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Make dns_dispatch bound to threads

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Instead of high number of dispatches (4 * named_g_udpdisp)[1], make the
dispatches bound to threads and make dns_dispatchset_t create a dispatch
for each thread (event loop).

This required couple of other changes:

1. The dns_dispatch_createudp() must be called on loop, so the isc_tid()
   is already initialized - changes to nsupdate and mdig were required.

2. The dns_requestmgr had only a single dispatch per v4 and v6.  Instead
   of using single dispatch, use dns_dispatchset_t for each protocol -
   this is same as dns_resolver.
This commit is contained in:
Ondřej Surý
2023-09-15 11:36:28 +02:00
parent 282c4709b8
commit 6fd06c461b
19 changed files with 132 additions and 208 deletions
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9
bin/named/server.c
View File

@@ -4033,7 +4033,7 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist, cfg_obj_t *config,
named_cache_t *nsc;
bool zero_no_soattl;
dns_acl_t *clients = NULL, *mapped = NULL, *excluded = NULL;
unsigned int query_timeout, ndisp;
unsigned int query_timeout;
bool old_rpz_ok = false;
dns_dyndbctx_t *dctx = NULL;
unsigned int resolver_param;
@@ -4685,9 +4685,8 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist, cfg_obj_t *config,
goto cleanup;
}
ndisp = 4 * ISC_MIN(named_g_udpdisp, MAX_UDP_DISPATCH);
CHECK(dns_view_createresolver(
view, named_g_loopmgr, ndisp, named_g_netmgr, resopts,
view, named_g_loopmgr, named_g_netmgr, resopts,
named_g_server->tlsctx_client_cache, dispatch4, dispatch6));
if (resstats == NULL) {
@@ -12148,10 +12147,6 @@ named_server_status(named_server_t *server, isc_buffer_t **text) {
snprintf(line, sizeof(line), "worker threads: %u\n", named_g_cpus);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "UDP listeners per interface: %u\n",
named_g_udpdisp);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "number of zones: %u (%u automatic)\n",
zonecount, automatic);
CHECK(putstr(text, line));