| version 1.128.2.6, 2007/08/20 21:27:37 |
version 1.128.2.7, 2007/09/01 12:55:15 |
|
|
| * |
* |
| * This code is derived from software contributed to The NetBSD Foundation |
* This code is derived from software contributed to The NetBSD Foundation |
| * by Paul Kranenburg; by Jason R. Thorpe of the Numerical Aerospace |
* by Paul Kranenburg; by Jason R. Thorpe of the Numerical Aerospace |
| * Simulation Facility, NASA Ames Research Center. |
* Simulation Facility, NASA Ames Research Center, and by Andrew Doran. |
| * |
* |
| * Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
* modification, are permitted provided that the following conditions |
| Line 74 __KERNEL_RCSID(0, "$NetBSD$"); |
|
| Line 74 __KERNEL_RCSID(0, "$NetBSD$"); |
|
| /* List of all pools */ |
/* List of all pools */ |
| LIST_HEAD(,pool) pool_head = LIST_HEAD_INITIALIZER(pool_head); |
LIST_HEAD(,pool) pool_head = LIST_HEAD_INITIALIZER(pool_head); |
| |
|
| |
/* List of all caches. */ |
| |
LIST_HEAD(,pool_cache) pool_cache_head = |
| |
LIST_HEAD_INITIALIZER(pool_cache_head); |
| |
|
| /* Private pool for page header structures */ |
/* Private pool for page header structures */ |
| #define PHPOOL_MAX 8 |
#define PHPOOL_MAX 8 |
| static struct pool phpool[PHPOOL_MAX]; |
static struct pool phpool[PHPOOL_MAX]; |
| Line 91 static void *pool_page_alloc_meta(struct |
|
| Line 95 static void *pool_page_alloc_meta(struct |
|
| static void pool_page_free_meta(struct pool *, void *); |
static void pool_page_free_meta(struct pool *, void *); |
| |
|
| /* allocator for pool metadata */ |
/* allocator for pool metadata */ |
| static struct pool_allocator pool_allocator_meta = { |
struct pool_allocator pool_allocator_meta = { |
| pool_page_alloc_meta, pool_page_free_meta, |
pool_page_alloc_meta, pool_page_free_meta, |
| .pa_backingmapptr = &kmem_map, |
.pa_backingmapptr = &kmem_map, |
| }; |
}; |
| Line 104 static struct pool *drainpp; |
|
| Line 108 static struct pool *drainpp; |
|
| |
|
| /* This lock protects both pool_head and drainpp. */ |
/* This lock protects both pool_head and drainpp. */ |
| static kmutex_t pool_head_lock; |
static kmutex_t pool_head_lock; |
| |
static kcondvar_t pool_busy; |
| |
|
| typedef uint8_t pool_item_freelist_t; |
typedef uint8_t pool_item_freelist_t; |
| |
|
| Line 159 struct pool_item { |
|
| Line 164 struct pool_item { |
|
| * needless object construction/destruction; it is deferred until absolutely |
* needless object construction/destruction; it is deferred until absolutely |
| * necessary. |
* necessary. |
| * |
* |
| * Caches are grouped into cache groups. Each cache group references |
* Caches are grouped into cache groups. Each cache group references up |
| * up to 16 constructed objects. When a cache allocates an object |
* to PCG_NUMOBJECTS constructed objects. When a cache allocates an |
| * from the pool, it calls the object's constructor and places it into |
* object from the pool, it calls the object's constructor and places it |
| * a cache group. When a cache group frees an object back to the pool, |
* into a cache group. When a cache group frees an object back to the |
| * it first calls the object's destructor. This allows the object to |
* pool, it first calls the object's destructor. This allows the object |
| * persist in constructed form while freed to the cache. |
* to persist in constructed form while freed to the cache. |
| * |
* |
| * Multiple caches may exist for each pool. This allows a single |
* The pool references each cache, so that when a pool is drained by the |
| * object type to have multiple constructed forms. The pool references |
* pagedaemon, it can drain each individual cache as well. Each time a |
| * each cache, so that when a pool is drained by the pagedaemon, it can |
* cache is drained, the most idle cache group is freed to the pool in |
| * drain each individual cache as well. Each time a cache is drained, |
* its entirety. |
| * the most idle cache group is freed to the pool in its entirety. |
|
| * |
* |
| * Pool caches are layed on top of pools. By layering them, we can avoid |
* Pool caches are layed on top of pools. By layering them, we can avoid |
| * the complexity of cache management for pools which would not benefit |
* the complexity of cache management for pools which would not benefit |
| * from it. |
* from it. |
| */ |
*/ |
| |
|
| /* The cache group pool. */ |
|
| static struct pool pcgpool; |
static struct pool pcgpool; |
| |
static struct pool cache_pool; |
| |
static struct pool cache_cpu_pool; |
| |
|
| static void pool_cache_reclaim(struct pool_cache *, struct pool_pagelist *, |
static pool_cache_cpu_t *pool_cache_put_slow(pool_cache_cpu_t *, int *, |
| struct pool_cache_grouplist *); |
void *, paddr_t); |
| static void pcg_grouplist_free(struct pool_cache_grouplist *); |
static pool_cache_cpu_t *pool_cache_get_slow(pool_cache_cpu_t *, int *, |
| |
void **, paddr_t *, int); |
| |
static void pool_cache_cpu_init1(struct cpu_info *, pool_cache_t); |
| |
static void pool_cache_invalidate_groups(pool_cache_t, pcg_t *); |
| |
|
| static int pool_catchup(struct pool *); |
static int pool_catchup(struct pool *); |
| static void pool_prime_page(struct pool *, void *, |
static void pool_prime_page(struct pool *, void *, |
| Line 555 pool_subsystem_init(void) |
|
| Line 563 pool_subsystem_init(void) |
|
| struct link_pool_init * const *pi; |
struct link_pool_init * const *pi; |
| |
|
| mutex_init(&pool_head_lock, MUTEX_DEFAULT, IPL_NONE); |
mutex_init(&pool_head_lock, MUTEX_DEFAULT, IPL_NONE); |
| |
cv_init(&pool_busy, "poolbusy"); |
| |
|
| __link_set_foreach(pi, pools) |
__link_set_foreach(pi, pools) |
| pool_init((*pi)->pp, (*pi)->size, (*pi)->align, |
pool_init((*pi)->pp, (*pi)->size, (*pi)->align, |
| Line 567 pool_subsystem_init(void) |
|
| Line 576 pool_subsystem_init(void) |
|
| SLIST_REMOVE_HEAD(&pa_deferinitq, pa_q); |
SLIST_REMOVE_HEAD(&pa_deferinitq, pa_q); |
| pa_reclaim_register(pa); |
pa_reclaim_register(pa); |
| } |
} |
| |
|
| |
pool_init(&cache_pool, sizeof(struct pool_cache), CACHE_LINE_SIZE, |
| |
0, 0, "pcache", &pool_allocator_nointr, IPL_NONE); |
| |
|
| |
pool_init(&cache_cpu_pool, sizeof(pool_cache_cpu_t), CACHE_LINE_SIZE, |
| |
0, 0, "pcachecpu", &pool_allocator_nointr, IPL_NONE); |
| } |
} |
| |
|
| /* |
/* |
| Line 624 pool_init(struct pool *pp, size_t size, |
|
| Line 639 pool_init(struct pool *pp, size_t size, |
|
| |
|
| TAILQ_INIT(&palloc->pa_list); |
TAILQ_INIT(&palloc->pa_list); |
| |
|
| mutex_init(&palloc->pa_lock, MUTEX_DRIVER, IPL_VM); |
mutex_init(&palloc->pa_lock, MUTEX_DEFAULT, IPL_VM); |
| palloc->pa_pagemask = ~(palloc->pa_pagesz - 1); |
palloc->pa_pagemask = ~(palloc->pa_pagesz - 1); |
| palloc->pa_pageshift = ffs(palloc->pa_pagesz) - 1; |
palloc->pa_pageshift = ffs(palloc->pa_pagesz) - 1; |
| |
|
| Line 652 pool_init(struct pool *pp, size_t size, |
|
| Line 667 pool_init(struct pool *pp, size_t size, |
|
| LIST_INIT(&pp->pr_emptypages); |
LIST_INIT(&pp->pr_emptypages); |
| LIST_INIT(&pp->pr_fullpages); |
LIST_INIT(&pp->pr_fullpages); |
| LIST_INIT(&pp->pr_partpages); |
LIST_INIT(&pp->pr_partpages); |
| LIST_INIT(&pp->pr_cachelist); |
pp->pr_cache = NULL; |
| pp->pr_curpage = NULL; |
pp->pr_curpage = NULL; |
| pp->pr_npages = 0; |
pp->pr_npages = 0; |
| pp->pr_minitems = 0; |
pp->pr_minitems = 0; |
| Line 753 pool_init(struct pool *pp, size_t size, |
|
| Line 768 pool_init(struct pool *pp, size_t size, |
|
| pp->pr_npagefree = 0; |
pp->pr_npagefree = 0; |
| pp->pr_hiwat = 0; |
pp->pr_hiwat = 0; |
| pp->pr_nidle = 0; |
pp->pr_nidle = 0; |
| |
pp->pr_refcnt = 0; |
| |
|
| #ifdef POOL_DIAGNOSTIC |
#ifdef POOL_DIAGNOSTIC |
| if (flags & PR_LOGGING) { |
if (flags & PR_LOGGING) { |
| Line 768 pool_init(struct pool *pp, size_t size, |
|
| Line 784 pool_init(struct pool *pp, size_t size, |
|
| pp->pr_entered_file = NULL; |
pp->pr_entered_file = NULL; |
| pp->pr_entered_line = 0; |
pp->pr_entered_line = 0; |
| |
|
| mutex_init(&pp->pr_lock, MUTEX_DRIVER, ipl); |
mutex_init(&pp->pr_lock, MUTEX_DEFAULT, ipl); |
| cv_init(&pp->pr_cv, wchan); |
cv_init(&pp->pr_cv, wchan); |
| pp->pr_ipl = ipl; |
pp->pr_ipl = ipl; |
| |
|
| Line 799 pool_init(struct pool *pp, size_t size, |
|
| Line 815 pool_init(struct pool *pp, size_t size, |
|
| pool_init(&psppool, POOL_SUBPAGE, POOL_SUBPAGE, 0, |
pool_init(&psppool, POOL_SUBPAGE, POOL_SUBPAGE, 0, |
| PR_RECURSIVE, "psppool", &pool_allocator_meta, IPL_VM); |
PR_RECURSIVE, "psppool", &pool_allocator_meta, IPL_VM); |
| #endif |
#endif |
| pool_init(&pcgpool, sizeof(struct pool_cache_group), 0, 0, |
pool_init(&pcgpool, sizeof(pcg_t), CACHE_LINE_SIZE, 0, 0, |
| 0, "pcgpool", &pool_allocator_meta, IPL_VM); |
"cachegrp", &pool_allocator_meta, IPL_VM); |
| } |
} |
| |
|
| if (__predict_true(!cold)) { |
if (__predict_true(!cold)) { |
| Line 832 pool_destroy(struct pool *pp) |
|
| Line 848 pool_destroy(struct pool *pp) |
|
| |
|
| /* Remove from global pool list */ |
/* Remove from global pool list */ |
| mutex_enter(&pool_head_lock); |
mutex_enter(&pool_head_lock); |
| |
while (pp->pr_refcnt != 0) |
| |
cv_wait(&pool_busy, &pool_head_lock); |
| LIST_REMOVE(pp, pr_poollist); |
LIST_REMOVE(pp, pr_poollist); |
| if (drainpp == pp) |
if (drainpp == pp) |
| drainpp = NULL; |
drainpp = NULL; |
| Line 845 pool_destroy(struct pool *pp) |
|
| Line 863 pool_destroy(struct pool *pp) |
|
| |
|
| mutex_enter(&pp->pr_lock); |
mutex_enter(&pp->pr_lock); |
| |
|
| KASSERT(LIST_EMPTY(&pp->pr_cachelist)); |
KASSERT(pp->pr_cache == NULL); |
| |
|
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| if (pp->pr_nout != 0) { |
if (pp->pr_nout != 0) { |
| Line 1550 pool_reclaim(struct pool *pp) |
|
| Line 1568 pool_reclaim(struct pool *pp) |
|
| #endif |
#endif |
| { |
{ |
| struct pool_item_header *ph, *phnext; |
struct pool_item_header *ph, *phnext; |
| struct pool_cache *pc; |
|
| struct pool_pagelist pq; |
struct pool_pagelist pq; |
| struct pool_cache_grouplist pcgl; |
|
| struct timeval curtime, diff; |
struct timeval curtime, diff; |
| |
|
| if (pp->pr_drain_hook != NULL) { |
if (pp->pr_drain_hook != NULL) { |
| Line 1567 pool_reclaim(struct pool *pp) |
|
| Line 1583 pool_reclaim(struct pool *pp) |
|
| pr_enter(pp, file, line); |
pr_enter(pp, file, line); |
| |
|
| LIST_INIT(&pq); |
LIST_INIT(&pq); |
| LIST_INIT(&pcgl); |
|
| |
|
| /* |
/* |
| * Reclaim items from the pool's caches. |
* Reclaim items from the pool's caches. |
| */ |
*/ |
| LIST_FOREACH(pc, &pp->pr_cachelist, pc_poollist) |
if (pp->pr_cache != NULL) |
| pool_cache_reclaim(pc, &pq, &pcgl); |
pool_cache_invalidate(pp->pr_cache); |
| |
|
| getmicrotime(&curtime); |
getmicrotime(&curtime); |
| |
|
| Line 1603 pool_reclaim(struct pool *pp) |
|
| Line 1618 pool_reclaim(struct pool *pp) |
|
| |
|
| pr_leave(pp); |
pr_leave(pp); |
| mutex_exit(&pp->pr_lock); |
mutex_exit(&pp->pr_lock); |
| if (LIST_EMPTY(&pq) && LIST_EMPTY(&pcgl)) |
if (LIST_EMPTY(&pq)) |
| return 0; |
return 0; |
| |
|
| pr_pagelist_free(pp, &pq); |
pr_pagelist_free(pp, &pq); |
| pcg_grouplist_free(&pcgl); |
|
| return (1); |
return (1); |
| } |
} |
| |
|
| Line 1615 pool_reclaim(struct pool *pp) |
|
| Line 1630 pool_reclaim(struct pool *pp) |
|
| * Drain pools, one at a time. |
* Drain pools, one at a time. |
| * |
* |
| * Note, we must never be called from an interrupt context. |
* Note, we must never be called from an interrupt context. |
| * |
|
| * XXX Pool can disappear while draining. |
|
| */ |
*/ |
| void |
void |
| pool_drain(void *arg) |
pool_drain(void *arg) |
| { |
{ |
| struct pool *pp; |
struct pool *pp; |
| int s; |
|
| |
|
| pp = NULL; |
pp = NULL; |
| s = splvm(); /* XXX why? */ |
|
| |
/* Find next pool to drain, and add a reference. */ |
| mutex_enter(&pool_head_lock); |
mutex_enter(&pool_head_lock); |
| if (drainpp == NULL) { |
if (drainpp == NULL) { |
| drainpp = LIST_FIRST(&pool_head); |
drainpp = LIST_FIRST(&pool_head); |
| } |
} |
| if (drainpp) { |
if (drainpp != NULL) { |
| pp = drainpp; |
pp = drainpp; |
| drainpp = LIST_NEXT(pp, pr_poollist); |
drainpp = LIST_NEXT(pp, pr_poollist); |
| } |
} |
| |
if (pp != NULL) |
| |
pp->pr_refcnt++; |
| mutex_exit(&pool_head_lock); |
mutex_exit(&pool_head_lock); |
| if (pp) |
|
| |
/* If we have a candidate, drain it and unlock. */ |
| |
if (pp != NULL) { |
| pool_reclaim(pp); |
pool_reclaim(pp); |
| splx(s); |
mutex_enter(&pool_head_lock); |
| |
pp->pr_refcnt--; |
| |
cv_broadcast(&pool_busy); |
| |
mutex_exit(&pool_head_lock); |
| |
} |
| } |
} |
| |
|
| /* |
/* |
|
|
| pool_print(struct pool *pp, const char *modif) |
pool_print(struct pool *pp, const char *modif) |
| { |
{ |
| |
|
| if (mutex_tryenter(&pp->pr_lock) == 0) { |
|
| printf("pool %s is locked; try again later\n", |
|
| pp->pr_wchan); |
|
| return; |
|
| } |
|
| pool_print1(pp, modif, printf); |
pool_print1(pp, modif, printf); |
| mutex_exit(&pp->pr_lock); |
|
| } |
} |
| |
|
| void |
void |
| Line 1661 pool_printall(const char *modif, void (* |
|
| Line 1676 pool_printall(const char *modif, void (* |
|
| { |
{ |
| struct pool *pp; |
struct pool *pp; |
| |
|
| if (mutex_tryenter(&pool_head_lock) == 0) { |
|
| (*pr)("WARNING: pool_head_slock is locked\n"); |
|
| } else { |
|
| mutex_exit(&pool_head_lock); |
|
| } |
|
| |
|
| LIST_FOREACH(pp, &pool_head, pr_poollist) { |
LIST_FOREACH(pp, &pool_head, pr_poollist) { |
| pool_printit(pp, modif, pr); |
pool_printit(pp, modif, pr); |
| } |
} |
| Line 1681 pool_printit(struct pool *pp, const char |
|
| Line 1690 pool_printit(struct pool *pp, const char |
|
| return; |
return; |
| } |
} |
| |
|
| /* |
|
| * Called from DDB; interrupts should be blocked, and all |
|
| * other processors should be paused. We can skip locking |
|
| * the pool in this case. |
|
| * |
|
| * We do a mutex_tryenter() just to print the lock |
|
| * status, however. |
|
| */ |
|
| |
|
| if (mutex_tryenter(&pp->pr_lock) == 0) |
|
| (*pr)("WARNING: pool %s is locked\n", pp->pr_wchan); |
|
| else |
|
| mutex_exit(&pp->pr_lock); |
|
| |
|
| pool_print1(pp, modif, pr); |
pool_print1(pp, modif, pr); |
| } |
} |
| |
|
|
|
| pool_print1(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) |
pool_print1(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) |
| { |
{ |
| struct pool_item_header *ph; |
struct pool_item_header *ph; |
| struct pool_cache *pc; |
pool_cache_t pc; |
| struct pool_cache_group *pcg; |
pcg_t *pcg; |
| |
pool_cache_cpu_t *cc; |
| |
uint64_t cpuhit, cpumiss; |
| int i, print_log = 0, print_pagelist = 0, print_cache = 0; |
int i, print_log = 0, print_pagelist = 0, print_cache = 0; |
| char c; |
char c; |
| |
|
| Line 1743 pool_print1(struct pool *pp, const char |
|
| Line 1740 pool_print1(struct pool *pp, const char |
|
| print_cache = 1; |
print_cache = 1; |
| } |
} |
| |
|
| (*pr)("POOL %s: size %u, align %u, ioff %u, roflags 0x%08x\n", |
if ((pc = pp->pr_cache) != NULL) { |
| |
(*pr)("POOL CACHE"); |
| |
} else { |
| |
(*pr)("POOL"); |
| |
} |
| |
|
| |
(*pr)(" %s: size %u, align %u, ioff %u, roflags 0x%08x\n", |
| pp->pr_wchan, pp->pr_size, pp->pr_align, pp->pr_itemoffset, |
pp->pr_wchan, pp->pr_size, pp->pr_align, pp->pr_itemoffset, |
| pp->pr_roflags); |
pp->pr_roflags); |
| (*pr)("\talloc %p\n", pp->pr_alloc); |
(*pr)("\talloc %p\n", pp->pr_alloc); |
| Line 1752 pool_print1(struct pool *pp, const char |
|
| Line 1755 pool_print1(struct pool *pp, const char |
|
| (*pr)("\titemsperpage %u, nitems %u, nout %u, hardlimit %u\n", |
(*pr)("\titemsperpage %u, nitems %u, nout %u, hardlimit %u\n", |
| pp->pr_itemsperpage, pp->pr_nitems, pp->pr_nout, pp->pr_hardlimit); |
pp->pr_itemsperpage, pp->pr_nitems, pp->pr_nout, pp->pr_hardlimit); |
| |
|
| (*pr)("\n\tnget %lu, nfail %lu, nput %lu\n", |
(*pr)("\tnget %lu, nfail %lu, nput %lu\n", |
| pp->pr_nget, pp->pr_nfail, pp->pr_nput); |
pp->pr_nget, pp->pr_nfail, pp->pr_nput); |
| (*pr)("\tnpagealloc %lu, npagefree %lu, hiwat %u, nidle %lu\n", |
(*pr)("\tnpagealloc %lu, npagefree %lu, hiwat %u, nidle %lu\n", |
| pp->pr_npagealloc, pp->pr_npagefree, pp->pr_hiwat, pp->pr_nidle); |
pp->pr_npagealloc, pp->pr_npagefree, pp->pr_hiwat, pp->pr_nidle); |
| Line 1787 pool_print1(struct pool *pp, const char |
|
| Line 1790 pool_print1(struct pool *pp, const char |
|
| } |
} |
| |
|
| skip_log: |
skip_log: |
| if (print_cache == 0) |
|
| goto skip_cache; |
|
| |
|
| #define PR_GROUPLIST(pcg) \ |
#define PR_GROUPLIST(pcg) \ |
| (*pr)("\t\tgroup %p: avail %d\n", pcg, pcg->pcg_avail); \ |
(*pr)("\t\tgroup %p: avail %d\n", pcg, pcg->pcg_avail); \ |
| Line 1805 pool_print1(struct pool *pp, const char |
|
| Line 1806 pool_print1(struct pool *pp, const char |
|
| } \ |
} \ |
| } |
} |
| |
|
| LIST_FOREACH(pc, &pp->pr_cachelist, pc_poollist) { |
if (pc != NULL) { |
| (*pr)("\tcache %p\n", pc); |
cpuhit = 0; |
| (*pr)("\t hits %lu misses %lu ngroups %lu nitems %lu\n", |
cpumiss = 0; |
| pc->pc_hits, pc->pc_misses, pc->pc_ngroups, pc->pc_nitems); |
for (i = 0; i < MAXCPUS; i++) { |
| (*pr)("\t full groups:\n"); |
if ((cc = pc->pc_cpus[i]) == NULL) |
| LIST_FOREACH(pcg, &pc->pc_fullgroups, pcg_list) { |
continue; |
| PR_GROUPLIST(pcg); |
cpuhit += cc->cc_hits; |
| } |
cpumiss += cc->cc_misses; |
| (*pr)("\t partial groups:\n"); |
} |
| LIST_FOREACH(pcg, &pc->pc_partgroups, pcg_list) { |
(*pr)("\tcpu layer hits %llu misses %llu\n", cpuhit, cpumiss); |
| PR_GROUPLIST(pcg); |
(*pr)("\tcache layer hits %llu misses %llu\n", |
| } |
pc->pc_hits, pc->pc_misses); |
| (*pr)("\t empty groups:\n"); |
(*pr)("\tcache layer entry uncontended %llu contended %llu\n", |
| LIST_FOREACH(pcg, &pc->pc_emptygroups, pcg_list) { |
pc->pc_hits + pc->pc_misses - pc->pc_contended, |
| PR_GROUPLIST(pcg); |
pc->pc_contended); |
| |
(*pr)("\tcache layer empty groups %u full groups %u\n", |
| |
pc->pc_nempty, pc->pc_nfull); |
| |
if (print_cache) { |
| |
(*pr)("\tfull cache groups:\n"); |
| |
for (pcg = pc->pc_fullgroups; pcg != NULL; |
| |
pcg = pcg->pcg_next) { |
| |
PR_GROUPLIST(pcg); |
| |
} |
| |
(*pr)("\tempty cache groups:\n"); |
| |
for (pcg = pc->pc_emptygroups; pcg != NULL; |
| |
pcg = pcg->pcg_next) { |
| |
PR_GROUPLIST(pcg); |
| |
} |
| } |
} |
| } |
} |
| #undef PR_GROUPLIST |
#undef PR_GROUPLIST |
| |
|
| skip_cache: |
|
| pr_enter_check(pp, pr); |
pr_enter_check(pp, pr); |
| } |
} |
| |
|
|
|
| * pool_cache_init: |
* pool_cache_init: |
| * |
* |
| * Initialize a pool cache. |
* Initialize a pool cache. |
| |
*/ |
| |
pool_cache_t |
| |
pool_cache_init(size_t size, u_int align, u_int align_offset, u_int flags, |
| |
const char *wchan, struct pool_allocator *palloc, int ipl, |
| |
int (*ctor)(void *, void *, int), void (*dtor)(void *, void *), void *arg) |
| |
{ |
| |
pool_cache_t pc; |
| |
|
| |
pc = pool_get(&cache_pool, PR_WAITOK); |
| |
if (pc == NULL) |
| |
return NULL; |
| |
|
| |
pool_cache_bootstrap(pc, size, align, align_offset, flags, wchan, |
| |
palloc, ipl, ctor, dtor, arg); |
| |
|
| |
return pc; |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_bootstrap: |
| * |
* |
| * NOTE: If the pool must be protected from interrupts, we expect |
* Kernel-private version of pool_cache_init(). The caller |
| * to be called at the appropriate interrupt priority level. |
* provides initial storage. |
| */ |
*/ |
| void |
void |
| pool_cache_init(struct pool_cache *pc, struct pool *pp, |
pool_cache_bootstrap(pool_cache_t pc, size_t size, u_int align, |
| int (*ctor)(void *, void *, int), |
u_int align_offset, u_int flags, const char *wchan, |
| void (*dtor)(void *, void *), |
struct pool_allocator *palloc, int ipl, |
| |
int (*ctor)(void *, void *, int), void (*dtor)(void *, void *), |
| void *arg) |
void *arg) |
| { |
{ |
| |
CPU_INFO_ITERATOR cii; |
| |
struct cpu_info *ci; |
| |
struct pool *pp; |
| |
|
| LIST_INIT(&pc->pc_emptygroups); |
pp = &pc->pc_pool; |
| LIST_INIT(&pc->pc_fullgroups); |
if (palloc == NULL && ipl == IPL_NONE) |
| LIST_INIT(&pc->pc_partgroups); |
palloc = &pool_allocator_nointr; |
| mutex_init(&pc->pc_lock, MUTEX_DRIVER, pp->pr_ipl); |
pool_init(pp, size, align, align_offset, flags, wchan, palloc, ipl); |
| |
|
| pc->pc_pool = pp; |
mutex_init(&pc->pc_lock, MUTEX_DEFAULT, pp->pr_ipl); |
| |
|
| |
pc->pc_emptygroups = NULL; |
| |
pc->pc_fullgroups = NULL; |
| pc->pc_ctor = ctor; |
pc->pc_ctor = ctor; |
| pc->pc_dtor = dtor; |
pc->pc_dtor = dtor; |
| pc->pc_arg = arg; |
pc->pc_arg = arg; |
| |
pc->pc_hits = 0; |
| pc->pc_hits = 0; |
|
| pc->pc_misses = 0; |
pc->pc_misses = 0; |
| |
pc->pc_nempty = 0; |
| pc->pc_ngroups = 0; |
pc->pc_nfull = 0; |
| |
pc->pc_contended = 0; |
| pc->pc_nitems = 0; |
pc->pc_refcnt = 0; |
| |
|
| |
/* Allocate per-CPU caches. */ |
| |
memset(pc->pc_cpus, 0, sizeof(pc->pc_cpus)); |
| |
pc->pc_ncpu = 0; |
| |
for (CPU_INFO_FOREACH(cii, ci)) { |
| |
pool_cache_cpu_init1(ci, pc); |
| |
} |
| |
|
| if (__predict_true(!cold)) { |
if (__predict_true(!cold)) { |
| mutex_enter(&pp->pr_lock); |
mutex_enter(&pp->pr_lock); |
| LIST_INSERT_HEAD(&pp->pr_cachelist, pc, pc_poollist); |
pp->pr_cache = pc; |
| mutex_exit(&pp->pr_lock); |
mutex_exit(&pp->pr_lock); |
| } else |
mutex_enter(&pool_head_lock); |
| LIST_INSERT_HEAD(&pp->pr_cachelist, pc, pc_poollist); |
LIST_INSERT_HEAD(&pool_cache_head, pc, pc_cachelist); |
| |
mutex_exit(&pool_head_lock); |
| |
} else { |
| |
pp->pr_cache = pc; |
| |
LIST_INSERT_HEAD(&pool_cache_head, pc, pc_cachelist); |
| |
} |
| } |
} |
| |
|
| /* |
/* |
| Line 1964 pool_cache_init(struct pool_cache *pc, s |
|
| Line 2014 pool_cache_init(struct pool_cache *pc, s |
|
| * Destroy a pool cache. |
* Destroy a pool cache. |
| */ |
*/ |
| void |
void |
| pool_cache_destroy(struct pool_cache *pc) |
pool_cache_destroy(pool_cache_t pc) |
| { |
{ |
| struct pool *pp = pc->pc_pool; |
struct pool *pp = &pc->pc_pool; |
| |
pool_cache_cpu_t *cc; |
| |
pcg_t *pcg; |
| |
int i; |
| |
|
| |
/* Remove it from the global list. */ |
| |
mutex_enter(&pool_head_lock); |
| |
while (pc->pc_refcnt != 0) |
| |
cv_wait(&pool_busy, &pool_head_lock); |
| |
LIST_REMOVE(pc, pc_cachelist); |
| |
mutex_exit(&pool_head_lock); |
| |
|
| /* First, invalidate the entire cache. */ |
/* First, invalidate the entire cache. */ |
| pool_cache_invalidate(pc); |
pool_cache_invalidate(pc); |
| |
|
| /* ...and remove it from the pool's cache list. */ |
/* Disassociate it from the pool. */ |
| mutex_enter(&pp->pr_lock); |
mutex_enter(&pp->pr_lock); |
| LIST_REMOVE(pc, pc_poollist); |
pp->pr_cache = NULL; |
| mutex_exit(&pp->pr_lock); |
mutex_exit(&pp->pr_lock); |
| |
|
| |
/* Destroy per-CPU data */ |
| |
for (i = 0; i < MAXCPUS; i++) { |
| |
if ((cc = pc->pc_cpus[i]) == NULL) |
| |
continue; |
| |
if ((pcg = cc->cc_current) != NULL) { |
| |
pcg->pcg_next = NULL; |
| |
pool_cache_invalidate_groups(pc, pcg); |
| |
} |
| |
if ((pcg = cc->cc_previous) != NULL) { |
| |
pcg->pcg_next = NULL; |
| |
pool_cache_invalidate_groups(pc, pcg); |
| |
} |
| |
if (cc != &pc->pc_cpu0) |
| |
pool_put(&cache_cpu_pool, cc); |
| |
} |
| |
|
| |
/* Finally, destroy it. */ |
| mutex_destroy(&pc->pc_lock); |
mutex_destroy(&pc->pc_lock); |
| |
pool_destroy(pp); |
| |
pool_put(&cache_pool, pc); |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_cpu_init1: |
| |
* |
| |
* Called for each pool_cache whenever a new CPU is attached. |
| |
*/ |
| |
static void |
| |
pool_cache_cpu_init1(struct cpu_info *ci, pool_cache_t pc) |
| |
{ |
| |
pool_cache_cpu_t *cc; |
| |
|
| |
KASSERT(((uintptr_t)pc->pc_cpus & (CACHE_LINE_SIZE - 1)) == 0); |
| |
|
| |
if ((cc = pc->pc_cpus[ci->ci_index]) != NULL) { |
| |
KASSERT(cc->cc_cpu = ci); |
| |
return; |
| |
} |
| |
|
| |
/* |
| |
* The first CPU is 'free'. This needs to be the case for |
| |
* bootstrap - we may not be able to allocate yet. |
| |
*/ |
| |
if (pc->pc_ncpu == 0) { |
| |
cc = &pc->pc_cpu0; |
| |
pc->pc_ncpu = 1; |
| |
} else { |
| |
mutex_enter(&pc->pc_lock); |
| |
pc->pc_ncpu++; |
| |
mutex_exit(&pc->pc_lock); |
| |
cc = pool_get(&cache_cpu_pool, PR_WAITOK); |
| |
} |
| |
|
| |
cc->cc_ipl = pc->pc_pool.pr_ipl; |
| |
cc->cc_iplcookie = makeiplcookie(cc->cc_ipl); |
| |
cc->cc_cache = pc; |
| |
cc->cc_cpu = ci; |
| |
cc->cc_hits = 0; |
| |
cc->cc_misses = 0; |
| |
cc->cc_current = NULL; |
| |
cc->cc_previous = NULL; |
| |
cc->cc_busy = NULL; |
| |
|
| |
pc->pc_cpus[ci->ci_index] = cc; |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_cpu_init: |
| |
* |
| |
* Called whenever a new CPU is attached. |
| |
*/ |
| |
void |
| |
pool_cache_cpu_init(struct cpu_info *ci) |
| |
{ |
| |
pool_cache_t pc; |
| |
|
| |
mutex_enter(&pool_head_lock); |
| |
LIST_FOREACH(pc, &pool_cache_head, pc_cachelist) { |
| |
pc->pc_refcnt++; |
| |
mutex_exit(&pool_head_lock); |
| |
|
| |
pool_cache_cpu_init1(ci, pc); |
| |
|
| |
mutex_enter(&pool_head_lock); |
| |
pc->pc_refcnt--; |
| |
cv_broadcast(&pool_busy); |
| |
} |
| |
mutex_exit(&pool_head_lock); |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_reclaim: |
| |
* |
| |
* Reclaim memory from a pool cache. |
| |
*/ |
| |
bool |
| |
pool_cache_reclaim(pool_cache_t pc) |
| |
{ |
| |
|
| |
return pool_reclaim(&pc->pc_pool); |
| } |
} |
| |
|
| static inline void * |
static inline void * |
| pcg_get(struct pool_cache_group *pcg, paddr_t *pap) |
pcg_get(pcg_t *pcg, paddr_t *pap) |
| { |
{ |
| void *object; |
void *object; |
| u_int idx; |
u_int idx; |
| |
|
| KASSERT(pcg->pcg_avail <= PCG_NOBJECTS); |
KASSERT(pcg->pcg_avail <= PCG_NOBJECTS); |
| KASSERT(pcg->pcg_avail != 0); |
KASSERT(pcg->pcg_avail != 0); |
| idx = --pcg->pcg_avail; |
|
| |
|
| KASSERT(pcg->pcg_objects[idx].pcgo_va != NULL); |
idx = --pcg->pcg_avail; |
| object = pcg->pcg_objects[idx].pcgo_va; |
object = pcg->pcg_objects[idx].pcgo_va; |
| if (pap != NULL) |
if (pap != NULL) |
| *pap = pcg->pcg_objects[idx].pcgo_pa; |
*pap = pcg->pcg_objects[idx].pcgo_pa; |
| |
|
| |
#ifdef DIAGNOSTIC |
| pcg->pcg_objects[idx].pcgo_va = NULL; |
pcg->pcg_objects[idx].pcgo_va = NULL; |
| |
KASSERT(object != NULL); |
| |
#endif |
| |
|
| return (object); |
return (object); |
| } |
} |
| |
|
| static inline void |
static inline void |
| pcg_put(struct pool_cache_group *pcg, void *object, paddr_t pa) |
pcg_put(pcg_t *pcg, void *object, paddr_t pa) |
| { |
{ |
| u_int idx; |
u_int idx; |
| |
|
| KASSERT(pcg->pcg_avail < PCG_NOBJECTS); |
|
| idx = pcg->pcg_avail++; |
idx = pcg->pcg_avail++; |
| |
|
| |
KASSERT(pcg->pcg_avail <= PCG_NOBJECTS); |
| KASSERT(pcg->pcg_objects[idx].pcgo_va == NULL); |
KASSERT(pcg->pcg_objects[idx].pcgo_va == NULL); |
| |
|
| pcg->pcg_objects[idx].pcgo_va = object; |
pcg->pcg_objects[idx].pcgo_va = object; |
| pcg->pcg_objects[idx].pcgo_pa = pa; |
pcg->pcg_objects[idx].pcgo_pa = pa; |
| } |
} |
| |
|
| |
/* |
| |
* pool_cache_destruct_object: |
| |
* |
| |
* Force destruction of an object and its release back into |
| |
* the pool. |
| |
*/ |
| |
void |
| |
pool_cache_destruct_object(pool_cache_t pc, void *object) |
| |
{ |
| |
|
| |
if (pc->pc_dtor != NULL) |
| |
(*pc->pc_dtor)(pc->pc_arg, object); |
| |
pool_put(&pc->pc_pool, object); |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_invalidate_groups: |
| |
* |
| |
* Invalidate a chain of groups and destruct all objects. |
| |
*/ |
| static void |
static void |
| pcg_grouplist_free(struct pool_cache_grouplist *pcgl) |
pool_cache_invalidate_groups(pool_cache_t pc, pcg_t *pcg) |
| { |
{ |
| struct pool_cache_group *pcg; |
void *object; |
| |
pcg_t *next; |
| |
int i; |
| |
|
| |
for (; pcg != NULL; pcg = next) { |
| |
next = pcg->pcg_next; |
| |
|
| |
for (i = 0; i < pcg->pcg_avail; i++) { |
| |
object = pcg->pcg_objects[i].pcgo_va; |
| |
if (pc->pc_dtor != NULL) |
| |
(*pc->pc_dtor)(pc->pc_arg, object); |
| |
pool_put(&pc->pc_pool, object); |
| |
} |
| |
|
| while ((pcg = LIST_FIRST(pcgl)) != NULL) { |
|
| LIST_REMOVE(pcg, pcg_list); |
|
| pool_put(&pcgpool, pcg); |
pool_put(&pcgpool, pcg); |
| } |
} |
| } |
} |
| |
|
| /* |
/* |
| * pool_cache_get{,_paddr}: |
* pool_cache_invalidate: |
| * |
* |
| * Get an object from a pool cache (optionally returning |
* Invalidate a pool cache (destruct and release all of the |
| * the physical address of the object). |
* cached objects). Does not reclaim objects from the pool. |
| */ |
*/ |
| void * |
void |
| pool_cache_get_paddr(struct pool_cache *pc, int flags, paddr_t *pap) |
pool_cache_invalidate(pool_cache_t pc) |
| { |
{ |
| struct pool_cache_group *pcg; |
pcg_t *full, *empty; |
| void *object; |
|
| |
|
| #ifdef LOCKDEBUG |
|
| if (flags & PR_WAITOK) |
|
| ASSERT_SLEEPABLE(NULL, "pool_cache_get(PR_WAITOK)"); |
|
| #endif |
|
| |
|
| mutex_enter(&pc->pc_lock); |
mutex_enter(&pc->pc_lock); |
| |
full = pc->pc_fullgroups; |
| |
empty = pc->pc_emptygroups; |
| |
pc->pc_fullgroups = NULL; |
| |
pc->pc_emptygroups = NULL; |
| |
pc->pc_nfull = 0; |
| |
pc->pc_nempty = 0; |
| |
mutex_exit(&pc->pc_lock); |
| |
|
| pcg = LIST_FIRST(&pc->pc_partgroups); |
pool_cache_invalidate_groups(pc, full); |
| if (pcg == NULL) { |
pool_cache_invalidate_groups(pc, empty); |
| pcg = LIST_FIRST(&pc->pc_fullgroups); |
} |
| if (pcg != NULL) { |
|
| LIST_REMOVE(pcg, pcg_list); |
|
| LIST_INSERT_HEAD(&pc->pc_partgroups, pcg, pcg_list); |
|
| } |
|
| } |
|
| if (pcg == NULL) { |
|
| |
|
| /* |
void |
| * No groups with any available objects. Allocate |
pool_cache_set_drain_hook(pool_cache_t pc, void (*fn)(void *, int), void *arg) |
| * a new object, construct it, and return it to |
{ |
| * the caller. We will allocate a group, if necessary, |
|
| * when the object is freed back to the cache. |
|
| */ |
|
| pc->pc_misses++; |
|
| mutex_exit(&pc->pc_lock); |
|
| object = pool_get(pc->pc_pool, flags); |
|
| if (object != NULL && pc->pc_ctor != NULL) { |
|
| if ((*pc->pc_ctor)(pc->pc_arg, object, flags) != 0) { |
|
| pool_put(pc->pc_pool, object); |
|
| return (NULL); |
|
| } |
|
| } |
|
| KASSERT((((vaddr_t)object + pc->pc_pool->pr_itemoffset) & |
|
| (pc->pc_pool->pr_align - 1)) == 0); |
|
| if (object != NULL && pap != NULL) { |
|
| #ifdef POOL_VTOPHYS |
|
| *pap = POOL_VTOPHYS(object); |
|
| #else |
|
| *pap = POOL_PADDR_INVALID; |
|
| #endif |
|
| } |
|
| |
|
| FREECHECK_OUT(&pc->pc_freecheck, object); |
pool_set_drain_hook(&pc->pc_pool, fn, arg); |
| return (object); |
} |
| } |
|
| |
|
| pc->pc_hits++; |
void |
| pc->pc_nitems--; |
pool_cache_setlowat(pool_cache_t pc, int n) |
| object = pcg_get(pcg, pap); |
{ |
| |
|
| if (pcg->pcg_avail == 0) { |
pool_setlowat(&pc->pc_pool, n); |
| LIST_REMOVE(pcg, pcg_list); |
} |
| LIST_INSERT_HEAD(&pc->pc_emptygroups, pcg, pcg_list); |
|
| } |
|
| mutex_exit(&pc->pc_lock); |
|
| |
|
| KASSERT((((vaddr_t)object + pc->pc_pool->pr_itemoffset) & |
void |
| (pc->pc_pool->pr_align - 1)) == 0); |
pool_cache_sethiwat(pool_cache_t pc, int n) |
| FREECHECK_OUT(&pc->pc_freecheck, object); |
{ |
| return (object); |
|
| |
pool_sethiwat(&pc->pc_pool, n); |
| } |
} |
| |
|
| /* |
|
| * pool_cache_put{,_paddr}: |
|
| * |
|
| * Put an object back to the pool cache (optionally caching the |
|
| * physical address of the object). |
|
| */ |
|
| void |
void |
| pool_cache_put_paddr(struct pool_cache *pc, void *object, paddr_t pa) |
pool_cache_sethardlimit(pool_cache_t pc, int n, const char *warnmess, int ratecap) |
| { |
{ |
| struct pool_cache_group *pcg; |
|
| |
|
| FREECHECK_IN(&pc->pc_freecheck, object); |
pool_sethardlimit(&pc->pc_pool, n, warnmess, ratecap); |
| |
} |
| |
|
| |
static inline pool_cache_cpu_t * |
| |
pool_cache_cpu_enter(pool_cache_t pc, int *s) |
| |
{ |
| |
pool_cache_cpu_t *cc; |
| |
struct cpu_info *ci; |
| |
|
| if (__predict_false((pc->pc_pool->pr_flags & PR_WANTED) != 0)) { |
/* |
| goto destruct; |
* Prevent other users of the cache from accessing our |
| |
* CPU-local data. To avoid touching shared state, we |
| |
* pull the neccessary information from CPU local data. |
| |
*/ |
| |
ci = curcpu(); |
| |
cc = pc->pc_cpus[ci->ci_data.cpu_index]; |
| |
if (cc->cc_ipl == IPL_NONE) { |
| |
crit_enter(); |
| |
} else { |
| |
*s = splraiseipl(cc->cc_iplcookie); |
| } |
} |
| |
|
| mutex_enter(&pc->pc_lock); |
/* Moved to another CPU before disabling preemption? */ |
| |
if (__predict_false(ci != curcpu())) { |
| |
ci = curcpu(); |
| |
cc = pc->pc_cpus[ci->ci_data.cpu_index]; |
| |
} |
| |
|
| pcg = LIST_FIRST(&pc->pc_partgroups); |
#ifdef DIAGNOSTIC |
| if (pcg == NULL) { |
KASSERT(cc->cc_busy == NULL); |
| pcg = LIST_FIRST(&pc->pc_emptygroups); |
KASSERT(cc->cc_cpu == ci); |
| if (pcg != NULL) { |
KASSERT(((uintptr_t)cc & (CACHE_LINE_SIZE - 1)) == 0); |
| LIST_REMOVE(pcg, pcg_list); |
cc->cc_busy = curlwp; |
| LIST_INSERT_HEAD(&pc->pc_partgroups, pcg, pcg_list); |
#endif |
| |
|
| |
return cc; |
| |
} |
| |
|
| |
static inline void |
| |
pool_cache_cpu_exit(pool_cache_cpu_t *cc, int *s) |
| |
{ |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
KASSERT(cc->cc_busy == curlwp); |
| |
cc->cc_busy = NULL; |
| |
#endif |
| |
|
| |
/* No longer need exclusive access to the per-CPU data. */ |
| |
if (cc->cc_ipl == IPL_NONE) { |
| |
crit_exit(); |
| |
} else { |
| |
splx(*s); |
| |
} |
| |
} |
| |
|
| |
#if __GNUC_PREREQ__(3, 0) |
| |
__attribute ((noinline)) |
| |
#endif |
| |
pool_cache_cpu_t * |
| |
pool_cache_get_slow(pool_cache_cpu_t *cc, int *s, void **objectp, |
| |
paddr_t *pap, int flags) |
| |
{ |
| |
pcg_t *pcg, *cur; |
| |
uint64_t ncsw; |
| |
pool_cache_t pc; |
| |
void *object; |
| |
|
| |
pc = cc->cc_cache; |
| |
cc->cc_misses++; |
| |
|
| |
/* |
| |
* Nothing was available locally. Try and grab a group |
| |
* from the cache. |
| |
*/ |
| |
if (!mutex_tryenter(&pc->pc_lock)) { |
| |
ncsw = curlwp->l_ncsw; |
| |
mutex_enter(&pc->pc_lock); |
| |
pc->pc_contended++; |
| |
|
| |
/* |
| |
* If we context switched while locking, then |
| |
* our view of the per-CPU data is invalid: |
| |
* retry. |
| |
*/ |
| |
if (curlwp->l_ncsw != ncsw) { |
| |
mutex_exit(&pc->pc_lock); |
| |
pool_cache_cpu_exit(cc, s); |
| |
return pool_cache_cpu_enter(pc, s); |
| } |
} |
| } |
} |
| if (pcg == NULL) { |
|
| |
|
| |
if ((pcg = pc->pc_fullgroups) != NULL) { |
| /* |
/* |
| * No empty groups to free the object to. Attempt to |
* If there's a full group, release our empty |
| * allocate one. |
* group back to the cache. Install the full |
| |
* group as cc_current and return. |
| */ |
*/ |
| |
if ((cur = cc->cc_current) != NULL) { |
| |
KASSERT(cur->pcg_avail == 0); |
| |
cur->pcg_next = pc->pc_emptygroups; |
| |
pc->pc_emptygroups = cur; |
| |
pc->pc_nempty++; |
| |
} |
| |
KASSERT(pcg->pcg_avail == PCG_NOBJECTS); |
| |
cc->cc_current = pcg; |
| |
pc->pc_fullgroups = pcg->pcg_next; |
| |
pc->pc_hits++; |
| |
pc->pc_nfull--; |
| mutex_exit(&pc->pc_lock); |
mutex_exit(&pc->pc_lock); |
| pcg = pool_get(&pcgpool, PR_NOWAIT); |
return cc; |
| if (pcg == NULL) { |
} |
| destruct: |
|
| |
|
| /* |
/* |
| * Unable to allocate a cache group; destruct the object |
* Nothing available locally or in cache. Take the slow |
| * and free it back to the pool. |
* path: fetch a new object from the pool and construct |
| */ |
* it. |
| pool_cache_destruct_object(pc, object); |
*/ |
| return; |
pc->pc_misses++; |
| |
mutex_exit(&pc->pc_lock); |
| |
pool_cache_cpu_exit(cc, s); |
| |
|
| |
object = pool_get(&pc->pc_pool, flags); |
| |
*objectp = object; |
| |
if (object == NULL) |
| |
return NULL; |
| |
|
| |
if (pc->pc_ctor != NULL) { |
| |
if ((*pc->pc_ctor)(pc->pc_arg, object, flags) != 0) { |
| |
pool_put(&pc->pc_pool, object); |
| |
*objectp = NULL; |
| |
return NULL; |
| } |
} |
| memset(pcg, 0, sizeof(*pcg)); |
|
| mutex_enter(&pc->pc_lock); |
|
| pc->pc_ngroups++; |
|
| LIST_INSERT_HEAD(&pc->pc_partgroups, pcg, pcg_list); |
|
| } |
} |
| |
|
| pc->pc_nitems++; |
KASSERT((((vaddr_t)object + pc->pc_pool.pr_itemoffset) & |
| pcg_put(pcg, object, pa); |
(pc->pc_pool.pr_align - 1)) == 0); |
| |
|
| if (pcg->pcg_avail == PCG_NOBJECTS) { |
if (pap != NULL) { |
| LIST_REMOVE(pcg, pcg_list); |
#ifdef POOL_VTOPHYS |
| LIST_INSERT_HEAD(&pc->pc_fullgroups, pcg, pcg_list); |
*pap = POOL_VTOPHYS(object); |
| |
#else |
| |
*pap = POOL_PADDR_INVALID; |
| |
#endif |
| } |
} |
| mutex_exit(&pc->pc_lock); |
|
| } |
|
| |
|
| /* |
|
| * pool_cache_destruct_object: |
|
| * |
|
| * Force destruction of an object and its release back into |
|
| * the pool. |
|
| */ |
|
| void |
|
| pool_cache_destruct_object(struct pool_cache *pc, void *object) |
|
| { |
|
| |
|
| if (pc->pc_dtor != NULL) |
FREECHECK_OUT(&pc->pc_freecheck, object); |
| (*pc->pc_dtor)(pc->pc_arg, object); |
return NULL; |
| pool_put(pc->pc_pool, object); |
|
| } |
} |
| |
|
| /* |
/* |
| * pool_do_cache_invalidate_grouplist: |
* pool_cache_get{,_paddr}: |
| * |
* |
| * Invalidate a single grouplist and destruct all objects. |
* Get an object from a pool cache (optionally returning |
| * XXX This is too expensive. We should swap the list then |
* the physical address of the object). |
| * unlock. |
|
| */ |
*/ |
| static void |
void * |
| pool_do_cache_invalidate_grouplist(struct pool_cache_grouplist *pcgsl, |
pool_cache_get_paddr(pool_cache_t pc, int flags, paddr_t *pap) |
| struct pool_cache *pc, struct pool_pagelist *pq, |
|
| struct pool_cache_grouplist *pcgdl) |
|
| { |
{ |
| struct pool_cache_group *pcg; |
pool_cache_cpu_t *cc; |
| |
pcg_t *pcg; |
| void *object; |
void *object; |
| |
int s; |
| |
|
| KASSERT(mutex_owned(&pc->pc_lock)); |
#ifdef LOCKDEBUG |
| KASSERT(mutex_owned(&pc->pc_pool->pr_lock)); |
if (flags & PR_WAITOK) |
| |
ASSERT_SLEEPABLE(NULL, "pool_cache_get(PR_WAITOK)"); |
| |
#endif |
| |
|
| while ((pcg = LIST_FIRST(pcgsl)) != NULL) { |
cc = pool_cache_cpu_enter(pc, &s); |
| pc->pc_ngroups--; |
do { |
| LIST_REMOVE(pcg, pcg_list); |
/* Try and allocate an object from the current group. */ |
| LIST_INSERT_HEAD(pcgdl, pcg, pcg_list); |
pcg = cc->cc_current; |
| pc->pc_nitems -= pcg->pcg_avail; |
if (pcg != NULL && pcg->pcg_avail > 0) { |
| mutex_exit(&pc->pc_pool->pr_lock); |
object = pcg_get(pcg, pap); |
| mutex_exit(&pc->pc_lock); |
cc->cc_hits++; |
| |
pool_cache_cpu_exit(cc, &s); |
| |
FREECHECK_OUT(&pc->pc_freecheck, object); |
| |
return object; |
| |
} |
| |
|
| while (pcg->pcg_avail != 0) { |
/* |
| object = pcg_get(pcg, NULL); |
* That failed. If the previous group isn't empty, swap |
| if (pc->pc_dtor != NULL) |
* it with the current group and allocate from there. |
| (*pc->pc_dtor)(pc->pc_arg, object); |
*/ |
| mutex_enter(&pc->pc_pool->pr_lock); |
pcg = cc->cc_previous; |
| pool_do_put(pc->pc_pool, object, pq); |
if (pcg != NULL && pcg->pcg_avail > 0) { |
| mutex_exit(&pc->pc_pool->pr_lock); |
cc->cc_previous = cc->cc_current; |
| |
cc->cc_current = pcg; |
| |
continue; |
| } |
} |
| |
|
| mutex_enter(&pc->pc_lock); |
/* |
| mutex_enter(&pc->pc_pool->pr_lock); |
* Can't allocate from either group: try the slow path. |
| } |
* If get_slow() allocated an object for us, or if |
| |
* no more objects are available, it will return NULL. |
| |
* Otherwise, we need to retry. |
| |
*/ |
| |
cc = pool_cache_get_slow(cc, &s, &object, pap, flags); |
| |
} while (cc != NULL); |
| |
|
| |
return object; |
| } |
} |
| |
|
| static void |
#if __GNUC_PREREQ__(3, 0) |
| pool_do_cache_invalidate(struct pool_cache *pc, struct pool_pagelist *pq, |
__attribute ((noinline)) |
| struct pool_cache_grouplist *pcgl) |
#endif |
| |
pool_cache_cpu_t * |
| |
pool_cache_put_slow(pool_cache_cpu_t *cc, int *s, void *object, paddr_t pa) |
| { |
{ |
| |
pcg_t *pcg, *cur; |
| |
uint64_t ncsw; |
| |
pool_cache_t pc; |
| |
|
| KASSERT(mutex_owned(&pc->pc_lock)); |
pc = cc->cc_cache; |
| KASSERT(mutex_owned(&pc->pc_pool->pr_lock)); |
cc->cc_misses++; |
| |
|
| pool_do_cache_invalidate_grouplist(&pc->pc_fullgroups, pc, pq, pcgl); |
/* |
| pool_do_cache_invalidate_grouplist(&pc->pc_partgroups, pc, pq, pcgl); |
* No free slots locally. Try to grab an empty, unused |
| |
* group from the cache. |
| KASSERT(LIST_EMPTY(&pc->pc_partgroups)); |
*/ |
| KASSERT(LIST_EMPTY(&pc->pc_fullgroups)); |
if (!mutex_tryenter(&pc->pc_lock)) { |
| KASSERT(pc->pc_nitems == 0); |
ncsw = curlwp->l_ncsw; |
| } |
mutex_enter(&pc->pc_lock); |
| |
pc->pc_contended++; |
| |
|
| /* |
/* |
| * pool_cache_invalidate: |
* If we context switched while locking, then |
| * |
* our view of the per-CPU data is invalid: |
| * Invalidate a pool cache (destruct and release all of the |
* retry. |
| * cached objects). |
*/ |
| */ |
if (curlwp->l_ncsw != ncsw) { |
| void |
mutex_exit(&pc->pc_lock); |
| pool_cache_invalidate(struct pool_cache *pc) |
pool_cache_cpu_exit(cc, s); |
| { |
return pool_cache_cpu_enter(pc, s); |
| struct pool_pagelist pq; |
} |
| struct pool_cache_grouplist pcgl; |
} |
| |
|
| LIST_INIT(&pq); |
if ((pcg = pc->pc_emptygroups) != NULL) { |
| LIST_INIT(&pcgl); |
/* |
| |
* If there's a empty group, release our full |
| |
* group back to the cache. Install the empty |
| |
* group as cc_current and return. |
| |
*/ |
| |
if ((cur = cc->cc_current) != NULL) { |
| |
KASSERT(cur->pcg_avail == PCG_NOBJECTS); |
| |
cur->pcg_next = pc->pc_fullgroups; |
| |
pc->pc_fullgroups = cur; |
| |
pc->pc_nfull++; |
| |
} |
| |
KASSERT(pcg->pcg_avail == 0); |
| |
cc->cc_current = pcg; |
| |
pc->pc_emptygroups = pcg->pcg_next; |
| |
pc->pc_hits++; |
| |
pc->pc_nempty--; |
| |
mutex_exit(&pc->pc_lock); |
| |
return cc; |
| |
} |
| |
|
| mutex_enter(&pc->pc_lock); |
/* |
| mutex_enter(&pc->pc_pool->pr_lock); |
* Nothing available locally or in cache. Take the |
| |
* slow path and try to allocate a new group that we |
| |
* can release to. |
| |
*/ |
| |
pc->pc_misses++; |
| |
mutex_exit(&pc->pc_lock); |
| |
pool_cache_cpu_exit(cc, s); |
| |
|
| pool_do_cache_invalidate(pc, &pq, &pcgl); |
/* |
| |
* If we can't allocate a new group, just throw the |
| |
* object away. |
| |
*/ |
| |
#ifdef XXXAD /* Disable the cache layer for now. */ |
| |
pcg = pool_get(&pcgpool, PR_NOWAIT); |
| |
#else |
| |
pcg = NULL; |
| |
#endif |
| |
if (pcg == NULL) { |
| |
pool_cache_destruct_object(pc, object); |
| |
return NULL; |
| |
} |
| |
#ifdef DIAGNOSTIC |
| |
memset(pcg, 0, sizeof(*pcg)); |
| |
#else |
| |
pcg->pcg_avail = 0; |
| |
#endif |
| |
|
| mutex_exit(&pc->pc_pool->pr_lock); |
/* |
| |
* Add the empty group to the cache and try again. |
| |
*/ |
| |
mutex_enter(&pc->pc_lock); |
| |
pcg->pcg_next = pc->pc_emptygroups; |
| |
pc->pc_emptygroups = pcg; |
| |
pc->pc_nempty++; |
| mutex_exit(&pc->pc_lock); |
mutex_exit(&pc->pc_lock); |
| |
|
| pr_pagelist_free(pc->pc_pool, &pq); |
return pool_cache_cpu_enter(pc, s); |
| pcg_grouplist_free(&pcgl); |
} |
| } |
|
| |
|
| /* |
/* |
| * pool_cache_reclaim: |
* pool_cache_put{,_paddr}: |
| * |
* |
| * Reclaim a pool cache for pool_reclaim(). |
* Put an object back to the pool cache (optionally caching the |
| |
* physical address of the object). |
| */ |
*/ |
| static void |
void |
| pool_cache_reclaim(struct pool_cache *pc, struct pool_pagelist *pq, |
pool_cache_put_paddr(pool_cache_t pc, void *object, paddr_t pa) |
| struct pool_cache_grouplist *pcgl) |
|
| { |
{ |
| |
pool_cache_cpu_t *cc; |
| |
pcg_t *pcg; |
| |
int s; |
| |
|
| /* |
FREECHECK_IN(&pc->pc_freecheck, object); |
| * We're locking in the wrong order (normally pool_cache -> pool, |
|
| * but the pool is already locked when we get here), so we have |
|
| * to use trylock. If we can't lock the pool_cache, it's not really |
|
| * a big deal here. |
|
| */ |
|
| if (mutex_tryenter(&pc->pc_lock) == 0) |
|
| return; |
|
| |
|
| pool_do_cache_invalidate(pc, pq, pcgl); |
cc = pool_cache_cpu_enter(pc, &s); |
| |
do { |
| |
/* If the current group isn't full, release it there. */ |
| |
pcg = cc->cc_current; |
| |
if (pcg != NULL && pcg->pcg_avail < PCG_NOBJECTS) { |
| |
pcg_put(pcg, object, pa); |
| |
cc->cc_hits++; |
| |
pool_cache_cpu_exit(cc, &s); |
| |
return; |
| |
} |
| |
|
| mutex_exit(&pc->pc_lock); |
/* |
| |
* That failed. If the previous group is empty, swap |
| |
* it with the current group and try again. |
| |
*/ |
| |
pcg = cc->cc_previous; |
| |
if (pcg != NULL && pcg->pcg_avail == 0) { |
| |
cc->cc_previous = cc->cc_current; |
| |
cc->cc_current = pcg; |
| |
continue; |
| |
} |
| |
|
| |
/* |
| |
* Can't free to either group: try the slow path. |
| |
* If put_slow() releases the object for us, it |
| |
* will return NULL. Otherwise we need to retry. |
| |
*/ |
| |
cc = pool_cache_put_slow(cc, &s, object, pa); |
| |
} while (cc != NULL); |
| } |
} |
| |
|
| /* |
/* |