Date: Wed, 27 Jun 2012 20:32:45 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r237660 - head/lib/libc/gen Message-ID: <201206272032.q5RKWjvt031174@svn.freebsd.org>
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Author: kib Date: Wed Jun 27 20:32:45 2012 New Revision: 237660 URL: http://svn.freebsd.org/changeset/base/237660 Log: Optimize the handling of SC_NPROCESSORS_CONF, by using auxv AT_NCPU value if present. MFC after: 1 week Modified: head/lib/libc/gen/sysconf.c Modified: head/lib/libc/gen/sysconf.c ============================================================================== --- head/lib/libc/gen/sysconf.c Wed Jun 27 20:24:25 2012 (r237659) +++ head/lib/libc/gen/sysconf.c Wed Jun 27 20:32:45 2012 (r237660) @@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$"); #include <sys/resource.h> #include <sys/socket.h> +#include <elf.h> #include <errno.h> #include <limits.h> #include <paths.h> @@ -51,6 +52,7 @@ __FBSDID("$FreeBSD$"); #include "../stdlib/atexit.h" #include "tzfile.h" /* from ../../../contrib/tzcode/stdtime */ +#include "libc_private.h" #define _PATH_ZONEINFO TZDIR /* from tzfile.h */ @@ -585,6 +587,8 @@ yesno: case _SC_NPROCESSORS_CONF: case _SC_NPROCESSORS_ONLN: + if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0) + return ((long)value); mib[0] = CTL_HW; mib[1] = HW_NCPU; break;
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