github/ocf
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Enable particular ioclass eviction

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

32
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];
free = ocf_freelist_num_free(cache->freelist);
if (evict_cline_no <= free)
return LOOKUP_MAPPED;
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);
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;