12-16-2015
Hi ,
I am try the below command on linux os ,it throwing error but when using same thing in mac os it working ,please advise
Linux ip-172-31-28-233 4.1.10-17.31.amzn1.x86_64 #1 SMP Sat Oct 24 01:31:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
[hadoop@ip-172-31-28-233 ~]$ date -uj +%s000 $(date -u +%m%d0000%Y)
date: invalid option -- 'j'
Thanks,
Mohan
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LEARN ABOUT DEBIAN
getcpu
GETCPU(2) Linux Programmer's Manual GETCPU(2)
NAME
getcpu - determine CPU and NUMA node on which the calling thread is running
SYNOPSIS
#include <linux/getcpu.h>
int getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache);
Note: There is no glibc wrapper for this system call; see NOTES.
DESCRIPTION
The getcpu() system call identifies the processor and node on which the calling thread or process is currently running and writes them into
the integers pointed to by the cpu and node arguments. The processor is a unique small integer identifying a CPU. The node is a unique
small identifier identifying a NUMA node. When either cpu or node is NULL nothing is written to the respective pointer.
The third argument to this system call is nowadays unused (see NOTES).
The information placed in cpu is only guaranteed to be current at the time of the call: unless the CPU affinity has been fixed using
sched_setaffinity(2), the kernel might change the CPU at any time. (Normally this does not happen because the scheduler tries to minimize
movements between CPUs to keep caches hot, but it is possible.) The caller must allow for the possibility that the information returned in
cpu and node is no longer current by the time the call returns.
RETURN VALUE
On success, 0 is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
EFAULT Arguments point outside the calling process's address space.
VERSIONS
getcpu() was added in kernel 2.6.19 for x86_64 and i386.
CONFORMING TO
getcpu() is Linux specific.
NOTES
Linux makes a best effort to make this call as fast possible. The intention of getcpu() is to allow programs to make optimizations with
per-CPU data or for NUMA optimization.
Glibc does not provide a wrapper for this system call; call it using syscall(2); or use sched_getcpu(3) instead.
The tcache argument is unused since Linux 2.6.24. In earlier kernels, if this argument was non-NULL, then it specified a pointer to a
caller-allocated buffer in thread-local storage that was used to provide a caching mechanism for getcpu(). Use of the cache could speed
getcpu() calls, at the cost that there was a very small chance that the returned information would be out of date. The caching mechanism
was considered to cause problems when migrating threads between CPUs, and so the argument is now ignored.
SEE ALSO
mbind(2), sched_setaffinity(2), set_mempolicy(2), sched_getcpu(3), cpuset(7)
COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-07-13 GETCPU(2)