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Diffstat (limited to 'src/or/config.c')
-rw-r--r--src/or/config.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/src/or/config.c b/src/or/config.c
index c5b0ccf586..23cad9268b 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -307,7 +307,7 @@ static config_var_t _option_vars[] = {
V(WarnUnsafeSocks, BOOL, "1"),
V(NoPublish, BOOL, "0"),
VAR("NodeFamily", LINELIST, NodeFamilies, NULL),
- V(NumCpus, UINT, "1"),
+ V(NumCpus, UINT, "0"),
V(NumEntryGuards, UINT, "3"),
V(ORListenAddress, LINELIST, NULL),
V(ORPort, UINT, "0"),
@@ -4892,6 +4892,19 @@ config_parse_interval(const char *s, int *ok)
return (int)r;
}
+/** Return the number of cpus configured in <b>options</b>. If we are
+ * told to auto-detect the number of cpus, return the auto-detected number. */
+int
+get_num_cpus(const or_options_t *options)
+{
+ if (options->NumCpus == 0) {
+ int n = compute_num_cpus();
+ return (n >= 1) ? n : 1;
+ } else {
+ return options->NumCpus;
+ }
+}
+
/**
* Initialize the libevent library.
*/
@@ -4913,7 +4926,7 @@ init_libevent(const or_options_t *options)
memset(&cfg, 0, sizeof(cfg));
cfg.disable_iocp = options->DisableIOCP;
- cfg.num_cpus = options->NumCpus;
+ cfg.num_cpus = get_num_cpus(options);
tor_libevent_initialize(&cfg);