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, corbet@lwn.net,
fenghua.yu@intel.com, jdelvare@suse.com, linux@roeck-us.net,
len.brown@intel.com, rui.zhang@intel.com
Subject: [PATCH V2 7/8] Documentation: x86: Update smp_num_siblings/x86_max_cores description
Date: Tue, 16 Aug 2022 13:16:32 +0800 [thread overview]
Message-ID: <20220816051633.17775-8-rui.zhang@intel.com> (raw)
In-Reply-To: <20220816051633.17775-1-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:[~2022-08-16 7:57 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-16 5:16 [PATCH V2 0/8] x86/topology: Improve CPUID.1F handling Zhang Rui
2022-08-16 5:16 ` [PATCH V2 1/8] perf/x86/intel/P4: Fix smp_num_siblings usage Zhang Rui
2022-08-16 8:27 ` Peter Zijlstra
2022-08-16 9:47 ` Zhang Rui
2022-08-16 10:08 ` Peter Zijlstra
2022-08-16 5:16 ` [PATCH V2 2/8] hwmon/coretemp: Rename indx to index Zhang Rui
2022-08-16 5:16 ` [PATCH V2 3/8] hwmon/coretemp: Handle large core ID value Zhang Rui
2022-08-16 11:16 ` Guenter Roeck
2022-08-16 5:16 ` [PATCH V2 4/8] x86/topology: Fix multiple packages shown on a single-package system Zhang Rui
2022-09-21 16:26 ` Dave Hansen
2022-09-22 13:38 ` Zhang Rui
2022-08-16 5:16 ` [PATCH V2 5/8] x86/topology: Fix duplicated core ID within a package Zhang Rui
2022-08-16 5:16 ` [PATCH V2 6/8] x86/topology: Fix max_siblings calculation Zhang Rui
2022-08-16 5:16 ` Zhang Rui [this message]
2022-08-16 5:16 ` [PATCH V2 8/8] Documentation: x86: Remove obsolete x86_max_dies description Zhang Rui
2022-09-20 1:57 ` [PATCH V2 0/8] x86/topology: Improve CPUID.1F handling Zhang Rui
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220816051633.17775-8-rui.zhang@intel.com \
--to=rui.zhang@intel.com \
--cc=bp@alien8.de \
--cc=corbet@lwn.net \
--cc=dave.hansen@linux.intel.com \
--cc=fenghua.yu@intel.com \
--cc=hpa@zytor.com \
--cc=jdelvare@suse.com \
--cc=len.brown@intel.com \
--cc=linux-hwmon@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@roeck-us.net \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).