Re: [PATCH 2/2] __ppc_set_ppr_low.3: Document new glibc function

["Michael Kerrisk (man-pages)" <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Hello Gabriel,

On 08/05/2015 09:29 PM, Gabriel F. T. Gomes wrote:
> GNU C Library 2.18 adds functions that provide access to the Program
> Priority Register (PPR).

I applied this patch. See comment below.

> Signed-off-by: Gabriel F. T. Gomes <gftg-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
> ---
>  man3/__ppc_set_ppr_low.3     |  1 +
>  man3/__ppc_set_ppr_med.3     | 96 ++++++++++++++++++++++++++++++++++++++++++++
>  man3/__ppc_set_ppr_med_low.3 |  1 +
>  3 files changed, 98 insertions(+)
>  create mode 100644 man3/__ppc_set_ppr_low.3
>  create mode 100644 man3/__ppc_set_ppr_med.3
>  create mode 100644 man3/__ppc_set_ppr_med_low.3
> 
> diff --git a/man3/__ppc_set_ppr_low.3 b/man3/__ppc_set_ppr_low.3
> new file mode 100644
> index 0000000..a6d6cf3
> --- /dev/null
> +++ b/man3/__ppc_set_ppr_low.3
> @@ -0,0 +1 @@
> +.so man3/__ppc_set_ppr_med.3
> diff --git a/man3/__ppc_set_ppr_med.3 b/man3/__ppc_set_ppr_med.3
> new file mode 100644
> index 0000000..a6b6506
> --- /dev/null
> +++ b/man3/__ppc_set_ppr_med.3
> @@ -0,0 +1,96 @@
> +.\" Copyright (c) 2015, IBM Corporation.
> +.\"
> +.\" %%%LICENSE_START(VERBATIM)
> +.\" Permission is granted to make and distribute verbatim copies of this
> +.\" manual provided the copyright notice and this permission notice are
> +.\" preserved on all copies.
> +.\"
> +.\" Permission is granted to copy and distribute modified versions of
> +.\" this manual under the conditions for verbatim copying, provided that
> +.\" the entire resulting derived work is distributed under the terms of
> +.\" a permission notice identical to this one.
> +.\"
> +.\" Since the Linux kernel and libraries are constantly changing, this
> +.\" manual page may be incorrect or out-of-date.  The author(s) assume.
> +.\" no responsibility for errors or omissions, or for damages resulting.
> +.\" from the use of the information contained herein.  The author(s) may.
> +.\" not have taken the same level of care in the production of this.
> +.\" manual, which is licensed free of charge, as they might when working.
> +.\" professionally.
> +.\"
> +.\" Formatted or processed versions of this manual, if unaccompanied by
> +.\" the source, must acknowledge the copyright and authors of this work.
> +.\" %%%LICENSE_END
> +.\"
> +.\" Process this file with
> +.\" groff -man -Tascii foo.1
> +.\"
> +.TH __PPC_SET_PPR_MED 3 2015-08-05 "GNU C Library" "Linux\
> +Programmer's Manual"
> +.SH NAME
> +__ppc_set_ppr_med, __ppc_set_ppr_low, __ppc_set_ppr_med_low \-
> +Set the Program Priority Register
> +.SH SYNOPSIS
> +.B #include <sys/platform/ppc.h>
> +.sp
> +.B void __ppc_set_ppr_med(void);
> +.br
> +.B void __ppc_set_ppr_low(void);
> +.br
> +.B void __ppc_set_ppr_med_low(void);
> +.SH DESCRIPTION
> +The functions
> +.BR __ppc_set_ppr_med (),
> +.BR __ppc_set_ppr_low ()
> +and
> +.BR __ppc_set_ppr_med_low ()
> +provide access to the
> +.I Program Priority Register
> +(PPR).
> +.P
> +The PPR is a 64-bit register that controls the program's priority.
> +By adjusting the PPR value the programmer may improve system
> +throughput by causing the system resources to be used more
> +efficiently, especially in contention situations.
> +The three unprivileged states available are covered by the functions
> +.BR __ppc_set_ppr_med (),
> +.BR __ppc_set_ppr_low ()
> +and
> +.BR __ppc_set_ppr_med_low ().
> +More information available in Power ISA 2.06b - Book II - Section 3.1.

Again, I removed the "2.06b", since that seems superfluous: it's a version
number where the minor version number increases now and then. Okay?

> +.P
> +.BR __ppc_set_ppr_med ()
> +sets the Program Priority Register to medium value (default).
> +.P
> +.BR __ppc_set_ppr_low ()
> +sets the Program Priority Register to low value.
> +.P
> +.BR __ppc_set_ppr_med_low ()
> +sets the Program Priority Register to medium low value.
> +.SH VERSIONS
> +GNU C Library added support for
> +.BR __ppc_set_ppr_med (),
> +.BR __ppc_set_ppr_low ()
> +and
> +.BR __ppc_set_ppr_med_low ()
> +in version 2.18.
> +.SH ATTRIBUTES
> +For an explanation of the terms used in this section, see
> +.BR attributes (7).
> +.ad l
> +.TS
> +allbox;
> +lb lb lb
> +l l l.
> +Interface	Attribute	Value
> +T{
> +.BR __ppc_set_ppr_med (),
> +.BR __ppc_set_ppr_low (),
> +.BR __ppc_set_ppr_med_low ()
> +T}	Thread safety	MT-Safe
> +.TE
> +.ad
> +.SH CONFORMING TO
> +These functions are nonstandard GNU extensions.
> +.SH SEE ALSO
> +.BR __ppc_yield (3)
> diff --git a/man3/__ppc_set_ppr_med_low.3 b/man3/__ppc_set_ppr_med_low.3
> new file mode 100644
> index 0000000..a6d6cf3
> --- /dev/null
> +++ b/man3/__ppc_set_ppr_med_low.3
> @@ -0,0 +1 @@
> +.so man3/__ppc_set_ppr_med.3

Cheers,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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