sched_get_priority

<html> <head> <title>sched_get_priority_min</title> <META NAME="KEYWORDS" CONTENT="sched_get_priority_min"> </head> <body BGCOLOR="#ffffff" LINK="#0000ff" VLINK="#0000ff" ALINK="#0000ff" TEXT="#000000"> <center> <h1>sched_get_priority_min</h1></center> <PRE> <A HREF="/man2/SCHED_GET_PRIORITY_MAX">SCHED_GET_PRIORITY_MAX(2)</A> Linux Programmer's Manual <A HREF="/man2/SCHED_GET_PRIORITY_MAX">SCHED_GET_PRIORITY_MAX(2)</A> NAME sched_get_priority_max, sched_get_priority_min - get static priority range SYNOPSIS #include <sched.h> int sched_get_priority_max(int policy); int sched_get_priority_min(int policy); DESCRIPTION sched_get_priority_max() returns the maximum priority value that can be used with the scheduling algorithm identified by policy. sched_get_priority_min() returns the minimum priority value that can be used with the scheduling algorithm identified by policy. Supported policy values are SCHED_FIFO, SCHED_RR, SCHED_OTHER, SCHED_BATCH, SCHED_IDLE, and SCHED_DEADLINE. Further details about these policies can be found in <A HREF="/man7/sched">sched(7)</A>. Processes with numerically higher priority values are scheduled before processes with numerically lower priority values. Thus, the value re- turned by sched_get_priority_max() will be greater than the value re- turned by sched_get_priority_min(). Linux allows the static priority range 1 to 99 for the SCHED_FIFO and SCHED_RR policies, and the priority 0 for the remaining policies. Scheduling priority ranges for the various policies are not alterable. The range of scheduling priorities may vary on other POSIX systems, thus it is a good idea for portable applications to use a virtual pri- ority range and map it to the interval given by sched_get_prior- ity_max() and sched_get_priority_min POSIX.1 requires a spread of at least 32 between the maximum and the minimum values for SCHED_FIFO and SCHED_RR. POSIX systems on which sched_get_priority_max() and sched_get_prior- ity_min() are available define _POSIX_PRIORITY_SCHEDULING in <unistd.h>. RETURN VALUE On success, sched_get_priority_max() and sched_get_priority_min() re- turn the maximum/minimum priority value for the named scheduling pol- icy. On error, -1 is returned, and errno is set appropriately. ERRORS EINVAL The argument policy does not identify a defined scheduling pol- icy. CONFORMING TO POSIX.1-2001, POSIX.1-2008. SEE ALSO <A HREF="/man2/sched_getaffinity">sched_getaffinity(2)</A>, <A HREF="/man2/sched_getparam">sched_getparam(2)</A>, <A HREF="/man2/sched_getscheduler">sched_getscheduler(2)</A>, <A HREF="/man2/sched_setaffinity">sched_setaffinity(2)</A>, <A HREF="/man2/sched_setparam">sched_setparam(2)</A>, <A HREF="/man2/sched_setscheduler">sched_setscheduler(2)</A>, <A HREF="/man7/sched">sched(7)</A> COLOPHON This page is part of release 5.05 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. Linux 2017-09-15 <A HREF="/man2/SCHED_GET_PRIORITY_MAX">SCHED_GET_PRIORITY_MAX(2)</A></PRE> <center> <h6>Man Pages Copyright Respective Owners. Site Copyright (C) 1994 - 2025 <a href="http://www.he.net">Hurricane Electric</a>. All Rights Reserved.</h6></center> </body> </html>

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sched_get_priority_min