Adding upstream version 4.22.0.upstream/4.22.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 67 insertions, 0 deletions

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+'\" t
+.\" Copyright (c) 2015, IBM Corporation.
+.\"
+.\" SPDX-License-Identifier: Linux-man-pages-copyleft
+.\"
+.TH __ppc_yield 3 2023-10-31 "Linux man-pages 6.06"
+.SH NAME
+__ppc_yield, __ppc_mdoio, __ppc_mdoom \-
+Hint the processor to release shared resources
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.B #include <sys/platform/ppc.h>
+.P
+.B void __ppc_yield(void);
+.B void __ppc_mdoio(void);
+.B void __ppc_mdoom(void);
+.fi
+.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 ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.na
+.nh
+.BR __ppc_yield (),
+.BR __ppc_mdoio (),
+.BR __ppc_mdoom ()
+T}	Thread safety	MT-Safe
+.TE
+.SH STANDARDS
+GNU.
+.SH HISTORY
+glibc 2.18.
+.SH SEE ALSO
+.BR __ppc_set_ppr_med (3)
+.P
+.I Power ISA, Book\~II - Section\~3.2 ("or" architecture)