Hello people, I have spent the previous day but could not figure out the way yet to solve my problem. I want to use the function sched_getcpu(); to get the core ids where my MPI processes run. I have used the following code
#define _GNU_SOURCE
#include
int cpu = sched_getcpu();
but it seems that the kernal contains the glibc that does not contain this function (Or I do not know exactly how to link this library).
I also tried to use
#include
int cpu = syscall(318);
but still i got the cpu = -1.
My linux is: Linux neolith1 2.6.18-238.12.1.el5 #1 SMP Tue May 31 13:22:04 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux
glibc installed is: glibc-2.5-58.el5_6.3
"icc -v" shows me the following
Version 10.1
ld /usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crt1.o /usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crti.o /usr/lib/gcc/x86_64-redhat-linux/4.1.2/crtbegin.o --eh-frame-hdr -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out --rpath /software/intel/cce/10.1.017/lib -L/software/intel/cce/10.1.017/lib -L/usr/lib/gcc/x86_64-redhat-linux/4.1.2/ -L/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64 -limf -lsvml -lm -lipgo -lintlc -lgcc_s -lgcc -lintlc -lc -lgcc_s -lgcc -lirc_s -ldl -lc /usr/lib/gcc/x86_64-redhat-linux/4.1.2/crtend.o /usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crtn.o
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
rm /tmp/iccbIhF9glibgcc
rm /tmp/iccTYPjcGgnudirs
rm /tmp/iccEishiugnudirs
I am linking like this (there are other libraries linked as well that worked fine)
icc -I/home/x_mudma/experiments/libs/gnugsl/include -c cannon.c -Nmpi -lrt -O0 -w
icc -L/home/x_mudma/experiments/libs/gnugsl/lib cannon.o -o output.o -lgsl -lgslcblas -lm -O0 -Nmpi
But on the above statements, it gives me
cannon.o: In function `main':
cannon.c:(.text+0xa6): undefined reference to `sched_getcpu'
Please help me to solve my problem
Thanks Mudassar
