15 Jul, 2017
1 commit
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Each text file under Documentation follows a different
format. Some doesn't even have titles!Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:- Add a title for the document;
- mark literals;
- use table markup for existing table.Signed-off-by: Mauro Carvalho Chehab
Signed-off-by: Jonathan Corbet
28 Apr, 2017
1 commit
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This commit gets rid of some minor errors in Documentation/:
* cputopology.txt: drawes -> drawers
* debugging-via-ohci1394.txt: remove an unnecessary line break
* static-keys: statemnts -> statements
* zorro.txt: busses -> busesSigned-off-by: Stan Drozd
Signed-off-by: Jonathan Corbet
13 Jun, 2016
1 commit
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The s390 cpu topology gained another hierarchy level. The top level is
now called drawer and contains several books. A book used to be the
top level.In order to expose the cpu topology to user space allow to create new
sysfs attributes dependent on CONFIG_SCHED_DRAWER which an
architecture may define and select.These additional attributes will be available:
/sys/devices/system/cpu/cpuX/topology/drawer_id
/sys/devices/system/cpu/cpuX/topology/drawer_siblings
/sys/devices/system/cpu/cpuX/topology/drawer_siblings_listSigned-off-by: Heiko Carstens
Acked-by: Peter Zijlstra (Intel)
Signed-off-by: Martin Schwidefsky
27 May, 2015
2 commits
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The documentation on cpu topology seems to be a bit out-of-date.
It doesn't mention the **_siblings_list attributes and uses old
names for topology_**_cpumask() macros.Add information on missing attributes plus some additional
clarifications.Signed-off-by: Bartosz Golaszewski
Cc: Benoit Cousson
Cc: Catalin Marinas
Cc: Fenghua Yu
Cc: Guenter Roeck
Cc: Jean Delvare
Cc: Jonathan Corbet
Cc: Linus Torvalds
Cc: Oleg Drokin
Cc: Peter Zijlstra
Cc: Rafael J. Wysocki
Cc: Russell King
Cc: Thomas Gleixner
Cc: Viresh Kumar
Link: http://lkml.kernel.org/r/1432645896-12588-3-git-send-email-bgolaszewski@baylibre.com
Signed-off-by: Ingo Molnar -
Rename topology_thread_cpumask() to topology_sibling_cpumask()
for more consistency with scheduler code.Signed-off-by: Bartosz Golaszewski
Reviewed-by: Thomas Gleixner
Acked-by: Russell King
Acked-by: Catalin Marinas
Cc: Benoit Cousson
Cc: Fenghua Yu
Cc: Guenter Roeck
Cc: Jean Delvare
Cc: Jonathan Corbet
Cc: Linus Torvalds
Cc: Oleg Drokin
Cc: Peter Zijlstra
Cc: Rafael J. Wysocki
Cc: Russell King
Cc: Viresh Kumar
Link: http://lkml.kernel.org/r/1432645896-12588-2-git-send-email-bgolaszewski@baylibre.com
Signed-off-by: Ingo Molnar
04 Sep, 2013
1 commit
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Fix a trivial typo in Documentation/cputopology.txt
Signed-off-by: Xishi Qiu
Signed-off-by: Jiri Kosina
10 Sep, 2010
1 commit
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Create attributes:
/sys/devices/system/cpu/cpuX/topology/book_id
/sys/devices/system/cpu/cpuX/topology/book_siblingswhich show the book id and the book siblings of a cpu.
Unlike the attributes for SMT and MC these attributes are only present if
CONFIG_SCHED_BOOK is set. There is no reason to pollute sysfs for every
architecture with unused attributes.Signed-off-by: Heiko Carstens
Signed-off-by: Peter Zijlstra
LKML-Reference:
Signed-off-by: Ingo Molnar
31 Oct, 2009
1 commit
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Add brief descriptions for the following sysfs files:
/sys/devices/system/cpu/cpu#/topology/core_id
/sys/devices/system/cpu/cpu#/topology/core_siblings
/sys/devices/system/cpu/cpu#/topology/core_siblings_list
/sys/devices/system/cpu/cpu#/topology/physical_package_id
/sys/devices/system/cpu/cpu#/topology/thread_siblings
/sys/devices/system/cpu/cpu#/topology/thread_siblings_listThe descriptions in Documentation/cputopology.txt weren't very
informative, so I attempted a better description based on code
reading and hopeful guessing.Updated Documentation/cputopology.txt with the better descriptions and
fixed some style issues.Cc: Mike Travis
Cc: Rusty Russell
Signed-off-by: Alex Chiang
Signed-off-by: Greg Kroah-Hartman
12 Jan, 2009
1 commit
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Impact: reduce stack usage, use new cpumask API.
This actually uses topology_core_cpumask() and
topology_thread_cpumask(), removing the only users of
topology_core_siblings() and topology_thread_siblings()Signed-off-by: Rusty Russell
Signed-off-by: Mike Travis
Cc: linux-net-drivers@solarflare.com
19 Dec, 2008
1 commit
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Add information to cputopology.txt explaining the output of various
system cpumask's.Signed-off-by: Mike Travis
Signed-off-by: Rusty Russell
Acked-by: Greg Kroah-Hartman
13 Jun, 2008
1 commit
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This can result in an empty topology directory in sysfs, and requires
in-kernel users to protect all uses with #ifdef - see
.The documentation of CPU topology specifies what the defaults should be if
only partial information is available from the hardware. So we can
provide these defaults as a fallback.This patch:
- Adds default definitions of the 4 topology macros to
- Changes drivers/base/topology.c to use the topology macros unconditionally
and to cope with definitions that aren't lvalues
- Updates documentation accordingly[ From: Andrew Morton
- fold now-duplicated code
- fix layout
]Signed-off-by: Ben Hutchings
Cc: Vegard Nossum
Cc: Nick Piggin
Cc: Chandra Seetharaman
Cc: Suresh Siddha
Cc: Mike Travis
Cc: Christoph Lameter
Cc: John Hawkes
Cc: Zhang, Yanmin
Signed-off-by: Andrew Morton
Signed-off-by: Ingo Molnar
04 Oct, 2006
1 commit
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This patch fixes typos in various Documentation txts. This patch addresses
some words starting with the letters 'D'-'E'.Signed-off-by: Matt LaPlante
Signed-off-by: Adrian Bunk
29 Mar, 2006
1 commit
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Fix a few trivial mistakes in Documentation/cputopology.txt
Signed-off-by: Jesper Juhl
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Feb, 2006
1 commit
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The patch implements cpu topology exportation by sysfs.
Items (attributes) are similar to /proc/cpuinfo.
1) /sys/devices/system/cpu/cpuX/topology/physical_package_id:
represent the physical package id of cpu X;
2) /sys/devices/system/cpu/cpuX/topology/core_id:
represent the cpu core id to cpu X;
3) /sys/devices/system/cpu/cpuX/topology/thread_siblings:
represent the thread siblings to cpu X in the same core;
4) /sys/devices/system/cpu/cpuX/topology/core_siblings:
represent the thread siblings to cpu X in the same physical package;To implement it in an architecture-neutral way, a new source file,
driver/base/topology.c, is to export the 5 attributes.If one architecture wants to support this feature, it just needs to
implement 4 defines, typically in file include/asm-XXX/topology.h.
The 4 defines are:
#define topology_physical_package_id(cpu)
#define topology_core_id(cpu)
#define topology_thread_siblings(cpu)
#define topology_core_siblings(cpu)The type of **_id is int.
The type of siblings is cpumask_t.To be consistent on all architectures, the 4 attributes should have
deafult values if their values are unavailable. Below is the rule.1) physical_package_id: If cpu has no physical package id, -1 is the
default value.2) core_id: If cpu doesn't support multi-core, its core id is 0.
3) thread_siblings: Just include itself, if the cpu doesn't support
HT/multi-thread.4) core_siblings: Just include itself, if the cpu doesn't support
multi-core and HT/Multi-thread.So be careful when declaring the 4 defines in include/asm-XXX/topology.h.
If an attribute isn't defined on an architecture, it won't be exported.
Thank Nathan, Greg, Andi, Paul and Venki.
The patch provides defines for i386/x86_64/ia64.
Signed-off-by: Zhang, Yanmin
Cc: Ingo Molnar
Cc: Nick Piggin
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
