13cf871a13
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>
35 lines
930 B
C
35 lines
930 B
C
/*
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* Copyright(c) 2019-2019 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause-Clear
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*/
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#ifndef __OCF_FREELIST_H__
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#define __OCF_FREELIST_H__
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#include "ocf_cache_priv.h"
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struct ocf_freelist;
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typedef struct ocf_freelist *ocf_freelist_t;
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/* Init / deinit freelist runtime structures */
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ocf_freelist_t ocf_freelist_init(struct ocf_cache *cache);
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void ocf_freelist_deinit(ocf_freelist_t freelist);
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/* Assign unused cachelines to freelist */
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void ocf_freelist_populate(ocf_freelist_t freelist,
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ocf_cache_line_t num_free_clines);
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/* Get cacheline from freelist */
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bool ocf_freelist_get_cache_line(ocf_freelist_t freelist,
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ocf_cache_line_t *cline);
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/* Put cacheline back to freelist */
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void ocf_freelist_put_cache_line(ocf_freelist_t freelist,
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ocf_cache_line_t cline);
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/* Return total number of free cachelines */
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ocf_cache_line_t ocf_freelist_num_free(ocf_freelist_t freelist);
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#endif /* __OCF_FREELIST_H__ */
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