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* [PATCH] __ppc_set_ppr_med.3: Document PPC functions providing access to PPR
@ 2015-09-23 12:08 Gabriel F. T. Gomes
       [not found] ` <1443010136-21033-1-git-send-email-gftg-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
  0 siblings, 1 reply; 2+ messages in thread
From: Gabriel F. T. Gomes @ 2015-09-23 12:08 UTC (permalink / raw)
  To: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w
  Cc: linux-man-u79uwXL29TY76Z2rM5mHXA,
	tuliom-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8

Hi.

The commit ID referred to below is already integrated into glibc's master
branch, however glibc 2.23 (mentioned in the text) has not yet been released.

Ok to already commit?

-- 8< --
GNU C Library commit 1747fcda4902a3b46183d93fb16ed9b436b2608b extends the
priorities that can be set to the Program Priority Register (PPR), with the
functions: __ppc_set_ppr_very_low(3) and __ppc_set_ppr_med_high(3).

Signed-off-by: Gabriel F. T. Gomes <gftg-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
---
 man3/__ppc_set_ppr_med.3      | 41 +++++++++++++++++++++++++++++++++++++----
 man3/__ppc_set_ppr_med_high.3 |  1 +
 man3/__ppc_set_ppr_very_low.3 |  1 +
 3 files changed, 39 insertions(+), 4 deletions(-)
 create mode 100644 man3/__ppc_set_ppr_med_high.3
 create mode 100644 man3/__ppc_set_ppr_very_low.3

diff --git a/man3/__ppc_set_ppr_med.3 b/man3/__ppc_set_ppr_med.3
index b106647..2fd5d6f 100644
--- a/man3/__ppc_set_ppr_med.3
+++ b/man3/__ppc_set_ppr_med.3
@@ -25,16 +25,20 @@
 .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 \-
+__ppc_set_ppr_med, __ppc_set_ppr_very_low, __ppc_set_ppr_low, __ppc_set_ppr_med_low, __ppc_set_ppr_med_high \-
 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_very_low(void);
+.br
 .B void __ppc_set_ppr_low(void);
 .br
 .B void __ppc_set_ppr_med_low(void);
+.br
+.B void __ppc_set_ppr_med_high(void);
 .SH DESCRIPTION
 These functions provide access to the
 .I Program Priority Register
@@ -44,13 +48,17 @@ 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 system resources to be used more
 efficiently, especially in contention situations.
-The three unprivileged states available are covered by the following functions:
+The four unprivileged states available are covered by the following functions:
 .IP * 3
 .BR __ppc_set_ppr_med ()
 sets the Program Priority Register value to
 .IR medium
 (default).
 .IP *
+.BR __ppc_set_ppr_very_low ()
+sets the Program Priority Register value to
+.IR "very low" .
+.IP *
 .BR __ppc_set_ppr_low ()
 sets the Program Priority Register value to
 .IR low .
@@ -58,8 +66,31 @@ sets the Program Priority Register value to
 .BR __ppc_set_ppr_med_low ()
 sets the Program Priority Register value to
 .IR "medium low" .
+.P
+The privileged state
+.IR "medium high"
+may also be set during certain time intervals by problem-state (unprivileged)
+programs, with the following function:
+.IP * 3
+.BR __ppc_set_ppr_med_high ()
+sets the Program Priority to
+.IR "medium high" .
+.P
+If the program priority is medium high when the time interval expires or if an
+attempt is made to set the priority to medium high when it is not allowed, the
+priority is set to medium.
 .SH VERSIONS
-These functions first appeared in glibc in version 2.18.
+The functions
+.BR __ppc_set_ppr_med (),
+.BR __ppc_set_ppr_low ()
+and
+.BR __ppc_set_ppr_med_low ()
+are provided by glibc since version 2.18.
+The functions
+.BR __ppc_set_ppr_very_low ()
+and
+.BR __ppc_set_ppr_med_high ()
+first appeared in glibc in version 2.23.
 .SH ATTRIBUTES
 For an explanation of the terms used in this section, see
 .BR attributes (7).
@@ -71,8 +102,10 @@ l l l.
 Interface	Attribute	Value
 T{
 .BR __ppc_set_ppr_med (),
+.BR __ppc_set_ppr_very_low (),
 .BR __ppc_set_ppr_low (),
-.BR __ppc_set_ppr_med_low ()
+.BR __ppc_set_ppr_med_low (),
+.BR __ppc_set_ppr_med_high ()
 T}	Thread safety	MT-Safe
 .TE
 .ad
diff --git a/man3/__ppc_set_ppr_med_high.3 b/man3/__ppc_set_ppr_med_high.3
new file mode 100644
index 0000000..a6d6cf3
--- /dev/null
+++ b/man3/__ppc_set_ppr_med_high.3
@@ -0,0 +1 @@
+.so man3/__ppc_set_ppr_med.3
diff --git a/man3/__ppc_set_ppr_very_low.3 b/man3/__ppc_set_ppr_very_low.3
new file mode 100644
index 0000000..a6d6cf3
--- /dev/null
+++ b/man3/__ppc_set_ppr_very_low.3
@@ -0,0 +1 @@
+.so man3/__ppc_set_ppr_med.3
-- 
2.1.0

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2015-09-23 12:08 [PATCH] __ppc_set_ppr_med.3: Document PPC functions providing access to PPR Gabriel F. T. Gomes
     [not found] ` <1443010136-21033-1-git-send-email-gftg-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2015-10-08 21:09   ` Michael Kerrisk (man-pages)

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