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Replace locked mempools with memory contexts

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Current mempools are kind of hybrid structures - they serve two
purposes:

 1. mempool with a lock is basically static sized allocator with
    pre-allocated free items

 2. mempool without a lock is a doubly-linked list of preallocated items

The first kind of usage could be easily replaced with jemalloc small
sized arena objects and thread-local caches.

The second usage not-so-much and we need to keep this (in
libdns:message.c) for performance reasons.
This commit is contained in:
Ondřej Surý
2021-05-12 21:16:17 +02:00
parent fd3ceec475
commit f487c6948b
12 changed files with 161 additions and 653 deletions
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6
lib/isc/netmgr/netmgr-int.h
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@@ -669,12 +669,6 @@ struct isc_nm {
isc_stats_t *stats;
isc_mempool_t *reqpool;
isc_mutex_t reqlock;
isc_mempool_t *evpool;
isc_mutex_t evlock;
uint_fast32_t workers_running;
atomic_uint_fast32_t workers_paused;
atomic_uint_fast32_t maxudp;