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Enable particular ioclass eviction

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If partition's occupancy limit is reached, cachelines should be evicted from
 request's target partition.

Information whether particular partition eviction should be triggered is
carried as a flag by request which triggered eviction.

Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
This commit is contained in:
Michal Mielewczyk 2020-10-15 18:19:13 -04:00
parent e9d7290078
commit 718dc743c8
2 changed files with 64 additions and 5 deletions
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22
src/eviction/eviction.c
View File

@ -40,6 +40,22 @@ static uint32_t ocf_evict_calculate(struct ocf_user_part *part,
return to_evict;
}
static inline uint32_t ocf_evict_part_do(ocf_cache_t cache,
ocf_queue_t io_queue, const uint32_t evict_cline_no,
struct ocf_user_part *target_part)
{
uint32_t to_evict = 0;
if (!evp_lru_can_evict(cache))
return 0;
to_evict = ocf_evict_calculate(&cache->user_parts[target_part_id],
evict_cline_no);
return ocf_eviction_need_space(cache, io_queue,
target_part, to_evict);
}
static inline uint32_t ocf_evict_do(ocf_cache_t cache,
ocf_queue_t io_queue, const uint32_t evict_cline_no,
struct ocf_user_part *target_part)
@ -109,12 +125,18 @@ int space_managment_evict_do(struct ocf_cache *cache,
uint32_t free;
struct ocf_user_part *req_part = &cache->user_parts[req->part_id];
if (ocf_req_part_evict(req)) {
evicted = ocf_evict_part_do(cache, req->io_queue, evict_cline_no,
req_part);
} else {
free = ocf_freelist_num_free(cache->freelist);
if (evict_cline_no <= free)
return LOOKUP_MAPPED;
evict_cline_no -= free;
evicted = ocf_evict_do(cache, req->io_queue, evict_cline_no, req_part);
}
if (evict_cline_no <= evicted)
return LOOKUP_MAPPED;

37
src/ocf_request.h
View File

@ -191,6 +191,9 @@ struct ocf_request {
uint8_t wi_second_pass : 1;
/*!< Set after first pass of WI write is completed */
uint8_t part_evict : 1;
/* !< Some cachelines from request's partition must be evicted */
log_sid_t sid;
/*!< Tracing sequence ID */
@ -332,6 +335,40 @@ void ocf_req_clear_map(struct ocf_request *req);
*/
void ocf_req_hash(struct ocf_request *req);
/**
* @brief Request should trigger eviction from it's target partition
*
* @param req - OCF request
*/
static inline void ocf_req_set_part_evict(struct ocf_request *req)
{
req->part_evict = true;
}
/**
* @brief Request shouldn't trigger eviction from it's target partition
*
* @param req - OCF request
*/
static inline void ocf_req_clear_part_evict(struct ocf_request *req)
{
req->part_evict = false;
}
/**
* @brief Check wheter request shouldn't trigger eviction from it's target
* partition or any partition
*
* @param req - OCF request
* @return true - Eviciton should be triggered from request's target partition
* @return false - Eviction should be triggered with respect to eviction
* priority
*/
static inline bool ocf_req_part_evict(struct ocf_request *req)
{
return req->part_evict;
}
int ocf_req_set_dirty(struct ocf_request *req);
/**