From: Len Brown <lenb@kernel.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, Len Brown <len.brown@intel.com>,
linux-doc@vger.kernel.org
Subject: [PATCH 02/14] topolgy: Simplify cputopology.txt formatting and wording
Date: Tue, 26 Feb 2019 01:20:00 -0500 [thread overview]
Message-ID: <1ca56f8ea922a67f0017bd645912ea02a65a85ec.1551160674.git.len.brown@intel.com> (raw)
In-Reply-To: <e2810a5317d3a109a98204e883fd1461f77b9339.1551160674.git.len.brown@intel.com>
From: Len Brown <len.brown@intel.com>
Syntax only, no functional or semantic change.
Signed-off-by: Len Brown <len.brown@intel.com>
Cc: linux-doc@vger.kernel.org
---
Documentation/cputopology.txt | 46 +++++++++++++++++------------------
1 file changed, 23 insertions(+), 23 deletions(-)
diff --git a/Documentation/cputopology.txt b/Documentation/cputopology.txt
index c6e7e9196a8b..cb61277e2308 100644
--- a/Documentation/cputopology.txt
+++ b/Documentation/cputopology.txt
@@ -3,79 +3,79 @@ How CPU topology info is exported via sysfs
===========================================
Export CPU topology info via sysfs. Items (attributes) are similar
-to /proc/cpuinfo output of some architectures:
+to /proc/cpuinfo output of some architectures. They reside in
+/sys/devices/system/cpu/cpuX/topology/:
-1) /sys/devices/system/cpu/cpuX/topology/physical_package_id:
+physical_package_id:
physical package id of cpuX. Typically corresponds to a physical
socket number, but the actual value is architecture and platform
dependent.
-2) /sys/devices/system/cpu/cpuX/topology/core_id:
+core_id:
the CPU core ID of cpuX. Typically it is the hardware platform's
identifier (rather than the kernel's). The actual value is
architecture and platform dependent.
-3) /sys/devices/system/cpu/cpuX/topology/book_id:
+book_id:
the book ID of cpuX. Typically it is the hardware platform's
identifier (rather than the kernel's). The actual value is
architecture and platform dependent.
-4) /sys/devices/system/cpu/cpuX/topology/drawer_id:
+drawer_id:
the drawer ID of cpuX. Typically it is the hardware platform's
identifier (rather than the kernel's). The actual value is
architecture and platform dependent.
-5) /sys/devices/system/cpu/cpuX/topology/thread_siblings:
+thread_siblings:
internal kernel map of cpuX's hardware threads within the same
core as cpuX.
-6) /sys/devices/system/cpu/cpuX/topology/thread_siblings_list:
+thread_siblings_list:
human-readable list of cpuX's hardware threads within the same
core as cpuX.
-7) /sys/devices/system/cpu/cpuX/topology/core_siblings:
+core_siblings:
internal kernel map of cpuX's hardware threads within the same
physical_package_id.
-8) /sys/devices/system/cpu/cpuX/topology/core_siblings_list:
+core_siblings_list:
human-readable list of cpuX's hardware threads within the same
physical_package_id.
-9) /sys/devices/system/cpu/cpuX/topology/book_siblings:
+book_siblings:
internal kernel map of cpuX's hardware threads within the same
book_id.
-10) /sys/devices/system/cpu/cpuX/topology/book_siblings_list:
+book_siblings_list:
human-readable list of cpuX's hardware threads within the same
book_id.
-11) /sys/devices/system/cpu/cpuX/topology/drawer_siblings:
+drawer_siblings:
internal kernel map of cpuX's hardware threads within the same
drawer_id.
-12) /sys/devices/system/cpu/cpuX/topology/drawer_siblings_list:
+drawer_siblings_list:
human-readable list of cpuX's hardware threads within the same
drawer_id.
-To implement it in an architecture-neutral way, a new source file,
-drivers/base/topology.c, is to export the 6 to 12 attributes. The book
-and drawer related sysfs files will only be created if CONFIG_SCHED_BOOK
-and CONFIG_SCHED_DRAWER are selected.
+Architecture-neutral, drivers/base/topology.c, exports these attributes.
+However, the book and drawer related sysfs files will only be created if
+CONFIG_SCHED_BOOK and CONFIG_SCHED_DRAWER are selected, respectively.
-CONFIG_SCHED_BOOK and CONFIG_DRAWER are currently only used on s390, where
-they reflect the cpu and cache hierarchy.
+CONFIG_SCHED_BOOK and CONFIG_SCHED_DRAWER are currently only used on s390,
+where they reflect the cpu and cache hierarchy.
For an architecture to support this feature, it must define some of
these macros in include/asm-XXX/topology.h::
@@ -98,10 +98,10 @@ To be consistent on all architectures, include/linux/topology.h
provides default definitions for any of the above macros that are
not defined by include/asm-XXX/topology.h:
-1) physical_package_id: -1
-2) core_id: 0
-3) sibling_cpumask: just the given CPU
-4) core_cpumask: just the given CPU
+1) topology_physical_package_id: -1
+2) topology_core_id: 0
+3) topology_sibling_cpumask: just the given CPU
+4) topology_core_cpumask: just the given CPU
For architectures that don't support books (CONFIG_SCHED_BOOK) there are no
default definitions for topology_book_id() and topology_book_cpumask().
--
2.18.0-rc0
next prev parent reply other threads:[~2019-02-26 6:21 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-26 6:19 [PATCH 0/14] v2 multi-die/package topology support Len Brown
2019-02-26 6:19 ` [PATCH 01/14] x86 topology: Fix doc typo Len Brown
2019-02-26 6:20 ` Len Brown [this message]
2019-02-26 6:20 ` [PATCH 03/14] x86 smpboot: Rename match_die() to match_pkg() Len Brown
2019-02-26 6:20 ` [PATCH 04/14] x86 topology: Add CPUID.1F multi-die/package support Len Brown
2019-02-26 19:46 ` Dave Hansen
2019-02-28 15:43 ` Len Brown
2019-04-05 18:16 ` Thomas Gleixner
2019-02-26 6:20 ` [PATCH 05/14] cpu topology: Export die_id Len Brown
2019-03-07 14:45 ` Morten Rasmussen
2019-03-26 18:18 ` Len Brown
2019-02-26 6:20 ` [PATCH 06/14] x86 topology: Define topology_logical_die_id() Len Brown
2019-02-26 6:20 ` [PATCH 07/14] powercap/intel_rapl: Simplify rapl_find_package() Len Brown
2019-02-26 19:06 ` Peter Zijlstra
2019-03-26 18:27 ` Len Brown
2019-02-26 6:20 ` [PATCH 08/14] powercap/intel_rapl: Support multi-die/package Len Brown
2019-04-05 18:27 ` Thomas Gleixner
2019-04-08 1:35 ` Zhang Rui
2019-02-26 6:20 ` [PATCH 09/14] thermal/x86_pkg_temp_thermal: " Len Brown
2019-04-05 18:29 ` Thomas Gleixner
2019-04-05 18:39 ` Brown, Len
2019-04-05 18:50 ` Thomas Gleixner
2019-02-26 6:20 ` [PATCH 10/14] powercap/intel_rapl: update rapl domain name and debug messages Len Brown
2019-02-26 6:20 ` [PATCH 11/14] hwmon/coretemp: Support multi-die/package Len Brown
2019-02-26 6:20 ` [PATCH 12/14] topology: Create package_threads sysfs attribute Len Brown
2019-02-26 6:20 ` [PATCH 13/14] topology: Create core_threads " Len Brown
2019-02-26 6:20 ` [PATCH 14/14] topology: Create die_threads " Len Brown
2019-02-26 18:51 ` [PATCH 0/14] v2 multi-die/package topology support Peter Zijlstra
2019-04-12 19:32 ` Len Brown
2019-02-26 18:53 ` Peter Zijlstra
2019-03-07 14:59 ` Morten Rasmussen
2019-04-05 18:33 ` Thomas Gleixner
2019-04-12 19:52 ` Len Brown
2019-04-12 20:40 ` Brice Goglin
2019-02-26 19:05 ` Peter Zijlstra
2019-04-30 6:50 ` Len Brown
2019-04-30 9:33 ` Borislav Petkov
2019-04-30 18:46 ` Len Brown
2019-04-05 18:33 ` Thomas Gleixner
2019-04-30 20:55 [PATCH 01/14] x86 topology: Fix doc typo Len Brown
2019-04-30 20:55 ` [PATCH 02/14] topolgy: Simplify cputopology.txt formatting and wording Len Brown
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