2014-05-10 18:17:44 +00:00
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.\" Copyright (C) 2014 Michael Kerrisk <mtk.manpages@gmail.com>
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.\" and Copyright (C) 2014 Peter Zijlstra <peterz@infradead.org>
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.\"
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.\" %%%LICENSE_START(VERBATIM)
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" %%%LICENSE_END
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.\"
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memusage.1, memusagestat.1, pldd.1, accept.2, adjtimex.2, arch_prctl.2, bdflush.2, bpf.2, close.2, epoll_ctl.2, epoll_wait.2, execve.2, execveat.2, fanotify_init.2, fanotify_mark.2, fcntl.2, fsync.2, get_kernel_syms.2, getdomainname.2, getgroups.2, gethostname.2, getrandom.2, getrlimit.2, getrusage.2, getsid.2, getunwind.2, io_getevents.2, ioctl_fat.2, kexec_load.2, killpg.2, listxattr.2, lseek.2, madvise.2, memfd_create.2, mknod.2, mlock.2, modify_ldt.2, msgctl.2, msgget.2, msgop.2, readlink.2, readv.2, reboot.2, recvmmsg.2, rename.2, request_key.2, restart_syscall.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, seccomp.2, select_tut.2, semctl.2, semget.2, semop.2, set_thread_area.2, seteuid.2, setgid.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigprocmask.2, stat.2, symlink.2, syscall.2, sysctl.2, unlink.2, bindresvport.3, byteorder.3, dlopen.3, endian.3, error.3, ffs.3, fmemopen.3, getcwd.3, getlogin.3, getnetent.3, getprotoent.3, getservent.3, getumask.3, getutent.3, glob.3, isalpha.3, lio_listio.3, login.3, mbsinit.3, mbstowcs.3, mbtowc.3, mkstemp.3, nextup.3, ntp_gettime.3, posix_fallocate.3, posix_spawn.3, pthread_join.3, pthread_rwlockattr_setkind_np.3, random.3, rcmd.3, realpath.3, resolver.3, setjmp.3, setnetgrent.3, sigvec.3, strerror.3, strverscmp.3, system.3, toupper.3, towlower.3, towupper.3, wcstombs.3, wordexp.3, cciss.4, loop.4, mouse.4, random.4, core.5, group.5, hosts.5, resolv.conf.5, ascii.7, environ.7, epoll.7, glob.7, ip.7, mq_overview.7, packet.7, pipe.7, raw.7, sched.7, signal.7, socket.7, symlink.7, ld.so.8, sln.8: tstamp
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-10-08 10:53:47 +00:00
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.TH SCHED_SETATTR 2 2016-10-08 "Linux" "Linux Programmer's Manual"
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2014-05-10 18:17:44 +00:00
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.SH NAME
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sched_setattr, sched_getattr \-
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set and get scheduling policy and attributes
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.SH SYNOPSIS
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.nf
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.B #include <sched.h>
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_syscall.2, clock_getres.2, clone.2, copy_file_range.2, create_module.2, delete_module.2, fallocate.2, futex.2, get_kernel_syms.2, get_robust_list.2, getcpu.2, getdents.2, gettid.2, gettimeofday.2, getunwind.2, init_module.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_userfaultfd.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, link.2, llseek.2, memfd_create.2, mmap.2, mq_getsetattr.2, msgctl.2, msgget.2, open_by_handle_at.2, outb.2, perf_event_open.2, pivot_root.2, process_vm_readv.2, query_module.2, readdir.2, recvmmsg.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_setattr.2, seccomp.2, select.2, select_tut.2, send.2, sendmmsg.2, set_thread_area.2, set_tid_address.2, sgetmask.2, shmop.2, sigaction.2, sigprocmask.2, splice.2, spu_create.2, spu_run.2, statx.2, subpage_prot.2, sync_file_range.2, syscall.2, sysctl.2, sysfs.2, tee.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, tkill.2, uselib.2, utimensat.2, vmsplice.2, wait.2, aio_init.3, asinh.3, atan2.3, atanh.3, backtrace.3, basename.3, bswap.3, bzero.3, catgets.3, catopen.3, dladdr.3, dlsym.3, endian.3, envz_add.3, erf.3, erfc.3, error.3, ferror.3, ffs.3, fgetc.3, fmemopen.3, fopen.3, fopencookie.3, fseek.3, ftw.3, futimes.3, getdate.3, getenv.3, getline.3, getlogin.3, getrpcent.3, getsubopt.3, getutmp.3, getw.3, gnu_get_libc_version.3, inet_net_pton.3, isalpha.3, lio_listio.3, makedev.3, malloc_get_state.3, malloc_stats.3, malloc_trim.3, malloc_usable_size.3, matherr.3, memchr.3, nextup.3, ntp_gettime.3, posix_madvise.3, program_invocation_name.3, pthread_atfork.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cleanup_push_defer_np.3, pthread_detach.3, pthread_equal.3, pthread_exit.3, pthread_join.3, pthread_kill.3, pthread_kill_other_threads_np.3, pthread_rwlockattr_setkind_np.3, pthread_self.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedprio.3, pthread_testcancel.3, pthread_tryjoin_np.3, pthread_yield.3, puts.3, random.3, random_r.3, rpc.3, sched_getcpu.3, setnetgrent.3, sigwait.3, stdin.3, strerror.3, strfmon.3, timeradd.3, tmpnam.3, toupper.3, towlower.3, towupper.3, ttyname.3, uselocale.3, xdr.3, dsp56k.4, sigevent.7, vdso.7: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-15 17:26:11 +00:00
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.PP
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2015-06-09 12:11:41 +00:00
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.BI "int sched_setattr(pid_t " pid ", struct sched_attr *" attr ,
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2014-05-10 18:17:44 +00:00
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.BI " unsigned int " flags );
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_syscall.2, clock_getres.2, clone.2, copy_file_range.2, create_module.2, delete_module.2, fallocate.2, futex.2, get_kernel_syms.2, get_robust_list.2, getcpu.2, getdents.2, gettid.2, gettimeofday.2, getunwind.2, init_module.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_userfaultfd.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, link.2, llseek.2, memfd_create.2, mmap.2, mq_getsetattr.2, msgctl.2, msgget.2, open_by_handle_at.2, outb.2, perf_event_open.2, pivot_root.2, process_vm_readv.2, query_module.2, readdir.2, recvmmsg.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_setattr.2, seccomp.2, select.2, select_tut.2, send.2, sendmmsg.2, set_thread_area.2, set_tid_address.2, sgetmask.2, shmop.2, sigaction.2, sigprocmask.2, splice.2, spu_create.2, spu_run.2, statx.2, subpage_prot.2, sync_file_range.2, syscall.2, sysctl.2, sysfs.2, tee.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, tkill.2, uselib.2, utimensat.2, vmsplice.2, wait.2, aio_init.3, asinh.3, atan2.3, atanh.3, backtrace.3, basename.3, bswap.3, bzero.3, catgets.3, catopen.3, dladdr.3, dlsym.3, endian.3, envz_add.3, erf.3, erfc.3, error.3, ferror.3, ffs.3, fgetc.3, fmemopen.3, fopen.3, fopencookie.3, fseek.3, ftw.3, futimes.3, getdate.3, getenv.3, getline.3, getlogin.3, getrpcent.3, getsubopt.3, getutmp.3, getw.3, gnu_get_libc_version.3, inet_net_pton.3, isalpha.3, lio_listio.3, makedev.3, malloc_get_state.3, malloc_stats.3, malloc_trim.3, malloc_usable_size.3, matherr.3, memchr.3, nextup.3, ntp_gettime.3, posix_madvise.3, program_invocation_name.3, pthread_atfork.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cleanup_push_defer_np.3, pthread_detach.3, pthread_equal.3, pthread_exit.3, pthread_join.3, pthread_kill.3, pthread_kill_other_threads_np.3, pthread_rwlockattr_setkind_np.3, pthread_self.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedprio.3, pthread_testcancel.3, pthread_tryjoin_np.3, pthread_yield.3, puts.3, random.3, random_r.3, rpc.3, sched_getcpu.3, setnetgrent.3, sigwait.3, stdin.3, strerror.3, strfmon.3, timeradd.3, tmpnam.3, toupper.3, towlower.3, towupper.3, ttyname.3, uselocale.3, xdr.3, dsp56k.4, sigevent.7, vdso.7: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-15 17:26:11 +00:00
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.PP
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2015-02-04 20:23:46 +00:00
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.BI "int sched_getattr(pid_t " pid ", struct sched_attr *" attr ,
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2014-05-10 18:17:44 +00:00
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.BI " unsigned int " size ", unsigned int " flags );
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.fi
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adjtimex.2, bind.2, cacheflush.2, clone.2, fallocate.2, fanotify_init.2, fanotify_mark.2, flock.2, futex.2, getdents.2, getpriority.2, getrlimit.2, gettid.2, gettimeofday.2, ioprio_set.2, kexec_load.2, migrate_pages.2, modify_ldt.2, mount.2, move_pages.2, mprotect.2, msgop.2, nfsservctl.2, perf_event_open.2, pread.2, ptrace.2, recvmmsg.2, rename.2, restart_syscall.2, sched_setattr.2, send.2, shmop.2, shutdown.2, sigaction.2, signalfd.2, syscalls.2, timer_create.2, timerfd_create.2, tkill.2, vmsplice.2, wait.2, aio_init.3, confstr.3, exit.3, fmemopen.3, fopen.3, getaddrinfo.3, getauxval.3, getspnam.3, isalpha.3, isatty.3, mallinfo.3, malloc.3, mallopt.3, psignal.3, pthread_attr_setinheritsched.3, qecvt.3, queue.3, rtnetlink.3, strerror.3, strftime.3, toupper.3, towlower.3, towupper.3, initrd.4, locale.5, proc.5, bootparam.7, capabilities.7, ddp.7, fanotify.7, icmp.7, inotify.7, ip.7, ipv6.7, netdevice.7, netlink.7, path_resolution.7, rtld-audit.7, rtnetlink.7, sched.7, signal.7, socket.7, svipc.7, tcp.7, unix.7, ld.so.8: srcfix: Update FIXMEs
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2014-08-21 21:47:44 +00:00
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.\" FIXME . Add feature test macro requirements
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2014-05-10 18:17:44 +00:00
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.SH DESCRIPTION
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.SS sched_setattr()
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The
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.BR sched_setattr ()
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system call sets the scheduling policy and
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associated attributes for the thread whose ID is specified in
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.IR pid .
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If
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.I pid
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equals zero,
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the scheduling policy and attributes of the calling thread will be set.
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_syscall.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2: Formatting fix: replace blank lines with .PP/.IP
Blank lines shouldn't generally appear in *roff source (other
than in code examples), since they create large vertical
spaces between text blocks.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 07:30:51 +00:00
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.PP
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2014-05-10 18:17:44 +00:00
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Currently, Linux supports the following "normal"
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(i.e., non-real-time) scheduling policies as values that may be specified in
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.IR policy :
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.TP 14
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.BR SCHED_OTHER
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the standard round-robin time-sharing policy;
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.\" In the 2.6 kernel sources, SCHED_OTHER is actually called
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.\" SCHED_NORMAL.
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.TP
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.BR SCHED_BATCH
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for "batch" style execution of processes; and
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.TP
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.BR SCHED_IDLE
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for running
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.I very
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low priority background jobs.
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.PP
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Various "real-time" policies are also supported,
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for special time-critical applications that need precise control over
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the way in which runnable threads are selected for execution.
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For the rules governing when a process may use these policies, see
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.BR sched (7).
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The real-time policies that may be specified in
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.IR policy
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are:
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.TP 14
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.BR SCHED_FIFO
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a first-in, first-out policy; and
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.TP
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.BR SCHED_RR
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a round-robin policy.
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.PP
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Linux also provides the following policy:
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.TP 14
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.B SCHED_DEADLINE
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a deadline scheduling policy; see
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.BR sched (7)
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for details.
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.PP
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The
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.I attr
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argument is a pointer to a structure that defines
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the new scheduling policy and attributes for the specified thread.
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This structure has the following form:
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_syscall.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2: Formatting fix: replace blank lines with .PP/.IP
Blank lines shouldn't generally appear in *roff source (other
than in code examples), since they create large vertical
spaces between text blocks.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 07:30:51 +00:00
|
|
|
.PP
|
2014-05-10 18:17:44 +00:00
|
|
|
.in +4n
|
execve.2, ioctl_console.2, ioctl_iflags.2, ioctl_ns.2, ioctl_userfaultfd.2, kcmp.2, kexec_load.2, keyctl.2, link.2, listxattr.2, membarrier.2, memfd_create.2, mmap.2, modify_ldt.2, mprotect.2, msgctl.2, nanosleep.2, open_by_handle_at.2, perf_event_open.2, poll.2, posix_fadvise.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, readdir.2, readv.2, recv.2, recvmmsg.2, request_key.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setscheduler.2, seccomp.2, select.2, select_tut.2, semctl.2, semop.2, send.2, sendmmsg.2, set_thread_area.2, setns.2, shmctl.2, shmget.2, sigaction.2, sigaltstack.2, signal.2, sigwaitinfo.2, stat.2, statfs.2, statx.2, sync_file_range.2, syscall.2, sysctl.2, sysinfo.2, tee.2, timer_create.2, timer_settime.2, timerfd_create.2, unshare.2, userfaultfd.2, ustat.2, utime.2, utimensat.2, vmsplice.2, wait.2, adjtime.3, aio_init.3, backtrace.3, basename.3, bswap.3, btree.3, clock_getcpuclockid.3, cmsg.3, confstr.3, dbopen.3, dl_iterate_phdr.3, dladdr.3, dlinfo.3, dlopen.3, duplocale.3, encrypt.3, end.3, endian.3, err.3, errno.3, ether_aton.3, fgetgrent.3, fgetpwent.3, fmemopen.3, frexp.3, ftime.3, fts.3, getaddrinfo.3, getaddrinfo_a.3, getdate.3, getfsent.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, getifaddrs.3, getipnodebyname.3, getmntent.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getprotoent_r.3, getpw.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent.3, getservent.3, getservent_r.3, getspnam.3, getttyent.3, glob.3, gnu_get_libc_version.3, hash.3, hsearch.3, if_nameindex.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, isalpha.3, makecontext.3, mallinfo.3, malloc_info.3, mallopt.3, matherr.3, mbstowcs.3, mcheck.3, memchr.3, mq_getattr.3, mq_open.3, mq_receive.3, mq_send.3, mtrace.3, newlocale.3, ntp_gettime.3, posix_openpt.3, printf.3, pthread_attr_init.3, pthread_attr_setschedparam.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_cleanup_push_defer_np.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, pthread_tryjoin_np.3, readdir.3, realpath.3, recno.3, regex.3, rpc.3, scanf.3, sched_getcpu.3, sem_wait.3, setaliasent.3, sigqueue.3, statvfs.3, strcat.3, strcpy.3, strftime.3, strtok.3, strtol.3, strverscmp.3, toupper.3, ttyslot.3, xdr.3, fuse.4, loop.4, rtc.4, st.4, acct.5, core.5, elf.5, slabinfo.5, aio.7, arp.7, capabilities.7, cgroup_namespaces.7, cgroups.7, ddp.7, fanotify.7, feature_test_macros.7, inode.7, inotify.7, ip.7, keyrings.7, locale.7, mount_namespaces.7, namespaces.7, netdevice.7, netlink.7, packet.7, pkeys.7, pthreads.7, sched.7, session-keyring.7, sock_diag.7, socket.7, spufs.7, udplite.7, unix.7, user_namespaces.7, vdso.7, x25.7, ld.so.8: Use consistent markup for code snippets
Change .nf/.fi to .EX/.EE
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-18 19:52:46 +00:00
|
|
|
.EX
|
2014-05-10 18:17:44 +00:00
|
|
|
struct sched_attr {
|
|
|
|
u32 size; /* Size of this structure */
|
|
|
|
u32 sched_policy; /* Policy (SCHED_*) */
|
|
|
|
u64 sched_flags; /* Flags */
|
|
|
|
s32 sched_nice; /* Nice value (SCHED_OTHER,
|
|
|
|
SCHED_BATCH) */
|
|
|
|
u32 sched_priority; /* Static priority (SCHED_FIFO,
|
|
|
|
SCHED_RR) */
|
|
|
|
/* Remaining fields are for SCHED_DEADLINE */
|
|
|
|
u64 sched_runtime;
|
|
|
|
u64 sched_deadline;
|
|
|
|
u64 sched_period;
|
|
|
|
};
|
execve.2, ioctl_console.2, ioctl_iflags.2, ioctl_ns.2, ioctl_userfaultfd.2, kcmp.2, kexec_load.2, keyctl.2, link.2, listxattr.2, membarrier.2, memfd_create.2, mmap.2, modify_ldt.2, mprotect.2, msgctl.2, nanosleep.2, open_by_handle_at.2, perf_event_open.2, poll.2, posix_fadvise.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, readdir.2, readv.2, recv.2, recvmmsg.2, request_key.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setscheduler.2, seccomp.2, select.2, select_tut.2, semctl.2, semop.2, send.2, sendmmsg.2, set_thread_area.2, setns.2, shmctl.2, shmget.2, sigaction.2, sigaltstack.2, signal.2, sigwaitinfo.2, stat.2, statfs.2, statx.2, sync_file_range.2, syscall.2, sysctl.2, sysinfo.2, tee.2, timer_create.2, timer_settime.2, timerfd_create.2, unshare.2, userfaultfd.2, ustat.2, utime.2, utimensat.2, vmsplice.2, wait.2, adjtime.3, aio_init.3, backtrace.3, basename.3, bswap.3, btree.3, clock_getcpuclockid.3, cmsg.3, confstr.3, dbopen.3, dl_iterate_phdr.3, dladdr.3, dlinfo.3, dlopen.3, duplocale.3, encrypt.3, end.3, endian.3, err.3, errno.3, ether_aton.3, fgetgrent.3, fgetpwent.3, fmemopen.3, frexp.3, ftime.3, fts.3, getaddrinfo.3, getaddrinfo_a.3, getdate.3, getfsent.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, getifaddrs.3, getipnodebyname.3, getmntent.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getprotoent_r.3, getpw.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent.3, getservent.3, getservent_r.3, getspnam.3, getttyent.3, glob.3, gnu_get_libc_version.3, hash.3, hsearch.3, if_nameindex.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, isalpha.3, makecontext.3, mallinfo.3, malloc_info.3, mallopt.3, matherr.3, mbstowcs.3, mcheck.3, memchr.3, mq_getattr.3, mq_open.3, mq_receive.3, mq_send.3, mtrace.3, newlocale.3, ntp_gettime.3, posix_openpt.3, printf.3, pthread_attr_init.3, pthread_attr_setschedparam.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_cleanup_push_defer_np.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, pthread_tryjoin_np.3, readdir.3, realpath.3, recno.3, regex.3, rpc.3, scanf.3, sched_getcpu.3, sem_wait.3, setaliasent.3, sigqueue.3, statvfs.3, strcat.3, strcpy.3, strftime.3, strtok.3, strtol.3, strverscmp.3, toupper.3, ttyslot.3, xdr.3, fuse.4, loop.4, rtc.4, st.4, acct.5, core.5, elf.5, slabinfo.5, aio.7, arp.7, capabilities.7, cgroup_namespaces.7, cgroups.7, ddp.7, fanotify.7, feature_test_macros.7, inode.7, inotify.7, ip.7, keyrings.7, locale.7, mount_namespaces.7, namespaces.7, netdevice.7, netlink.7, packet.7, pkeys.7, pthreads.7, sched.7, session-keyring.7, sock_diag.7, socket.7, spufs.7, udplite.7, unix.7, user_namespaces.7, vdso.7, x25.7, ld.so.8: Use consistent markup for code snippets
Change .nf/.fi to .EX/.EE
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-18 19:52:46 +00:00
|
|
|
.EE
|
2014-05-10 18:17:44 +00:00
|
|
|
.in
|
_syscall.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2: Formatting fix: replace blank lines with .PP/.IP
Blank lines shouldn't generally appear in *roff source (other
than in code examples), since they create large vertical
spaces between text blocks.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 07:30:51 +00:00
|
|
|
.PP
|
2014-05-10 18:17:44 +00:00
|
|
|
The fields of this structure are as follows:
|
|
|
|
.TP
|
|
|
|
.B size
|
|
|
|
This field should be set to the size of the structure in bytes, as in
|
|
|
|
.IR "sizeof(struct sched_attr)" .
|
|
|
|
If the provided structure is smaller than the kernel structure,
|
|
|
|
any additional fields are assumed to be '0'.
|
|
|
|
If the provided structure is larger than the kernel structure,
|
|
|
|
the kernel verifies that all additional fields are 0;
|
|
|
|
if they are not,
|
|
|
|
.BR sched_setattr ()
|
|
|
|
fails with the error
|
|
|
|
.BR E2BIG
|
|
|
|
and updates
|
|
|
|
.I size
|
|
|
|
to contain the size of the kernel structure.
|
|
|
|
.IP
|
|
|
|
The above behavior when the size of the user-space
|
|
|
|
.I sched_attr
|
|
|
|
structure does not match the size of the kernel structure
|
|
|
|
allows for future extensibility of the interface.
|
|
|
|
Malformed applications that pass oversize structures
|
|
|
|
won't break in the future if the size of the kernel
|
|
|
|
.I sched_attr
|
|
|
|
structure is increased.
|
|
|
|
In the future,
|
|
|
|
it could also allow applications that know about a larger user-space
|
|
|
|
.I sched_attr
|
|
|
|
structure to determine whether they are running on an older kernel
|
|
|
|
that does not support the larger structure.
|
|
|
|
.TP
|
|
|
|
.I sched_policy
|
|
|
|
This field specifies the scheduling policy, as one of the
|
|
|
|
.BR SCHED_*
|
|
|
|
values listed above.
|
|
|
|
.TP
|
|
|
|
.I sched_flags
|
|
|
|
This field contains flags controlling scheduling behavior.
|
|
|
|
Only one such flag is currently defined:
|
|
|
|
.BR SCHED_FLAG_RESET_ON_FORK .
|
|
|
|
As a result of including this flag, children created by
|
|
|
|
.BR fork (2)
|
|
|
|
do not inherit privileged scheduling policies.
|
|
|
|
See
|
|
|
|
.BR sched (7)
|
|
|
|
for details.
|
|
|
|
.TP
|
|
|
|
.I sched_nice
|
|
|
|
This field specifies the nice value to be set when specifying
|
|
|
|
.IR sched_policy
|
|
|
|
as
|
|
|
|
.BR SCHED_OTHER
|
|
|
|
or
|
|
|
|
.BR SCHED_BATCH .
|
|
|
|
The nice value is a number in the range \-20 (high priority)
|
|
|
|
to +19 (low priority); see
|
2016-11-27 15:40:02 +00:00
|
|
|
.BR sched (7).
|
2014-05-10 18:17:44 +00:00
|
|
|
.TP
|
|
|
|
.I sched_priority
|
|
|
|
This field specifies the static priority to be set when specifying
|
|
|
|
.IR sched_policy
|
|
|
|
as
|
|
|
|
.BR SCHED_FIFO
|
|
|
|
or
|
|
|
|
.BR SCHED_RR .
|
|
|
|
The allowed range of priorities for these policies can be determined using
|
|
|
|
.BR sched_get_priority_min (2)
|
|
|
|
and
|
|
|
|
.BR sched_get_priority_max (2).
|
|
|
|
For other policies, this field must be specified as 0.
|
|
|
|
.TP
|
|
|
|
.I sched_runtime
|
|
|
|
This field specifies the "Runtime" parameter for deadline scheduling.
|
|
|
|
The value is expressed in nanoseconds.
|
|
|
|
This field, and the next two fields,
|
|
|
|
are used only for
|
2014-05-21 11:16:14 +00:00
|
|
|
.BR SCHED_DEADLINE
|
2014-05-10 18:17:44 +00:00
|
|
|
scheduling; for further details, see
|
|
|
|
.BR sched (7).
|
|
|
|
.TP
|
|
|
|
.I sched_deadline
|
|
|
|
This field specifies the "Deadline" parameter for deadline scheduling.
|
|
|
|
The value is expressed in nanoseconds.
|
|
|
|
.TP
|
|
|
|
.I sched_period
|
|
|
|
This field specifies the "Period" parameter for deadline scheduling.
|
|
|
|
The value is expressed in nanoseconds.
|
|
|
|
.PP
|
|
|
|
The
|
|
|
|
.I flags
|
|
|
|
argument is provided to allow for future extensions to the interface;
|
|
|
|
in the current implementation it must be specified as 0.
|
|
|
|
.\"
|
|
|
|
.\"
|
|
|
|
.SS sched_getattr()
|
|
|
|
The
|
|
|
|
.BR sched_getattr ()
|
|
|
|
system call fetches the scheduling policy and the
|
|
|
|
associated attributes for the thread whose ID is specified in
|
|
|
|
.IR pid .
|
|
|
|
If
|
|
|
|
.I pid
|
|
|
|
equals zero,
|
|
|
|
the scheduling policy and attributes of the calling thread
|
|
|
|
will be retrieved.
|
_syscall.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2: Formatting fix: replace blank lines with .PP/.IP
Blank lines shouldn't generally appear in *roff source (other
than in code examples), since they create large vertical
spaces between text blocks.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 07:30:51 +00:00
|
|
|
.PP
|
2014-05-10 18:17:44 +00:00
|
|
|
The
|
|
|
|
.I size
|
|
|
|
argument should be set to the size of the
|
|
|
|
.I sched_attr
|
|
|
|
structure as known to user space.
|
|
|
|
The value must be at least as large as the size of the initially published
|
|
|
|
.I sched_attr
|
|
|
|
structure, or the call fails with the error
|
|
|
|
.BR EINVAL .
|
_syscall.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2: Formatting fix: replace blank lines with .PP/.IP
Blank lines shouldn't generally appear in *roff source (other
than in code examples), since they create large vertical
spaces between text blocks.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 07:30:51 +00:00
|
|
|
.PP
|
2014-05-10 18:17:44 +00:00
|
|
|
The retrieved scheduling attributes are placed in the fields of the
|
|
|
|
.I sched_attr
|
|
|
|
structure pointed to by
|
|
|
|
.IR attr .
|
|
|
|
The kernel sets
|
|
|
|
.I attr.size
|
|
|
|
to the size of its
|
|
|
|
.I sched_attr
|
|
|
|
structure.
|
_syscall.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2: Formatting fix: replace blank lines with .PP/.IP
Blank lines shouldn't generally appear in *roff source (other
than in code examples), since they create large vertical
spaces between text blocks.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 07:30:51 +00:00
|
|
|
.PP
|
2014-05-10 18:17:44 +00:00
|
|
|
If the caller-provided
|
|
|
|
.I attr
|
|
|
|
buffer is larger than the kernel's
|
|
|
|
.I sched_attr
|
|
|
|
structure,
|
|
|
|
the additional bytes in the user-space structure are not touched.
|
|
|
|
If the caller-provided structure is smaller than the kernel
|
|
|
|
.I sched_attr
|
|
|
|
structure and the kernel needs to return values outside the provided space,
|
|
|
|
.BR sched_getattr ()
|
|
|
|
fails with the error
|
|
|
|
.BR E2BIG .
|
|
|
|
As with
|
|
|
|
.BR sched_setattr (),
|
|
|
|
these semantics allow for future extensibility of the interface.
|
_syscall.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2: Formatting fix: replace blank lines with .PP/.IP
Blank lines shouldn't generally appear in *roff source (other
than in code examples), since they create large vertical
spaces between text blocks.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 07:30:51 +00:00
|
|
|
.PP
|
2014-05-10 18:17:44 +00:00
|
|
|
The
|
|
|
|
.I flags
|
|
|
|
argument is provided to allow for future extensions to the interface;
|
|
|
|
in the current implementation it must be specified as 0.
|
|
|
|
.SH RETURN VALUE
|
|
|
|
On success,
|
|
|
|
.BR sched_setattr ()
|
|
|
|
and
|
|
|
|
.BR sched_getattr ()
|
|
|
|
return 0.
|
|
|
|
On error, \-1 is returned, and
|
|
|
|
.I errno
|
|
|
|
is set to indicate the cause of the error.
|
|
|
|
.SH ERRORS
|
|
|
|
.BR sched_getattr ()
|
|
|
|
and
|
|
|
|
.BR sched_setattr ()
|
|
|
|
can both fail for the following reasons:
|
|
|
|
.TP
|
|
|
|
.B EINVAL
|
|
|
|
.I attr
|
|
|
|
is NULL; or
|
|
|
|
.I pid
|
|
|
|
is negative; or
|
|
|
|
.I flags
|
|
|
|
is not zero.
|
|
|
|
.TP
|
|
|
|
.B ESRCH
|
|
|
|
The thread whose ID is
|
|
|
|
.I pid
|
|
|
|
could not be found.
|
|
|
|
.PP
|
|
|
|
In addition,
|
|
|
|
.BR sched_getattr ()
|
|
|
|
can fail for the following reasons:
|
|
|
|
.TP
|
|
|
|
.B E2BIG
|
|
|
|
The buffer specified by
|
|
|
|
.I size
|
|
|
|
and
|
|
|
|
.I attr
|
|
|
|
is too small.
|
|
|
|
.TP
|
|
|
|
.B EINVAL
|
|
|
|
.I size
|
|
|
|
is invalid; that is, it is smaller than the initial version of the
|
|
|
|
.I sched_attr
|
|
|
|
structure (48 bytes) or larger than the system page size.
|
|
|
|
.PP
|
|
|
|
In addition,
|
|
|
|
.BR sched_setattr ()
|
|
|
|
can fail for the following reasons:
|
|
|
|
.TP
|
|
|
|
.B E2BIG
|
|
|
|
The buffer specified by
|
|
|
|
.I size
|
|
|
|
and
|
|
|
|
.I attr
|
|
|
|
is larger than the kernel structure,
|
|
|
|
and one or more of the excess bytes is nonzero.
|
|
|
|
.TP
|
|
|
|
.B EBUSY
|
|
|
|
.B SCHED_DEADLINE
|
|
|
|
admission control failure, see
|
|
|
|
.BR sched (7).
|
|
|
|
.TP
|
|
|
|
.B EINVAL
|
|
|
|
.I attr.sched_policy
|
|
|
|
is not one of the recognized policies;
|
|
|
|
.I attr.sched_flags
|
|
|
|
contains a flag other than
|
|
|
|
.BR SCHED_FLAG_RESET_ON_FORK ;
|
|
|
|
or
|
|
|
|
.I attr.sched_priority
|
|
|
|
is invalid; or
|
|
|
|
.I attr.sched_policy
|
|
|
|
is
|
|
|
|
.BR SCHED_DEADLINE
|
|
|
|
and the deadline scheduling parameters in
|
|
|
|
.I attr
|
|
|
|
are invalid.
|
|
|
|
.TP
|
|
|
|
.B EPERM
|
|
|
|
The caller does not have appropriate privileges.
|
|
|
|
.TP
|
|
|
|
.B EPERM
|
2016-01-08 20:26:50 +00:00
|
|
|
The CPU affinity mask of the thread specified by
|
|
|
|
.I pid
|
2014-05-10 18:17:44 +00:00
|
|
|
does not include all CPUs in the system
|
|
|
|
(see
|
|
|
|
.BR sched_setaffinity (2)).
|
|
|
|
.SH VERSIONS
|
|
|
|
These system calls first appeared in Linux 3.14.
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adjtimex.2, bind.2, cacheflush.2, clone.2, fallocate.2, fanotify_init.2, fanotify_mark.2, flock.2, futex.2, getdents.2, getpriority.2, getrlimit.2, gettid.2, gettimeofday.2, ioprio_set.2, kexec_load.2, migrate_pages.2, modify_ldt.2, mount.2, move_pages.2, mprotect.2, msgop.2, nfsservctl.2, perf_event_open.2, pread.2, ptrace.2, recvmmsg.2, rename.2, restart_syscall.2, sched_setattr.2, send.2, shmop.2, shutdown.2, sigaction.2, signalfd.2, syscalls.2, timer_create.2, timerfd_create.2, tkill.2, vmsplice.2, wait.2, aio_init.3, confstr.3, exit.3, fmemopen.3, fopen.3, getaddrinfo.3, getauxval.3, getspnam.3, isalpha.3, isatty.3, mallinfo.3, malloc.3, mallopt.3, psignal.3, pthread_attr_setinheritsched.3, qecvt.3, queue.3, rtnetlink.3, strerror.3, strftime.3, toupper.3, towlower.3, towupper.3, initrd.4, locale.5, proc.5, bootparam.7, capabilities.7, ddp.7, fanotify.7, icmp.7, inotify.7, ip.7, ipv6.7, netdevice.7, netlink.7, path_resolution.7, rtld-audit.7, rtnetlink.7, sched.7, signal.7, socket.7, svipc.7, tcp.7, unix.7, ld.so.8: srcfix: Update FIXMEs
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2014-08-21 21:47:44 +00:00
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.\" FIXME . Add glibc version
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2014-05-10 18:17:44 +00:00
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.SH CONFORMING TO
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These system calls are nonstandard Linux extensions.
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.SH NOTES
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.BR sched_setattr ()
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provides a superset of the functionality of
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.BR sched_setscheduler (2),
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.BR sched_setparam (2),
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.BR nice (2),
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and (other than the ability to set the priority of all processes
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belonging to a specified user or all processes in a specified group)
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.BR setpriority (2).
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Analogously,
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2015-01-16 06:55:31 +00:00
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.BR sched_getattr ()
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2014-05-10 18:17:44 +00:00
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provides a superset of the functionality of
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.BR sched_getscheduler (2),
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.BR sched_getparam (2),
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and (partially)
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.BR getpriority (2).
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.SH BUGS
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In Linux versions up to
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adjtimex.2, bind.2, cacheflush.2, clone.2, fallocate.2, fanotify_init.2, fanotify_mark.2, flock.2, futex.2, getdents.2, getpriority.2, getrlimit.2, gettid.2, gettimeofday.2, ioprio_set.2, kexec_load.2, migrate_pages.2, modify_ldt.2, mount.2, move_pages.2, mprotect.2, msgop.2, nfsservctl.2, perf_event_open.2, pread.2, ptrace.2, recvmmsg.2, rename.2, restart_syscall.2, sched_setattr.2, send.2, shmop.2, shutdown.2, sigaction.2, signalfd.2, syscalls.2, timer_create.2, timerfd_create.2, tkill.2, vmsplice.2, wait.2, aio_init.3, confstr.3, exit.3, fmemopen.3, fopen.3, getaddrinfo.3, getauxval.3, getspnam.3, isalpha.3, isatty.3, mallinfo.3, malloc.3, mallopt.3, psignal.3, pthread_attr_setinheritsched.3, qecvt.3, queue.3, rtnetlink.3, strerror.3, strftime.3, toupper.3, towlower.3, towupper.3, initrd.4, locale.5, proc.5, bootparam.7, capabilities.7, ddp.7, fanotify.7, icmp.7, inotify.7, ip.7, ipv6.7, netdevice.7, netlink.7, path_resolution.7, rtld-audit.7, rtnetlink.7, sched.7, signal.7, socket.7, svipc.7, tcp.7, unix.7, ld.so.8: srcfix: Update FIXMEs
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2014-08-21 21:47:44 +00:00
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.\" FIXME . patch sent to Peter Zijlstra
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2014-05-10 18:17:44 +00:00
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3.15,
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.BR sched_settattr ()
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failed with the error
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.BR EFAULT
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instead of
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.BR E2BIG
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for the case described in ERRORS.
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.\" In Linux versions up to up 3.15,
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adjtimex.2, bind.2, cacheflush.2, clone.2, fallocate.2, fanotify_init.2, fanotify_mark.2, flock.2, futex.2, getdents.2, getpriority.2, getrlimit.2, gettid.2, gettimeofday.2, ioprio_set.2, kexec_load.2, migrate_pages.2, modify_ldt.2, mount.2, move_pages.2, mprotect.2, msgop.2, nfsservctl.2, perf_event_open.2, pread.2, ptrace.2, recvmmsg.2, rename.2, restart_syscall.2, sched_setattr.2, send.2, shmop.2, shutdown.2, sigaction.2, signalfd.2, syscalls.2, timer_create.2, timerfd_create.2, tkill.2, vmsplice.2, wait.2, aio_init.3, confstr.3, exit.3, fmemopen.3, fopen.3, getaddrinfo.3, getauxval.3, getspnam.3, isalpha.3, isatty.3, mallinfo.3, malloc.3, mallopt.3, psignal.3, pthread_attr_setinheritsched.3, qecvt.3, queue.3, rtnetlink.3, strerror.3, strftime.3, toupper.3, towlower.3, towupper.3, initrd.4, locale.5, proc.5, bootparam.7, capabilities.7, ddp.7, fanotify.7, icmp.7, inotify.7, ip.7, ipv6.7, netdevice.7, netlink.7, path_resolution.7, rtld-audit.7, rtnetlink.7, sched.7, signal.7, socket.7, svipc.7, tcp.7, unix.7, ld.so.8: srcfix: Update FIXMEs
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2014-08-21 21:47:44 +00:00
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.\" FIXME . patch from Peter Zijlstra pending
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2014-05-10 18:17:44 +00:00
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.\" .BR sched_setattr ()
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.\" allowed a negative
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.\" .I attr.sched_policy
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.\" value.
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.SH SEE ALSO
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.ad l
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.nh
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2014-09-15 09:08:18 +00:00
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.BR chrt (1),
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2014-05-10 18:17:44 +00:00
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.BR nice (2),
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.BR sched_get_priority_max (2),
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.BR sched_get_priority_min (2),
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.BR sched_getaffinity (2),
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.BR sched_getparam (2),
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2016-08-07 18:23:24 +00:00
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.BR sched_getscheduler (2),
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2014-05-10 18:17:44 +00:00
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.BR sched_rr_get_interval (2),
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.BR sched_setaffinity (2),
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.BR sched_setparam (2),
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2016-08-07 18:23:24 +00:00
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.BR sched_setscheduler (2),
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2014-05-10 18:17:44 +00:00
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.BR sched_yield (2),
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.BR setpriority (2),
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.BR pthread_getschedparam (3),
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.BR pthread_setschedparam (3),
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.BR pthread_setschedprio (3),
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.BR capabilities (7),
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.BR cpuset (7),
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.BR sched (7)
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.ad
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