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Add ISC_TID_MAX with default being 512 threads

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The ISC_TID_MAX variable allows other units to declare static arrays
with this as size for per-thread/per-loop variables.
This commit is contained in:
Ondřej Surý
2025-06-04 18:00:01 +02:00
parent 1032681af0
commit dd37fd6a49
3 changed files with 21 additions and 5 deletions
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20
bin/named/main.c
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@@ -946,6 +946,8 @@ parse_command_line(int argc, char *argv[]) {
static isc_result_t static isc_result_t
create_managers(void) { create_managers(void) {
bool capped = false;
/* /*
* Set the default named_g_cpus if it was not set from the command line * Set the default named_g_cpus if it was not set from the command line
*/ */
@@ -954,11 +956,19 @@ create_managers(void) {
named_g_cpus = named_g_cpus_detected; named_g_cpus = named_g_cpus_detected;
} }
isc_log_write(NAMED_LOGCATEGORY_GENERAL, NAMED_LOGMODULE_SERVER, if (named_g_cpus > ISC_TID_MAX) {
ISC_LOG_INFO, "found %u CPU%s, using %u worker thread%s", capped = true;
named_g_cpus_detected, named_g_cpus = ISC_TID_MAX;
named_g_cpus_detected == 1 ? "" : "s", named_g_cpus, }
named_g_cpus == 1 ? "" : "s");
isc_log_write(
NAMED_LOGCATEGORY_GENERAL, NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"found %u CPU%s, using %u worker thread%s%s",
named_g_cpus_detected, named_g_cpus_detected == 1 ? "" : "s",
named_g_cpus, named_g_cpus == 1 ? "" : "s",
capped ? " (recompile with -DISC_TID_MAX=<n> to raise the "
"thread count limit)"
: "");
isc_managers_create(&named_g_mctx, named_g_cpus, &named_g_loopmgr, isc_managers_create(&named_g_mctx, named_g_cpus, &named_g_loopmgr,
&named_g_netmgr); &named_g_netmgr);

4
lib/isc/include/isc/tid.h
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@@ -23,6 +23,10 @@ typedef int32_t isc_tid_t;
#define ISC_TID_UNKNOWN (isc_tid_t) - 1 #define ISC_TID_UNKNOWN (isc_tid_t) - 1
#ifndef ISC_TID_MAX
#define ISC_TID_MAX 512
#endif /* ISC_TID_MAX */
isc_tid_t isc_tid_t
isc_tid_count(void); isc_tid_count(void);
/*%< /*%<

2
lib/isc/tid.c
View File

@@ -37,12 +37,14 @@ static isc_tid_t tid_count = 0;
void void
isc__tid_init(isc_tid_t tid) { isc__tid_init(isc_tid_t tid) {
REQUIRE(isc__tid_local == ISC_TID_UNKNOWN || isc__tid_local == tid); REQUIRE(isc__tid_local == ISC_TID_UNKNOWN || isc__tid_local == tid);
REQUIRE(tid < ISC_TID_MAX);
isc__tid_local = tid; isc__tid_local = tid;
} }
void void
isc__tid_initcount(isc_tid_t count) { isc__tid_initcount(isc_tid_t count) {
REQUIRE(tid_count == 0 || tid_count == count); REQUIRE(tid_count == 0 || tid_count == count);
REQUIRE(tid_count < ISC_TID_MAX);
tid_count = count; tid_count = count;
} }