version 1.152, 2008/03/02 12:19:58 |
version 1.177, 2009/10/20 17:24:22 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
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/*- |
/*- |
* Copyright (c) 1997, 1999, 2000, 2002, 2007 The NetBSD Foundation, Inc. |
* Copyright (c) 1997, 1999, 2000, 2002, 2007, 2008 The NetBSD Foundation, Inc. |
* All rights reserved. |
* All rights reserved. |
* |
* |
* This code is derived from software contributed to The NetBSD Foundation |
* This code is derived from software contributed to The NetBSD Foundation |
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* 2. Redistributions in binary form must reproduce the above copyright |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by the NetBSD |
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* Foundation, Inc. and its contributors. |
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* 4. Neither the name of The NetBSD Foundation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
* |
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
Line 76 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 69 __KERNEL_RCSID(0, "$NetBSD$"); |
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*/ |
*/ |
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/* List of all pools */ |
/* List of all pools */ |
TAILQ_HEAD(,pool) pool_head = TAILQ_HEAD_INITIALIZER(pool_head); |
static TAILQ_HEAD(, pool) pool_head = TAILQ_HEAD_INITIALIZER(pool_head); |
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/* Private pool for page header structures */ |
/* Private pool for page header structures */ |
#define PHPOOL_MAX 8 |
#define PHPOOL_MAX 8 |
Line 186 static struct pool cache_cpu_pool; |
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Line 179 static struct pool cache_cpu_pool; |
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TAILQ_HEAD(,pool_cache) pool_cache_head = |
TAILQ_HEAD(,pool_cache) pool_cache_head = |
TAILQ_HEAD_INITIALIZER(pool_cache_head); |
TAILQ_HEAD_INITIALIZER(pool_cache_head); |
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int pool_cache_disable; |
int pool_cache_disable; /* global disable for caching */ |
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static const pcg_t pcg_dummy; /* zero sized: always empty, yet always full */ |
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static bool pool_cache_put_slow(pool_cache_cpu_t *, int, |
static pool_cache_cpu_t *pool_cache_put_slow(pool_cache_cpu_t *, int *, |
void *); |
void *, paddr_t); |
static bool pool_cache_get_slow(pool_cache_cpu_t *, int, |
static pool_cache_cpu_t *pool_cache_get_slow(pool_cache_cpu_t *, int *, |
void **, paddr_t *, int); |
void **, paddr_t *, int); |
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static void pool_cache_cpu_init1(struct cpu_info *, pool_cache_t); |
static void pool_cache_cpu_init1(struct cpu_info *, pool_cache_t); |
static void pool_cache_invalidate_groups(pool_cache_t, pcg_t *); |
static void pool_cache_invalidate_groups(pool_cache_t, pcg_t *); |
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static void pool_cache_invalidate_cpu(pool_cache_t, u_int); |
static void pool_cache_xcall(pool_cache_t); |
static void pool_cache_xcall(pool_cache_t); |
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static int pool_catchup(struct pool *); |
static int pool_catchup(struct pool *); |
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pool_subsystem_init(void) |
pool_subsystem_init(void) |
{ |
{ |
struct pool_allocator *pa; |
struct pool_allocator *pa; |
__link_set_decl(pools, struct link_pool_init); |
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struct link_pool_init * const *pi; |
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mutex_init(&pool_head_lock, MUTEX_DEFAULT, IPL_NONE); |
mutex_init(&pool_head_lock, MUTEX_DEFAULT, IPL_NONE); |
cv_init(&pool_busy, "poolbusy"); |
cv_init(&pool_busy, "poolbusy"); |
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__link_set_foreach(pi, pools) |
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pool_init((*pi)->pp, (*pi)->size, (*pi)->align, |
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(*pi)->align_offset, (*pi)->flags, (*pi)->wchan, |
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(*pi)->palloc, (*pi)->ipl); |
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while ((pa = SLIST_FIRST(&pa_deferinitq)) != NULL) { |
while ((pa = SLIST_FIRST(&pa_deferinitq)) != NULL) { |
KASSERT(pa->pa_backingmapptr != NULL); |
KASSERT(pa->pa_backingmapptr != NULL); |
KASSERT(*pa->pa_backingmapptr != NULL); |
KASSERT(*pa->pa_backingmapptr != NULL); |
Line 612 pool_subsystem_init(void) |
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Line 599 pool_subsystem_init(void) |
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pa_reclaim_register(pa); |
pa_reclaim_register(pa); |
} |
} |
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pool_init(&cache_pool, sizeof(struct pool_cache), CACHE_LINE_SIZE, |
pool_init(&cache_pool, sizeof(struct pool_cache), coherency_unit, |
0, 0, "pcache", &pool_allocator_nointr, IPL_NONE); |
0, 0, "pcache", &pool_allocator_nointr, IPL_NONE); |
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pool_init(&cache_cpu_pool, sizeof(pool_cache_cpu_t), CACHE_LINE_SIZE, |
pool_init(&cache_cpu_pool, sizeof(pool_cache_cpu_t), coherency_unit, |
0, 0, "pcachecpu", &pool_allocator_nointr, IPL_NONE); |
0, 0, "pcachecpu", &pool_allocator_nointr, IPL_NONE); |
} |
} |
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Line 814 pool_init(struct pool *pp, size_t size, |
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Line 801 pool_init(struct pool *pp, size_t size, |
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pp->pr_entered_file = NULL; |
pp->pr_entered_file = NULL; |
pp->pr_entered_line = 0; |
pp->pr_entered_line = 0; |
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/* |
mutex_init(&pp->pr_lock, MUTEX_DEFAULT, ipl); |
* XXXAD hack to prevent IP input processing from blocking. |
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*/ |
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if (ipl == IPL_SOFTNET) { |
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mutex_init(&pp->pr_lock, MUTEX_DEFAULT, IPL_VM); |
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} else { |
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mutex_init(&pp->pr_lock, MUTEX_DEFAULT, ipl); |
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} |
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cv_init(&pp->pr_cv, wchan); |
cv_init(&pp->pr_cv, wchan); |
pp->pr_ipl = ipl; |
pp->pr_ipl = ipl; |
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Line 855 pool_init(struct pool *pp, size_t size, |
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Line 835 pool_init(struct pool *pp, size_t size, |
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size = sizeof(pcg_t) + |
size = sizeof(pcg_t) + |
(PCG_NOBJECTS_NORMAL - 1) * sizeof(pcgpair_t); |
(PCG_NOBJECTS_NORMAL - 1) * sizeof(pcgpair_t); |
pool_init(&pcg_normal_pool, size, CACHE_LINE_SIZE, 0, 0, |
pool_init(&pcg_normal_pool, size, coherency_unit, 0, 0, |
"pcgnormal", &pool_allocator_meta, IPL_VM); |
"pcgnormal", &pool_allocator_meta, IPL_VM); |
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size = sizeof(pcg_t) + |
size = sizeof(pcg_t) + |
(PCG_NOBJECTS_LARGE - 1) * sizeof(pcgpair_t); |
(PCG_NOBJECTS_LARGE - 1) * sizeof(pcgpair_t); |
pool_init(&pcg_large_pool, size, CACHE_LINE_SIZE, 0, 0, |
pool_init(&pcg_large_pool, size, coherency_unit, 0, 0, |
"pcglarge", &pool_allocator_meta, IPL_VM); |
"pcglarge", &pool_allocator_meta, IPL_VM); |
} |
} |
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Line 878 pool_init(struct pool *pp, size_t size, |
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Line 858 pool_init(struct pool *pp, size_t size, |
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if (__predict_true(!cold)) |
if (__predict_true(!cold)) |
mutex_exit(&pool_head_lock); |
mutex_exit(&pool_head_lock); |
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/* Insert this into the list of pools using this allocator. */ |
/* Insert this into the list of pools using this allocator. */ |
if (__predict_true(!cold)) |
if (__predict_true(!cold)) |
mutex_enter(&palloc->pa_lock); |
mutex_enter(&palloc->pa_lock); |
TAILQ_INSERT_TAIL(&palloc->pa_list, pp, pr_alloc_list); |
TAILQ_INSERT_TAIL(&palloc->pa_list, pp, pr_alloc_list); |
Line 995 pool_get(struct pool *pp, int flags) |
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Line 975 pool_get(struct pool *pp, int flags) |
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#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
#ifdef LOCKDEBUG |
#ifdef LOCKDEBUG |
if (flags & PR_WAITOK) |
if (flags & PR_WAITOK) { |
ASSERT_SLEEPABLE(NULL, "pool_get(PR_WAITOK)"); |
ASSERT_SLEEPABLE(); |
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} |
#endif |
#endif |
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mutex_enter(&pp->pr_lock); |
mutex_enter(&pp->pr_lock); |
Line 1266 pool_do_put(struct pool *pp, void *v, st |
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Line 1247 pool_do_put(struct pool *pp, void *v, st |
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if (pp->pr_flags & PR_WANTED) { |
if (pp->pr_flags & PR_WANTED) { |
pp->pr_flags &= ~PR_WANTED; |
pp->pr_flags &= ~PR_WANTED; |
if (ph->ph_nmissing == 0) |
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pp->pr_nidle++; |
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cv_broadcast(&pp->pr_cv); |
cv_broadcast(&pp->pr_cv); |
return; |
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} |
} |
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/* |
/* |
Line 1543 pool_update_curpage(struct pool *pp) |
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Line 1521 pool_update_curpage(struct pool *pp) |
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if (pp->pr_curpage == NULL) { |
if (pp->pr_curpage == NULL) { |
pp->pr_curpage = LIST_FIRST(&pp->pr_emptypages); |
pp->pr_curpage = LIST_FIRST(&pp->pr_emptypages); |
} |
} |
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KASSERT((pp->pr_curpage == NULL && pp->pr_nitems == 0) || |
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(pp->pr_curpage != NULL && pp->pr_nitems > 0)); |
} |
} |
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void |
void |
Line 1628 pool_reclaim(struct pool *pp) |
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Line 1608 pool_reclaim(struct pool *pp) |
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} |
} |
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/* |
/* |
* XXXSMP Because mutexes at IPL_SOFTXXX are still spinlocks, |
* XXXSMP Because we do not want to cause non-MPSAFE code |
* and we are called from the pagedaemon without kernel_lock. |
* to block. |
* Does not apply to IPL_SOFTBIO. |
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*/ |
*/ |
if (pp->pr_ipl == IPL_SOFTNET || pp->pr_ipl == IPL_SOFTCLOCK || |
if (pp->pr_ipl == IPL_SOFTNET || pp->pr_ipl == IPL_SOFTCLOCK || |
pp->pr_ipl == IPL_SOFTSERIAL) { |
pp->pr_ipl == IPL_SOFTSERIAL) { |
Line 2073 pool_cache_bootstrap(pool_cache_t pc, si |
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Line 2052 pool_cache_bootstrap(pool_cache_t pc, si |
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if (palloc == NULL && ipl == IPL_NONE) |
if (palloc == NULL && ipl == IPL_NONE) |
palloc = &pool_allocator_nointr; |
palloc = &pool_allocator_nointr; |
pool_init(pp, size, align, align_offset, flags, wchan, palloc, ipl); |
pool_init(pp, size, align, align_offset, flags, wchan, palloc, ipl); |
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mutex_init(&pc->pc_lock, MUTEX_DEFAULT, ipl); |
/* |
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* XXXAD hack to prevent IP input processing from blocking. |
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*/ |
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if (ipl == IPL_SOFTNET) { |
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mutex_init(&pc->pc_lock, MUTEX_DEFAULT, IPL_VM); |
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} else { |
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mutex_init(&pc->pc_lock, MUTEX_DEFAULT, ipl); |
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} |
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if (ctor == NULL) { |
if (ctor == NULL) { |
ctor = (int (*)(void *, void *, int))nullop; |
ctor = (int (*)(void *, void *, int))nullop; |
Line 2107 pool_cache_bootstrap(pool_cache_t pc, si |
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Line 2078 pool_cache_bootstrap(pool_cache_t pc, si |
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if ((flags & PR_LARGECACHE) != 0) { |
if ((flags & PR_LARGECACHE) != 0) { |
pc->pc_pcgsize = PCG_NOBJECTS_LARGE; |
pc->pc_pcgsize = PCG_NOBJECTS_LARGE; |
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pc->pc_pcgpool = &pcg_large_pool; |
} else { |
} else { |
pc->pc_pcgsize = PCG_NOBJECTS_NORMAL; |
pc->pc_pcgsize = PCG_NOBJECTS_NORMAL; |
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pc->pc_pcgpool = &pcg_normal_pool; |
} |
} |
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/* Allocate per-CPU caches. */ |
/* Allocate per-CPU caches. */ |
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pool_cache_destroy(pool_cache_t 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; |
u_int i; |
pcg_t *pcg; |
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int i; |
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/* Remove it from the global list. */ |
/* Remove it from the global list. */ |
mutex_enter(&pool_head_lock); |
mutex_enter(&pool_head_lock); |
Line 2170 pool_cache_destroy(pool_cache_t pc) |
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Line 2141 pool_cache_destroy(pool_cache_t pc) |
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mutex_exit(&pp->pr_lock); |
mutex_exit(&pp->pr_lock); |
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/* Destroy per-CPU data */ |
/* Destroy per-CPU data */ |
for (i = 0; i < MAXCPUS; i++) { |
for (i = 0; i < MAXCPUS; i++) |
if ((cc = pc->pc_cpus[i]) == NULL) |
pool_cache_invalidate_cpu(pc, i); |
continue; |
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if ((pcg = cc->cc_current) != NULL) { |
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pcg->pcg_next = NULL; |
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pool_cache_invalidate_groups(pc, pcg); |
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} |
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if ((pcg = cc->cc_previous) != NULL) { |
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pcg->pcg_next = NULL; |
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pool_cache_invalidate_groups(pc, pcg); |
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} |
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if (cc != &pc->pc_cpu0) |
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pool_put(&cache_cpu_pool, cc); |
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} |
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/* Finally, destroy it. */ |
/* Finally, destroy it. */ |
mutex_destroy(&pc->pc_lock); |
mutex_destroy(&pc->pc_lock); |
Line 2205 pool_cache_cpu_init1(struct cpu_info *ci |
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Line 2164 pool_cache_cpu_init1(struct cpu_info *ci |
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index = ci->ci_index; |
index = ci->ci_index; |
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KASSERT(index < MAXCPUS); |
KASSERT(index < MAXCPUS); |
KASSERT(((uintptr_t)pc->pc_cpus & (CACHE_LINE_SIZE - 1)) == 0); |
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if ((cc = pc->pc_cpus[index]) != NULL) { |
if ((cc = pc->pc_cpus[index]) != NULL) { |
KASSERT(cc->cc_cpuindex == index); |
KASSERT(cc->cc_cpuindex == index); |
Line 2232 pool_cache_cpu_init1(struct cpu_info *ci |
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Line 2190 pool_cache_cpu_init1(struct cpu_info *ci |
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cc->cc_cpuindex = index; |
cc->cc_cpuindex = index; |
cc->cc_hits = 0; |
cc->cc_hits = 0; |
cc->cc_misses = 0; |
cc->cc_misses = 0; |
cc->cc_current = NULL; |
cc->cc_current = __UNCONST(&pcg_dummy); |
cc->cc_previous = NULL; |
cc->cc_previous = __UNCONST(&pcg_dummy); |
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pc->pc_cpus[index] = cc; |
pc->pc_cpus[index] = cc; |
} |
} |
Line 2331 pool_cache_invalidate_groups(pool_cache_ |
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Line 2289 pool_cache_invalidate_groups(pool_cache_ |
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* |
* |
* Invalidate a pool cache (destruct and release all of the |
* Invalidate a pool cache (destruct and release all of the |
* cached objects). Does not reclaim objects from the pool. |
* cached objects). Does not reclaim objects from the pool. |
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* |
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* Note: For pool caches that provide constructed objects, there |
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* is an assumption that another level of synchronization is occurring |
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* between the input to the constructor and the cache invalidation. |
*/ |
*/ |
void |
void |
pool_cache_invalidate(pool_cache_t pc) |
pool_cache_invalidate(pool_cache_t pc) |
{ |
{ |
pcg_t *full, *empty, *part; |
pcg_t *full, *empty, *part; |
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uint64_t where; |
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if (ncpu < 2 || !mp_online) { |
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/* |
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* We might be called early enough in the boot process |
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* for the CPU data structures to not be fully initialized. |
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* In this case, simply gather the local CPU's cache now |
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* since it will be the only one running. |
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*/ |
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pool_cache_xcall(pc); |
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} else { |
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/* |
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* Gather all of the CPU-specific caches into the |
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* global cache. |
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*/ |
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where = xc_broadcast(0, (xcfunc_t)pool_cache_xcall, pc, NULL); |
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xc_wait(where); |
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} |
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mutex_enter(&pc->pc_lock); |
mutex_enter(&pc->pc_lock); |
full = pc->pc_fullgroups; |
full = pc->pc_fullgroups; |
Line 2354 pool_cache_invalidate(pool_cache_t pc) |
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Line 2334 pool_cache_invalidate(pool_cache_t pc) |
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pool_cache_invalidate_groups(pc, part); |
pool_cache_invalidate_groups(pc, part); |
} |
} |
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/* |
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* pool_cache_invalidate_cpu: |
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* |
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* Invalidate all CPU-bound cached objects in pool cache, the CPU being |
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* identified by its associated index. |
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* It is caller's responsibility to ensure that no operation is |
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* taking place on this pool cache while doing this invalidation. |
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* WARNING: as no inter-CPU locking is enforced, trying to invalidate |
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* pool cached objects from a CPU different from the one currently running |
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* may result in an undefined behaviour. |
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*/ |
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static void |
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pool_cache_invalidate_cpu(pool_cache_t pc, u_int index) |
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{ |
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pool_cache_cpu_t *cc; |
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pcg_t *pcg; |
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if ((cc = pc->pc_cpus[index]) == NULL) |
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return; |
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if ((pcg = cc->cc_current) != &pcg_dummy) { |
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pcg->pcg_next = NULL; |
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pool_cache_invalidate_groups(pc, pcg); |
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} |
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if ((pcg = cc->cc_previous) != &pcg_dummy) { |
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pcg->pcg_next = NULL; |
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pool_cache_invalidate_groups(pc, pcg); |
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} |
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if (cc != &pc->pc_cpu0) |
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pool_put(&cache_cpu_pool, cc); |
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} |
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void |
void |
pool_cache_set_drain_hook(pool_cache_t pc, void (*fn)(void *, int), void *arg) |
pool_cache_set_drain_hook(pool_cache_t pc, void (*fn)(void *, int), void *arg) |
{ |
{ |
Line 2382 pool_cache_sethardlimit(pool_cache_t pc, |
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Line 2396 pool_cache_sethardlimit(pool_cache_t pc, |
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pool_sethardlimit(&pc->pc_pool, n, warnmess, ratecap); |
pool_sethardlimit(&pc->pc_pool, n, warnmess, ratecap); |
} |
} |
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static inline pool_cache_cpu_t * |
static bool __noinline |
pool_cache_cpu_enter(pool_cache_t pc, int *s) |
pool_cache_get_slow(pool_cache_cpu_t *cc, int s, void **objectp, |
{ |
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pool_cache_cpu_t *cc; |
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/* |
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* Prevent other users of the cache from accessing our |
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* CPU-local data. To avoid touching shared state, we |
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* pull the neccessary information from CPU local data. |
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*/ |
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crit_enter(); |
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cc = pc->pc_cpus[curcpu()->ci_index]; |
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KASSERT(cc->cc_cache == pc); |
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if (cc->cc_ipl != IPL_NONE) { |
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*s = splraiseipl(cc->cc_iplcookie); |
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} |
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KASSERT(((uintptr_t)cc & (CACHE_LINE_SIZE - 1)) == 0); |
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return cc; |
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} |
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static inline void |
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pool_cache_cpu_exit(pool_cache_cpu_t *cc, int *s) |
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{ |
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/* No longer need exclusive access to the per-CPU data. */ |
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if (cc->cc_ipl != IPL_NONE) { |
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splx(*s); |
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} |
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crit_exit(); |
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} |
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#if __GNUC_PREREQ__(3, 0) |
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__attribute ((noinline)) |
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#endif |
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pool_cache_cpu_t * |
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pool_cache_get_slow(pool_cache_cpu_t *cc, int *s, void **objectp, |
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paddr_t *pap, int flags) |
paddr_t *pap, int flags) |
{ |
{ |
pcg_t *pcg, *cur; |
pcg_t *pcg, *cur; |
Line 2426 pool_cache_get_slow(pool_cache_cpu_t *cc |
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Line 2405 pool_cache_get_slow(pool_cache_cpu_t *cc |
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pool_cache_t pc; |
pool_cache_t pc; |
void *object; |
void *object; |
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KASSERT(cc->cc_current->pcg_avail == 0); |
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KASSERT(cc->cc_previous->pcg_avail == 0); |
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pc = cc->cc_cache; |
pc = cc->cc_cache; |
cc->cc_misses++; |
cc->cc_misses++; |
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Line 2433 pool_cache_get_slow(pool_cache_cpu_t *cc |
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Line 2415 pool_cache_get_slow(pool_cache_cpu_t *cc |
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* Nothing was available locally. Try and grab a group |
* Nothing was available locally. Try and grab a group |
* from the cache. |
* from the cache. |
*/ |
*/ |
if (!mutex_tryenter(&pc->pc_lock)) { |
if (__predict_false(!mutex_tryenter(&pc->pc_lock))) { |
ncsw = curlwp->l_ncsw; |
ncsw = curlwp->l_ncsw; |
mutex_enter(&pc->pc_lock); |
mutex_enter(&pc->pc_lock); |
pc->pc_contended++; |
pc->pc_contended++; |
Line 2445 pool_cache_get_slow(pool_cache_cpu_t *cc |
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Line 2427 pool_cache_get_slow(pool_cache_cpu_t *cc |
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*/ |
*/ |
if (curlwp->l_ncsw != ncsw) { |
if (curlwp->l_ncsw != ncsw) { |
mutex_exit(&pc->pc_lock); |
mutex_exit(&pc->pc_lock); |
pool_cache_cpu_exit(cc, s); |
return true; |
return pool_cache_cpu_enter(pc, s); |
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} |
} |
} |
} |
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if ((pcg = pc->pc_fullgroups) != NULL) { |
if (__predict_true((pcg = pc->pc_fullgroups) != NULL)) { |
/* |
/* |
* If there's a full group, release our empty |
* If there's a full group, release our empty |
* group back to the cache. Install the full |
* group back to the cache. Install the full |
* group as cc_current and return. |
* group as cc_current and return. |
*/ |
*/ |
if ((cur = cc->cc_current) != NULL) { |
if (__predict_true((cur = cc->cc_current) != &pcg_dummy)) { |
KASSERT(cur->pcg_avail == 0); |
KASSERT(cur->pcg_avail == 0); |
cur->pcg_next = pc->pc_emptygroups; |
cur->pcg_next = pc->pc_emptygroups; |
pc->pc_emptygroups = cur; |
pc->pc_emptygroups = cur; |
Line 2468 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
Line 2449 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
pc->pc_hits++; |
pc->pc_hits++; |
pc->pc_nfull--; |
pc->pc_nfull--; |
mutex_exit(&pc->pc_lock); |
mutex_exit(&pc->pc_lock); |
return cc; |
return true; |
} |
} |
|
|
/* |
/* |
Line 2478 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
Line 2459 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
*/ |
*/ |
pc->pc_misses++; |
pc->pc_misses++; |
mutex_exit(&pc->pc_lock); |
mutex_exit(&pc->pc_lock); |
pool_cache_cpu_exit(cc, s); |
splx(s); |
|
|
object = pool_get(&pc->pc_pool, flags); |
object = pool_get(&pc->pc_pool, flags); |
*objectp = object; |
*objectp = object; |
if (object == NULL) |
if (__predict_false(object == NULL)) |
return NULL; |
return false; |
|
|
if ((*pc->pc_ctor)(pc->pc_arg, object, flags) != 0) { |
if (__predict_false((*pc->pc_ctor)(pc->pc_arg, object, flags) != 0)) { |
pool_put(&pc->pc_pool, object); |
pool_put(&pc->pc_pool, object); |
*objectp = NULL; |
*objectp = NULL; |
return NULL; |
return false; |
} |
} |
|
|
KASSERT((((vaddr_t)object + pc->pc_pool.pr_itemoffset) & |
KASSERT((((vaddr_t)object + pc->pc_pool.pr_itemoffset) & |
Line 2503 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
Line 2484 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
} |
} |
|
|
FREECHECK_OUT(&pc->pc_freecheck, object); |
FREECHECK_OUT(&pc->pc_freecheck, object); |
return NULL; |
return false; |
} |
} |
|
|
/* |
/* |
Line 2521 pool_cache_get_paddr(pool_cache_t pc, in |
|
Line 2502 pool_cache_get_paddr(pool_cache_t pc, in |
|
int s; |
int s; |
|
|
#ifdef LOCKDEBUG |
#ifdef LOCKDEBUG |
if (flags & PR_WAITOK) |
if (flags & PR_WAITOK) { |
ASSERT_SLEEPABLE(NULL, "pool_cache_get(PR_WAITOK)"); |
ASSERT_SLEEPABLE(); |
|
} |
#endif |
#endif |
|
|
cc = pool_cache_cpu_enter(pc, &s); |
/* Lock out interrupts and disable preemption. */ |
do { |
s = splvm(); |
|
while (/* CONSTCOND */ true) { |
/* Try and allocate an object from the current group. */ |
/* Try and allocate an object from the current group. */ |
|
cc = pc->pc_cpus[curcpu()->ci_index]; |
|
KASSERT(cc->cc_cache == pc); |
pcg = cc->cc_current; |
pcg = cc->cc_current; |
if (pcg != NULL && pcg->pcg_avail > 0) { |
if (__predict_true(pcg->pcg_avail > 0)) { |
object = pcg->pcg_objects[--pcg->pcg_avail].pcgo_va; |
object = pcg->pcg_objects[--pcg->pcg_avail].pcgo_va; |
if (pap != NULL) |
if (__predict_false(pap != NULL)) |
*pap = pcg->pcg_objects[pcg->pcg_avail].pcgo_pa; |
*pap = pcg->pcg_objects[pcg->pcg_avail].pcgo_pa; |
#if defined(DIAGNOSTIC) |
#if defined(DIAGNOSTIC) |
pcg->pcg_objects[pcg->pcg_avail].pcgo_va = NULL; |
pcg->pcg_objects[pcg->pcg_avail].pcgo_va = NULL; |
#endif /* defined(DIAGNOSTIC) */ |
KASSERT(pcg->pcg_avail < pcg->pcg_size); |
KASSERT(pcg->pcg_avail <= pcg->pcg_size); |
|
KASSERT(object != NULL); |
KASSERT(object != NULL); |
|
#endif |
cc->cc_hits++; |
cc->cc_hits++; |
pool_cache_cpu_exit(cc, &s); |
splx(s); |
FREECHECK_OUT(&pc->pc_freecheck, object); |
FREECHECK_OUT(&pc->pc_freecheck, object); |
return object; |
return object; |
} |
} |
Line 2549 pool_cache_get_paddr(pool_cache_t pc, in |
|
Line 2534 pool_cache_get_paddr(pool_cache_t pc, in |
|
* it with the current group and allocate from there. |
* it with the current group and allocate from there. |
*/ |
*/ |
pcg = cc->cc_previous; |
pcg = cc->cc_previous; |
if (pcg != NULL && pcg->pcg_avail > 0) { |
if (__predict_true(pcg->pcg_avail > 0)) { |
cc->cc_previous = cc->cc_current; |
cc->cc_previous = cc->cc_current; |
cc->cc_current = pcg; |
cc->cc_current = pcg; |
continue; |
continue; |
Line 2558 pool_cache_get_paddr(pool_cache_t pc, in |
|
Line 2543 pool_cache_get_paddr(pool_cache_t pc, in |
|
/* |
/* |
* Can't allocate from either group: try the slow path. |
* Can't allocate from either group: try the slow path. |
* If get_slow() allocated an object for us, or if |
* If get_slow() allocated an object for us, or if |
* no more objects are available, it will return NULL. |
* no more objects are available, it will return false. |
* Otherwise, we need to retry. |
* Otherwise, we need to retry. |
*/ |
*/ |
cc = pool_cache_get_slow(cc, &s, &object, pap, flags); |
if (!pool_cache_get_slow(cc, s, &object, pap, flags)) |
} while (cc != NULL); |
break; |
|
} |
|
|
return object; |
return object; |
} |
} |
|
|
#if __GNUC_PREREQ__(3, 0) |
static bool __noinline |
__attribute ((noinline)) |
pool_cache_put_slow(pool_cache_cpu_t *cc, int s, void *object) |
#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; |
pcg_t *pcg, *cur; |
uint64_t ncsw; |
uint64_t ncsw; |
pool_cache_t pc; |
pool_cache_t pc; |
u_int nobj; |
|
|
KASSERT(cc->cc_current->pcg_avail == cc->cc_current->pcg_size); |
|
KASSERT(cc->cc_previous->pcg_avail == cc->cc_previous->pcg_size); |
|
|
pc = cc->cc_cache; |
pc = cc->cc_cache; |
|
pcg = NULL; |
cc->cc_misses++; |
cc->cc_misses++; |
|
|
/* |
/* |
* No free slots locally. Try to grab an empty, unused |
* If there are no empty groups in the cache then allocate one |
* group from the cache. |
* while still unlocked. |
*/ |
*/ |
if (!mutex_tryenter(&pc->pc_lock)) { |
if (__predict_false(pc->pc_emptygroups == NULL)) { |
|
if (__predict_true(!pool_cache_disable)) { |
|
pcg = pool_get(pc->pc_pcgpool, PR_NOWAIT); |
|
} |
|
if (__predict_true(pcg != NULL)) { |
|
pcg->pcg_avail = 0; |
|
pcg->pcg_size = pc->pc_pcgsize; |
|
} |
|
} |
|
|
|
/* Lock the cache. */ |
|
if (__predict_false(!mutex_tryenter(&pc->pc_lock))) { |
ncsw = curlwp->l_ncsw; |
ncsw = curlwp->l_ncsw; |
mutex_enter(&pc->pc_lock); |
mutex_enter(&pc->pc_lock); |
pc->pc_contended++; |
pc->pc_contended++; |
|
|
/* |
/* |
* If we context switched while locking, then |
* If we context switched while locking, then our view of |
* our view of the per-CPU data is invalid: |
* the per-CPU data is invalid: retry. |
* retry. |
|
*/ |
*/ |
if (curlwp->l_ncsw != ncsw) { |
if (__predict_false(curlwp->l_ncsw != ncsw)) { |
mutex_exit(&pc->pc_lock); |
mutex_exit(&pc->pc_lock); |
pool_cache_cpu_exit(cc, s); |
if (pcg != NULL) { |
return pool_cache_cpu_enter(pc, s); |
pool_put(pc->pc_pcgpool, pcg); |
|
} |
|
return true; |
} |
} |
} |
} |
|
|
if ((pcg = pc->pc_emptygroups) != NULL) { |
/* If there are no empty groups in the cache then allocate one. */ |
/* |
if (pcg == NULL && pc->pc_emptygroups != NULL) { |
* If there's a empty group, release our full |
pcg = pc->pc_emptygroups; |
* group back to the cache. Install the empty |
|
* group and return. |
|
*/ |
|
KASSERT(pcg->pcg_avail == 0); |
|
pc->pc_emptygroups = pcg->pcg_next; |
pc->pc_emptygroups = pcg->pcg_next; |
if (cc->cc_previous == NULL) { |
pc->pc_nempty--; |
|
} |
|
|
|
/* |
|
* If there's a empty group, release our full group back |
|
* to the cache. Install the empty group to the local CPU |
|
* and return. |
|
*/ |
|
if (pcg != NULL) { |
|
KASSERT(pcg->pcg_avail == 0); |
|
if (__predict_false(cc->cc_previous == &pcg_dummy)) { |
cc->cc_previous = pcg; |
cc->cc_previous = pcg; |
} else { |
} else { |
if ((cur = cc->cc_current) != NULL) { |
cur = cc->cc_current; |
KASSERT(cur->pcg_avail == pcg->pcg_size); |
if (__predict_true(cur != &pcg_dummy)) { |
|
KASSERT(cur->pcg_avail == cur->pcg_size); |
cur->pcg_next = pc->pc_fullgroups; |
cur->pcg_next = pc->pc_fullgroups; |
pc->pc_fullgroups = cur; |
pc->pc_fullgroups = cur; |
pc->pc_nfull++; |
pc->pc_nfull++; |
Line 2622 pool_cache_put_slow(pool_cache_cpu_t *cc |
|
Line 2627 pool_cache_put_slow(pool_cache_cpu_t *cc |
|
cc->cc_current = pcg; |
cc->cc_current = pcg; |
} |
} |
pc->pc_hits++; |
pc->pc_hits++; |
pc->pc_nempty--; |
|
mutex_exit(&pc->pc_lock); |
mutex_exit(&pc->pc_lock); |
return cc; |
return true; |
} |
} |
|
|
/* |
/* |
* Nothing available locally or in cache. Take the |
* Nothing available locally or in cache, and we didn't |
* slow path and try to allocate a new group that we |
* allocate an empty group. Take the slow path and destroy |
* can release to. |
* the object here and now. |
*/ |
*/ |
pc->pc_misses++; |
pc->pc_misses++; |
mutex_exit(&pc->pc_lock); |
mutex_exit(&pc->pc_lock); |
pool_cache_cpu_exit(cc, s); |
splx(s); |
|
pool_cache_destruct_object(pc, object); |
/* |
|
* If we can't allocate a new group, just throw the |
|
* object away. |
|
*/ |
|
nobj = pc->pc_pcgsize; |
|
if (pool_cache_disable) { |
|
pcg = NULL; |
|
} else if (nobj == PCG_NOBJECTS_LARGE) { |
|
pcg = pool_get(&pcg_large_pool, PR_NOWAIT); |
|
} else { |
|
pcg = pool_get(&pcg_normal_pool, PR_NOWAIT); |
|
} |
|
if (pcg == NULL) { |
|
pool_cache_destruct_object(pc, object); |
|
return NULL; |
|
} |
|
pcg->pcg_avail = 0; |
|
pcg->pcg_size = nobj; |
|
|
|
/* |
|
* 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); |
|
|
|
return pool_cache_cpu_enter(pc, s); |
return false; |
} |
} |
|
|
/* |
/* |
Line 2680 pool_cache_put_paddr(pool_cache_t pc, vo |
|
Line 2657 pool_cache_put_paddr(pool_cache_t pc, vo |
|
pcg_t *pcg; |
pcg_t *pcg; |
int s; |
int s; |
|
|
|
KASSERT(object != NULL); |
FREECHECK_IN(&pc->pc_freecheck, object); |
FREECHECK_IN(&pc->pc_freecheck, object); |
|
|
cc = pool_cache_cpu_enter(pc, &s); |
/* Lock out interrupts and disable preemption. */ |
do { |
s = splvm(); |
|
while (/* CONSTCOND */ true) { |
/* If the current group isn't full, release it there. */ |
/* If the current group isn't full, release it there. */ |
|
cc = pc->pc_cpus[curcpu()->ci_index]; |
|
KASSERT(cc->cc_cache == pc); |
pcg = cc->cc_current; |
pcg = cc->cc_current; |
if (pcg != NULL && pcg->pcg_avail < pcg->pcg_size) { |
if (__predict_true(pcg->pcg_avail < pcg->pcg_size)) { |
pcg->pcg_objects[pcg->pcg_avail].pcgo_va = object; |
pcg->pcg_objects[pcg->pcg_avail].pcgo_va = object; |
pcg->pcg_objects[pcg->pcg_avail].pcgo_pa = pa; |
pcg->pcg_objects[pcg->pcg_avail].pcgo_pa = pa; |
pcg->pcg_avail++; |
pcg->pcg_avail++; |
cc->cc_hits++; |
cc->cc_hits++; |
pool_cache_cpu_exit(cc, &s); |
splx(s); |
return; |
return; |
} |
} |
|
|
/* |
/* |
* That failed. If the previous group is empty, swap |
* That failed. If the previous group isn't full, swap |
* it with the current group and try again. |
* it with the current group and try again. |
*/ |
*/ |
pcg = cc->cc_previous; |
pcg = cc->cc_previous; |
if (pcg != NULL && pcg->pcg_avail == 0) { |
if (__predict_true(pcg->pcg_avail < pcg->pcg_size)) { |
cc->cc_previous = cc->cc_current; |
cc->cc_previous = cc->cc_current; |
cc->cc_current = pcg; |
cc->cc_current = pcg; |
continue; |
continue; |
Line 2709 pool_cache_put_paddr(pool_cache_t pc, vo |
|
Line 2690 pool_cache_put_paddr(pool_cache_t pc, vo |
|
/* |
/* |
* Can't free to either group: try the slow path. |
* Can't free to either group: try the slow path. |
* If put_slow() releases the object for us, it |
* If put_slow() releases the object for us, it |
* will return NULL. Otherwise we need to retry. |
* will return false. Otherwise we need to retry. |
*/ |
*/ |
cc = pool_cache_put_slow(cc, &s, object, pa); |
if (!pool_cache_put_slow(cc, s, object)) |
} while (cc != NULL); |
break; |
|
} |
} |
} |
|
|
/* |
/* |
Line 2726 pool_cache_xcall(pool_cache_t pc) |
|
Line 2708 pool_cache_xcall(pool_cache_t pc) |
|
{ |
{ |
pool_cache_cpu_t *cc; |
pool_cache_cpu_t *cc; |
pcg_t *prev, *cur, **list; |
pcg_t *prev, *cur, **list; |
int s = 0; /* XXXgcc */ |
int s; |
|
|
cc = pool_cache_cpu_enter(pc, &s); |
|
cur = cc->cc_current; |
|
cc->cc_current = NULL; |
|
prev = cc->cc_previous; |
|
cc->cc_previous = NULL; |
|
pool_cache_cpu_exit(cc, &s); |
|
|
|
/* |
|
* XXXSMP Go to splvm to prevent kernel_lock from being taken, |
|
* because locks at IPL_SOFTXXX are still spinlocks. Does not |
|
* apply to IPL_SOFTBIO. Cross-call threads do not take the |
|
* kernel_lock. |
|
*/ |
|
s = splvm(); |
s = splvm(); |
mutex_enter(&pc->pc_lock); |
mutex_enter(&pc->pc_lock); |
if (cur != NULL) { |
cc = pc->pc_cpus[curcpu()->ci_index]; |
|
cur = cc->cc_current; |
|
cc->cc_current = __UNCONST(&pcg_dummy); |
|
prev = cc->cc_previous; |
|
cc->cc_previous = __UNCONST(&pcg_dummy); |
|
if (cur != &pcg_dummy) { |
if (cur->pcg_avail == cur->pcg_size) { |
if (cur->pcg_avail == cur->pcg_size) { |
list = &pc->pc_fullgroups; |
list = &pc->pc_fullgroups; |
pc->pc_nfull++; |
pc->pc_nfull++; |
Line 2757 pool_cache_xcall(pool_cache_t pc) |
|
Line 2731 pool_cache_xcall(pool_cache_t pc) |
|
cur->pcg_next = *list; |
cur->pcg_next = *list; |
*list = cur; |
*list = cur; |
} |
} |
if (prev != NULL) { |
if (prev != &pcg_dummy) { |
if (prev->pcg_avail == prev->pcg_size) { |
if (prev->pcg_avail == prev->pcg_size) { |
list = &pc->pc_fullgroups; |
list = &pc->pc_fullgroups; |
pc->pc_nfull++; |
pc->pc_nfull++; |
|
|
if (pool_in_cg(pp, cc->cc_current, addr) || |
if (pool_in_cg(pp, cc->cc_current, addr) || |
pool_in_cg(pp, cc->cc_previous, addr)) { |
pool_in_cg(pp, cc->cc_previous, addr)) { |
struct cpu_info *ci = |
struct cpu_info *ci = |
cpu_lookup_byindex(i); |
cpu_lookup(i); |
|
|
incpucache = true; |
incpucache = true; |
snprintf(cpucachestr, |
snprintf(cpucachestr, |
sizeof(cpucachestr), |
sizeof(cpucachestr), |
"cached by CPU %u", |
"cached by CPU %u", |
(u_int)ci->ci_cpuid); |
ci->ci_index); |
goto print; |
goto print; |
} |
} |
} |
} |