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From 6d6acf236841da5c2511f8afcd3e4a89af4c5658 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Witold=20Kr=C4=99cicki?= <wpk@isc.org>
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Date: Fri, 14 Feb 2020 09:18:48 +0100
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Subject: [PATCH] Use RESOLVER_NTASKS_PERCPU - 32 for regular tuning, 8 for
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small
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Modify original upstream commit 0d80266f7e3, add high limit of used
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tasks. Minimum would be lower on machines with few cpus, but maximum
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would stay unchanged. Should prevent negatives of this change.
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Signed-off-by: Petr Mensik <pemensik@redhat.com>
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---
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bin/named/server.c | 12 ++++++++----
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1 file changed, 8 insertions(+), 4 deletions(-)
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diff --git a/bin/named/server.c b/bin/named/server.c
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index 39b1124..94b4daa 100644
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--- a/bin/named/server.c
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+++ b/bin/named/server.c
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@@ -148,11 +148,13 @@
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#endif
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#ifdef TUNE_LARGE
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-#define RESOLVER_NTASKS 523
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+#define RESOLVER_NTASKS_MAX 523
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+#define RESOLVER_NTASKS_PERCPU 32
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#define UDPBUFFERS 32768
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#define EXCLBUFFERS 32768
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#else
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-#define RESOLVER_NTASKS 31
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+#define RESOLVER_NTASKS_MAX 31
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+#define RESOLVER_NTASKS_PERCPU 8
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#define UDPBUFFERS 1000
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#define EXCLBUFFERS 4096
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#endif /* TUNE_LARGE */
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@@ -3318,7 +3320,7 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
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ns_cache_t *nsc;
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bool zero_no_soattl;
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dns_acl_t *clients = NULL, *mapped = NULL, *excluded = NULL;
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- unsigned int query_timeout, ndisp;
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+ unsigned int query_timeout, ndisp, ntasks;
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bool old_rpz_ok = false;
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isc_dscp_t dscp4 = -1, dscp6 = -1;
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dns_dyndbctx_t *dctx = NULL;
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@@ -3926,7 +3928,9 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
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dns_view_setresquerystats(view, resquerystats);
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ndisp = 4 * ISC_MIN(ns_g_udpdisp, MAX_UDP_DISPATCH);
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- CHECK(dns_view_createresolver(view, ns_g_taskmgr, RESOLVER_NTASKS,
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+ ntasks = ISC_MIN(RESOLVER_NTASKS_PERCPU * ns_g_cpus,
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+ RESOLVER_NTASKS_MAX);
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+ CHECK(dns_view_createresolver(view, ns_g_taskmgr, ntasks,
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ndisp, ns_g_socketmgr, ns_g_timermgr,
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resopts, ns_g_dispatchmgr,
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dispatch4, dispatch6));
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--
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2.34.1
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