1 /* 2 * Copyright (c) 2000-2016 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #include <vm/vm_compressor_pager.h> 30 #include <vm/vm_kern.h> 31 #include <vm/vm_page.h> 32 #include <vm/vm_protos.h> 33 #include <vm/WKdm_new.h> 34 #include <vm/vm_object.h> 35 #include <vm/vm_map.h> 36 #include <machine/pmap.h> 37 #include <kern/locks.h> 38 39 #include <sys/kdebug.h> 40 41 #if defined(__arm64__) 42 #include <arm/proc_reg.h> 43 #endif 44 45 #define C_SEG_OFFSET_BITS 16 46 47 #define C_SEG_MAX_POPULATE_SIZE (4 * PAGE_SIZE) 48 49 #if defined(__arm64__) && (DEVELOPMENT || DEBUG) 50 51 #if defined(PLATFORM_WatchOS) 52 #define VALIDATE_C_SEGMENTS (1) 53 #endif 54 #endif /* defined(__arm64__) && (DEVELOPMENT || DEBUG) */ 55 56 57 #if DEBUG || COMPRESSOR_INTEGRITY_CHECKS 58 #define ENABLE_SWAP_CHECKS 1 59 #define ENABLE_COMPRESSOR_CHECKS 1 60 #define POPCOUNT_THE_COMPRESSED_DATA (1) 61 #else 62 #define ENABLE_SWAP_CHECKS 0 63 #define ENABLE_COMPRESSOR_CHECKS 0 64 #endif 65 66 #define CHECKSUM_THE_SWAP ENABLE_SWAP_CHECKS /* Debug swap data */ 67 #define CHECKSUM_THE_DATA ENABLE_COMPRESSOR_CHECKS /* Debug compressor/decompressor data */ 68 #define CHECKSUM_THE_COMPRESSED_DATA ENABLE_COMPRESSOR_CHECKS /* Debug compressor/decompressor compressed data */ 69 70 #ifndef VALIDATE_C_SEGMENTS 71 #define VALIDATE_C_SEGMENTS ENABLE_COMPRESSOR_CHECKS /* Debug compaction */ 72 #endif 73 74 #define RECORD_THE_COMPRESSED_DATA 0 75 76 /* 77 * The c_slot structure embeds a packed pointer to a c_slot_mapping 78 * (32bits) which we ideally want to span as much VA space as possible 79 * to not limit zalloc in how it sets itself up. 80 */ 81 #if !defined(__LP64__) /* no packing */ 82 #define C_SLOT_PACKED_PTR_BITS 32 83 #define C_SLOT_PACKED_PTR_SHIFT 0 84 #define C_SLOT_PACKED_PTR_BASE 0 85 86 #define C_SLOT_C_SIZE_BITS 12 87 #define C_SLOT_C_CODEC_BITS 1 88 #define C_SLOT_C_POPCOUNT_BITS 0 89 #define C_SLOT_C_PADDING_BITS 3 90 91 #elif __APPLE_WKDM_POPCNT_EXTENSIONS__ /* no packing */ 92 #define C_SLOT_PACKED_PTR_BITS 47 93 #define C_SLOT_PACKED_PTR_SHIFT 0 94 #define C_SLOT_PACKED_PTR_BASE ((uintptr_t)KERNEL_PMAP_HEAP_RANGE_START) 95 96 #define C_SLOT_C_SIZE_BITS 14 97 #define C_SLOT_C_CODEC_BITS 1 98 #define C_SLOT_C_POPCOUNT_BITS 18 99 #define C_SLOT_C_PADDING_BITS 0 100 101 #elif defined(__arm64__) /* 32G from the heap start */ 102 #define C_SLOT_PACKED_PTR_BITS 33 103 #define C_SLOT_PACKED_PTR_SHIFT 2 104 #define C_SLOT_PACKED_PTR_BASE ((uintptr_t)KERNEL_PMAP_HEAP_RANGE_START) 105 106 #define C_SLOT_C_SIZE_BITS 14 107 #define C_SLOT_C_CODEC_BITS 1 108 #define C_SLOT_C_POPCOUNT_BITS 0 109 #define C_SLOT_C_PADDING_BITS 0 110 111 #elif defined(__x86_64__) /* 256G from the heap start */ 112 #define C_SLOT_PACKED_PTR_BITS 36 113 #define C_SLOT_PACKED_PTR_SHIFT 2 114 #define C_SLOT_PACKED_PTR_BASE ((uintptr_t)KERNEL_PMAP_HEAP_RANGE_START) 115 116 #define C_SLOT_C_SIZE_BITS 12 117 #define C_SLOT_C_CODEC_BITS 0 /* not used */ 118 #define C_SLOT_C_POPCOUNT_BITS 0 119 #define C_SLOT_C_PADDING_BITS 0 120 121 #else 122 #error vm_compressor parameters undefined for this architecture 123 #endif 124 125 /* 126 * Popcounts needs to represent both 0 and full which requires 127 * (8 ^ C_SLOT_C_SIZE_BITS) + 1 values and (C_SLOT_C_SIZE_BITS + 4) bits. 128 * 129 * We us the (2 * (8 ^ C_SLOT_C_SIZE_BITS) - 1) value to mean "unknown". 130 */ 131 #define C_SLOT_NO_POPCOUNT ((16u << C_SLOT_C_SIZE_BITS) - 1) 132 133 static_assert((C_SEG_OFFSET_BITS + C_SLOT_C_SIZE_BITS + 134 C_SLOT_C_CODEC_BITS + C_SLOT_C_POPCOUNT_BITS + 135 C_SLOT_C_PADDING_BITS + C_SLOT_PACKED_PTR_BITS) % 32 == 0); 136 137 struct c_slot { 138 uint64_t c_offset:C_SEG_OFFSET_BITS; 139 uint64_t c_size:C_SLOT_C_SIZE_BITS; 140 #if C_SLOT_C_CODEC_BITS 141 uint64_t c_codec:C_SLOT_C_CODEC_BITS; 142 #endif 143 #if C_SLOT_C_POPCOUNT_BITS 144 /* 145 * This value may not agree with c_pop_cdata, as it may be the 146 * population count of the uncompressed data. 147 * 148 * This value must be C_SLOT_NO_POPCOUNT when the compression algorithm 149 * cannot provide it. 150 */ 151 uint32_t c_inline_popcount:C_SLOT_C_POPCOUNT_BITS; 152 #endif 153 #if C_SLOT_C_PADDING_BITS 154 uint64_t c_padding:C_SLOT_C_PADDING_BITS; 155 #endif 156 uint64_t c_packed_ptr:C_SLOT_PACKED_PTR_BITS; 157 158 /* debugging fields, typically not present on release kernels */ 159 #if CHECKSUM_THE_DATA 160 unsigned int c_hash_data; 161 #endif 162 #if CHECKSUM_THE_COMPRESSED_DATA 163 unsigned int c_hash_compressed_data; 164 #endif 165 #if POPCOUNT_THE_COMPRESSED_DATA 166 unsigned int c_pop_cdata; 167 #endif 168 } __attribute__((packed, aligned(4))); 169 170 #define C_IS_EMPTY 0 171 #define C_IS_FREE 1 172 #define C_IS_FILLING 2 173 #define C_ON_AGE_Q 3 174 #define C_ON_SWAPOUT_Q 4 175 #define C_ON_SWAPPEDOUT_Q 5 176 #define C_ON_SWAPPEDOUTSPARSE_Q 6 177 #define C_ON_SWAPPEDIN_Q 7 178 #define C_ON_MAJORCOMPACT_Q 8 179 #define C_ON_BAD_Q 9 180 #define C_ON_SWAPIO_Q 10 181 182 183 struct c_segment { 184 lck_mtx_t c_lock; 185 queue_chain_t c_age_list; 186 queue_chain_t c_list; 187 188 #if CONFIG_FREEZE 189 queue_chain_t c_task_list_next_cseg; 190 task_t c_task_owner; 191 #endif /* CONFIG_FREEZE */ 192 193 #define C_SEG_MAX_LIMIT (UINT_MAX) /* this needs to track the size of c_mysegno */ 194 uint32_t c_mysegno; 195 196 uint32_t c_creation_ts; 197 uint64_t c_generation_id; 198 199 int32_t c_bytes_used; 200 int32_t c_bytes_unused; 201 uint32_t c_slots_used; 202 203 uint16_t c_firstemptyslot; 204 uint16_t c_nextslot; 205 uint32_t c_nextoffset; 206 uint32_t c_populated_offset; 207 208 union { 209 int32_t *c_buffer; 210 uint64_t c_swap_handle; 211 } c_store; 212 213 #if VALIDATE_C_SEGMENTS 214 uint32_t c_was_minor_compacted; 215 uint32_t c_was_major_compacted; 216 uint32_t c_was_major_donor; 217 #endif 218 #if CHECKSUM_THE_SWAP 219 unsigned int cseg_hash; 220 unsigned int cseg_swap_size; 221 #endif /* CHECKSUM_THE_SWAP */ 222 223 thread_t c_busy_for_thread; 224 uint32_t c_agedin_ts; 225 uint32_t c_swappedin_ts; 226 bool c_swappedin; 227 /* 228 * Do not pull c_swappedin above into the bitfield below. 229 * We update it without always taking the segment 230 * lock and rely on the segment being busy instead. 231 * The bitfield needs the segment lock. So updating 232 * this state, if in the bitfield, without the lock 233 * will race with the updates to the other fields and 234 * result in a mess. 235 */ 236 uint32_t c_busy:1, 237 c_busy_swapping:1, 238 c_wanted:1, 239 c_on_minorcompact_q:1, /* can also be on the age_q, the majorcompact_q or the swappedin_q */ 240 241 c_state:4, /* what state is the segment in which dictates which q to find it on */ 242 c_overage_swap:1, 243 c_reserved:23; 244 int c_slot_var_array_len; 245 struct c_slot *c_slot_var_array; 246 struct c_slot c_slot_fixed_array[0]; 247 }; 248 249 250 struct c_slot_mapping { 251 uint32_t s_cseg:22, /* segment number + 1 */ 252 s_cindx:10; /* index in the segment */ 253 }; 254 #define C_SLOT_MAX_INDEX (1 << 10) 255 256 typedef struct c_slot_mapping *c_slot_mapping_t; 257 258 259 extern int c_seg_fixed_array_len; 260 extern vm_offset_t c_buffers; 261 #define C_SEG_BUFFER_ADDRESS(c_segno) ((c_buffers + ((uint64_t)c_segno * (uint64_t)c_seg_allocsize))) 262 263 #define C_SEG_SLOT_FROM_INDEX(cseg, index) (index < c_seg_fixed_array_len ? &(cseg->c_slot_fixed_array[index]) : &(cseg->c_slot_var_array[index - c_seg_fixed_array_len])) 264 265 #define C_SEG_OFFSET_TO_BYTES(off) ((off) * (int) sizeof(int32_t)) 266 #define C_SEG_BYTES_TO_OFFSET(bytes) ((bytes) / (int) sizeof(int32_t)) 267 268 #define C_SEG_UNUSED_BYTES(cseg) (cseg->c_bytes_unused + (C_SEG_OFFSET_TO_BYTES(cseg->c_populated_offset - cseg->c_nextoffset))) 269 //todo opensource 270 271 #ifndef __PLATFORM_WKDM_ALIGNMENT_MASK__ 272 #define C_SEG_OFFSET_ALIGNMENT_MASK 0x3ULL 273 #define C_SEG_OFFSET_ALIGNMENT_BOUNDARY 0x4 274 #else 275 #define C_SEG_OFFSET_ALIGNMENT_MASK __PLATFORM_WKDM_ALIGNMENT_MASK__ 276 #define C_SEG_OFFSET_ALIGNMENT_BOUNDARY __PLATFORM_WKDM_ALIGNMENT_BOUNDARY__ 277 #endif 278 279 #define C_SEG_SHOULD_MINORCOMPACT_NOW(cseg) ((C_SEG_UNUSED_BYTES(cseg) >= (c_seg_bufsize / 4)) ? 1 : 0) 280 281 /* 282 * the decsion to force a c_seg to be major compacted is based on 2 criteria 283 * 1) is the c_seg buffer almost empty (i.e. we have a chance to merge it with another c_seg) 284 * 2) are there at least a minimum number of slots unoccupied so that we have a chance 285 * of combining this c_seg with another one. 286 */ 287 #define C_SEG_SHOULD_MAJORCOMPACT_NOW(cseg) \ 288 ((((cseg->c_bytes_unused + (c_seg_bufsize - C_SEG_OFFSET_TO_BYTES(c_seg->c_nextoffset))) >= (c_seg_bufsize / 8)) && \ 289 ((C_SLOT_MAX_INDEX - cseg->c_slots_used) > (c_seg_bufsize / PAGE_SIZE))) \ 290 ? 1 : 0) 291 292 #define C_SEG_ONDISK_IS_SPARSE(cseg) ((cseg->c_bytes_used < cseg->c_bytes_unused) ? 1 : 0) 293 #define C_SEG_IS_ONDISK(cseg) ((cseg->c_state == C_ON_SWAPPEDOUT_Q || cseg->c_state == C_ON_SWAPPEDOUTSPARSE_Q)) 294 #define C_SEG_IS_ON_DISK_OR_SOQ(cseg) ((cseg->c_state == C_ON_SWAPPEDOUT_Q || \ 295 cseg->c_state == C_ON_SWAPPEDOUTSPARSE_Q || \ 296 cseg->c_state == C_ON_SWAPOUT_Q || \ 297 cseg->c_state == C_ON_SWAPIO_Q)) 298 299 300 #define C_SEG_WAKEUP_DONE(cseg) \ 301 MACRO_BEGIN \ 302 assert((cseg)->c_busy); \ 303 (cseg)->c_busy = 0; \ 304 assert((cseg)->c_busy_for_thread != NULL); \ 305 (cseg)->c_busy_for_thread = NULL; \ 306 if ((cseg)->c_wanted) { \ 307 (cseg)->c_wanted = 0; \ 308 thread_wakeup((event_t) (cseg)); \ 309 } \ 310 MACRO_END 311 312 #define C_SEG_BUSY(cseg) \ 313 MACRO_BEGIN \ 314 assert((cseg)->c_busy == 0); \ 315 (cseg)->c_busy = 1; \ 316 assert((cseg)->c_busy_for_thread == NULL); \ 317 (cseg)->c_busy_for_thread = current_thread(); \ 318 MACRO_END 319 320 321 extern vm_map_t compressor_map; 322 323 #if DEVELOPMENT || DEBUG 324 extern boolean_t write_protect_c_segs; 325 extern int vm_compressor_test_seg_wp; 326 327 #define C_SEG_MAKE_WRITEABLE(cseg) \ 328 MACRO_BEGIN \ 329 if (write_protect_c_segs) { \ 330 vm_map_protect(compressor_map, \ 331 (vm_map_offset_t)cseg->c_store.c_buffer, \ 332 (vm_map_offset_t)&cseg->c_store.c_buffer[C_SEG_BYTES_TO_OFFSET(c_seg_allocsize)],\ 333 VM_PROT_READ | VM_PROT_WRITE, \ 334 0); \ 335 } \ 336 MACRO_END 337 338 #define C_SEG_WRITE_PROTECT(cseg) \ 339 MACRO_BEGIN \ 340 if (write_protect_c_segs) { \ 341 vm_map_protect(compressor_map, \ 342 (vm_map_offset_t)cseg->c_store.c_buffer, \ 343 (vm_map_offset_t)&cseg->c_store.c_buffer[C_SEG_BYTES_TO_OFFSET(c_seg_allocsize)],\ 344 VM_PROT_READ, \ 345 0); \ 346 } \ 347 if (vm_compressor_test_seg_wp) { \ 348 volatile uint32_t vmtstmp = *(volatile uint32_t *)cseg->c_store.c_buffer; \ 349 *(volatile uint32_t *)cseg->c_store.c_buffer = 0xDEADABCD; \ 350 (void) vmtstmp; \ 351 } \ 352 MACRO_END 353 #endif 354 355 typedef struct c_segment *c_segment_t; 356 typedef struct c_slot *c_slot_t; 357 358 uint64_t vm_compressor_total_compressions(void); 359 void vm_wake_compactor_swapper(void); 360 void vm_run_compactor(void); 361 void vm_thrashing_jetsam_done(void); 362 void vm_consider_waking_compactor_swapper(void); 363 void vm_consider_swapping(void); 364 void vm_compressor_flush(void); 365 void c_seg_free(c_segment_t); 366 void c_seg_free_locked(c_segment_t); 367 void c_seg_insert_into_age_q(c_segment_t); 368 void c_seg_need_delayed_compaction(c_segment_t, boolean_t); 369 void c_seg_update_task_owner(c_segment_t, task_t); 370 371 void vm_decompressor_lock(void); 372 void vm_decompressor_unlock(void); 373 374 void vm_compressor_delay_trim(void); 375 void vm_compressor_do_warmup(void); 376 void vm_compressor_record_warmup_start(void); 377 void vm_compressor_record_warmup_end(void); 378 379 int vm_wants_task_throttled(task_t); 380 381 extern void vm_compaction_swapper_do_init(void); 382 extern void vm_compressor_swap_init(void); 383 extern lck_rw_t c_master_lock; 384 385 #if ENCRYPTED_SWAP 386 extern void vm_swap_decrypt(c_segment_t); 387 #endif /* ENCRYPTED_SWAP */ 388 389 extern int vm_swap_low_on_space(void); 390 extern int vm_swap_out_of_space(void); 391 extern kern_return_t vm_swap_get(c_segment_t, uint64_t, uint64_t); 392 extern void vm_swap_free(uint64_t); 393 extern void vm_swap_consider_defragmenting(int); 394 395 extern void c_seg_swapin_requeue(c_segment_t, boolean_t, boolean_t, boolean_t); 396 extern int c_seg_swapin(c_segment_t, boolean_t, boolean_t); 397 extern void c_seg_wait_on_busy(c_segment_t); 398 extern void c_seg_trim_tail(c_segment_t); 399 extern void c_seg_switch_state(c_segment_t, int, boolean_t); 400 401 extern boolean_t fastwake_recording_in_progress; 402 extern int compaction_swapper_inited; 403 extern int compaction_swapper_running; 404 extern uint64_t vm_swap_put_failures; 405 406 extern int c_overage_swapped_count; 407 extern int c_overage_swapped_limit; 408 409 extern queue_head_t c_minor_list_head; 410 extern queue_head_t c_age_list_head; 411 extern queue_head_t c_swapout_list_head; 412 extern queue_head_t c_swappedout_list_head; 413 extern queue_head_t c_swappedout_sparse_list_head; 414 415 extern uint32_t c_age_count; 416 extern uint32_t c_swapout_count; 417 extern uint32_t c_swappedout_count; 418 extern uint32_t c_swappedout_sparse_count; 419 420 extern int64_t compressor_bytes_used; 421 extern uint64_t first_c_segment_to_warm_generation_id; 422 extern uint64_t last_c_segment_to_warm_generation_id; 423 extern boolean_t hibernate_flushing; 424 extern boolean_t hibernate_no_swapspace; 425 extern boolean_t hibernate_in_progress_with_pinned_swap; 426 extern boolean_t hibernate_flush_timed_out; 427 extern uint32_t swapout_target_age; 428 429 extern void c_seg_insert_into_q(queue_head_t *, c_segment_t); 430 431 extern uint32_t vm_compressor_minorcompact_threshold_divisor; 432 extern uint32_t vm_compressor_majorcompact_threshold_divisor; 433 extern uint32_t vm_compressor_unthrottle_threshold_divisor; 434 extern uint32_t vm_compressor_catchup_threshold_divisor; 435 436 extern uint32_t vm_compressor_minorcompact_threshold_divisor_overridden; 437 extern uint32_t vm_compressor_majorcompact_threshold_divisor_overridden; 438 extern uint32_t vm_compressor_unthrottle_threshold_divisor_overridden; 439 extern uint32_t vm_compressor_catchup_threshold_divisor_overridden; 440 441 extern uint64_t vm_compressor_compute_elapsed_msecs(clock_sec_t, clock_nsec_t, clock_sec_t, clock_nsec_t); 442 443 extern void kdp_compressor_busy_find_owner(event64_t wait_event, thread_waitinfo_t *waitinfo); 444 445 #define PAGE_REPLACEMENT_DISALLOWED(enable) (enable == TRUE ? lck_rw_lock_shared(&c_master_lock) : lck_rw_done(&c_master_lock)) 446 #define PAGE_REPLACEMENT_ALLOWED(enable) (enable == TRUE ? lck_rw_lock_exclusive(&c_master_lock) : lck_rw_done(&c_master_lock)) 447 448 449 #define AVAILABLE_NON_COMPRESSED_MEMORY (vm_page_active_count + vm_page_inactive_count + vm_page_free_count + vm_page_speculative_count) 450 #define AVAILABLE_MEMORY (AVAILABLE_NON_COMPRESSED_MEMORY + VM_PAGE_COMPRESSOR_COUNT) 451 452 /* 453 * TODO, there may be a minor optimisation opportunity to replace these divisions 454 * with multiplies and shifts 455 * 456 * By multiplying by 10, the divisors can have more precision w/o resorting to floating point... a divisor specified as 25 is in reality a divide by 2.5 457 * By multiplying by 9, you get a number ~11% smaller which allows us to have another limit point derived from the same base 458 * By multiplying by 11, you get a number ~10% bigger which allows us to generate a reset limit derived from the same base which is useful for hysteresis 459 */ 460 461 #define VM_PAGE_COMPRESSOR_COMPACT_THRESHOLD (((AVAILABLE_MEMORY) * 10) / (vm_compressor_minorcompact_threshold_divisor ? vm_compressor_minorcompact_threshold_divisor : 10)) 462 #define VM_PAGE_COMPRESSOR_SWAP_THRESHOLD (((AVAILABLE_MEMORY) * 10) / (vm_compressor_majorcompact_threshold_divisor ? vm_compressor_majorcompact_threshold_divisor : 10)) 463 464 #define VM_PAGE_COMPRESSOR_SWAP_UNTHROTTLE_THRESHOLD (((AVAILABLE_MEMORY) * 10) / (vm_compressor_unthrottle_threshold_divisor ? vm_compressor_unthrottle_threshold_divisor : 10)) 465 #define VM_PAGE_COMPRESSOR_SWAP_RETHROTTLE_THRESHOLD (((AVAILABLE_MEMORY) * 11) / (vm_compressor_unthrottle_threshold_divisor ? vm_compressor_unthrottle_threshold_divisor : 11)) 466 467 #define VM_PAGE_COMPRESSOR_SWAP_HAS_CAUGHTUP_THRESHOLD (((AVAILABLE_MEMORY) * 11) / (vm_compressor_catchup_threshold_divisor ? vm_compressor_catchup_threshold_divisor : 11)) 468 #define VM_PAGE_COMPRESSOR_SWAP_CATCHUP_THRESHOLD (((AVAILABLE_MEMORY) * 10) / (vm_compressor_catchup_threshold_divisor ? vm_compressor_catchup_threshold_divisor : 10)) 469 #define VM_PAGE_COMPRESSOR_HARD_THROTTLE_THRESHOLD (((AVAILABLE_MEMORY) * 9) / (vm_compressor_catchup_threshold_divisor ? vm_compressor_catchup_threshold_divisor : 9)) 470 471 #if !XNU_TARGET_OS_OSX 472 #define AVAILABLE_NON_COMPRESSED_MIN 20000 473 #define COMPRESSOR_NEEDS_TO_SWAP() (((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_SWAP_THRESHOLD) || \ 474 (AVAILABLE_NON_COMPRESSED_MEMORY < AVAILABLE_NON_COMPRESSED_MIN)) ? 1 : 0) 475 #else /* !XNU_TARGET_OS_OSX */ 476 #define COMPRESSOR_NEEDS_TO_SWAP() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_SWAP_THRESHOLD) ? 1 : 0) 477 #endif /* !XNU_TARGET_OS_OSX */ 478 479 #define HARD_THROTTLE_LIMIT_REACHED() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_HARD_THROTTLE_THRESHOLD) ? 1 : 0) 480 #define SWAPPER_NEEDS_TO_UNTHROTTLE() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_SWAP_UNTHROTTLE_THRESHOLD) ? 1 : 0) 481 #define SWAPPER_NEEDS_TO_RETHROTTLE() ((AVAILABLE_NON_COMPRESSED_MEMORY > VM_PAGE_COMPRESSOR_SWAP_RETHROTTLE_THRESHOLD) ? 1 : 0) 482 #define SWAPPER_NEEDS_TO_CATCHUP() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_SWAP_CATCHUP_THRESHOLD) ? 1 : 0) 483 #define SWAPPER_HAS_CAUGHTUP() ((AVAILABLE_NON_COMPRESSED_MEMORY > VM_PAGE_COMPRESSOR_SWAP_HAS_CAUGHTUP_THRESHOLD) ? 1 : 0) 484 #define COMPRESSOR_NEEDS_TO_MINOR_COMPACT() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_COMPACT_THRESHOLD) ? 1 : 0) 485 486 487 #if !XNU_TARGET_OS_OSX 488 #define COMPRESSOR_FREE_RESERVED_LIMIT 28 489 #else /* !XNU_TARGET_OS_OSX */ 490 #define COMPRESSOR_FREE_RESERVED_LIMIT 128 491 #endif /* !XNU_TARGET_OS_OSX */ 492 493 uint32_t vm_compressor_get_encode_scratch_size(void) __pure2; 494 uint32_t vm_compressor_get_decode_scratch_size(void) __pure2; 495 496 #define COMPRESSOR_SCRATCH_BUF_SIZE vm_compressor_get_encode_scratch_size() 497 498 #if RECORD_THE_COMPRESSED_DATA 499 extern void c_compressed_record_init(void); 500 extern void c_compressed_record_write(char *, int); 501 #endif 502 503 extern lck_mtx_t c_list_lock_storage; 504 #define c_list_lock (&c_list_lock_storage) 505 506 #if DEVELOPMENT || DEBUG 507 extern uint32_t vm_ktrace_enabled; 508 509 #define VMKDBG(x, ...) \ 510 MACRO_BEGIN \ 511 if (vm_ktrace_enabled) { \ 512 KDBG(x, ## __VA_ARGS__);\ 513 } \ 514 MACRO_END 515 #endif 516