Meador Inge 995a46bbfb get_nprocs: Only return explictly set cache values (BZ #16996) ... The implementation of __get_nprocs uses a stactic variable to cache the value of the current number of processors. The caching breaks when 'time (NULL) == 0': $ cat nproc.c #include <stdio.h> #include <time.h> #include <sys/time.h> int main(int argc, char *argv[]) { time_t t; struct timeval tv = {0, 0}; printf("settimeofday({0, 0}, NULL) = %d\n", settimeofday(&tv, NULL)); t = time(NULL); printf("Time: %d, CPUs: %d\n", (unsigned int)t, get_nprocs()); return 0; } $ gcc -O3 nproc.c $ ./a.out settimeofday({0, 0}, NULL) = -1 Time: 1401311578, CPUs: 4 $ sudo ./a.out settimeofday({0, 0}, NULL) = 0 Time: 0, CPUs: 0 The problem is with the condition used to check whether a cached value should be returned or not: static int cached_result; static time_t timestamp; time_t now = time (NULL); time_t prev = timestamp; atomic_read_barrier (); if (now == prev) return cached_result; This patch fixes the problem by ensuring that 'cached_result' has been set at least once before returning it.		2014-06-13 14:02:04 +05:30
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alpha	alpha: Fix __pointer_chk_guard definition for the testsuite	2014-04-16 21:35:27 -07:00
arm
bsd
i386
inet
mips
powerpc
sh
sysv/linux	get_nprocs: Only return explictly set cache values (BZ #16996)	2014-06-13 14:02:04 +05:30
x86_64
clock_gettime.c
clock_nanosleep.c
clock_settime.c
confstr.h
get_child_max.c
getlogin_r.c
getlogin.c
getpagesize.c
grantpt.c	Fix macro warning on HAVE_PT_CHOWN	2014-05-14 09:46:54 +02:00
ifreq.c
Implies
make-syscalls.sh
Makefile
s-proto-cancel.S
s-proto.S
setxid.h
sockatmark.c
stime.c
Subdirs
syscall-template.S
syscall.S
syscalls.list
sysdep.h