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Split global metadata lock

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Divide single global lock instance into 4 to reduce contention
in multiple read-locks scenario.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski
2020-12-28 10:34:16 +01:00
parent 10c3c3de36
commit 05780c98ed
11 changed files with 148 additions and 68 deletions
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9
src/cleaning/acp.c
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@@ -13,6 +13,7 @@
#include "../cleaning/acp.h"
#include "../engine/engine_common.h"
#include "../concurrency/ocf_cache_line_concurrency.h"
#include "../concurrency/ocf_metadata_concurrency.h"
#include "cleaning_priv.h"
#define OCF_ACP_DEBUG 0
@@ -385,8 +386,11 @@ static ocf_cache_line_t _acp_trylock_dirty(struct ocf_cache *cache,
{
struct ocf_map_info info;
bool locked = false;
unsigned lock_idx = ocf_metadata_concurrency_next_idx(
cache->cleaner.io_queue);
ocf_hb_cline_prot_lock_rd(&cache->metadata.lock, core_id, core_line);
ocf_hb_cline_prot_lock_rd(&cache->metadata.lock, lock_idx, core_id,
core_line);
ocf_engine_lookup_map_entry(cache, &info, core_id,
core_line);
@@ -397,7 +401,8 @@ static ocf_cache_line_t _acp_trylock_dirty(struct ocf_cache *cache,
locked = true;
}
ocf_hb_cline_prot_unlock_rd(&cache->metadata.lock, core_id, core_line);
ocf_hb_cline_prot_unlock_rd(&cache->metadata.lock, lock_idx, core_id,
core_line);
return locked ? info.coll_idx : cache->device->collision_table_entries;
}