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eliminate fallback cache in text cache layer; we can use the hash store layer to rewind

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This commit is contained in:
Ryan Fleury
2024-03-26 12:11:00 -07:00
parent 9dc484858a
commit 88b692c840
4 changed files with 38 additions and 129 deletions
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src/text_cache/text_cache.c
+27 -84
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@@ -644,16 +644,6 @@ txt_init(void)
txt_shared->stripes[idx].rw_mutex = os_rw_mutex_alloc();
txt_shared->stripes[idx].cv = os_condition_variable_alloc();
}
txt_shared->fallback_slots_count = 256;
txt_shared->fallback_stripes_count = Min(txt_shared->fallback_slots_count, os_logical_core_count());
txt_shared->fallback_slots = push_array(arena, TXT_KeyFallbackSlot, txt_shared->fallback_slots_count);
txt_shared->fallback_stripes = push_array(arena, TXT_Stripe, txt_shared->fallback_stripes_count);
for(U64 idx = 0; idx < txt_shared->fallback_stripes_count; idx += 1)
{
txt_shared->fallback_stripes[idx].arena = arena_alloc();
txt_shared->fallback_stripes[idx].rw_mutex = os_rw_mutex_alloc();
txt_shared->fallback_stripes[idx].cv = os_condition_variable_alloc();
}
txt_shared->u2p_ring_size = KB(64);
txt_shared->u2p_ring_base = push_array_no_zero(arena, U8, txt_shared->u2p_ring_size);
txt_shared->u2p_ring_cv = os_condition_variable_alloc();
@@ -767,7 +757,7 @@ txt_scope_touch_node__stripe_r_guarded(TXT_Scope *scope, TXT_Node *node)
//~ rjf: Cache Lookups
internal TXT_TextInfo
txt_text_info_from_key_hash_lang(TXT_Scope *scope, U128 key, U128 hash, TXT_LangKind lang)
txt_text_info_from_hash_lang(TXT_Scope *scope, U128 hash, TXT_LangKind lang)
{
TXT_TextInfo info = {0};
if(!u128_match(hash, u128_zero()))
@@ -825,63 +815,46 @@ txt_text_info_from_key_hash_lang(TXT_Scope *scope, U128 key, U128 hash, TXT_Lang
}
if(node_is_new)
{
txt_u2p_enqueue_req(key, hash, lang, max_U64);
}
if(!found)
{
U128 fallback_hash = {0};
TXT_LangKind fallback_lang = TXT_LangKind_Null;
U64 fallback_slot_idx = key.u64[1]%txt_shared->fallback_slots_count;
U64 fallback_stripe_idx = fallback_slot_idx%txt_shared->fallback_stripes_count;
TXT_KeyFallbackSlot *fallback_slot = &txt_shared->fallback_slots[fallback_slot_idx];
TXT_Stripe *fallback_stripe = &txt_shared->fallback_stripes[fallback_stripe_idx];
OS_MutexScopeR(fallback_stripe->rw_mutex) for(TXT_KeyFallbackNode *n = fallback_slot->first; n != 0; n = n->next)
{
if(u128_match(key, n->key))
{
fallback_hash = n->hash;
break;
}
}
if(!u128_match(fallback_hash, u128_zero()))
{
U64 retry_slot_idx = fallback_hash.u64[1]%txt_shared->slots_count;
U64 retry_stripe_idx = retry_slot_idx%txt_shared->stripes_count;
TXT_Slot *retry_slot = &txt_shared->slots[retry_slot_idx];
TXT_Stripe *retry_stripe = &txt_shared->stripes[retry_stripe_idx];
OS_MutexScopeR(retry_stripe->rw_mutex)
{
for(TXT_Node *n = retry_slot->first; n != 0; n = n->next)
{
if(u128_match(fallback_hash, n->hash) && fallback_lang == n->lang)
{
MemoryCopyStruct(&info, &n->info);
txt_scope_touch_node__stripe_r_guarded(scope, n);
break;
}
}
}
}
txt_u2p_enqueue_req(hash, lang, max_U64);
}
}
return info;
}
internal TXT_TextInfo
txt_text_info_from_key_lang(TXT_Scope *scope, U128 key, TXT_LangKind lang, U128 *hash_out)
{
TXT_TextInfo result = {0};
for(U64 rewind_idx = 0; rewind_idx < 2; rewind_idx += 1)
{
U128 hash = hs_hash_from_key(key, rewind_idx);
result = txt_text_info_from_hash_lang(scope, hash, lang);
if(result.lines_count != 0)
{
if(hash_out)
{
*hash_out = hash;
}
break;
}
}
return result;
}
////////////////////////////////
//~ rjf: Transfer Threads
internal B32
txt_u2p_enqueue_req(U128 key, U128 hash, TXT_LangKind lang, U64 endt_us)
txt_u2p_enqueue_req(U128 hash, TXT_LangKind lang, U64 endt_us)
{
B32 good = 0;
OS_MutexScope(txt_shared->u2p_ring_mutex) for(;;)
{
U64 unconsumed_size = txt_shared->u2p_ring_write_pos - txt_shared->u2p_ring_read_pos;
U64 available_size = txt_shared->u2p_ring_size - unconsumed_size;
if(available_size >= sizeof(key)+sizeof(hash))
if(available_size >= sizeof(hash)+sizeof(lang))
{
good = 1;
txt_shared->u2p_ring_write_pos += ring_write_struct(txt_shared->u2p_ring_base, txt_shared->u2p_ring_size, txt_shared->u2p_ring_write_pos, &key);
txt_shared->u2p_ring_write_pos += ring_write_struct(txt_shared->u2p_ring_base, txt_shared->u2p_ring_size, txt_shared->u2p_ring_write_pos, &hash);
txt_shared->u2p_ring_write_pos += ring_write_struct(txt_shared->u2p_ring_base, txt_shared->u2p_ring_size, txt_shared->u2p_ring_write_pos, &lang);
break;
@@ -900,14 +873,13 @@ txt_u2p_enqueue_req(U128 key, U128 hash, TXT_LangKind lang, U64 endt_us)
}
internal void
txt_u2p_dequeue_req(U128 *key_out, U128 *hash_out, TXT_LangKind *lang_out)
txt_u2p_dequeue_req(U128 *hash_out, TXT_LangKind *lang_out)
{
OS_MutexScope(txt_shared->u2p_ring_mutex) for(;;)
{
U64 unconsumed_size = txt_shared->u2p_ring_write_pos - txt_shared->u2p_ring_read_pos;
if(unconsumed_size >= sizeof(*key_out) + sizeof(*hash_out))
if(unconsumed_size >= sizeof(*hash_out) + sizeof(*lang_out))
{
txt_shared->u2p_ring_read_pos += ring_read_struct(txt_shared->u2p_ring_base, txt_shared->u2p_ring_size, txt_shared->u2p_ring_read_pos, key_out);
txt_shared->u2p_ring_read_pos += ring_read_struct(txt_shared->u2p_ring_base, txt_shared->u2p_ring_size, txt_shared->u2p_ring_read_pos, hash_out);
txt_shared->u2p_ring_read_pos += ring_read_struct(txt_shared->u2p_ring_base, txt_shared->u2p_ring_size, txt_shared->u2p_ring_read_pos, lang_out);
break;
@@ -925,10 +897,9 @@ txt_parse_thread__entry_point(void *p)
HS_Scope *scope = hs_scope_open();
//- rjf: get next key
U128 key = {0};
U128 hash = {0};
TXT_LangKind lang = TXT_LangKind_Null;
txt_u2p_dequeue_req(&key, &hash, &lang);
txt_u2p_dequeue_req(&hash, &lang);
//- rjf: unpack hash
U64 slot_idx = hash.u64[1]%txt_shared->slots_count;
@@ -1057,34 +1028,6 @@ txt_parse_thread__entry_point(void *p)
}
}
//- rjf: commit this key/hash pair to fallback cache
if(got_task && !u128_match(key, u128_zero()) && !u128_match(hash, u128_zero()))
{
U64 fallback_slot_idx = key.u64[1]%txt_shared->fallback_slots_count;
U64 fallback_stripe_idx = fallback_slot_idx%txt_shared->fallback_stripes_count;
TXT_KeyFallbackSlot *fallback_slot = &txt_shared->fallback_slots[fallback_slot_idx];
TXT_Stripe *fallback_stripe = &txt_shared->fallback_stripes[fallback_stripe_idx];
OS_MutexScopeW(fallback_stripe->rw_mutex)
{
TXT_KeyFallbackNode *node = 0;
for(TXT_KeyFallbackNode *n = fallback_slot->first; n != 0; n = n->next)
{
if(u128_match(n->key, key))
{
node = n;
break;
}
}
if(node == 0)
{
node = push_array(fallback_stripe->arena, TXT_KeyFallbackNode, 1);
SLLQueuePush(fallback_slot->first, fallback_slot->last, node);
}
node->key = key;
node->hash = hash;
}
}
hs_scope_close(scope);
}
}