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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
commit | 399644e47874bff147afb19c89228901ac39340e (patch) | |
tree | 1c4c0b733f4c16b5783b41bebb19194a9ef62ad1 /man2/sched_setparam.2 | |
parent | Initial commit. (diff) | |
download | manpages-399644e47874bff147afb19c89228901ac39340e.tar.xz manpages-399644e47874bff147afb19c89228901ac39340e.zip |
Adding upstream version 6.05.01.upstream/6.05.01
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man2/sched_setparam.2')
-rw-r--r-- | man2/sched_setparam.2 | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/man2/sched_setparam.2 b/man2/sched_setparam.2 new file mode 100644 index 0000000..f054f5d --- /dev/null +++ b/man2/sched_setparam.2 @@ -0,0 +1,121 @@ +.\" Copyright (C) Tom Bjorkholm & Markus Kuhn, 1996 +.\" +.\" SPDX-License-Identifier: GPL-2.0-or-later +.\" +.\" 1996-04-01 Tom Bjorkholm <tomb@mydata.se> +.\" First version written +.\" 1996-04-10 Markus Kuhn <mskuhn@cip.informatik.uni-erlangen.de> +.\" revision +.\" Modified 2004-05-27 by Michael Kerrisk <mtk.manpages@gmail.com> +.\" +.TH sched_setparam 2 2023-03-30 "Linux man-pages 6.05.01" +.SH NAME +sched_setparam, sched_getparam \- set and get scheduling parameters +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include <sched.h> +.PP +.BI "int sched_setparam(pid_t " pid ", const struct sched_param *" param ); +.BI "int sched_getparam(pid_t " pid ", struct sched_param *" param ); +.PP +\fBstruct sched_param { + ... + int \fIsched_priority\fB; + ... +}; +.fi +.SH DESCRIPTION +.BR sched_setparam () +sets the scheduling parameters associated with the scheduling policy +for the thread whose thread ID is specified in \fIpid\fP. +If \fIpid\fP is zero, then +the parameters of the calling thread are set. +The interpretation of +the argument \fIparam\fP depends on the scheduling +policy of the thread identified by +.IR pid . +See +.BR sched (7) +for a description of the scheduling policies supported under Linux. +.PP +.BR sched_getparam () +retrieves the scheduling parameters for the +thread identified by \fIpid\fP. +If \fIpid\fP is zero, then the parameters +of the calling thread are retrieved. +.PP +.BR sched_setparam () +checks the validity of \fIparam\fP for the scheduling policy of the +thread. +The value \fIparam\->sched_priority\fP must lie within the +range given by +.BR sched_get_priority_min (2) +and +.BR sched_get_priority_max (2). +.PP +For a discussion of the privileges and resource limits related to +scheduling priority and policy, see +.BR sched (7). +.PP +POSIX systems on which +.BR sched_setparam () +and +.BR sched_getparam () +are available define +.B _POSIX_PRIORITY_SCHEDULING +in \fI<unistd.h>\fP. +.SH RETURN VALUE +On success, +.BR sched_setparam () +and +.BR sched_getparam () +return 0. +On error, \-1 is returned, and +.I errno +is set to indicate the error. +.SH ERRORS +.TP +.B EINVAL +Invalid arguments: +.I param +is NULL or +.I pid +is negative +.TP +.B EINVAL +.RB ( sched_setparam ()) +The argument \fIparam\fP does not make sense for the current +scheduling policy. +.TP +.B EPERM +.RB ( sched_setparam ()) +The caller does not have appropriate privileges +(Linux: does not have the +.B CAP_SYS_NICE +capability). +.TP +.B ESRCH +The thread whose ID is \fIpid\fP could not be found. +.SH STANDARDS +POSIX.1-2008. +.SH HISTORY +POSIX.1-2001. +.SH SEE ALSO +.ad l +.nh +.BR getpriority (2), +.BR gettid (2), +.BR nice (2), +.BR sched_get_priority_max (2), +.BR sched_get_priority_min (2), +.BR sched_getaffinity (2), +.BR sched_getscheduler (2), +.BR sched_setaffinity (2), +.BR sched_setattr (2), +.BR sched_setscheduler (2), +.BR setpriority (2), +.BR capabilities (7), +.BR sched (7) |