NICE(2) Linux Programmer's Manual NICE(2)NAME
nice - change process priority
SYNOPSIS
#include <unistd.h>
int nice(int inc);
DESCRIPTION
nice adds inc to the nice value for the calling pid. (A large nice value means a low priority.) Only the superuser may specify a negative
increment, or priority increase.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
EPERM A non-super user attempts to do a priority increase by supplying a negative inc.
CONFORMING TO
SVr4, SVID EXT, AT&T, X/OPEN, BSD 4.3. However, the Linux and glibc (earlier than glibc 2.2.4) return value is nonstandard, see below.
SVr4 documents an additional EINVAL error code.
NOTES
Note that the routine is documented in SUSv2 to return the new nice value, while the Linux syscall and (g)libc (earlier than glibc 2.2.4)
routines return 0 on success. The new nice value can be found using getpriority(2). Note that an implementation in which nice returns the
new nice value can legitimately return -1. To reliably detect an error, set errno to 0 before the call, and check its value when nice
returns -1.
SEE ALSO nice(1), getpriority(2), setpriority(2), fork(2), renice(8)Linux 2001-06-04 NICE(2)
Check Out this Related Man Page
NICE(3) BSD Library Functions Manual NICE(3)NAME
nice -- set program scheduling priority
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
nice(int incr);
DESCRIPTION
This interface is obsoleted by setpriority(2).
The nice() function obtains the scheduling priority of the process from the system and sets it to the priority value specified in incr. The
priority is a value in the range -20 to 20. The default priority is 0; lower priorities cause more favorable scheduling. Only a process
with appropriate privileges may lower priorities.
Children inherit the priority of their parent processes via fork(2).
RETURN VALUES
Upon successful completion, nice() returns the new nice value minus NZERO. Otherwise, -1 is returned, the process' nice value is not
changed, and errno is set to indicate the error.
ERRORS
The nice() function will fail if:
[EPERM] The incr argument is negative and the caller does not have appropriate privileges.
SEE ALSO nice(1), fork(2), setpriority(2), renice(8)STANDARDS
The nice() function conforms to X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'').
HISTORY
A nice() syscall appeared in Version 6 AT&T UNIX.
BSD April 30, 2011 BSD
i read a book about this a couple of times and i still find it confusing.
they talking about when you increase a priority number, that decreases nice number. I really dont understand this.
I'm working on a solaris and linux red hat 7.2 system.
if anyone can explain this stuff to me in... (3 Replies)
Anyone know where you can purchase a 5.1 cd set? IBM no longer ships this out and do not have a set. I have a burned copy, but would be nice to have the originals. I'd like to send my copies offsite for DR once i get an original set.
Thanks! (2 Replies)
Hi I want to implement the nice command in the shell that I am building. I came to know that there is a corresponding nice() system call for the same. But since I will be forking different processes to run different commands typed on the command prompt, is there any way I can make a command... (2 Replies)
Hi Guys
I have a cool job to do and that's to destroy aix5.1 on two of my servers. I need to get rid of all information. I have thought of a way of doing this and wondered if any of you had any ideas!!
Get the machine into maint mode and run the dd cmd! (7 Replies)
Hi Everyone , have a nice
i would need a little help on this
i have file which contains blocks such as given below
<hgsdp:msisdn=923228719047,loc;
HLR SUBSCRIBER DATA
SUBSCRIBER IDENTITY
MSISDN IMSI STATE AUTHD
923228719047 410072110070614 CONNECTED ... (3 Replies)
Hi,
I have two identical 12 CPU HPUX machines, and I run the same processes on each that load the boxes fully.
top on one reports activity under the NICE (19%) and SYS (18%) columns, while top on the other reports 0% NICE and 16% SYS. What would cause NICE to be zero on one machine and not... (5 Replies)
Hi there, i'm trying to find the implementation code for the system call nice().
Since it's a system call i'm having problems finding where it would be? is it in the linux kernel directory somewhere?
I would assume it would be a file called nice.c or something like this.
Thanks in advance! (2 Replies)
Hey!
This is my first post on this forum, nice to meet ya!
I've been using Linux for a good few years, I grew up using DOS and a few similar CLI-based OS's so I'm fairly okay with navigating my way around the terminal. Recently I decided I wanted to become a sysadmin so I've been teaching... (3 Replies)
Guys,
I need some advice on how to check a string, which may or may not have a entry.. Never really worked out how to do this.. May be a good time to learn now.
This is what i am trying to do
Run a command, to return a string
If the string is not empty , then run the if statement,... (4 Replies)
I wonder if anyone could assist with some problems I'm having with Linux Capabilities and their use when using the commands "nice" and "schedtool".
I run a couple of PCs, one is an elderly AMD Sempron 2800+ (32-bit, 2GHz clock and 3GB memory) that is used as a family multimedia system running... (3 Replies)
Running 2 VM Guests on an HPUX Integrity Server. One Guest runs great, the other is always at a high NICE value and 0% idle as shown in TOP:
What do you think should be tuned to bring down the NICE and increase IDLE %? Thanks in advance
-hpuxadmin
slow VM GUEST
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Is it possible to set a nice value for an executable in a script so that every time the executable runs it has this nice value?
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