| version 1.151, 2008/02/14 11:45:24 |
version 1.151.6.3, 2008/09/28 10:40:53 |
|
|
| /* $NetBSD$ */ |
/* $NetBSD$ */ |
| |
|
| /*- |
/*- |
| * 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 |
|
|
| * 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 |
|
| * must display the following acknowledgement: |
|
| * This product includes software developed by the NetBSD |
|
| * Foundation, Inc. and its contributors. |
|
| * 4. Neither the name of The NetBSD Foundation nor the names of its |
|
| * contributors may be used to endorse or promote products derived |
|
| * from this software without specific prior written permission. |
|
| * |
* |
| * 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 186 static struct pool cache_cpu_pool; |
|
| Line 179 static struct pool cache_cpu_pool; |
|
| 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); |
| |
|
| int pool_cache_disable; |
int pool_cache_disable; /* global disable for caching */ |
| |
static const pcg_t pcg_dummy; /* zero sized: always empty, yet always full */ |
| |
|
| |
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); |
|
| 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 *); |
| static void pool_cache_xcall(pool_cache_t); |
static void pool_cache_xcall(pool_cache_t); |
| Line 612 pool_subsystem_init(void) |
|
| Line 605 pool_subsystem_init(void) |
|
| pa_reclaim_register(pa); |
pa_reclaim_register(pa); |
| } |
} |
| |
|
| 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); |
| |
|
| 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); |
| } |
} |
| |
|
| Line 814 pool_init(struct pool *pp, size_t size, |
|
| Line 807 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_DEFAULT, ipl); |
| * XXXAD hack to prevent IP input processing from blocking. |
|
| */ |
|
| if (ipl == IPL_SOFTNET) { |
|
| mutex_init(&pp->pr_lock, MUTEX_DEFAULT, IPL_VM); |
|
| } else { |
|
| 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 855 pool_init(struct pool *pp, size_t size, |
|
| Line 841 pool_init(struct pool *pp, size_t size, |
|
| |
|
| 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); |
| |
|
| 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); |
| } |
} |
| |
|
| Line 878 pool_init(struct pool *pp, size_t size, |
|
| Line 864 pool_init(struct pool *pp, size_t size, |
|
| if (__predict_true(!cold)) |
if (__predict_true(!cold)) |
| mutex_exit(&pool_head_lock); |
mutex_exit(&pool_head_lock); |
| |
|
| /* 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) |
|
| Line 981 pool_get(struct pool *pp, int flags) |
|
| |
|
| #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(); |
| |
} |
| #endif |
#endif |
| |
|
| mutex_enter(&pp->pr_lock); |
mutex_enter(&pp->pr_lock); |
| Line 1266 pool_do_put(struct pool *pp, void *v, st |
|
| Line 1253 pool_do_put(struct pool *pp, void *v, st |
|
| |
|
| 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) |
|
| pp->pr_nidle++; |
|
| cv_broadcast(&pp->pr_cv); |
cv_broadcast(&pp->pr_cv); |
| return; |
|
| } |
} |
| |
|
| /* |
/* |
| Line 1288 pool_do_put(struct pool *pp, void *v, st |
|
| Line 1272 pool_do_put(struct pool *pp, void *v, st |
|
| if (ph->ph_nmissing == 0) { |
if (ph->ph_nmissing == 0) { |
| pp->pr_nidle++; |
pp->pr_nidle++; |
| if (pp->pr_npages > pp->pr_minpages && |
if (pp->pr_npages > pp->pr_minpages && |
| (pp->pr_npages > pp->pr_maxpages || |
pp->pr_npages > pp->pr_maxpages) { |
| pa_starved_p(pp->pr_alloc))) { |
|
| pr_rmpage(pp, ph, pq); |
pr_rmpage(pp, ph, pq); |
| } else { |
} else { |
| LIST_REMOVE(ph, ph_pagelist); |
LIST_REMOVE(ph, ph_pagelist); |
| Line 1544 pool_update_curpage(struct pool *pp) |
|
| Line 1527 pool_update_curpage(struct pool *pp) |
|
| 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); |
| } |
} |
| |
KASSERT((pp->pr_curpage == NULL && pp->pr_nitems == 0) || |
| |
(pp->pr_curpage != NULL && pp->pr_nitems > 0)); |
| } |
} |
| |
|
| void |
void |
| Line 1629 pool_reclaim(struct pool *pp) |
|
| Line 1614 pool_reclaim(struct pool *pp) |
|
| } |
} |
| |
|
| /* |
/* |
| * 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. |
|
| */ |
*/ |
| 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 2074 pool_cache_bootstrap(pool_cache_t pc, si |
|
| Line 2058 pool_cache_bootstrap(pool_cache_t pc, si |
|
| 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); |
| |
mutex_init(&pc->pc_lock, MUTEX_DEFAULT, ipl); |
| /* |
|
| * XXXAD hack to prevent IP input processing from blocking. |
|
| */ |
|
| if (ipl == IPL_SOFTNET) { |
|
| mutex_init(&pc->pc_lock, MUTEX_DEFAULT, IPL_VM); |
|
| } else { |
|
| mutex_init(&pc->pc_lock, MUTEX_DEFAULT, ipl); |
|
| } |
|
| |
|
| if (ctor == NULL) { |
if (ctor == NULL) { |
| ctor = (int (*)(void *, void *, int))nullop; |
ctor = (int (*)(void *, void *, int))nullop; |
| Line 2108 pool_cache_bootstrap(pool_cache_t pc, si |
|
| Line 2084 pool_cache_bootstrap(pool_cache_t pc, si |
|
| |
|
| if ((flags & PR_LARGECACHE) != 0) { |
if ((flags & PR_LARGECACHE) != 0) { |
| pc->pc_pcgsize = PCG_NOBJECTS_LARGE; |
pc->pc_pcgsize = PCG_NOBJECTS_LARGE; |
| |
pc->pc_pcgpool = &pcg_large_pool; |
| } else { |
} else { |
| pc->pc_pcgsize = PCG_NOBJECTS_NORMAL; |
pc->pc_pcgsize = PCG_NOBJECTS_NORMAL; |
| |
pc->pc_pcgpool = &pcg_normal_pool; |
| } |
} |
| |
|
| /* Allocate per-CPU caches. */ |
/* Allocate per-CPU caches. */ |
| Line 2174 pool_cache_destroy(pool_cache_t pc) |
|
| Line 2152 pool_cache_destroy(pool_cache_t pc) |
|
| for (i = 0; i < MAXCPUS; i++) { |
for (i = 0; i < MAXCPUS; i++) { |
| if ((cc = pc->pc_cpus[i]) == NULL) |
if ((cc = pc->pc_cpus[i]) == NULL) |
| continue; |
continue; |
| if ((pcg = cc->cc_current) != NULL) { |
if ((pcg = cc->cc_current) != &pcg_dummy) { |
| pcg->pcg_next = NULL; |
pcg->pcg_next = NULL; |
| pool_cache_invalidate_groups(pc, pcg); |
pool_cache_invalidate_groups(pc, pcg); |
| } |
} |
| if ((pcg = cc->cc_previous) != NULL) { |
if ((pcg = cc->cc_previous) != &pcg_dummy) { |
| pcg->pcg_next = NULL; |
pcg->pcg_next = NULL; |
| pool_cache_invalidate_groups(pc, pcg); |
pool_cache_invalidate_groups(pc, pcg); |
| } |
} |
| Line 2206 pool_cache_cpu_init1(struct cpu_info *ci |
|
| Line 2184 pool_cache_cpu_init1(struct cpu_info *ci |
|
| index = ci->ci_index; |
index = ci->ci_index; |
| |
|
| KASSERT(index < MAXCPUS); |
KASSERT(index < MAXCPUS); |
| KASSERT(((uintptr_t)pc->pc_cpus & (CACHE_LINE_SIZE - 1)) == 0); |
|
| |
|
| 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 2233 pool_cache_cpu_init1(struct cpu_info *ci |
|
| Line 2210 pool_cache_cpu_init1(struct cpu_info *ci |
|
| 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); |
| |
|
| pc->pc_cpus[index] = cc; |
pc->pc_cpus[index] = cc; |
| } |
} |
| Line 2383 pool_cache_sethardlimit(pool_cache_t pc, |
|
| Line 2360 pool_cache_sethardlimit(pool_cache_t pc, |
|
| pool_sethardlimit(&pc->pc_pool, n, warnmess, ratecap); |
pool_sethardlimit(&pc->pc_pool, n, warnmess, ratecap); |
| } |
} |
| |
|
| 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, |
| { |
|
| pool_cache_cpu_t *cc; |
|
| |
|
| /* |
|
| * 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. |
|
| */ |
|
| crit_enter(); |
|
| cc = pc->pc_cpus[curcpu()->ci_index]; |
|
| KASSERT(cc->cc_cache == pc); |
|
| if (cc->cc_ipl != IPL_NONE) { |
|
| *s = splraiseipl(cc->cc_iplcookie); |
|
| } |
|
| KASSERT(((uintptr_t)cc & (CACHE_LINE_SIZE - 1)) == 0); |
|
| |
|
| return cc; |
|
| } |
|
| |
|
| static inline void |
|
| pool_cache_cpu_exit(pool_cache_cpu_t *cc, int *s) |
|
| { |
|
| |
|
| /* No longer need exclusive access to the per-CPU data. */ |
|
| if (cc->cc_ipl != IPL_NONE) { |
|
| splx(*s); |
|
| } |
|
| crit_exit(); |
|
| } |
|
| |
|
| #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) |
paddr_t *pap, int flags) |
| { |
{ |
| pcg_t *pcg, *cur; |
pcg_t *pcg, *cur; |
| Line 2427 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
| Line 2369 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
| pool_cache_t pc; |
pool_cache_t pc; |
| void *object; |
void *object; |
| |
|
| |
KASSERT(cc->cc_current->pcg_avail == 0); |
| |
KASSERT(cc->cc_previous->pcg_avail == 0); |
| |
|
| pc = cc->cc_cache; |
pc = cc->cc_cache; |
| cc->cc_misses++; |
cc->cc_misses++; |
| |
|
| Line 2434 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
| Line 2379 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
| * 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 2446 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
| Line 2391 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
| */ |
*/ |
| 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); |
|
| } |
} |
| } |
} |
| |
|
| 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 2469 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
| Line 2413 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 2479 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
| Line 2423 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 2504 pool_cache_get_slow(pool_cache_cpu_t *cc |
|
| Line 2448 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 2522 pool_cache_get_paddr(pool_cache_t pc, in |
|
| Line 2466 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 2550 pool_cache_get_paddr(pool_cache_t pc, in |
|
| Line 2498 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 2559 pool_cache_get_paddr(pool_cache_t pc, in |
|
| Line 2507 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; |
| cc->cc_misses++; |
cc->cc_misses++; |
| |
|
| /* |
/* Lock the cache. */ |
| * No free slots locally. Try to grab an empty, unused |
if (__predict_false(!mutex_tryenter(&pc->pc_lock))) { |
| * group from the cache. |
|
| */ |
|
| if (!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); |
return true; |
| return pool_cache_cpu_enter(pc, s); |
|
| } |
} |
| } |
} |
| |
|
| if ((pcg = pc->pc_emptygroups) != NULL) { |
/* If there are no empty groups in the cache then allocate one. */ |
| /* |
if (__predict_false((pcg = pc->pc_emptygroups) == NULL)) { |
| * If there's a empty group, release our full |
if (__predict_true(!pool_cache_disable)) { |
| * group back to the cache. Install the empty |
pcg = pool_get(pc->pc_pcgpool, PR_NOWAIT); |
| * group and return. |
} |
| */ |
if (__predict_true(pcg != NULL)) { |
| KASSERT(pcg->pcg_avail == 0); |
pcg->pcg_avail = 0; |
| |
pcg->pcg_size = pc->pc_pcgsize; |
| |
} |
| |
} else { |
| 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 2623 pool_cache_put_slow(pool_cache_cpu_t *cc |
|
| Line 2580 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 2683 pool_cache_put_paddr(pool_cache_t pc, vo |
|
| Line 2612 pool_cache_put_paddr(pool_cache_t pc, vo |
|
| |
|
| 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 2710 pool_cache_put_paddr(pool_cache_t pc, vo |
|
| Line 2642 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 2727 pool_cache_xcall(pool_cache_t pc) |
|
| Line 2660 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 2758 pool_cache_xcall(pool_cache_t pc) |
|
| Line 2683 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++; |
|
|
| 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; |
| } |
} |
| } |
} |