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MINOR: global: add option to disable numa detection

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Render numa detection optional with a global configuration statement
'no numa-cpu-mapping'. This can be used if the applied affinity of the
algorithm is not optimal. Also complete the documentation with this new
keyword.
This commit is contained in:
Amaury Denoyelle
2021-03-26 18:50:33 +01:00
parent b56a7c89a8
commit 0f50cb9c73
5 changed files with 24 additions and 4 deletions
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6
src/cfgparse-global.c
View File

@@ -42,7 +42,8 @@ static const char *common_kw_list[] = {
"log-send-hostname", "server-state-base", "server-state-file",
"log-tag", "spread-checks", "max-spread-checks", "cpu-map", "setenv",
"presetenv", "unsetenv", "resetenv", "strict-limits", "localpeer",
"defaults", "listen", "frontend", "backend", "peers", "resolvers",
"numa-cpu-mapping", "defaults", "listen", "frontend", "backend",
"peers", "resolvers",
NULL /* must be last */
};
@@ -1288,6 +1289,9 @@ int cfg_parse_global(const char *file, int linenum, char **args, int kwm)
}
setenv("HAPROXY_LOCALPEER", localpeer, 1);
}
else if (strcmp(args[0], "numa-cpu-mapping") == 0) {
global.numa_cpu_mapping = (kwm == KWM_NO) ? 0 : 1;
}
else {
struct cfg_kw_list *kwl;
const char *best;

8
src/cfgparse.c
View File

@@ -1846,10 +1846,12 @@ next_line:
if (kwm != KWM_STD && strcmp(args[0], "option") != 0 &&
strcmp(args[0], "log") != 0 && strcmp(args[0], "busy-polling") != 0 &&
strcmp(args[0], "set-dumpable") != 0 && strcmp(args[0], "strict-limits") != 0 &&
strcmp(args[0], "insecure-fork-wanted") != 0) {
strcmp(args[0], "insecure-fork-wanted") != 0 &&
strcmp(args[0], "numa-cpu-mapping") != 0) {
ha_alert("parsing [%s:%d]: negation/default currently "
"supported only for options, log, busy-polling, "
"set-dumpable, strict-limits, and insecure-fork-wanted.\n", file, linenum);
"set-dumpable, strict-limits, insecure-fork-wanted "
"and numa-cpu-mapping.\n", file, linenum);
err_code |= ERR_ALERT | ERR_FATAL;
fatal++;
}
@@ -2189,7 +2191,7 @@ int check_config_validity()
if (global.nbproc == 1) {
int numa_cores = 0;
#if defined(__linux__) && defined USE_CPU_AFFINITY
if (!thread_cpu_mask_forced())
if (global.numa_cpu_mapping && !thread_cpu_mask_forced())
numa_cores = numa_detect_topology();
#endif
global.nbthread = numa_cores ? numa_cores :

1
src/haproxy.c
View File

@@ -160,6 +160,7 @@ volatile unsigned long stopping_thread_mask = 0; /* Threads acknowledged stoppin
struct global global = {
.hard_stop_after = TICK_ETERNITY,
.nbproc = 1,
.numa_cpu_mapping = 1,
.nbthread = 0,
.req_count = 0,
.logsrvs = LIST_HEAD_INIT(global.logsrvs),