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Diffstat (limited to 'man2/sched_rr_get_interval.2')
| -rw-r--r-- | man2/sched_rr_get_interval.2 | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/man2/sched_rr_get_interval.2 b/man2/sched_rr_get_interval.2 deleted file mode 100644 index b547cf2..0000000 --- a/man2/sched_rr_get_interval.2 +++ /dev/null @@ -1,110 +0,0 @@ -.\" 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 -.\" -.TH sched_rr_get_interval 2 2023-10-31 "Linux man-pages 6.7" -.SH NAME -sched_rr_get_interval \- get the SCHED_RR interval for the named process -.SH LIBRARY -Standard C library -.RI ( libc ", " \-lc ) -.SH SYNOPSIS -.nf -.B #include <sched.h> -.P -.BI "int sched_rr_get_interval(pid_t " pid ", struct timespec *" tp ); -.fi -.SH DESCRIPTION -.BR sched_rr_get_interval () -writes into the -.BR timespec (3) -structure pointed to by -.I tp -the round-robin time quantum for the process identified by -.IR pid . -The specified process should be running under the -.B SCHED_RR -scheduling policy. -.P -If -.I pid -is zero, the time quantum for the calling process is written into -.IR *tp . -.\" FIXME . On Linux, sched_rr_get_interval() -.\" returns the timeslice for SCHED_OTHER processes -- this timeslice -.\" is influenced by the nice value. -.\" For SCHED_FIFO processes, this always returns 0. -.\" -.\" The round-robin time quantum value is not alterable under Linux -.\" 1.3.81. -.\" -.SH RETURN VALUE -On success, -.BR sched_rr_get_interval () -returns 0. -On error, \-1 is returned, and -.I errno -is set to indicate the error. -.SH ERRORS -.TP -.B EFAULT -Problem with copying information to user space. -.TP -.B EINVAL -Invalid pid. -.TP -.B ENOSYS -The system call is not yet implemented (only on rather old kernels). -.TP -.B ESRCH -Could not find a process with the ID -.IR pid . -.SH VERSIONS -.SS Linux -Linux 3.9 added -.\" commit ce0dbbbb30aee6a835511d5be446462388ba9eee -a new mechanism for adjusting (and viewing) the -.B SCHED_RR -quantum: the -.I /proc/sys/kernel/sched_rr_timeslice_ms -file exposes the quantum as a millisecond value, whose default is 100. -Writing 0 to this file resets the quantum to the default value. -.SH STANDARDS -POSIX.1-2008. -.SH HISTORY -POSIX.1-2001. -.SS Linux -POSIX does not specify any mechanism for controlling the size of the -round-robin time quantum. -Older Linux kernels provide a (nonportable) method of doing this. -The quantum can be controlled by adjusting the process's nice value (see -.BR setpriority (2)). -Assigning a negative (i.e., high) nice value results in a longer quantum; -assigning a positive (i.e., low) nice value results in a shorter quantum. -The default quantum is 0.1 seconds; -the degree to which changing the nice value affects the -quantum has varied somewhat across kernel versions. -This method of adjusting the quantum was removed -.\" commit a4ec24b48ddef1e93f7578be53270f0b95ad666c -starting with Linux 2.6.24. -.SH NOTES -POSIX systems on which -.BR sched_rr_get_interval () -is available define -.B _POSIX_PRIORITY_SCHEDULING -in -.IR <unistd.h> . -.\" .SH BUGS -.\" As of Linux 1.3.81 -.\" .BR sched_rr_get_interval () -.\" returns with error -.\" ENOSYS, because SCHED_RR has not yet been fully implemented and tested -.\" properly. -.SH SEE ALSO -.BR timespec (3), -.BR sched (7) |