4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
27 * Portions Copyright 2006 OmniTI, Inc.
33 /* #pragma ident "@(#)umem_impl.h 1.6 05/06/08 SMI" */
37 #ifdef HAVE_SYS_SYSMACROS_H
38 #include <sys/sysmacros.h>
49 # include "sol_compat.h"
57 * umem memory allocator: implementation-private data structures
61 * Internal flags for umem_cache_create
63 #define UMC_QCACHE 0x00100000
64 #define UMC_INTERNAL 0x80000000
69 #define UMF_AUDIT 0x00000001 /* transaction auditing */
70 #define UMF_DEADBEEF 0x00000002 /* deadbeef checking */
71 #define UMF_REDZONE 0x00000004 /* redzone checking */
72 #define UMF_CONTENTS 0x00000008 /* freed-buffer content logging */
73 #define UMF_CHECKSIGNAL 0x00000010 /* abort when in signal context */
74 #define UMF_NOMAGAZINE 0x00000020 /* disable per-cpu magazines */
75 #define UMF_FIREWALL 0x00000040 /* put all bufs before unmapped pages */
76 #define UMF_LITE 0x00000100 /* lightweight debugging */
78 #define UMF_HASH 0x00000200 /* cache has hash table */
79 #define UMF_RANDOMIZE 0x00000400 /* randomize other umem_flags */
81 #define UMF_BUFTAG (UMF_DEADBEEF | UMF_REDZONE)
82 #define UMF_TOUCH (UMF_BUFTAG | UMF_LITE | UMF_CONTENTS)
83 #define UMF_RANDOM (UMF_TOUCH | UMF_AUDIT | UMF_NOMAGAZINE)
84 #define UMF_DEBUG (UMF_RANDOM | UMF_FIREWALL)
86 #define UMEM_STACK_DEPTH umem_stack_depth
88 #define UMEM_FREE_PATTERN 0xdeadbeefdeadbeefULL
89 #define UMEM_UNINITIALIZED_PATTERN 0xbaddcafebaddcafeULL
90 #define UMEM_REDZONE_PATTERN 0xfeedfacefeedfaceULL
91 #define UMEM_REDZONE_BYTE 0xbb
93 #define UMEM_FATAL_FLAGS (UMEM_NOFAIL)
94 #define UMEM_SLEEP_FLAGS (0)
97 * Redzone size encodings for umem_alloc() / umem_free(). We encode the
98 * allocation size, rather than storing it directly, so that umem_free()
99 * can distinguish frees of the wrong size from redzone violations.
101 #define UMEM_SIZE_ENCODE(x) (251 * (x) + 1)
102 #define UMEM_SIZE_DECODE(x) ((x) / 251)
103 #define UMEM_SIZE_VALID(x) ((x) % 251 == 1)
106 * The bufctl (buffer control) structure keeps some minimal information
107 * about each buffer: its address, its slab, and its current linkage,
108 * which is either on the slab's freelist (if the buffer is free), or
109 * on the cache's buf-to-bufctl hash table (if the buffer is allocated).
110 * In the case of non-hashed, or "raw", caches (the common case), only
111 * the freelist linkage is necessary: the buffer address is at a fixed
112 * offset from the bufctl address, and the slab is at the end of the page.
114 * NOTE: bc_next must be the first field; raw buffers have linkage only.
116 typedef struct umem_bufctl {
117 struct umem_bufctl *bc_next; /* next bufctl struct */
118 void *bc_addr; /* address of buffer */
119 struct umem_slab *bc_slab; /* controlling slab */
123 * The UMF_AUDIT version of the bufctl structure. The beginning of this
124 * structure must be identical to the normal bufctl structure so that
125 * pointers are interchangeable.
128 #define UMEM_BUFCTL_AUDIT_SIZE_DEPTH(frames) \
129 ((size_t)(&((umem_bufctl_audit_t *)0)->bc_stack[frames]))
132 * umem_bufctl_audits must be allocated from a UMC_NOHASH cache, so we
133 * require that 2 of them, plus 2 buftags, plus a umem_slab_t, all fit on
136 * For ILP32, this is about 1000 frames.
137 * For LP64, this is about 490 frames.
140 #define UMEM_BUFCTL_AUDIT_ALIGN 32
142 #define UMEM_BUFCTL_AUDIT_MAX_SIZE \
143 (P2ALIGN((PAGESIZE - sizeof (umem_slab_t))/2 - \
144 sizeof (umem_buftag_t), UMEM_BUFCTL_AUDIT_ALIGN))
146 #define UMEM_MAX_STACK_DEPTH \
147 ((UMEM_BUFCTL_AUDIT_MAX_SIZE - \
148 UMEM_BUFCTL_AUDIT_SIZE_DEPTH(0)) / sizeof (uintptr_t))
150 typedef struct umem_bufctl_audit {
151 struct umem_bufctl *bc_next; /* next bufctl struct */
152 void *bc_addr; /* address of buffer */
153 struct umem_slab *bc_slab; /* controlling slab */
154 umem_cache_t *bc_cache; /* controlling cache */
155 hrtime_t bc_timestamp; /* transaction time */
156 thread_t bc_thread; /* thread doing transaction */
157 struct umem_bufctl *bc_lastlog; /* last log entry */
158 void *bc_contents; /* contents at last free */
159 int bc_depth; /* stack depth */
160 uintptr_t bc_stack[1]; /* pc stack */
161 } umem_bufctl_audit_t;
163 #define UMEM_LOCAL_BUFCTL_AUDIT(bcpp) \
164 *(bcpp) = (umem_bufctl_audit_t *) \
165 alloca(UMEM_BUFCTL_AUDIT_SIZE)
167 #define UMEM_BUFCTL_AUDIT_SIZE \
168 UMEM_BUFCTL_AUDIT_SIZE_DEPTH(UMEM_STACK_DEPTH)
171 * A umem_buftag structure is appended to each buffer whenever any of the
172 * UMF_BUFTAG flags (UMF_DEADBEEF, UMF_REDZONE, UMF_VERIFY) are set.
174 typedef struct umem_buftag {
175 uint64_t bt_redzone; /* 64-bit redzone pattern */
176 umem_bufctl_t *bt_bufctl; /* bufctl */
177 intptr_t bt_bxstat; /* bufctl ^ (alloc/free) */
180 #define UMEM_BUFTAG(cp, buf) \
181 ((umem_buftag_t *)((char *)(buf) + (cp)->cache_buftag))
183 #define UMEM_BUFCTL(cp, buf) \
184 ((umem_bufctl_t *)((char *)(buf) + (cp)->cache_bufctl))
186 #define UMEM_BUF(cp, bcp) \
187 ((void *)((char *)(bcp) - (cp)->cache_bufctl))
189 #define UMEM_SLAB(cp, buf) \
190 ((umem_slab_t *)P2END((uintptr_t)(buf), (cp)->cache_slabsize) - 1)
192 #define UMEM_CPU_CACHE(cp, cpu) \
193 (umem_cpu_cache_t *)((char *)cp + cpu->cpu_cache_offset)
195 #define UMEM_MAGAZINE_VALID(cp, mp) \
196 (((umem_slab_t *)P2END((uintptr_t)(mp), PAGESIZE) - 1)->slab_cache == \
197 (cp)->cache_magtype->mt_cache)
199 #define UMEM_SLAB_MEMBER(sp, buf) \
200 ((size_t)(buf) - (size_t)(sp)->slab_base < \
201 (sp)->slab_cache->cache_slabsize)
203 #define UMEM_BUFTAG_ALLOC 0xa110c8edUL
204 #define UMEM_BUFTAG_FREE 0xf4eef4eeUL
206 typedef struct umem_slab {
207 struct umem_cache *slab_cache; /* controlling cache */
208 void *slab_base; /* base of allocated memory */
209 struct umem_slab *slab_next; /* next slab on freelist */
210 struct umem_slab *slab_prev; /* prev slab on freelist */
211 struct umem_bufctl *slab_head; /* first free buffer */
212 long slab_refcnt; /* outstanding allocations */
213 long slab_chunks; /* chunks (bufs) in this slab */
216 #define UMEM_HASH_INITIAL 64
218 #define UMEM_HASH(cp, buf) \
219 ((cp)->cache_hash_table + \
220 (((uintptr_t)(buf) >> (cp)->cache_hash_shift) & (cp)->cache_hash_mask))
222 typedef struct umem_magazine {
224 void *mag_round[1]; /* one or more rounds */
228 * The magazine types for fast per-cpu allocation
230 typedef struct umem_magtype {
231 int mt_magsize; /* magazine size (number of rounds) */
232 int mt_align; /* magazine alignment */
233 size_t mt_minbuf; /* all smaller buffers qualify */
234 size_t mt_maxbuf; /* no larger buffers qualify */
235 umem_cache_t *mt_cache; /* magazine cache */
238 #if (defined(__PTHREAD_MUTEX_SIZE__) && __PTHREAD_MUTEX_SIZE__ >= 24) || defined(UMEM_PTHREAD_MUTEX_TOO_BIG)
239 #define UMEM_CPU_CACHE_SIZE 128 /* must be power of 2 */
241 #define UMEM_CPU_CACHE_SIZE 64 /* must be power of 2 */
243 #define UMEM_CPU_PAD (UMEM_CPU_CACHE_SIZE - sizeof (mutex_t) - \
244 2 * sizeof (uint_t) - 2 * sizeof (void *) - 4 * sizeof (int))
245 #define UMEM_CACHE_SIZE(ncpus) \
246 ((size_t)(&((umem_cache_t *)0)->cache_cpu[ncpus]))
248 typedef struct umem_cpu_cache {
249 mutex_t cc_lock; /* protects this cpu's local cache */
250 uint_t cc_alloc; /* allocations from this cpu */
251 uint_t cc_free; /* frees to this cpu */
252 umem_magazine_t *cc_loaded; /* the currently loaded magazine */
253 umem_magazine_t *cc_ploaded; /* the previously loaded magazine */
254 int cc_rounds; /* number of objects in loaded mag */
255 int cc_prounds; /* number of objects in previous mag */
256 int cc_magsize; /* number of rounds in a full mag */
257 int cc_flags; /* CPU-local copy of cache_flags */
258 #if (!defined(_LP64) || defined(UMEM_PTHREAD_MUTEX_TOO_BIG)) && !defined(_WIN32)
259 /* on win32, UMEM_CPU_PAD evaluates to zero, and the MS compiler
260 * won't allow static initialization of arrays containing structures
261 * that contain zero size arrays */
262 char cc_pad[UMEM_CPU_PAD]; /* for nice alignment (32-bit) */
267 * The magazine lists used in the depot.
269 typedef struct umem_maglist {
270 umem_magazine_t *ml_list; /* magazine list */
271 long ml_total; /* number of magazines */
272 long ml_min; /* min since last update */
273 long ml_reaplimit; /* max reapable magazines */
274 uint64_t ml_alloc; /* allocations from this list */
277 #define UMEM_CACHE_NAMELEN 31
283 uint64_t cache_slab_create; /* slab creates */
284 uint64_t cache_slab_destroy; /* slab destroys */
285 uint64_t cache_slab_alloc; /* slab layer allocations */
286 uint64_t cache_slab_free; /* slab layer frees */
287 uint64_t cache_alloc_fail; /* total failed allocations */
288 uint64_t cache_buftotal; /* total buffers */
289 uint64_t cache_bufmax; /* max buffers ever */
290 uint64_t cache_rescale; /* # of hash table rescales */
291 uint64_t cache_lookup_depth; /* hash lookup depth */
292 uint64_t cache_depot_contention; /* mutex contention count */
293 uint64_t cache_depot_contention_prev; /* previous snapshot */
298 char cache_name[UMEM_CACHE_NAMELEN + 1];
299 size_t cache_bufsize; /* object size */
300 size_t cache_align; /* object alignment */
301 umem_constructor_t *cache_constructor;
302 umem_destructor_t *cache_destructor;
303 umem_reclaim_t *cache_reclaim;
304 void *cache_private; /* opaque arg to callbacks */
305 vmem_t *cache_arena; /* vmem source for slabs */
306 int cache_cflags; /* cache creation flags */
307 int cache_flags; /* various cache state info */
308 int cache_uflags; /* UMU_* flags */
309 uint32_t cache_mtbf; /* induced alloc failure rate */
310 umem_cache_t *cache_next; /* forward cache linkage */
311 umem_cache_t *cache_prev; /* backward cache linkage */
312 umem_cache_t *cache_unext; /* next in update list */
313 umem_cache_t *cache_uprev; /* prev in update list */
314 uint32_t cache_cpu_mask; /* mask for cpu offset */
319 mutex_t cache_lock; /* protects slab layer */
320 size_t cache_chunksize; /* buf + alignment [+ debug] */
321 size_t cache_slabsize; /* size of a slab */
322 size_t cache_bufctl; /* buf-to-bufctl distance */
323 size_t cache_buftag; /* buf-to-buftag distance */
324 size_t cache_verify; /* bytes to verify */
325 size_t cache_contents; /* bytes of saved content */
326 size_t cache_color; /* next slab color */
327 size_t cache_mincolor; /* maximum slab color */
328 size_t cache_maxcolor; /* maximum slab color */
329 size_t cache_hash_shift; /* get to interesting bits */
330 size_t cache_hash_mask; /* hash table mask */
331 umem_slab_t *cache_freelist; /* slab free list */
332 umem_slab_t cache_nullslab; /* end of freelist marker */
333 umem_cache_t *cache_bufctl_cache; /* source of bufctls */
334 umem_bufctl_t **cache_hash_table; /* hash table base */
338 mutex_t cache_depot_lock; /* protects depot */
339 umem_magtype_t *cache_magtype; /* magazine type */
340 umem_maglist_t cache_full; /* full magazines */
341 umem_maglist_t cache_empty; /* empty magazines */
346 umem_cpu_cache_t cache_cpu[1]; /* cache_cpu_mask + 1 entries */
349 typedef struct umem_cpu_log_header {
355 char clh_pad[UMEM_CPU_CACHE_SIZE -
356 sizeof (mutex_t) - sizeof (char *) -
357 sizeof (size_t) - 2 * sizeof (int)];
358 } umem_cpu_log_header_t;
360 typedef struct umem_log_header {
369 umem_cpu_log_header_t lh_cpu[1]; /* actually umem_max_ncpus */
372 typedef struct umem_cpu {
373 uint32_t cpu_cache_offset;
377 #define UMEM_MAXBUF 16384
379 #define UMEM_ALIGN 8 /* min guaranteed alignment */
380 #define UMEM_ALIGN_SHIFT 3 /* log2(UMEM_ALIGN) */
381 #define UMEM_VOID_FRACTION 8 /* never waste more than 1/8 of slab */
384 * For 64 bits, buffers >= 16 bytes must be 16-byte aligned
387 #define UMEM_SECOND_ALIGN 16
389 #define UMEM_SECOND_ALIGN UMEM_ALIGN
392 #define MALLOC_MAGIC 0x3a10c000 /* 8-byte tag */
393 #define MEMALIGN_MAGIC 0x3e3a1000
396 #define MALLOC_SECOND_MAGIC 0x16ba7000 /* 8-byte tag, 16-aligned */
397 #define MALLOC_OVERSIZE_MAGIC 0x06e47000 /* 16-byte tag, _LP64 */
400 #define UMEM_MALLOC_ENCODE(type, sz) (uint32_t)((type) - (sz))
401 #define UMEM_MALLOC_DECODE(stat, sz) (uint32_t)((stat) + (sz))
402 #define UMEM_FREE_PATTERN_32 (uint32_t)(UMEM_FREE_PATTERN)
404 #define UMU_MAGAZINE_RESIZE 0x00000001
405 #define UMU_HASH_RESCALE 0x00000002
406 #define UMU_REAP 0x00000004
407 #define UMU_NOTIFY 0x08000000
408 #define UMU_ACTIVE 0x80000000
410 #define UMEM_READY_INIT_FAILED -1
411 #define UMEM_READY_STARTUP 1
412 #define UMEM_READY_INITING 2
415 #ifdef UMEM_STANDALONE
416 extern void umem_startup(caddr_t, size_t, size_t, caddr_t, caddr_t);
417 extern int umem_add(caddr_t, size_t);
424 #endif /* _UMEM_IMPL_H */