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PAC: Add an init function.

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This commit is contained in:
David Goldblatt
2020-05-29 17:32:37 -07:00
committed by David Goldblatt
parent 722652222a
commit 7efcb946c4
8 changed files with 54 additions and 30 deletions
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33
src/pa.c
View File

@@ -26,39 +26,12 @@ pa_shard_init(tsdn_t *tsdn, pa_shard_t *shard, emap_t *emap, base_t *base,
nstime_t *cur_time, ssize_t dirty_decay_ms, ssize_t muzzy_decay_ms) {
/* This will change eventually, but for now it should hold. */
assert(base_ind_get(base) == ind);
/*
* Delay coalescing for dirty extents despite the disruptive effect on
* memory layout for best-fit extent allocation, since cached extents
* are likely to be reused soon after deallocation, and the cost of
* merging/splitting extents is non-trivial.
*/
if (ecache_init(tsdn, &shard->pac.ecache_dirty, extent_state_dirty, ind,
/* delay_coalesce */ true)) {
return true;
}
/*
* Coalesce muzzy extents immediately, because operations on them are in
* the critical path much less often than for dirty extents.
*/
if (ecache_init(tsdn, &shard->pac.ecache_muzzy, extent_state_muzzy, ind,
/* delay_coalesce */ false)) {
return true;
}
/*
* Coalesce retained extents immediately, in part because they will
* never be evicted (and therefore there's no opportunity for delayed
* coalescing), but also because operations on retained extents are not
* in the critical path.
*/
if (ecache_init(tsdn, &shard->pac.ecache_retained, extent_state_retained,
ind, /* delay_coalesce */ false)) {
return true;
}
if (edata_cache_init(&shard->edata_cache, base)) {
return true;
}
shard->pac.edata_cache = &shard->edata_cache;
if (pac_init(tsdn, &shard->pac, ind, &shard->edata_cache)) {
return true;
}
if (ecache_grow_init(tsdn, &shard->ecache_grow)) {
return true;
}

39
src/pac.c Normal file
View File

@@ -0,0 +1,39 @@
#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/jemalloc_internal_includes.h"
#include "jemalloc/internal/pac.h"
bool
pac_init(tsdn_t *tsdn, pac_t *pac, unsigned ind, edata_cache_t *edata_cache) {
/*
* Delay coalescing for dirty extents despite the disruptive effect on
* memory layout for best-fit extent allocation, since cached extents
* are likely to be reused soon after deallocation, and the cost of
* merging/splitting extents is non-trivial.
*/
if (ecache_init(tsdn, &pac->ecache_dirty, extent_state_dirty, ind,
/* delay_coalesce */ true)) {
return true;
}
/*
* Coalesce muzzy extents immediately, because operations on them are in
* the critical path much less often than for dirty extents.
*/
if (ecache_init(tsdn, &pac->ecache_muzzy, extent_state_muzzy, ind,
/* delay_coalesce */ false)) {
return true;
}
/*
* Coalesce retained extents immediately, in part because they will
* never be evicted (and therefore there's no opportunity for delayed
* coalescing), but also because operations on retained extents are not
* in the critical path.
*/
if (ecache_init(tsdn, &pac->ecache_retained, extent_state_retained,
ind, /* delay_coalesce */ false)) {
return true;
}
pac->edata_cache = edata_cache;
return false;
}