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sched_setscheduler.2: Scheduling policy and parameters are per-thread on Linux 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2013-02-03 06:19:05 +01:00
parent 76006a4ae0
commit d59995118d
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man2/sched_setscheduler.2
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@ -453,6 +453,29 @@ and details vary across systems.
For example, the Solaris 7 manual page says that
the real or effective user ID of the calling process must
match the real user ID or the save set-user-ID of the target process.
.PP
The scheduling policy and parameters are in fact per-thread
attributes on Linux.
The value returned from a call to
.BR gettid (2)
can be passed in the argument
.IR pid .
Specifying
.I pid
as 0 will operate on the attribute for the calling thread,
and passing the value returned from a call to
.BR getpid (2)
will operate on the attribute for the main thread of the thread group.
(If you are using the POSIX threads API, then use
.BR pthread_setschedparam (3),
.BR pthread_getschedparam (3),
and
.BR pthread_setschedprio (3),
instead of the
.BR sched_* (2)
system calls.)
.PP
Originally, Standard Linux was intended as a general-purpose operating
system being able to handle background processes, interactive