Date: Mon, 19 Nov 2018 18:24:09 +0000 (UTC) From: Edward Tomasz Napierala <trasz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r340642 - head/lib/libthr/thread Message-ID: <201811191824.wAJIO9LP094171@repo.freebsd.org>
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Author: trasz Date: Mon Nov 19 18:24:08 2018 New Revision: 340642 URL: https://svnweb.freebsd.org/changeset/base/340642 Log: Make libthr(3) use sysconf(_SC_NPROCESSORS_CONF); this shaves off two calls to sysctl(2) from the binary startup. Reviewed by: kib MFC after: 2 weeks Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D18046 Modified: head/lib/libthr/thread/thr_init.c Modified: head/lib/libthr/thread/thr_init.c ============================================================================== --- head/lib/libthr/thread/thr_init.c Mon Nov 19 18:23:17 2018 (r340641) +++ head/lib/libthr/thread/thr_init.c Mon Nov 19 18:24:08 2018 (r340642) @@ -474,8 +474,9 @@ init_private(void) PANIC("Cannot get stack rlimit"); _thr_stack_initial = rlim.rlim_cur; } - len = sizeof(_thr_is_smp); - sysctlbyname("kern.smp.cpus", &_thr_is_smp, &len, NULL, 0); + _thr_is_smp = sysconf(_SC_NPROCESSORS_CONF); + if (_thr_is_smp == -1) + PANIC("Cannot get _SC_NPROCESSORS_CONF"); _thr_is_smp = (_thr_is_smp > 1); _thr_page_size = getpagesize(); _thr_guard_default = _thr_page_size;
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