https://bugzilla.novell.com/show_bug.cgi?id=811546
https://bugzilla.novell.com/show_bug.cgi?id=811546#c9
Cristian Morales Vega changed:
What |Removed |Added
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CC| |christian.morales.vega@gmai
| |l.com
--- Comment #9 from Cristian Morales Vega 2013-04-09 17:27:28 UTC ---
The problem can be reproduced with just
#include
int main() {
for(int i=0; i<100000000; i++)
{
sin(0);
}
}
Compiled with
gcc -fno-builtin -O0 -std=c99 check_speed.c -Wl,-rpath=. -lm
$ \time ./a.out
4.56user 0.00system 0:04.56elapsed 99%CPU (0avgtext+0avgdata 1920maxresident)k
0inputs+0outputs (0major+166minor)pagefaults 0swaps
$ \time ./a.out
4.56user 0.00system 0:04.56elapsed 99%CPU (0avgtext+0avgdata 1920maxresident)k
0inputs+0outputs (0major+165minor)pagefaults 0swaps
$ cd a2/
$ \time ./a.out
0.40user 0.00system 0:00.40elapsed 99%CPU (0avgtext+0avgdata 1920maxresident)k
0inputs+0outputs (0major+161minor)pagefaults 0swaps
$ \time ./a.out
0.40user 0.00system 0:00.41elapsed 100%CPU (0avgtext+0avgdata 1920maxresident)k
0inputs+0outputs (0major+160minor)pagefaults 0swaps
(in "a2" I have a copy of openSUSE 12.2's libm)
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