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Use -1 for LRU list terminator instead of collision_table_entries

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Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
root 2020-09-24 15:44:44 +02:00 committed by Adam Rutkowski
parent 58f8a2218a
commit ef08141252
1 changed files with 23 additions and 36 deletions
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59
src/eviction/lru.c
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@ -15,18 +15,19 @@
#define OCF_EVICTION_MAX_SCAN 1024
static const ocf_cache_line_t end_marker = (ocf_cache_line_t)-1;
/* Adds the given collision_index to the _head_ of the LRU list */
static void add_lru_head(ocf_cache_t cache,
struct ocf_lru_list *list,
unsigned int collision_index,
unsigned int end_marker)
unsigned int collision_index)
{
union eviction_policy_meta eviction;
struct lru_eviction_policy_meta *node;
unsigned int curr_head_index;
ENV_BUG_ON(collision_index >= end_marker);
ENV_BUG_ON(collision_index == end_marker);
ocf_metadata_get_evicition_policy(cache, collision_index, &eviction);
node = &eviction.lru;
@ -74,15 +75,14 @@ static void add_lru_head(ocf_cache_t cache,
/* Deletes the node with the given collision_index from the lru list */
static void remove_lru_list(ocf_cache_t cache,
struct ocf_lru_list *list,
unsigned int collision_index,
unsigned int end_marker)
unsigned int collision_index)
{
int is_head = 0, is_tail = 0;
uint32_t prev_lru_node, next_lru_node;
union eviction_policy_meta eviction;
struct lru_eviction_policy_meta *node;
ENV_BUG_ON(collision_index >= end_marker);
ENV_BUG_ON(collision_index == end_marker);
ocf_metadata_get_evicition_policy(cache, collision_index, &eviction);
node = &eviction.lru;
@ -115,7 +115,7 @@ static void remove_lru_list(ocf_cache_t cache,
union eviction_policy_meta eviction_next;
struct lru_eviction_policy_meta *next_node;
ENV_BUG_ON(next_lru_node >= end_marker);
ENV_BUG_ON(next_lru_node == end_marker);
ocf_metadata_get_evicition_policy(cache, next_lru_node,
&eviction_next);
@ -139,7 +139,7 @@ static void remove_lru_list(ocf_cache_t cache,
union eviction_policy_meta eviction_prev;
struct lru_eviction_policy_meta *prev_node;
ENV_BUG_ON(prev_lru_node >= end_marker);
ENV_BUG_ON(prev_lru_node == end_marker);
list->tail = prev_lru_node;
@ -166,8 +166,8 @@ static void remove_lru_list(ocf_cache_t cache,
struct lru_eviction_policy_meta *prev_node;
struct lru_eviction_policy_meta *next_node;
ENV_BUG_ON(next_lru_node >= end_marker);
ENV_BUG_ON(prev_lru_node >= end_marker);
ENV_BUG_ON(next_lru_node == end_marker);
ENV_BUG_ON(prev_lru_node == end_marker);
ocf_metadata_get_evicition_policy(cache, next_lru_node,
&eviction_next);
@ -201,8 +201,6 @@ void evp_lru_init_cline(ocf_cache_t cache, ocf_cache_line_t cline)
{
union eviction_policy_meta eviction;
struct lru_eviction_policy_meta *node;
const uint32_t end_marker =
cache->device->collision_table_entries;
ocf_metadata_get_evicition_policy(cache, cline, &eviction);
node = &eviction.lru;
@ -220,14 +218,12 @@ void evp_lru_rm_cline(ocf_cache_t cache, ocf_cache_line_t cline)
ocf_part_id_t part_id = ocf_metadata_get_partition_id(cache, cline);
struct ocf_user_part *part = &cache->user_parts[part_id];
struct ocf_lru_list *list;
const unsigned int end_marker =
cache->device->collision_table_entries;
list = metadata_test_dirty(cache, cline) ?
&part->runtime->eviction.policy.lru.dirty :
&part->runtime->eviction.policy.lru.clean;
remove_lru_list(cache, list, cline, end_marker);
remove_lru_list(cache, list, cline);
}
static void evp_lru_clean_end(void *private_data, int error)
@ -244,7 +240,7 @@ static int evp_lru_clean_getter(ocf_cache_t cache,
struct ocf_cleaner_attribs *attribs = getter_context;
ocf_cache_line_t prev_cline, curr_cline = attribs->getter_item;
while (curr_cline < cache->device->collision_table_entries) {
while (curr_cline != end_marker) {
ocf_metadata_get_evicition_policy(cache, curr_cline,
&eviction);
prev_cline = eviction.lru.prev;
@ -364,12 +360,10 @@ uint32_t evp_lru_req_clines(ocf_cache_t cache, ocf_queue_t io_queue,
curr_cline = part->runtime->eviction.policy.lru.clean.tail;
/* Find cachelines to be evicted. */
while (i < cline_no) {
ENV_BUG_ON(curr_cline > cache->device->collision_table_entries);
if (!evp_lru_can_evict(cache))
break;
if (curr_cline == cache->device->collision_table_entries)
if (curr_cline == end_marker)
break;
ocf_metadata_get_evicition_policy(cache, curr_cline,
@ -407,7 +401,7 @@ uint32_t evp_lru_req_clines(ocf_cache_t cache, ocf_queue_t io_queue,
}
if (i < cline_no && part->runtime->eviction.policy.lru.dirty.tail !=
cache->device->collision_table_entries) {
end_marker) {
evp_lru_clean(cache, io_queue, part_id, cline_no - i);
}
@ -420,7 +414,6 @@ void evp_lru_hot_cline(ocf_cache_t cache, ocf_cache_line_t cline)
{
ocf_part_id_t part_id = ocf_metadata_get_partition_id(cache, cline);
struct ocf_user_part *part = &cache->user_parts[part_id];
uint32_t end_marker = cache->device->collision_table_entries;
union eviction_policy_meta eviction;
struct lru_eviction_policy_meta *node;
int cline_dirty;
@ -437,14 +430,14 @@ void evp_lru_hot_cline(ocf_cache_t cache, ocf_cache_line_t cline)
if (node->next != end_marker ||
node->prev != end_marker ||
list->head == cline || list->tail == cline) {
remove_lru_list(cache, list, cline, end_marker);
remove_lru_list(cache, list, cline);
}
/* Update LRU */
add_lru_head(cache, list, cline, end_marker);
add_lru_head(cache, list, cline);
}
static inline void _lru_init(struct ocf_lru_list *list, unsigned end_marker)
static inline void _lru_init(struct ocf_lru_list *list)
{
list->num_nodes = 0;
list->head = end_marker;
@ -453,8 +446,6 @@ static inline void _lru_init(struct ocf_lru_list *list, unsigned end_marker)
void evp_lru_init_evp(ocf_cache_t cache, ocf_part_id_t part_id)
{
unsigned int end_marker =
cache->device->collision_table_entries;
struct ocf_user_part *part = &cache->user_parts[part_id];
struct ocf_lru_list *clean_list;
struct ocf_lru_list *dirty_list;
@ -462,16 +453,14 @@ void evp_lru_init_evp(ocf_cache_t cache, ocf_part_id_t part_id)
clean_list = &part->runtime->eviction.policy.lru.clean;
dirty_list = &part->runtime->eviction.policy.lru.dirty;
_lru_init(clean_list, end_marker);
_lru_init(dirty_list, end_marker);
_lru_init(clean_list);
_lru_init(dirty_list);
}
void evp_lru_clean_cline(ocf_cache_t cache, ocf_part_id_t part_id,
uint32_t cline)
{
struct ocf_user_part *part = &cache->user_parts[part_id];
const unsigned int end_marker =
cache->device->collision_table_entries;
struct ocf_lru_list *clean_list;
struct ocf_lru_list *dirty_list;
@ -479,16 +468,14 @@ void evp_lru_clean_cline(ocf_cache_t cache, ocf_part_id_t part_id,
dirty_list = &part->runtime->eviction.policy.lru.dirty;
OCF_METADATA_EVICTION_LOCK();
remove_lru_list(cache, dirty_list, cline, end_marker);
add_lru_head(cache, clean_list, cline, end_marker);
remove_lru_list(cache, dirty_list, cline);
add_lru_head(cache, clean_list, cline);
OCF_METADATA_EVICTION_UNLOCK();
}
void evp_lru_dirty_cline(ocf_cache_t cache, ocf_part_id_t part_id,
uint32_t cline)
{
const unsigned int end_marker =
cache->device->collision_table_entries;
struct ocf_user_part *part = &cache->user_parts[part_id];
struct ocf_lru_list *clean_list;
struct ocf_lru_list *dirty_list;
@ -497,8 +484,8 @@ void evp_lru_dirty_cline(ocf_cache_t cache, ocf_part_id_t part_id,
dirty_list = &part->runtime->eviction.policy.lru.dirty;
OCF_METADATA_EVICTION_LOCK();
remove_lru_list(cache, clean_list, cline, end_marker);
add_lru_head(cache, dirty_list, cline, end_marker);
remove_lru_list(cache, clean_list, cline);
add_lru_head(cache, dirty_list, cline);
OCF_METADATA_EVICTION_UNLOCK();
}