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Per-execution-context freelists

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Global free cacheline list is divided into a set of freelists, one
per execution context. When attempting to map addres to cache, first
the freelist for current execution context is considered (fast path).
If current execution context freelist is empty (fast path failure),
mapping function attempts to get freelist from other execution context
list (slow path).

The purpose of this change is improve concurrency in freelist access.
It is part of fine granularity metadata lock implementation.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski
2019-08-26 14:54:19 -04:00
parent f892bb962d
commit 13cf871a13
21 changed files with 545 additions and 204 deletions
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3
src/engine/cache_engine.c
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@@ -169,7 +169,8 @@ static inline bool ocf_seq_cutoff_is_on(ocf_cache_t cache)
if (!ocf_cache_is_device_attached(cache))
return false;
return (cache->device->freelist_part->curr_size <= SEQ_CUTOFF_FULL_MARGIN);
return (ocf_freelist_num_free(cache->freelist) <=
SEQ_CUTOFF_FULL_MARGIN);
}
bool ocf_seq_cutoff_check(ocf_core_t core, uint32_t dir, uint64_t addr,