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Route attribute hash replaced with the generic one

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Maria Matejka 2024-06-04 12:09:41 +02:00
parent 423eaf3438
commit b033561045
2 changed files with 33 additions and 66 deletions
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1
lib/route.h
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@ -253,7 +253,6 @@ enum ea_stored {
struct ea_storage {
struct ea_storage *next_hash; /* Next in hash chain */
struct ea_storage **pprev_hash; /* Previous in hash chain */
_Atomic u32 uc; /* Use count */
u32 hash_key; /* List hash */
ea_list l[0]; /* The list itself */

88
nest/rt-attr.c
View File

@ -1623,53 +1623,17 @@ ea_append(ea_list *to, ea_list *what)
* rta's
*/
static uint rta_cache_count;
static uint rta_cache_size = 32;
static uint rta_cache_limit;
static uint rta_cache_mask;
static struct ea_storage **rta_hash_table;
static HASH(struct ea_storage) rta_hash_table;
static void
rta_alloc_hash(void)
{
rta_hash_table = mb_allocz(rta_pool, sizeof(struct ea_storage *) * rta_cache_size);
if (rta_cache_size < 32768)
rta_cache_limit = rta_cache_size * 2;
else
rta_cache_limit = ~0;
rta_cache_mask = rta_cache_size - 1;
}
#define RTAH_KEY(a) a->l, a->hash_key
#define RTAH_NEXT(a) a->next_hash
#define RTAH_EQ(a, b) ((a)->hash_key == (b)->hash_key) && (ea_same((a), (b)))
#define RTAH_FN(a, h) h
static inline void
rta_insert(struct ea_storage *r)
{
uint h = r->hash_key & rta_cache_mask;
r->next_hash = rta_hash_table[h];
if (r->next_hash)
r->next_hash->pprev_hash = &r->next_hash;
r->pprev_hash = &rta_hash_table[h];
rta_hash_table[h] = r;
}
#define RTAH_REHASH rta_rehash
#define RTAH_PARAMS /8, *2, 2, 2, 12, 28
static void
rta_rehash(void)
{
uint ohs = rta_cache_size;
uint h;
struct ea_storage *r, *n;
struct ea_storage **oht = rta_hash_table;
rta_cache_size = 2*rta_cache_size;
DBG("Rehashing rta cache from %d to %d entries.\n", ohs, rta_cache_size);
rta_alloc_hash();
for(h=0; h<ohs; h++)
for(r=oht[h]; r; r=n)
{
n = r->next_hash;
rta_insert(r);
}
mb_free(oht);
}
HASH_DEFINE_REHASH_FN(RTAH, struct ea_storage);
/**
* rta_lookup - look up a &rta in attribute cache
@ -1687,7 +1651,7 @@ rta_rehash(void)
ea_list *
ea_lookup_slow(ea_list *o, u32 squash_upto, enum ea_stored oid)
{
struct ea_storage *r;
struct ea_storage *r = NULL;
uint h;
ASSERT(o->stored != oid);
@ -1699,8 +1663,17 @@ ea_lookup_slow(ea_list *o, u32 squash_upto, enum ea_stored oid)
RTA_LOCK;
for(r=rta_hash_table[h & rta_cache_mask]; r; r=r->next_hash)
if (r->hash_key == h && ea_same(r->l, o) && BIT32_TEST(&squash_upto, r->l->stored))
for (struct ea_storage *ea = HASH_FIND_CHAIN(rta_hash_table, RTAH, o, h);
ea;
ea = RTAH_NEXT(ea))
if (
(h == ea->hash_key) &&
ea_same(o, ea->l) &&
BIT32_TEST(&squash_upto, ea->l->stored) &&
(!r || r->l->stored > ea->l->stored))
r = ea;
if (r)
{
atomic_fetch_add_explicit(&r->uc, 1, memory_order_acq_rel);
RTA_UNLOCK;
@ -1728,10 +1701,7 @@ ea_lookup_slow(ea_list *o, u32 squash_upto, enum ea_stored oid)
r->hash_key = h;
atomic_store_explicit(&r->uc, 1, memory_order_release);
rta_insert(r);
if (++rta_cache_count > rta_cache_limit)
rta_rehash();
HASH_INSERT2(rta_hash_table, RTAH, rta_pool, r);
RTA_UNLOCK;
return r->l;
@ -1744,11 +1714,7 @@ ea_free_locked(struct ea_storage *a)
if (atomic_load_explicit(&a->uc, memory_order_acquire))
return;
ASSERT(rta_cache_count);
rta_cache_count--;
*a->pprev_hash = a->next_hash;
if (a->next_hash)
a->next_hash->pprev_hash = a->pprev_hash;
HASH_REMOVE2(rta_hash_table, RTAH, rta_pool, a);
ea_list_unref(a->l);
if (a->l->flags & EALF_HUGE)
@ -1790,14 +1756,15 @@ ea_dump_all(void)
{
RTA_LOCK;
debug("Route attribute cache (%d entries, rehash at %d):\n", rta_cache_count, rta_cache_limit);
for (uint h=0; h < rta_cache_size; h++)
for (struct ea_storage *a = rta_hash_table[h]; a; a = a->next_hash)
debug("Route attribute cache (%d entries, order %d):\n", rta_hash_table.count, rta_hash_table.order);
HASH_WALK(rta_hash_table, next_hash, a)
{
debug("%p ", a);
ea_dump(a->l);
debug("\n");
}
HASH_WALK_END;
debug("\n");
RTA_UNLOCK;
@ -1828,7 +1795,8 @@ rta_init(void)
for (uint i=0; i<ARRAY_SIZE(ea_slab_sizes); i++)
ea_slab[i] = sl_new(rta_pool, ea_slab_sizes[i]);
rta_alloc_hash();
HASH_INIT(rta_hash_table, rta_pool, 12);
rte_src_init();
ea_class_init();