include/linux/topology.h

   1 /*
   2  * include/linux/topology.h
   3  *
   4  * Written by: Matthew Dobson, IBM Corporation
   5  *
   6  * Copyright (C) 2002, IBM Corp.
   7  *
   8  * All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18  * NON INFRINGEMENT.  See the GNU General Public License for more
  19  * details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  * Send feedback to <colpatch@us.ibm.com>
  26  */
  27 #ifndef _LINUX_TOPOLOGY_H
  28 #define _LINUX_TOPOLOGY_H
  29
  30 #include <linux/cpumask.h>
  31 #include <linux/bitops.h>
  32 #include <linux/mmzone.h>
  33 #include <linux/smp.h>
  34 #include <linux/percpu.h>
  35 #include <asm/topology.h>
  36
  37 #ifndef node_has_online_mem
  38 #define node_has_online_mem(nid) (1)
  39 #endif
  40
  41 #ifndef nr_cpus_node
  42 #define nr_cpus_node(node) cpumask_weight(cpumask_of_node(node))
  43 #endif
  44
  45 #define for_each_node_with_cpus(node)                   \
  46         for_each_online_node(node)                      \
  47                 if (nr_cpus_node(node))
  48
  49 int arch_update_cpu_topology(void);
  50
  51 /* Conform to ACPI 2.0 SLIT distance definitions */
  52 #define LOCAL_DISTANCE          10
  53 #define REMOTE_DISTANCE         20
  54 #ifndef node_distance
  55 #define node_distance(from,to)  ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE)
  56 #endif
  57 #ifndef RECLAIM_DISTANCE
  58 /*
  59  * If the distance between nodes in a system is larger than RECLAIM_DISTANCE
  60  * (in whatever arch specific measurement units returned by node_distance())
  61  * then switch on zone reclaim on boot.
  62  */
  63 #define RECLAIM_DISTANCE 30
  64 #endif
  65 #ifndef PENALTY_FOR_NODE_WITH_CPUS
  66 #define PENALTY_FOR_NODE_WITH_CPUS      (1)
  67 #endif
  68
  69 /*
  70  * Below are the 3 major initializers used in building sched_domains:
  71  * SD_SIBLING_INIT, for SMT domains
  72  * SD_CPU_INIT, for SMP domains
  73  *
  74  * Any architecture that cares to do any tuning to these values should do so
  75  * by defining their own arch-specific initializer in include/asm/topology.h.
  76  * A definition there will automagically override these default initializers
  77  * and allow arch-specific performance tuning of sched_domains.
  78  * (Only non-zero and non-null fields need be specified.)
  79  */
  80
  81 #ifdef CONFIG_SCHED_SMT
  82 /* MCD - Do we really need this?  It is always on if CONFIG_SCHED_SMT is,
  83  * so can't we drop this in favor of CONFIG_SCHED_SMT?
  84  */
  85 #define ARCH_HAS_SCHED_WAKE_IDLE
  86 /* Common values for SMT siblings */
  87 #ifndef SD_SIBLING_INIT
  88 #define SD_SIBLING_INIT (struct sched_domain) {                         \
  89         .min_interval           = 1,                                    \
  90         .max_interval           = 2,                                    \
  91         .busy_factor            = 64,                                   \
  92         .imbalance_pct          = 110,                                  \
  93                                                                         \
  94         .flags                  = 1*SD_LOAD_BALANCE                     \
  95                                 | 1*SD_BALANCE_NEWIDLE                  \
  96                                 | 1*SD_BALANCE_EXEC                     \
  97                                 | 1*SD_BALANCE_FORK                     \
  98                                 | 0*SD_BALANCE_WAKE                     \
  99                                 | 1*SD_WAKE_AFFINE                      \
 100                                 | 1*SD_SHARE_CPUPOWER                   \
 101                                 | 1*SD_SHARE_PKG_RESOURCES              \
 102                                 | 0*SD_SERIALIZE                        \
 103                                 | 0*SD_PREFER_SIBLING                   \
 104                                 | arch_sd_sibling_asym_packing()        \
 105                                 ,                                       \
 106         .last_balance           = jiffies,                              \
 107         .balance_interval       = 1,                                    \
 108         .smt_gain               = 1178, /* 15% */                       \
 109 }
 110 #endif
 111 #endif /* CONFIG_SCHED_SMT */
 112
 113 #ifdef CONFIG_SCHED_MC
 114 /* Common values for MC siblings. for now mostly derived from SD_CPU_INIT */
 115 #ifndef SD_MC_INIT
 116 #ifdef CONFIG_MT_LOAD_BALANCE_ENHANCEMENT
 117 #define SD_MC_INIT (struct sched_domain) {                              \
 118         .min_interval           = 1,                                    \
 119         .max_interval           = 4,                                    \
 120         .busy_factor            = 64,                                   \
 121         .imbalance_pct          = 125,                                  \
 122         .cache_nice_tries       = 1,                                    \
 123         .busy_idx               = 2,                                    \
 124         .wake_idx               = 0,                                    \
 125         .forkexec_idx           = 0,                                    \
 126                                                                         \
 127         .flags                  = 1*SD_LOAD_BALANCE                     \
 128                                 | 1*SD_BALANCE_NEWIDLE                  \
 129                                 | 1*SD_BALANCE_EXEC                     \
 130                                 | 1*SD_BALANCE_FORK                     \
 131                                 | 1*SD_BALANCE_WAKE                     \
 132                                 | 0*SD_WAKE_AFFINE                      \
 133                                 | 0*SD_SHARE_CPUPOWER                   \
 134                                 | 1*SD_SHARE_PKG_RESOURCES              \
 135                                 | 0*SD_SERIALIZE                        \
 136                                 ,                                       \
 137         .last_balance           = jiffies,                              \
 138         .balance_interval       = 1,                                    \
 139 }
 140 #else
 141 #define SD_MC_INIT (struct sched_domain) {                              \
 142         .min_interval           = 1,                                    \
 143         .max_interval           = 4,                                    \
 144         .busy_factor            = 64,                                   \
 145         .imbalance_pct          = 125,                                  \
 146         .cache_nice_tries       = 1,                                    \
 147         .busy_idx               = 2,                                    \
 148         .wake_idx               = 0,                                    \
 149         .forkexec_idx           = 0,                                    \
 150                                                                         \
 151         .flags                  = 1*SD_LOAD_BALANCE                     \
 152                                 | 1*SD_BALANCE_NEWIDLE                  \
 153                                 | 1*SD_BALANCE_EXEC                     \
 154                                 | 1*SD_BALANCE_FORK                     \
 155                                 | 0*SD_BALANCE_WAKE                     \
 156                                 | 1*SD_WAKE_AFFINE                      \
 157                                 | 0*SD_SHARE_CPUPOWER                   \
 158                                 | 1*SD_SHARE_PKG_RESOURCES              \
 159                                 | 0*SD_SERIALIZE                        \
 160                                 ,                                       \
 161         .last_balance           = jiffies,                              \
 162         .balance_interval       = 1,                                    \
 163 }
 164 #endif
 165 #endif
 166 #endif /* CONFIG_SCHED_MC */
 167
 168 /* Common values for CPUs */
 169 #ifndef SD_CPU_INIT
 170 # ifdef CONFIG_MT_LOAD_BALANCE_ENHANCEMENT
 171 #  ifdef CONFIG_MTK_SCHED_CMP_TGS
 172 #   ifdef CONFIG_MTK_SCHED_CMP_PACK_SMALL_TASK
 173 #define SD_CPU_INIT (struct sched_domain) {                             \
 174         .min_interval           = 1,                                    \
 175         .max_interval           = 4,                                    \
 176         .busy_factor            = 64,                                   \
 177         .imbalance_pct          = 125,                                  \
 178         .cache_nice_tries       = 1,                                    \
 179         .busy_idx               = 2,                                    \
 180         .idle_idx               = 1,                                    \
 181         .newidle_idx            = 0,                                    \
 182         .wake_idx               = 0,                                    \
 183         .forkexec_idx           = 0,                                    \
 184                                                                         \
 185         .flags                  = 1*SD_LOAD_BALANCE                     \
 186                                 | 1*SD_BALANCE_NEWIDLE                  \
 187                                 | 1*SD_BALANCE_EXEC                     \
 188                                 | 1*SD_BALANCE_FORK                     \
 189                                 | 1*SD_BALANCE_WAKE                     \
 190                                 | 0*SD_WAKE_AFFINE                      \
 191                                 | 0*SD_SHARE_CPUPOWER                   \
 192                                 | 0*SD_SHARE_PKG_RESOURCES              \
 193                                 | 0*SD_SERIALIZE                        \
 194                                 | 1*SD_PREFER_SIBLING                   \
 195                                 | arch_sd_share_power_line()    \
 196                                 | 1*SD_BALANCE_TG       \
 197                                 ,                                       \
 198         .last_balance           = jiffies,                              \
 199         .balance_interval       = 1,                                    \
 200 }
 201 #   else
 202 #define SD_CPU_INIT (struct sched_domain) {                             \
 203         .min_interval           = 1,                                    \
 204         .max_interval           = 4,                                    \
 205         .busy_factor            = 64,                                   \
 206         .imbalance_pct          = 125,                                  \
 207         .cache_nice_tries       = 1,                                    \
 208         .busy_idx               = 2,                                    \
 209         .idle_idx               = 1,                                    \
 210         .newidle_idx            = 0,                                    \
 211         .wake_idx               = 0,                                    \
 212         .forkexec_idx           = 0,                                    \
 213                                                                         \
 214         .flags                  = 1*SD_LOAD_BALANCE                     \
 215                                 | 1*SD_BALANCE_NEWIDLE                  \
 216                                 | 1*SD_BALANCE_EXEC                     \
 217                                 | 1*SD_BALANCE_FORK                     \
 218                                 | 1*SD_BALANCE_WAKE                     \
 219                                 | 0*SD_WAKE_AFFINE                      \
 220                                 | 0*SD_SHARE_CPUPOWER                   \
 221                                 | 0*SD_SHARE_PKG_RESOURCES              \
 222                                 | 0*SD_SERIALIZE                        \
 223                                 | 1*SD_PREFER_SIBLING                   \
 224                                 | 1*SD_BALANCE_TG       \
 225                                 ,                                       \
 226         .last_balance           = jiffies,                              \
 227         .balance_interval       = 1,                                    \
 228 }
 229 #   endif
 230 #  else
 231 #   ifdef CONFIG_MTK_SCHED_CMP_PACK_SMALL_TASK
 232 #define SD_CPU_INIT (struct sched_domain) {                             \
 233         .min_interval           = 1,                                    \
 234         .max_interval           = 4,                                    \
 235         .busy_factor            = 64,                                   \
 236         .imbalance_pct          = 125,                                  \
 237         .cache_nice_tries       = 1,                                    \
 238         .busy_idx               = 2,                                    \
 239         .idle_idx               = 1,                                    \
 240         .newidle_idx            = 0,                                    \
 241         .wake_idx               = 0,                                    \
 242         .forkexec_idx           = 0,                                    \
 243                                                                         \
 244         .flags                  = 1*SD_LOAD_BALANCE                     \
 245                                 | 1*SD_BALANCE_NEWIDLE                  \
 246                                 | 1*SD_BALANCE_EXEC                     \
 247                                 | 1*SD_BALANCE_FORK                     \
 248                                 | 1*SD_BALANCE_WAKE                     \
 249                                 | 0*SD_WAKE_AFFINE                      \
 250                                 | 0*SD_SHARE_CPUPOWER                   \
 251                                 | 0*SD_SHARE_PKG_RESOURCES              \
 252                                 | 0*SD_SERIALIZE                        \
 253                                 | 1*SD_PREFER_SIBLING                   \
 254                                 | arch_sd_share_power_line()    \
 255                                 ,                                       \
 256         .last_balance           = jiffies,                              \
 257         .balance_interval       = 1,                                    \
 258 }
 259 #   else
 260 #define SD_CPU_INIT (struct sched_domain) {                             \
 261         .min_interval           = 1,                                    \
 262         .max_interval           = 4,                                    \
 263         .busy_factor            = 64,                                   \
 264         .imbalance_pct          = 125,                                  \
 265         .cache_nice_tries       = 1,                                    \
 266         .busy_idx               = 2,                                    \
 267         .idle_idx               = 1,                                    \
 268         .newidle_idx            = 0,                                    \
 269         .wake_idx               = 0,                                    \
 270         .forkexec_idx           = 0,                                    \
 271                                                                         \
 272         .flags                  = 1*SD_LOAD_BALANCE                     \
 273                                 | 1*SD_BALANCE_NEWIDLE                  \
 274                                 | 1*SD_BALANCE_EXEC                     \
 275                                 | 1*SD_BALANCE_FORK                     \
 276                                 | 1*SD_BALANCE_WAKE                     \
 277                                 | 0*SD_WAKE_AFFINE                      \
 278                                 | 0*SD_SHARE_CPUPOWER                   \
 279                                 | 0*SD_SHARE_PKG_RESOURCES              \
 280                                 | 0*SD_SERIALIZE                        \
 281                                 | 1*SD_PREFER_SIBLING                   \
 282                                 ,                                       \
 283         .last_balance           = jiffies,                              \
 284         .balance_interval       = 1,                                    \
 285 }
 286 #   endif
 287 #  endif
 288
 289 # else  //CONFIG_MT_LOAD_BALANCE_ENHANCEMENT
 290
 291 #  ifdef CONFIG_MTK_SCHED_CMP_TGS
 292 #   ifdef CONFIG_MTK_SCHED_CMP_PACK_SMALL_TASK
 293 #define SD_CPU_INIT (struct sched_domain) {                             \
 294         .min_interval           = 1,                                    \
 295         .max_interval           = 4,                                    \
 296         .busy_factor            = 64,                                   \
 297         .imbalance_pct          = 125,                                  \
 298         .cache_nice_tries       = 1,                                    \
 299         .busy_idx               = 2,                                    \
 300         .idle_idx               = 1,                                    \
 301         .newidle_idx            = 0,                                    \
 302         .wake_idx               = 0,                                    \
 303         .forkexec_idx           = 0,                                    \
 304                                                                         \
 305         .flags                  = 1*SD_LOAD_BALANCE                     \
 306                                 | 1*SD_BALANCE_NEWIDLE                  \
 307                                 | 1*SD_BALANCE_EXEC                     \
 308                                 | 1*SD_BALANCE_FORK                     \
 309                                 | 0*SD_BALANCE_WAKE                     \
 310                                 | 1*SD_WAKE_AFFINE                      \
 311                                 | 0*SD_SHARE_CPUPOWER                   \
 312                                 | 0*SD_SHARE_PKG_RESOURCES              \
 313                                 | 0*SD_SERIALIZE                        \
 314                                 | 1*SD_PREFER_SIBLING                   \
 315                                 | arch_sd_share_power_line()    \
 316                                 | 1*SD_BALANCE_TG       \
 317                                 ,                                       \
 318         .last_balance           = jiffies,                              \
 319         .balance_interval       = 1,                                    \
 320 }
 321 #   else
 322 #define SD_CPU_INIT (struct sched_domain) {                             \
 323         .min_interval           = 1,                                    \
 324         .max_interval           = 4,                                    \
 325         .busy_factor            = 64,                                   \
 326         .imbalance_pct          = 125,                                  \
 327         .cache_nice_tries       = 1,                                    \
 328         .busy_idx               = 2,                                    \
 329         .idle_idx               = 1,                                    \
 330         .newidle_idx            = 0,                                    \
 331         .wake_idx               = 0,                                    \
 332         .forkexec_idx           = 0,                                    \
 333                                                                         \
 334         .flags                  = 1*SD_LOAD_BALANCE                     \
 335                                 | 1*SD_BALANCE_NEWIDLE                  \
 336                                 | 1*SD_BALANCE_EXEC                     \
 337                                 | 1*SD_BALANCE_FORK                     \
 338                                 | 0*SD_BALANCE_WAKE                     \
 339                                 | 1*SD_WAKE_AFFINE                      \
 340                                 | 0*SD_SHARE_CPUPOWER                   \
 341                                 | 0*SD_SHARE_PKG_RESOURCES              \
 342                                 | 0*SD_SERIALIZE                        \
 343                                 | 1*SD_PREFER_SIBLING                   \
 344                                 | 1*SD_BALANCE_TG       \
 345                                 ,                                       \
 346         .last_balance           = jiffies,                              \
 347         .balance_interval       = 1,                                    \
 348 }
 349 #   endif
 350 #  else
 351 #   ifdef CONFIG_MTK_SCHED_CMP_PACK_SMALL_TASK
 352 #define SD_CPU_INIT (struct sched_domain) {                             \
 353         .min_interval           = 1,                                    \
 354         .max_interval           = 4,                                    \
 355         .busy_factor            = 64,                                   \
 356         .imbalance_pct          = 125,                                  \
 357         .cache_nice_tries       = 1,                                    \
 358         .busy_idx               = 2,                                    \
 359         .idle_idx               = 1,                                    \
 360         .newidle_idx            = 0,                                    \
 361         .wake_idx               = 0,                                    \
 362         .forkexec_idx           = 0,                                    \
 363                                                                         \
 364         .flags                  = 1*SD_LOAD_BALANCE                     \
 365                                 | 1*SD_BALANCE_NEWIDLE                  \
 366                                 | 1*SD_BALANCE_EXEC                     \
 367                                 | 1*SD_BALANCE_FORK                     \
 368                                 | 0*SD_BALANCE_WAKE                     \
 369                                 | 1*SD_WAKE_AFFINE                      \
 370                                 | 0*SD_SHARE_CPUPOWER                   \
 371                                 | 0*SD_SHARE_PKG_RESOURCES              \
 372                                 | 0*SD_SERIALIZE                        \
 373                                 | 1*SD_PREFER_SIBLING                   \
 374                                 | arch_sd_share_power_line()    \
 375                                 ,                                       \
 376         .last_balance           = jiffies,                              \
 377         .balance_interval       = 1,                                    \
 378 }
 379 #   else
 380 #define SD_CPU_INIT (struct sched_domain) {                             \
 381         .min_interval           = 1,                                    \
 382         .max_interval           = 4,                                    \
 383         .busy_factor            = 64,                                   \
 384         .imbalance_pct          = 125,                                  \
 385         .cache_nice_tries       = 1,                                    \
 386         .busy_idx               = 2,                                    \
 387         .idle_idx               = 1,                                    \
 388         .newidle_idx            = 0,                                    \
 389         .wake_idx               = 0,                                    \
 390         .forkexec_idx           = 0,                                    \
 391                                                                         \
 392         .flags                  = 1*SD_LOAD_BALANCE                     \
 393                                 | 1*SD_BALANCE_NEWIDLE                  \
 394                                 | 1*SD_BALANCE_EXEC                     \
 395                                 | 1*SD_BALANCE_FORK                     \
 396                                 | 0*SD_BALANCE_WAKE                     \
 397                                 | 1*SD_WAKE_AFFINE                      \
 398                                 | 0*SD_SHARE_CPUPOWER                   \
 399                                 | 0*SD_SHARE_PKG_RESOURCES              \
 400                                 | 0*SD_SERIALIZE                        \
 401                                 | 1*SD_PREFER_SIBLING                   \
 402                                 ,                                       \
 403         .last_balance           = jiffies,                              \
 404         .balance_interval       = 1,                                    \
 405 }
 406 #   endif
 407 #  endif
 408
 409 # endif //CONFIG_MT_LOAD_BALANCE_ENHANCEMENT
 410 #endif
 411
 412 #ifdef CONFIG_SCHED_BOOK
 413 #ifndef SD_BOOK_INIT
 414 #error Please define an appropriate SD_BOOK_INIT in include/asm/topology.h!!!
 415 #endif
 416 #endif /* CONFIG_SCHED_BOOK */
 417
 418 #ifdef CONFIG_USE_PERCPU_NUMA_NODE_ID
 419 DECLARE_PER_CPU(int, numa_node);
 420
 421 #ifndef numa_node_id
 422 /* Returns the number of the current Node. */
 423 static inline int numa_node_id(void)
 424 {
 425         return __this_cpu_read(numa_node);
 426 }
 427 #endif
 428
 429 #ifndef cpu_to_node
 430 static inline int cpu_to_node(int cpu)
 431 {
 432         return per_cpu(numa_node, cpu);
 433 }
 434 #endif
 435
 436 #ifndef set_numa_node
 437 static inline void set_numa_node(int node)
 438 {
 439         this_cpu_write(numa_node, node);
 440 }
 441 #endif
 442
 443 #ifndef set_cpu_numa_node
 444 static inline void set_cpu_numa_node(int cpu, int node)
 445 {
 446         per_cpu(numa_node, cpu) = node;
 447 }
 448 #endif
 449
 450 #else   /* !CONFIG_USE_PERCPU_NUMA_NODE_ID */
 451
 452 /* Returns the number of the current Node. */
 453 #ifndef numa_node_id
 454 static inline int numa_node_id(void)
 455 {
 456         return cpu_to_node(raw_smp_processor_id());
 457 }
 458 #endif
 459
 460 #endif  /* [!]CONFIG_USE_PERCPU_NUMA_NODE_ID */
 461
 462 #ifdef CONFIG_HAVE_MEMORYLESS_NODES
 463
 464 /*
 465  * N.B., Do NOT reference the '_numa_mem_' per cpu variable directly.
 466  * It will not be defined when CONFIG_HAVE_MEMORYLESS_NODES is not defined.
 467  * Use the accessor functions set_numa_mem(), numa_mem_id() and cpu_to_mem().
 468  */
 469 DECLARE_PER_CPU(int, _numa_mem_);
 470
 471 #ifndef set_numa_mem
 472 static inline void set_numa_mem(int node)
 473 {
 474         this_cpu_write(_numa_mem_, node);
 475 }
 476 #endif
 477
 478 #ifndef numa_mem_id
 479 /* Returns the number of the nearest Node with memory */
 480 static inline int numa_mem_id(void)
 481 {
 482         return __this_cpu_read(_numa_mem_);
 483 }
 484 #endif
 485
 486 #ifndef cpu_to_mem
 487 static inline int cpu_to_mem(int cpu)
 488 {
 489         return per_cpu(_numa_mem_, cpu);
 490 }
 491 #endif
 492
 493 #ifndef set_cpu_numa_mem
 494 static inline void set_cpu_numa_mem(int cpu, int node)
 495 {
 496         per_cpu(_numa_mem_, cpu) = node;
 497 }
 498 #endif
 499
 500 #else   /* !CONFIG_HAVE_MEMORYLESS_NODES */
 501
 502 #ifndef numa_mem_id
 503 /* Returns the number of the nearest Node with memory */
 504 static inline int numa_mem_id(void)
 505 {
 506         return numa_node_id();
 507 }
 508 #endif
 509
 510 #ifndef cpu_to_mem
 511 static inline int cpu_to_mem(int cpu)
 512 {
 513         return cpu_to_node(cpu);
 514 }
 515 #endif
 516
 517 #endif  /* [!]CONFIG_HAVE_MEMORYLESS_NODES */
 518
 519 #ifndef topology_physical_package_id
 520 #define topology_physical_package_id(cpu)       ((void)(cpu), -1)
 521 #endif
 522 #ifndef topology_core_id
 523 #define topology_core_id(cpu)                   ((void)(cpu), 0)
 524 #endif
 525 #ifndef topology_thread_cpumask
 526 #define topology_thread_cpumask(cpu)            cpumask_of(cpu)
 527 #endif
 528 #ifndef topology_core_cpumask
 529 #define topology_core_cpumask(cpu)              cpumask_of(cpu)
 530 #endif
 531
 532 #endif /* _LINUX_TOPOLOGY_H */