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.TH __PPC_YIELD 3 2015-08-05 "GNU C Library" "Linux Programmer's\
Manual"
.SH NAME
__ppc_yield, __ppc_mdoio, __ppc_mdoom \-
Hint the processor to release shared resources
.SH SYNOPSIS
.B #include <sys/platform/ppc.h>
.sp
.B void __ppc_yield(void);
.br
.B void __ppc_mdoio(void);
.br
.B void __ppc_mdoom(void);
.SH DESCRIPTION
These functions
provide hints about the usage of resources that are shared with other
processors on the Power architecture.
They can be used, for example, if a program waiting on a lock intends
to divert the shared resources to be used by other processors.
.P
.BR __ppc_yield ()
provides a hint that performance will probably be improved if shared
resources dedicated to the executing processor are released for use by
other processors.
.P
.BR __ppc_mdoio ()
provides a hint that performance will probably be improved if shared
resources dedicated to the executing processor are released until all
outstanding storage accesses to caching-inhibited storage have been
completed.
.P
.BR __ppc_mdoom ()
provides a hint that performance will probably be improved if shared
resources dedicated to the executing processor are released until all
outstanding storage accesses to cacheable storage for which the data
is not in the cache have been completed.
.SH VERSIONS
These functions first appeared in glibc in version 2.18.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.ad l
.TS
allbox;
lbw29 lb lb
l l l.
Interface	Attribute	Value
T{
.BR __ppc_yield (),
.BR __ppc_mdoio (),
.BR __ppc_mdoom ()
T}	Thread safety	MT-Safe
.TE
.ad
.SH CONFORMING TO
These functions are nonstandard GNU extensions.
.SH SEE ALSO
.BR __ppc_set_ppr_med (3)

.IR "Power ISA, Book\ II - Section\ 3.2 (""or"" architecture)"
.SH COLOPHON
This page is part of release 4.10 of the Linux
.I man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
\%https://www.kernel.org/doc/man\-pages/.