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.TH "pthread_attr_setcpu_np" "3"
.SH "NAME"
pthread_attr_setcpu_np, pthread_attr_getcpu_nppthread_attr_getcpu_np \(em examine and change the CPU pthread attribute
.SH "SYNOPSIS"
.PP
.nf
.ta 8n 16n 24n 32n 40n 48n 56n 64n 72n
#include <rtl_sched.h>
int \fBpthread_attr_setcpu_np\fP(pthread_attr_t \fB*attr\fR, int \fBcpu\fR);
int \fBpthread_attr_getcpu_np\fP(pthread_attr_t \fB*attr\fR, int \fB*cpu\fR);
.fi
.SH "DESCRIPTION"
.PP
These functions are non-portable RTLinux extensions. On SMP machines they allow a thread to be scheduled on a specific CPU.
The RTLinux scheduler
does not try to guess what thread belongs to what CPU. The default
processor is the processor where a thread is created,
but RTLinux really wants the
application to tell it where to run threads.
.PP
\fBpthread_attr_setcpu_np\fP modifies the thread attribute object \fIattribute\fP so that the created thread would be scheduled on the CPU with id \fIcpu\fP (as displayed in \fI/proc/cpuinfo\fP). The thread attribute object \fIattr\fP first has to be initialized with \fBpthread_attr_init(3)\fP.
.PP
\fBpthread_attr_getcpu_np\fP fills the location pointed to by \fBcpu\fR with the CPU id from the attribute structure.
.SH "RETURN VALUE"
.PP
All functions return 0 on success and a non-zero error code on error.
.SH "ERRORS"
.PP
\fBpthread_attr_setcpu_np\fP returns \fIEINVAL\fP if the specified CPU does not exist in the system.
.SH "NOTES"
.PP
If \fBpthread_attr_setcpu_np\fP was not used on the attribute object passed to \fBpthread_create\fP, the thread is scheduled on the current CPU.
.SH "AUTHOR"
.PP
Michael Barabanov (\fIbaraban@fsmlabs.com (link to URL mailto:baraban@fsmlabs.com) \fR)
.SH "SEE ALSO"
\fIUNIX spec pthread_attr_getstacksize(3) (link to URL ../susv2/xsh/pthread_attr_getstacksize.html) \fR, \fIUNIX spec pthread_attr_setstacksize(3) (link to URL ../susv2/xsh/pthread_attr_setstacksize.html) \fR, \fIUNIX spec pthread_attr_setschedparam(3) (link to URL ../susv2/xsh/pthread_attr_setschedparam.html) \fR, \fIUNIX spec pthread_attr_init(3) (link to URL ../susv2/xsh/pthread_attr_init.html) \fR, \fIUNIX spec pthread_attr_getschedparam(3) (link to URL ../susv2/xsh/pthread_attr_getschedparam.html) \fR, \fIUNIX spec pthread_create(3) (link to URL ../susv2/xsh/pthread_create.html) \fR
.PP
\(co2001 FSMLabs Inc.
.PP
All rights reserved.
...\" created by instant / docbook-to-man, Wed 13 Jun 2001, 17:57
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