (IS_ENABLED(CONFIG_PREEMPT_RT) || IS_ENABLED(CONFIG_ARCH_HAS_PREEMPT_LAZY)) * 2; 241 int j; 242 243 /* Count entries in NULL terminated preempt_modes */ 244 for (j = 0; preempt_modes[j]; j++) 245 ; 246 j -= !IS_ENABLED(CONFIG_ARCH_HAS_PREEMPT_LAZY); 247 248 for (; i < j; i++) { 249 if (preempt_dynamic_mode == i) 250 seq_puts(m, "("); 251 seq_puts(m, preempt_modes[i]); 252 if (preempt_dynamic_mode == i) 253 seq_puts(m, ")"); 254 255 seq_puts(m, " "); 256 } 257 258 seq_puts(m, "\n"); 259 return 0; 260 } 261 262 static int sched_dynamic_open(struct inode *inode, struct file *filp) 263 { 264 return single_open(filp, sched_dynamic_show, NULL); 265 } 266 267 static const struct file_operations sched_dynamic_fops = { 268 .open = sched_dynamic_open, 269 .write = sched_dynamic_write, 270 .read = seq_read, 271 .llseek = seq_lseek, 272 .release = single_release, 273 }; 274 275 #endif /* CONFIG_PREEMPT_DYNAMIC */ 276 277 __read_mostly bool sched_debug_verbose; 278 279 static struct dentry *sd_dentry; 280 281 282 static ssize_t sched_verbose_write(struct file *filp, const char __user *ubuf, 283 size_t cnt, loff_t *ppos) 284 { 285 ssize_t result; 286 bool orig; 287 288 cpus_read_lock(); 289 sched_domains_mutex_lock(); 290 291 orig = sched_debug_verbose; 292 result = debugfs_write_file_bool(filp, ubuf, cnt, ppos); 293 294 if (sched_debug_verbose && !orig) 295 update_sched_domain_debugfs(); 296 else if (!sched_debug_verbose && orig) { 297 debugfs_remove(sd_dentry); 298 sd_dentry = NULL; 299 } 300 301 sched_domains_mutex_unlock(); 302 cpus_read_unlock(); 303 304 return result; 305 } 306 307 static const struct file_operations sched_verbose_fops = { 308 .read = debugfs_read_file_bool, 309 .write = sched_verbose_write, 310 .open = simple_open, 311 .llseek = default_llseek, 312 }; 313 314 static const struct seq_operations sched_debug_sops; 315 316 static int sched_debug_open(struct inode *inode, struct file *filp) 317 { 318 return seq_open(filp, &sched_debug_sops); 319 } 320 321 static const struct file_operations sched_debug_fops = { 322 .open = sched_debug_open, 323 .read = seq_read, 324 .llseek = seq_lseek, 325 .release = seq_release, 326 }; 327 328 enum dl_param { 329 DL_RUNTIME = 0, 330 DL_PERIOD, 331 }; 332 333 static unsigned long dl_server_period_max = (1UL << 22) * NSEC_PER_USEC; /* ~4 seconds */ 334 static unsigned long dl_server_period_min = (100) * NSEC_PER_USEC; /* 100 us */ 335 336 static ssize_t sched_server_write_common(struct file *filp, const char __user *ubuf, 337 size_t cnt, loff_t *ppos, enum dl_param param, 338 void *server) 339 { 340 long cpu = (long) ((struct seq_file *) filp->private_data)->private; 341 struct sched_dl_entity *dl_se = (struct sched_dl_entity *)server; 342 u64 old_runtime, runtime, period; 343 struct rq *rq = cpu_rq(cpu); 344 int retval = 0; 345 size_t err; 346 u64 value; 347 348 err = kstrtoull_from_user(ubuf, cnt, 10, &value); 349 if (err) 350 return err; 351 352 scoped_guard (rq_lock_irqsave, rq) { 353 old_runtime = runtime = dl_se->dl_runtime; 354 period = dl_se->dl_period; 355 356 switch (param) { 357 case DL_RUNTIME: 358 if (runtime == value) 359 break; 360 runtime = value; 361 break; 362 case DL_PERIOD: 363 if (value == period) 364 break; 365 period = value; 366 break; 367 } 368 369 if (runtime > period || 370 period > dl_server_period_max || 371 period < dl_server_period_min) { 372 return -EINVAL; 373 } 374 375 update_rq_clock(rq); 376 dl_server_stop(dl_se); 377 retval = dl_server_apply_params(dl_se, runtime, period, 0); 378 dl_server_start(dl_se); 379 380 if (retval < 0) 381 return retval; 382 } 383 384 if (!!old_runtime ^ !!runtime) { 385 pr_info("%s server %sabled on CPU %d%s.\n", 386 server == &rq->fair_server ? "Fair" : "Ext", 387 runtime ? "en" : "dis", 388 cpu_of(rq), 389 runtime ? "" : ", system may malfunction due to starvation"); 390 } 391 392 *ppos += cnt; 393 return cnt; 394 } 395 396 static size_t sched_server_show_common(struct seq_file *m, void *v, enum dl_param param, 397 void *server) 398 { 399 struct sched_dl_entity *dl_se = (struct sched_dl_entity *)server; 400 u64 value; 401 402 switch (param) { 403 case DL_RUNTIME: 404 value = dl_se->dl_runtime; 405 break; 406 case DL_PERIOD: 407 value = dl_se->dl_period; 408 break; 409 } 410 411 seq_printf(m, "%llu\n", value); 412 return 0; 413 } 414 415 static ssize_t 416 sched_fair_server_runtime_write(struct file *filp, const char __user *ubuf, 417 size_t cnt, loff_t *ppos) 418 { 419 long cpu = (long) ((struct seq_file *) filp->private_data)->private; 420 struct rq *rq = cpu_rq(cpu); 421 422 return sched_server_write_common(filp, ubuf, cnt, ppos, DL_RUNTIME, 423 &rq->fair_server); 424 } 425 426 static int sched_fair_server_runtime_show(struct seq_file *m, void *v) 427 { 428 unsigned long cpu = (unsigned long) m->private; 429 struct rq *rq = cpu_rq(cpu); 430 431 return sched_server_show_common(m, v, DL_RUNTIME, &rq->fair_server); 432 } 433 434 static int sched_fair_server_runtime_open(struct inode *inode, struct file *filp) 435 { 436 return single_open(filp, sched_fair_server_runtime_show, inode->i_private); 437 } 438 439 static const struct file_operations fair_server_runtime_fops = { 440 .open = sched_fair_server_runtime_open, 441 .write = sched_fair_server_runtime_write, 442 .read = seq_read, 443 .llseek = seq_lseek, 444 .release = single_release, 445 }; 446 447 #ifdef CONFIG_SCHED_CLASS_EXT 448 static ssize_t 449 sched_ext_server_runtime_write(struct file *filp, const char __user *ubuf, 450 size_t cnt, loff_t *ppos) 451 { 452 long cpu = (long) ((struct seq_file *) filp->private_data)->private; 453 struct rq *rq = cpu_rq(cpu); 454 455 return sched_server_write_common(filp, ubuf, cnt, ppos, DL_RUNTIME, 456 &rq->ext_server); 457 } 458 459 static int sched_ext_server_runtime_show(struct seq_file *m, void *v) 460 { 461 unsigned long cpu = (unsigned long) m->private; 462 struct rq *rq = cpu_rq(cpu); 463 464 return sched_server_show_common(m, v, DL_RUNTIME, &rq->ext_server); 465 } 466 467 static int sched_ext_server_runtime_open(struct inode *inode, struct file *filp) 468 { 469 return single_open(filp, sched_ext_server_runtime_show, inode->i_private); 470 } 471 472 static const struct file_operations ext_server_runtime_fops = { 473 .open = sched_ext_server_runtime_open, 474 .write = sched_ext_server_runtime_write, 475 .read = seq_read, 476 .llseek = seq_lseek, 477 .release = single_release, 478 }; 479 #endif /* CONFIG_SCHED_CLASS_EXT */ 480 481 static ssize_t 482 sched_fair_server_period_write(struct file *filp, const char __user *ubuf, 483 size_t cnt, loff_t *ppos) 484 { 485 long cpu = (long) ((struct seq_file *) filp->private_data)->private; 486 struct rq *rq = cpu_rq(cpu); 487 488 return sched_server_write_common(filp, ubuf, cnt, ppos, DL_PERIOD, 489 &rq->fair_server); 490 } 491 492 static int sched_fair_server_period_show(struct seq_file *m, void *v) 493 { 494 unsigned long cpu = (unsigned long) m->private; 495 struct rq *rq = cpu_rq(cpu); 496 497 return sched_server_show_common(m, v, DL_PERIOD, &rq->fair_server); 498 } 499 500 static int sched_fair_server_period_open(struct inode *inode, struct file *filp) 501 { 502 return single_open(filp, sched_fair_server_period_show, inode->i_private); 503 } 504 505 static const struct file_operations fair_server_period_fops = { 506 .open = sched_fair_server_period_open, 507 .write = sched_fair_server_period_write, 508 .read = seq_read, 509 .llseek = seq_lseek, 510 .release = single_release, 511 }; 512 513 #ifdef CONFIG_SCHED_CLASS_EXT 514 static ssize_t 515 sched_ext_server_period_write(struct file *filp, const char __user *ubuf, 516 size_t cnt, loff_t *ppos) 517 { 518 long cpu = (long) ((struct seq_file *) filp->private_data)->private; 519 struct rq *rq = cpu_rq(cpu); 520 521 return sched_server_write_common(filp, ubuf, cnt, ppos, DL_PERIOD, 522 &rq->ext_server); 523 } 524 525 static int sched_ext_server_period_show(struct seq_file *m, void *v) 526 { 527 unsigned long cpu = (unsigned long) m->private; 528 struct rq *rq = cpu_rq(cpu); 529 530 return sched_server_show_common(m, v, DL_PERIOD, &rq->ext_server); 531 } 532 533 static int sched_ext_server_period_open(struct inode *inode, struct file *filp) 534 { 535 return single_open(filp, sched_ext_server_period_show, inode->i_private); 536 } 537 538 static const struct file_operations ext_server_period_fops = { 539 .open = sched_ext_server_period_open, 540 .write = sched_ext_server_period_write, 541 .read = seq_read, 542 .llseek = seq_lseek, 543 .release = single_release, 544 }; 545 #endif /* CONFIG_SCHED_CLASS_EXT */ 546 547 static struct dentry *debugfs_sched; 548 549 static void debugfs_fair_server_init(void) 550 { 551 struct dentry *d_fair; 552 unsigned long cpu; 553 554 d_fair = debugfs_create_dir("fair_server", debugfs_sched); 555 if (!d_fair) 556 return; 557 558 for_each_possible_cpu(cpu) { 559 struct dentry *d_cpu; 560 char buf[32]; 561 562 snprintf(buf, sizeof(buf), "cpu%lu", cpu); 563 d_cpu = debugfs_create_dir(buf, d_fair); 564 565 debugfs_create_file("runtime", 0644, d_cpu, (void *) cpu, &fair_server_runtime_fops); 566 debugfs_create_file("period", 0644, d_cpu, (void *) cpu, &fair_server_period_fops); 567 } 568 } 569 570 #ifdef CONFIG_SCHED_CLASS_EXT 571 static void debugfs_ext_server_init(void) 572 { 573 struct dentry *d_ext; 574 unsigned long cpu; 575 576 d_ext = debugfs_create_dir("ext_server", debugfs_sched); 577 if (!d_ext) 578 return; 579 580 for_each_possible_cpu(cpu) { 581 struct dentry *d_cpu; 582 char buf[32]; 583 584 snprintf(buf, sizeof(buf), "cpu%lu", cpu); 585 d_cpu = debugfs_create_dir(buf, d_ext); 586 587 debugfs_create_file("runtime", 0644, d_cpu, (void *) cpu, &ext_server_runtime_fops); 588 debugfs_create_file("period", 0644, d_cpu, (void *) cpu, &ext_server_period_fops); 589 } 590 } 591 #endif /* CONFIG_SCHED_CLASS_EXT */ 592 593 static __init int sched_init_debug(void) 594 { 595 struct dentry __maybe_unused *numa; 596 597 debugfs_sched = debugfs_create_dir("sched", NULL); 598 599 debugfs_create_file("features", 0644, debugfs_sched, NULL, &sched_feat_fops); 600 debugfs_create_file_unsafe("verbose", 0644, debugfs_sched, &sched_debug_verbose, &sched_verbose_fops); 601 #ifdef CONFIG_PREEMPT_DYNAMIC 602 debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops); 603 #endif 604 605 debugfs_create_u32("base_slice_ns", 0644, debugfs_sched, &sysctl_sched_base_slice); 606 607 debugfs_create_u32("latency_warn_ms", 0644, debugfs_sched, &sysctl_resched_latency_warn_ms); 608 debugfs_create_u32("latency_warn_once", 0644, debugfs_sched, &sysctl_resched_latency_warn_once); 609 610 debugfs_create_file("tunable_scaling", 0644, debugfs_sched, NULL, &sched_scaling_fops); 611 debugfs_create_u32("migration_cost_ns", 0644, debugfs_sched, &sysctl_sched_migration_cost); 612 debugfs_create_u32("nr_migrate", 0644, debugfs_sched, &sysctl_sched_nr_migrate); 613 614 sched_domains_mutex_lock(); 615 update_sched_domain_debugfs(); 616 sched_domains_mutex_unlock(); 617 618 #ifdef CONFIG_NUMA_BALANCING 619 numa = debugfs_create_dir("numa_balancing", debugfs_sched); 620 621 debugfs_create_u32("scan_delay_ms", 0644, numa, &sysctl_numa_balancing_scan_delay); 622 debugfs_create_u32("scan_period_min_ms", 0644, numa, &sysctl_numa_balancing_scan_period_min); 623 debugfs_create_u32("scan_period_max_ms", 0644, numa, &sysctl_numa_balancing_scan_period_max); 624 debugfs_create_u32("scan_size_mb", 0644, numa, &sysctl_numa_balancing_scan_size); 625 debugfs_create_u32("hot_threshold_ms", 0644, numa, &sysctl_numa_balancing_hot_threshold); 626 #endif /* CONFIG_NUMA_BALANCING */ 627 628 debugfs_create_file("debug", 0444, debugfs_sched, NULL, &sched_debug_fops); 629 630 debugfs_fair_server_init(); 631 #ifdef CONFIG_SCHED_CLASS_EXT 632 debugfs_ext_server_init(); 633 #endif 634 635 return 0; 636 } 637 late_initcall(sched_init_debug); 638 639 static cpumask_var_t sd_sysctl_cpus; 640 641 static int sd_flags_show(struct seq_file *m, void *v) 642 { 643 unsigned long flags = *(unsigned int *)m->private; 644 int idx; 645 646 for_each_set_bit(idx, &flags, __SD_FLAG_CNT) { 647 seq_puts(m, sd_flag_debug[idx].name); 648 seq_puts(m, " "); 649 } 650 seq_puts(m, "\n"); 651 652 return 0; 653 } 654 655 static int sd_flags_open(struct inode *inode, struct file *file) 656 { 657 return single_open(file, sd_flags_show, inode->i_private); 658 } 659 660 static const struct file_operations sd_flags_fops = { 661 .open = sd_flags_open, 662 .read = seq_read, 663 .llseek = seq_lseek, 664 .release = single_release, 665 }; 666 667 static void register_sd(struct sched_domain *sd, struct dentry *parent) 668 { 669 #define SDM(type, mode, member) \ 670 debugfs_create_##type(#member, mode, parent, &sd->member) 671 672 SDM(ulong, 0644, min_interval); 673 SDM(ulong, 0644, max_interval); 674 SDM(u64, 0644, max_newidle_lb_cost); 675 SDM(u32, 0644, busy_factor); 676 SDM(u32, 0644, imbalance_pct); 677 SDM(u32, 0644, cache_nice_tries); 678 SDM(str, 0444, name); 679 680 #undef SDM 681 682 debugfs_create_file("flags", 0444, parent, &sd->flags, &sd_flags_fops); 683 debugfs_create_file("groups_flags", 0444, parent, &sd->groups->flags, &sd_flags_fops); 684 debugfs_create_u32("level", 0444, parent, (u32 *)&sd->level); 685 686 if (sd->flags & SD_ASYM_PACKING) 687 debugfs_create_u32("group_asym_prefer_cpu", 0444, parent, 688 (u32 *)&sd->groups->asym_prefer_cpu); 689 } 690 691 void update_sched_domain_debugfs(void) 692 { 693 int cpu, i; 694 695 /* 696 * This can unfortunately be invoked before sched_debug_init() creates 697 * the debug directory. Don't touch sd_sysctl_cpus until then. 698 */ 699 if (!debugfs_sched) 700 return; 701 702 if (!sched_debug_verbose) 703 return; 704 705 if (!cpumask_available(sd_sysctl_cpus)) { 706 if (!alloc_cpumask_var(&sd_sysctl_cpus, GFP_KERNEL)) 707 return; 708 cpumask_copy(sd_sysctl_cpus, cpu_possible_mask); 709 } 710 711 if (!sd_dentry) { 712 sd_dentry = debugfs_create_dir("domains", debugfs_sched); 713 714 /* rebuild sd_sysctl_cpus if empty since it gets cleared below */ 715 if (cpumask_empty(sd_sysctl_cpus)) 716 cpumask_copy(sd_sysctl_cpus, cpu_online_mask); 717 } 718 719 for_each_cpu(cpu, sd_sysctl_cpus) { 720 struct sched_domain *sd; 721 struct dentry *d_cpu; 722 char buf[32]; 723 724 snprintf(buf, sizeof(buf), "cpu%d", cpu); 725 debugfs_lookup_and_remove(buf, sd_dentry); 726 d_cpu = debugfs_create_dir(buf, sd_dentry); 727 728 i = 0; 729 for_each_domain(cpu, sd) { 730 struct dentry *d_sd; 731 732 snprintf(buf, sizeof(buf), "domain%d", i); 733 d_sd = debugfs_create_dir(buf, d_cpu); 734 735 register_sd(sd, d_sd); 736 i++; 737 } 738 739 __cpumask_clear_cpu(cpu, sd_sysctl_cpus); 740 } 741 } 742 743 void dirty_sched_domain_sysctl(int cpu) 744 { 745 if (cpumask_available(sd_sysctl_cpus)) 746 __cpumask_set_cpu(cpu, sd_sysctl_cpus); 747 } 748 749 #ifdef CONFIG_FAIR_GROUP_SCHED 750 static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg) 751 { 752 struct sched_entity *se = tg->se[cpu]; 753 754 #define P(F) SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F) 755 #define P_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld\n", \ 756 #F, (long long)schedstat_val(stats->F)) 757 #define PN(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F)) 758 #define PN_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", \ 759 #F, SPLIT_NS((long long)schedstat_val(stats->F))) 760 761 if (!se) 762 return; 763 764 PN(se->exec_start); 765 PN(se->vruntime); 766 PN(se->sum_exec_runtime); 767 768 if (schedstat_enabled()) { 769 struct sched_statistics *stats; 770 stats = __schedstats_from_se(se); 771 772 PN_SCHEDSTAT(wait_start); 773 PN_SCHEDSTAT(sleep_start); 774 PN_SCHEDSTAT(block_start); 775 PN_SCHEDSTAT(sleep_max); 776 PN_SCHEDSTAT(block_max); 777 PN_SCHEDSTAT(exec_max); 778 PN_SCHEDSTAT(slice_max); 779 PN_SCHEDSTAT(wait_max); 780 PN_SCHEDSTAT(wait_sum); 781 P_SCHEDSTAT(wait_count); 782 } 783 784 P(se->load.weight); 785 P(se->avg.load_avg); 786 P(se->avg.util_avg); 787 P(se->avg.runnable_avg); 788 789 #undef PN_SCHEDSTAT 790 #undef PN 791 #undef P_SCHEDSTAT 792 #undef P 793 } 794 #endif /* CONFIG_FAIR_GROUP_SCHED */ 795 796 #ifdef CONFIG_CGROUP_SCHED 797 static DEFINE_SPINLOCK(sched_debug_lock); 798 static char group_path[PATH_MAX]; 799 800 static void task_group_path(struct task_group *tg, char *path, int plen) 801 { 802 if (autogroup_path(tg, path, plen)) 803 return; 804 805 cgroup_path(tg->css.cgroup, path, plen); 806 } 807 808 /* 809 * Only 1 SEQ_printf_task_group_path() caller can use the full length 810 * group_path[] for cgroup path. Other simultaneous callers will have 811 * to use a shorter stack buffer. A "..." suffix is appended at the end 812 * of the stack buffer so that it will show up in case the output length 813 * matches the given buffer size to indicate possible path name truncation. 814 */ 815 #define SEQ_printf_task_group_path(m, tg, fmt...) \ 816 { \ 817 if (spin_trylock(&sched_debug_lock)) { \ 818 task_group_path(tg, group_path, sizeof(group_path)); \ 819 SEQ_printf(m, fmt, group_path); \ 820 spin_unlock(&sched_debug_lock); \ 821 } else { \ 822 char buf[128]; \ 823 char *bufend = buf + sizeof(buf) - 3; \ 824 task_group_path(tg, buf, bufend - buf); \ 825 strcpy(bufend - 1, "..."); \ 826 SEQ_printf(m, fmt, buf); \ 827 } \ 828 } 829 #endif 830 831 static void 832 print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) 833 { 834 if (task_current(rq, p)) 835 SEQ_printf(m, ">R"); 836 else 837 SEQ_printf(m, " %c", task_state_to_char(p)); 838 839 SEQ_printf(m, " %15s %5d %9Ld.%06ld %c %9Ld.%06ld %c %9Ld.%06ld %9Ld.%06ld %9Ld %5d ", 840 p->comm, task_pid_nr(p), 841 SPLIT_NS(p->se.vruntime), 842 entity_eligible(cfs_rq_of(&p->se), &p->se) ? 'E' : 'N', 843 SPLIT_NS(p->se.deadline), 844 p->se.custom_slice ? 'S' : ' ', 845 SPLIT_NS(p->se.slice), 846 SPLIT_NS(p->se.sum_exec_runtime), 847 (long long)(p->nvcsw + p->nivcsw), 848 p->prio); 849 850 SEQ_printf(m, "%9lld.%06ld %9lld.%06ld %9lld.%06ld", 851 SPLIT_NS(schedstat_val_or_zero(p->stats.wait_sum)), 852 SPLIT_NS(schedstat_val_or_zero(p->stats.sum_sleep_runtime)), 853 SPLIT_NS(schedstat_val_or_zero(p->stats.sum_block_runtime))); 854 855 #ifdef CONFIG_NUMA_BALANCING 856 SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p)); 857 #endif 858 #ifdef CONFIG_CGROUP_SCHED 859 SEQ_printf_task_group_path(m, task_group(p), " %s") 860 #endif 861 862 SEQ_printf(m, "\n"); 863 } 864 865 static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu) 866 { 867 struct task_struct *g, *p; 868 869 SEQ_printf(m, "\n"); 870 SEQ_printf(m, "runnable tasks:\n"); 871 SEQ_printf(m, " S task PID vruntime eligible " 872 "deadline slice sum-exec switches " 873 "prio wait-time sum-sleep sum-block" 874 #ifdef CONFIG_NUMA_BALANCING 875 " node group-id" 876 #endif 877 #ifdef CONFIG_CGROUP_SCHED 878 " group-path" 879 #endif 880 "\n"); 881 SEQ_printf(m, "-------------------------------------------------------" 882 "------------------------------------------------------" 883 "------------------------------------------------------" 884 #ifdef CONFIG_NUMA_BALANCING 885 "--------------" 886 #endif 887 #ifdef CONFIG_CGROUP_SCHED 888 "--------------" 889 #endif 890 "\n"); 891 892 rcu_read_lock(); 893 for_each_process_thread(g, p) { 894 if (task_cpu(p) != rq_cpu) 895 continue; 896 897 print_task(m, rq, p); 898 } 899 rcu_read_unlock(); 900 } 901 902 void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) 903 { 904 s64 left_vruntime = -1, zero_vruntime, right_vruntime = -1, left_deadline = -1, spread; 905 u64 avruntime; 906 struct sched_entity *last, *first, *root; 907 struct rq *rq = cpu_rq(cpu); 908 unsigned long flags; 909 910 #ifdef CONFIG_FAIR_GROUP_SCHED 911 SEQ_printf(m, "\n"); 912 SEQ_printf_task_group_path(m, cfs_rq->tg, "cfs_rq[%d]:%s\n", cpu); 913 #else 914 SEQ_printf(m, "\n"); 915 SEQ_printf(m, "cfs_rq[%d]:\n", cpu); 916 #endif 917 918 raw_spin_rq_lock_irqsave(rq, flags); 919 root = __pick_root_entity(cfs_rq); 920 if (root) 921 left_vruntime = root->min_vruntime; 922 first = __pick_first_entity(cfs_rq); 923 if (first) 924 left_deadline = first->deadline; 925 last = __pick_last_entity(cfs_rq); 926 if (last) 927 right_vruntime = last->vruntime; 928 zero_vruntime = cfs_rq->zero_vruntime; 929 avruntime = avg_vruntime(cfs_rq); 930 raw_spin_rq_unlock_irqrestore(rq, flags); 931 932 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "left_deadline", 933 SPLIT_NS(left_deadline)); 934 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "left_vruntime", 935 SPLIT_NS(left_vruntime)); 936 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "zero_vruntime", 937 SPLIT_NS(zero_vruntime)); 938 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "avg_vruntime", 939 SPLIT_NS(avruntime)); 940 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "right_vruntime", 941 SPLIT_NS(right_vruntime)); 942 spread = right_vruntime - left_vruntime; 943 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread", SPLIT_NS(spread)); 944 SEQ_printf(m, " .%-30s: %d\n", "nr_queued", cfs_rq->nr_queued); 945 SEQ_printf(m, " .%-30s: %d\n", "h_nr_runnable", cfs_rq->h_nr_runnable); 946 SEQ_printf(m, " .%-30s: %d\n", "h_nr_queued", cfs_rq->h_nr_queued); 947 SEQ_printf(m, " .%-30s: %d\n", "h_nr_idle", cfs_rq->h_nr_idle); 948 SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight); 949 SEQ_printf(m, " .%-30s: %lu\n", "load_avg", 950 cfs_rq->avg.load_avg); 951 SEQ_printf(m, " .%-30s: %lu\n", "runnable_avg", 952 cfs_rq->avg.runnable_avg); 953 SEQ_printf(m, " .%-30s: %lu\n", "util_avg", 954 cfs_rq->avg.util_avg); 955 SEQ_printf(m, " .%-30s: %u\n", "util_est", 956 cfs_rq->avg.util_est); 957 SEQ_printf(m, " .%-30s: %ld\n", "removed.load_avg", 958 cfs_rq->removed.load_avg); 959 SEQ_printf(m, " .%-30s: %ld\n", "removed.util_avg", 960 cfs_rq->removed.util_avg); 961 SEQ_printf(m, " .%-30s: %ld\n", "removed.runnable_avg", 962 cfs_rq->removed.runnable_avg); 963 #ifdef CONFIG_FAIR_GROUP_SCHED 964 SEQ_printf(m, " .%-30s: %lu\n", "tg_load_avg_contrib", 965 cfs_rq->tg_load_avg_contrib); 966 SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg", 967 atomic_long_read(&cfs_rq->tg->load_avg)); 968 #endif /* CONFIG_FAIR_GROUP_SCHED */ 969 #ifdef CONFIG_CFS_BANDWIDTH 970 SEQ_printf(m, " .%-30s: %d\n", "throttled", 971 cfs_rq->throttled); 972 SEQ_printf(m, " .%-30s: %d\n", "throttle_count", 973 cfs_rq->throttle_count); 974 #endif 975 976 #ifdef CONFIG_FAIR_GROUP_SCHED 977 print_cfs_group_stats(m, cpu, cfs_rq->tg); 978 #endif 979 } 980 981 void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) 982 { 983 #ifdef CONFIG_RT_GROUP_SCHED 984 SEQ_printf(m, "\n"); 985 SEQ_printf_task_group_path(m, rt_rq->tg, "rt_rq[%d]:%s\n", cpu); 986 #else 987 SEQ_printf(m, "\n"); 988 SEQ_printf(m, "rt_rq[%d]:\n", cpu); 989 #endif 990 991 #define P(x) \ 992 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x)) 993 #define PU(x) \ 994 SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(rt_rq->x)) 995 #define PN(x) \ 996 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x)) 997 998 PU(rt_nr_running); 999 1000 #ifdef CONFIG_RT_GROUP_SCHED 1001 P(rt_throttled); 1002 PN(rt_time); 1003 PN(rt_runtime); 1004 #endif 1005 1006 #undef PN 1007 #undef PU 1008 #undef P 1009 } 1010 1011 void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq) 1012 { 1013 struct dl_bw *dl_bw; 1014 1015 SEQ_printf(m, "\n"); 1016 SEQ_printf(m, "dl_rq[%d]:\n", cpu); 1017 1018 #define PU(x) \ 1019 SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(dl_rq->x)) 1020 1021 PU(dl_nr_running); 1022 dl_bw = &cpu_rq(cpu)->rd->dl_bw; 1023 SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->bw", dl_bw->bw); 1024 SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->total_bw", dl_bw->total_bw); 1025 1026 #undef PU 1027 } 1028 1029 static void print_cpu(struct seq_file *m, int cpu) 1030 { 1031 struct rq *rq = cpu_rq(cpu); 1032 1033 #ifdef CONFIG_X86 1034 { 1035 unsigned int freq = cpu_khz ? : 1; 1036 1037 SEQ_printf(m, "cpu#%d, %u.%03u MHz\n", 1038 cpu, freq / 1000, (freq % 1000)); 1039 } 1040 #else /* !CONFIG_X86: */ 1041 SEQ_printf(m, "cpu#%d\n", cpu); 1042 #endif /* !CONFIG_X86 */ 1043 1044 #define P(x) \ 1045 do { \ 1046 if (sizeof(rq->x) == 4) \ 1047 SEQ_printf(m, " .%-30s: %d\n", #x, (int)(rq->x)); \ 1048 else \ 1049 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\ 1050 } while (0) 1051 1052 #define PN(x) \ 1053 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x)) 1054 1055 P(nr_running); 1056 P(nr_switches); 1057 P(nr_uninterruptible); 1058 PN(next_balance); 1059 SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr))); 1060 PN(clock); 1061 PN(clock_task); 1062 #undef P 1063 #undef PN 1064 1065 #define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n); 1066 P64(avg_idle); 1067 P64(max_idle_balance_cost); 1068 #undef P64 1069 1070 #define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, schedstat_val(rq->n)); 1071 if (schedstat_enabled()) { 1072 P(yld_count); 1073 P(sched_count); 1074 P(sched_goidle); 1075 P(ttwu_count); 1076 P(ttwu_local); 1077 } 1078 #undef P 1079 1080 print_cfs_stats(m, cpu); 1081 print_rt_stats(m, cpu); 1082 print_dl_stats(m, cpu); 1083 1084 print_rq(m, rq, cpu); 1085 SEQ_printf(m, "\n"); 1086 } 1087 1088 static const char *sched_tunable_scaling_names[] = { 1089 "none", 1090 "logarithmic", 1091 "linear" 1092 }; 1093 1094 static void sched_debug_header(struct seq_file *m) 1095 { 1096 u64 ktime, sched_clk, cpu_clk; 1097 unsigned long flags; 1098 1099 local_irq_save(flags); 1100 ktime = ktime_to_ns(ktime_get()); 1101 sched_clk = sched_clock(); 1102 cpu_clk = local_clock(); 1103 local_irq_restore(flags); 1104 1105 SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n", 1106 init_utsname()->release, 1107 (int)strcspn(init_utsname()->version, " "), 1108 init_utsname()->version); 1109 1110 #define P(x) \ 1111 SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x)) 1112 #define PN(x) \ 1113 SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) 1114 PN(ktime); 1115 PN(sched_clk); 1116 PN(cpu_clk); 1117 P(jiffies); 1118 #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK 1119 P(sched_clock_stable()); 1120 #endif 1121 #undef PN 1122 #undef P 1123 1124 SEQ_printf(m, "\n"); 1125 SEQ_printf(m, "sysctl_sched\n"); 1126 1127 #define P(x) \ 1128 SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x)) 1129 #define PN(x) \ 1130 SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) 1131 PN(sysctl_sched_base_slice); 1132 P(sysctl_sched_features); 1133 #undef PN 1134 #undef P 1135 1136 SEQ_printf(m, " .%-40s: %d (%s)\n", 1137 "sysctl_sched_tunable_scaling", 1138 sysctl_sched_tunable_scaling, 1139 sched_tunable_scaling_names[sysctl_sched_tunable_scaling]); 1140 SEQ_printf(m, "\n"); 1141 } 1142 1143 static int sched_debug_show(struct seq_file *m, void *v) 1144 { 1145 int cpu = (unsigned long)(v - 2); 1146 1147 if (cpu != -1) 1148 print_cpu(m, cpu); 1149 else 1150 sched_debug_header(m); 1151 1152 return 0; 1153 } 1154 1155 void sysrq_sched_debug_show(void) 1156 { 1157 int cpu; 1158 1159 sched_debug_header(NULL); 1160 for_each_online_cpu(cpu) { 1161 /* 1162 * Need to reset softlockup watchdogs on all CPUs, because 1163 * another CPU might be blocked waiting for us to process 1164 * an IPI or stop_machine. 1165 */ 1166 touch_nmi_watchdog(); 1167 touch_all_softlockup_watchdogs(); 1168 print_cpu(NULL, cpu); 1169 } 1170 } 1171 1172 /* 1173 * This iterator needs some explanation. 1174 * It returns 1 for the header position. 1175 * This means 2 is CPU 0. 1176 * In a hotplugged system some CPUs, including CPU 0, may be missing so we have 1177 * to use cpumask_* to iterate over the CPUs. 1178 */ 1179 static void *sched_debug_start(struct seq_file *file, loff_t *offset) 1180 { 1181 unsigned long n = *offset; 1182 1183 if (n == 0) 1184 return (void *) 1; 1185 1186 n--; 1187 1188 if (n > 0) 1189 n = cpumask_next(n - 1, cpu_online_mask); 1190 else 1191 n = cpumask_first(cpu_online_mask); 1192 1193 *offset = n + 1; 1194 1195 if (n < nr_cpu_ids) 1196 return (void *)(unsigned long)(n + 2); 1197 1198 return NULL; 1199 } 1200 1201 static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset) 1202 { 1203 (*offset)++; 1204 return sched_debug_start(file, offset); 1205 } 1206 1207 static void sched_debug_stop(struct seq_file *file, void *data) 1208 { 1209 } 1210 1211 static const struct seq_operations sched_debug_sops = { 1212 .start = sched_debug_start, 1213 .next = sched_debug_next, 1214 .stop = sched_debug_stop, 1215 .show = sched_debug_show, 1216 }; 1217 1218 #define __PS(S, F) SEQ_printf(m, "%-45s:%21Ld\n", S, (long long)(F)) 1219 #define __P(F) __PS(#F, F) 1220 #define P(F) __PS(#F, p->F) 1221 #define PM(F, M) __PS(#F, p->F & (M)) 1222 #define __PSN(S, F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", S, SPLIT_NS((long long)(F))) 1223 #define __PN(F) __PSN(#F, F) 1224 #define PN(F) __PSN(#F, p->F) 1225 1226 1227 #ifdef CONFIG_NUMA_BALANCING 1228 void print_numa_stats(struct seq_file *m, int node, unsigned long tsf, 1229 unsigned long tpf, unsigned long gsf, unsigned long gpf) 1230 { 1231 SEQ_printf(m, "numa_faults node=%d ", node); 1232 SEQ_printf(m, "task_private=%lu task_shared=%lu ", tpf, tsf); 1233 SEQ_printf(m, "group_private=%lu group_shared=%lu\n", gpf, gsf); 1234 } 1235 #endif 1236 1237 1238 static void sched_show_numa(struct task_struct *p, struct seq_file *m) 1239 { 1240 #ifdef CONFIG_NUMA_BALANCING 1241 if (p->mm) 1242 P(mm->numa_scan_seq); 1243 1244 P(numa_pages_migrated); 1245 P(numa_preferred_nid); 1246 P(total_numa_faults); 1247 SEQ_printf(m, "current_node=%d, numa_group_id=%d\n", 1248 task_node(p), task_numa_group_id(p)); 1249 show_numa_stats(p, m); 1250 #endif /* CONFIG_NUMA_BALANCING */ 1251 } 1252 1253 void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns, 1254 struct seq_file *m) 1255 { 1256 unsigned long nr_switches; 1257 1258 SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr_ns(p, ns), 1259 get_nr_threads(p)); 1260 SEQ_printf(m, 1261 "---------------------------------------------------------" 1262 "----------\n"); 1263 1264 #define P_SCHEDSTAT(F) __PS(#F, schedstat_val(p->stats.F)) 1265 #define PN_SCHEDSTAT(F) __PSN(#F, schedstat_val(p->stats.F)) 1266 1267 PN(se.exec_start); 1268 PN(se.vruntime); 1269 PN(se.sum_exec_runtime); 1270 1271 nr_switches = p->nvcsw + p->nivcsw; 1272 1273 P(se.nr_migrations); 1274 1275 if (schedstat_enabled()) { 1276 u64 avg_atom, avg_per_cpu; 1277 1278 PN_SCHEDSTAT(sum_sleep_runtime); 1279 PN_SCHEDSTAT(sum_block_runtime); 1280 PN_SCHEDSTAT(wait_start); 1281 PN_SCHEDSTAT(sleep_start); 1282 PN_SCHEDSTAT(block_start); 1283 PN_SCHEDSTAT(sleep_max); 1284 PN_SCHEDSTAT(block_max); 1285 PN_SCHEDSTAT(exec_max); 1286 PN_SCHEDSTAT(slice_max); 1287 PN_SCHEDSTAT(wait_max); 1288 PN_SCHEDSTAT(wait_sum); 1289 P_SCHEDSTAT(wait_count); 1290 PN_SCHEDSTAT(iowait_sum); 1291 P_SCHEDSTAT(iowait_count); 1292 P_SCHEDSTAT(nr_migrations_cold); 1293 P_SCHEDSTAT(nr_failed_migrations_affine); 1294 P_SCHEDSTAT(nr_failed_migrations_running); 1295 P_SCHEDSTAT(nr_failed_migrations_hot); 1296 P_SCHEDSTAT(nr_forced_migrations); 1297 P_SCHEDSTAT(nr_wakeups); 1298 P_SCHEDSTAT(nr_wakeups_sync); 1299 P_SCHEDSTAT(nr_wakeups_migrate); 1300 P_SCHEDSTAT(nr_wakeups_local); 1301 P_SCHEDSTAT(nr_wakeups_remote); 1302 P_SCHEDSTAT(nr_wakeups_affine); 1303 P_SCHEDSTAT(nr_wakeups_affine_attempts); 1304 P_SCHEDSTAT(nr_wakeups_passive); 1305 P_SCHEDSTAT(nr_wakeups_idle); 1306 1307 avg_atom = p->se.sum_exec_runtime; 1308 if (nr_switches) 1309 avg_atom = div64_ul(avg_atom, nr_switches); 1310 else 1311 avg_atom = -1LL; 1312 1313 avg_per_cpu = p->se.sum_exec_runtime; 1314 if (p->se.nr_migrations) { 1315 avg_per_cpu = div64_u64(avg_per_cpu, 1316 p->se.nr_migrations); 1317 } else { 1318 avg_per_cpu = -1LL; 1319 } 1320 1321 __PN(avg_atom); 1322 __PN(avg_per_cpu); 1323 1324 #ifdef CONFIG_SCHED_CORE 1325 PN_SCHEDSTAT(core_forceidle_sum); 1326 #endif 1327 } 1328 1329 __P(nr_switches); 1330 __PS("nr_voluntary_switches", p->nvcsw); 1331 __PS("nr_involuntary_switches", p->nivcsw); 1332 1333 P(se.load.weight); 1334 P(se.avg.load_sum); 1335 P(se.avg.runnable_sum); 1336 P(se.avg.util_sum); 1337 P(se.avg.load_avg); 1338 P(se.avg.runnable_avg); 1339 P(se.avg.util_avg); 1340 P(se.avg.last_update_time); 1341 PM(se.avg.util_est, ~UTIL_AVG_UNCHANGED); 1342 #ifdef CONFIG_UCLAMP_TASK 1343 __PS("uclamp.min", p->uclamp_req[UCLAMP_MIN].value); 1344 __PS("uclamp.max", p->uclamp_req[UCLAMP_MAX].value); 1345 __PS("effective uclamp.min", uclamp_eff_value(p, UCLAMP_MIN)); 1346 __PS("effective uclamp.max", uclamp_eff_value(p, UCLAMP_MAX)); 1347 #endif /* CONFIG_UCLAMP_TASK */ 1348 P(policy); 1349 P(prio); 1350 if (task_has_dl_policy(p)) { 1351 P(dl.runtime); 1352 P(dl.deadline); 1353 } else if (fair_policy(p->policy)) { 1354 P(se.slice); 1355 } 1356 #ifdef CONFIG_SCHED_CLASS_EXT 1357 __PS("ext.enabled", task_on_scx(p)); 1358 #endif 1359 #undef PN_SCHEDSTAT 1360 #undef P_SCHEDSTAT 1361 1362 { 1363 unsigned int this_cpu = raw_smp_processor_id(); 1364 u64 t0, t1; 1365 1366 t0 = cpu_clock(this_cpu); 1367 t1 = cpu_clock(this_cpu); 1368 __PS("clock-delta", t1-t0); 1369 } 1370 1371 sched_show_numa(p, m); 1372 } 1373 1374 void proc_sched_set_task(struct task_struct *p) 1375 { 1376 #ifdef CONFIG_SCHEDSTATS 1377 memset(&p->stats, 0, sizeof(p->stats)); 1378 #endif 1379 } 1380 1381 void resched_latency_warn(int cpu, u64 latency) 1382 { 1383 static DEFINE_RATELIMIT_STATE(latency_check_ratelimit, 60 * 60 * HZ, 1); 1384 1385 if (likely(!__ratelimit(&latency_check_ratelimit))) 1386 return; 1387 1388 pr_err("sched: CPU %d need_resched set for > %llu ns (%d ticks) without schedule\n", 1389 cpu, latency, cpu_rq(cpu)->ticks_without_resched); 1390 dump_stack(); 1391 } 1392