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Emap: Internal rtree context setting.

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The only time sharing an rtree context saves across extent operations isn't a
no-op is when tsd is unavailable.  But this happens only in situations like
thread death or initialization, and we don't care about shaving off every
possible cycle in such scenarios.
This commit is contained in:
David Goldblatt
2020-02-05 13:51:05 -08:00
committed by David Goldblatt
parent 08eb1e6c31
commit 1d449bd9a6
3 changed files with 139 additions and 135 deletions
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48
include/jemalloc/internal/emap.h
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@@ -27,16 +27,16 @@ void emap_lock_edata2(tsdn_t *tsdn, emap_t *emap, edata_t *edata1,
edata_t *edata2);
void emap_unlock_edata2(tsdn_t *tsdn, emap_t *emap, edata_t *edata1,
edata_t *edata2);
edata_t *emap_lock_edata_from_addr(tsdn_t *tsdn, emap_t *emap,
rtree_ctx_t *rtree_ctx, void *addr, bool inactive_only);
edata_t *emap_lock_edata_from_addr(tsdn_t *tsdn, emap_t *emap, void *addr,
bool inactive_only);
/*
* Associate the given edata with its beginning and end address, setting the
* szind and slab info appropriately.
* Returns true on error (i.e. resource exhaustion).
*/
bool emap_register_boundary(tsdn_t *tsdn, emap_t *emap, rtree_ctx_t *rtree_ctx,
edata_t *edata, szind_t szind, bool slab);
bool emap_register_boundary(tsdn_t *tsdn, emap_t *emap, edata_t *edata,
szind_t szind, bool slab);
/*
* Does the same thing, but with the interior of the range, for slab
@@ -57,13 +57,11 @@ bool emap_register_boundary(tsdn_t *tsdn, emap_t *emap, rtree_ctx_t *rtree_ctx,
* touched, so no allocation is necessary to fill the interior once the boundary
* has been touched.
*/
void emap_register_interior(tsdn_t *tsdn, emap_t *emap, rtree_ctx_t *rtree_ctx,
edata_t *edata, szind_t szind);
void emap_register_interior(tsdn_t *tsdn, emap_t *emap, edata_t *edata,
szind_t szind);
void emap_deregister_boundary(tsdn_t *tsdn, emap_t *emap,
rtree_ctx_t *rtree_ctx, edata_t *edata);
void emap_deregister_interior(tsdn_t *tsdn, emap_t *emap,
rtree_ctx_t *rtree_ctx, edata_t *edata);
void emap_deregister_boundary(tsdn_t *tsdn, emap_t *emap, edata_t *edata);
void emap_deregister_interior(tsdn_t *tsdn, emap_t *emap, edata_t *edata);
typedef struct emap_prepare_s emap_prepare_t;
struct emap_prepare_s {
@@ -74,9 +72,12 @@ struct emap_prepare_s {
};
/**
* These functions do some of the metadata management for merging and splitting
* extents. In particular, they set the mappings from addresses to edatas and
* fill in lead and trail.
* These functions do some of the metadata management for merging, splitting,
* and reusing extents. In particular, they set the boundary mappings from
* addresses to edatas and fill in the szind, size, and slab values for the
* output edata (and, for splitting, *all* values for the trail). If the result
* is going to be used as a slab, you still need to call emap_register_interior
* on it, though.
*
* Each operation has a "prepare" and a "commit" portion. The prepare portion
* does the operations that can be done without exclusive access to the extent
@@ -89,15 +90,26 @@ struct emap_prepare_s {
* and esn values) data for the split variants, and can be reused for any
* purpose by its given arena after a merge or a failed split.
*/
bool emap_split_prepare(tsdn_t *tsdn, emap_t *emap, rtree_ctx_t *rtree_ctx,
emap_prepare_t *prepare, edata_t *edata, size_t size_a, szind_t szind_a,
bool slab_a, edata_t *trail, size_t size_b, szind_t szind_b, bool slab_b);
void emap_remap(tsdn_t *tsdn, emap_t *emap, edata_t *edata, size_t size,
szind_t szind, bool slab);
bool emap_split_prepare(tsdn_t *tsdn, emap_t *emap, emap_prepare_t *prepare,
edata_t *edata, size_t size_a, szind_t szind_a, bool slab_a, edata_t *trail,
size_t size_b, szind_t szind_b, bool slab_b);
void emap_split_commit(tsdn_t *tsdn, emap_t *emap, emap_prepare_t *prepare,
edata_t *lead, size_t size_a, szind_t szind_a, bool slab_a, edata_t *trail,
size_t size_b, szind_t szind_b, bool slab_b);
void emap_merge_prepare(tsdn_t *tsdn, emap_t *emap, rtree_ctx_t *rtree_ctx,
emap_prepare_t *prepare, edata_t *lead, edata_t *trail);
void emap_merge_prepare(tsdn_t *tsdn, emap_t *emap, emap_prepare_t *prepare,
edata_t *lead, edata_t *trail);
void emap_merge_commit(tsdn_t *tsdn, emap_t *emap, emap_prepare_t *prepare,
edata_t *lead, edata_t *trail);
/* Assert that the emap's view of the given edata matches the edata's view. */
void emap_do_assert_mapped(tsdn_t *tsdn, emap_t *emap, edata_t *edata);
static inline void
emap_assert_mapped(tsdn_t *tsdn, emap_t *emap, edata_t *edata) {
if (config_debug) {
emap_do_assert_mapped(tsdn, emap, edata);
}
}
#endif /* JEMALLOC_INTERNAL_EMAP_H */