From: Zhang Rui <rui.zhang@intel.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org,
linux-hwmon@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, hpa@zytor.com, peterz@infradead.org,
corbet@lwn.net, fenghua.yu@intel.com, jdelvare@suse.com,
linux@roeck-us.net, len.brown@intel.com, rui.zhang@intel.com
Subject: [PATCH V3 7/8] Documentation: x86: Update smp_num_siblings/x86_max_cores description
Date: Thu, 22 Sep 2022 21:37:59 +0800 [thread overview]
Message-ID: <20220922133800.12918-8-rui.zhang@intel.com> (raw)
In-Reply-To: <20220922133800.12918-1-rui.zhang@intel.com>
smp_num_siblings/cpuinfo_x86.x86_max_cores are retrieved via CPUID EAX
bit_shift value, and they represent the maximum possible number of threads
in a core, and the maximum possible number of cores in a package.
Update the smp_num_siblings/cpuinfo_x86.x86_max_cores description in the
documentation.
Reviewed-by: Len Brown <len.brown@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
---
Documentation/x86/topology.rst | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/Documentation/x86/topology.rst b/Documentation/x86/topology.rst
index 7f58010ea86a..c5eb5bc42380 100644
--- a/Documentation/x86/topology.rst
+++ b/Documentation/x86/topology.rst
@@ -49,7 +49,8 @@ AMD nomenclature for package is 'Node'.
- cpuinfo_x86.x86_max_cores:
- The number of cores in a package. This information is retrieved via CPUID.
+ The maximum possible number of cores in a package. This information is
+ retrieved via CPUID.
- cpuinfo_x86.x86_max_dies:
@@ -102,10 +103,10 @@ AMDs nomenclature for a CMT core is "Compute Unit". The kernel always uses
- smp_num_siblings:
- The number of threads in a core. The number of threads in a package can be
- calculated by::
+ The maximum possible number of threads in a core. The maximum possible
+ number of threads in a package can be calculated by::
- threads_per_package = cpuinfo_x86.x86_max_cores * smp_num_siblings
+ maximum_threads_per_package = cpuinfo_x86.x86_max_cores * smp_num_siblings
Threads
--
2.25.1
next prev parent reply other threads:[~2022-09-22 13:36 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-22 13:37 [PATCH V3 0/8] x86/topology: Improve CPUID.1F handling Zhang Rui
2022-09-22 13:37 ` [PATCH V3 1/8] perf/x86/intel/P4: Unify logic for detecting HT Zhang Rui
2022-09-22 13:37 ` [PATCH V3 2/8] hwmon/coretemp: Rename indx to index Zhang Rui
2022-09-22 14:58 ` Guenter Roeck
2022-09-22 13:37 ` [PATCH V3 3/8] hwmon/coretemp: Handle large core ID value Zhang Rui
2022-09-22 14:59 ` Guenter Roeck
2022-09-22 13:37 ` [PATCH V3 4/8] x86/topology: Fix multiple packages shown on a single-package system Zhang Rui
2022-09-22 13:37 ` [PATCH V3 5/8] x86/topology: Fix duplicated core ID within a package Zhang Rui
2022-09-22 13:37 ` [PATCH V3 6/8] x86/topology: Fix max_siblings calculation Zhang Rui
2022-09-22 13:37 ` Zhang Rui [this message]
2022-09-22 13:38 ` [PATCH V3 8/8] Documentation: x86: Remove obsolete x86_max_dies description Zhang Rui
2022-09-22 16:53 ` [PATCH V3 0/8] x86/topology: Improve CPUID.1F handling Dave Hansen
2022-09-23 8:39 ` Zhang Rui
2022-10-13 10:58 ` Len Brown
2022-10-13 15:56 ` Dave Hansen
2022-10-14 2:06 ` Zhang Rui
2022-10-14 3:19 ` Dave Hansen
2022-10-14 5:35 ` Zhang Rui
2022-10-14 8:17 ` Peter Zijlstra
2022-10-14 9:01 ` Zhang Rui
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