From: Bagas Sanjaya <bagasdotme@gmail.com>
To: K Prateek Nayak <kprateek.nayak@amd.com>, linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, hpa@zytor.com, corbet@lwn.net,
jgross@suse.com, andrew.cooper3@citrix.com, peterz@infradead.org,
Jason@zx2c4.com, thomas.lendacky@amd.com, puwen@hygon.cn,
x86@kernel.org, linux-doc@vger.kernel.org,
oleksandr@natalenko.name
Subject: Re: [PATCH v2.1 2/2] x86/Documentation: Add documentation about cluster
Date: Sat, 15 Apr 2023 09:24:28 +0700 [thread overview]
Message-ID: <cf4fdb30-6f2e-ca3e-fbc0-b48f6949508d@gmail.com> (raw)
In-Reply-To: <20230414031743.875-1-kprateek.nayak@amd.com>
On 4/14/23 10:17, K Prateek Nayak wrote:
> + - cluster_id:
> +
> + A per-CPU variable containing:
> +
> + - Upper bits extracted from the APIC ID. CPUs which have the same value
> + in these bits share an L2 and have the same cluster_id.
> +
> + CPUs for which cluster information is unavailable will show 65535
> + (BAD_APICID) as the cluster_id.
"... return cluster_id of 65535 (BAD_APICID)."
> The number of online threads is also printed in /proc/cpuinfo "siblings."
>
> + - topology_cluster_cpumask():
> +
> + The cpumask contains all online threads in the cluster to which a thread
> + belongs.
> +
Looks OK.
> The physical package ID to which a thread belongs.
>
> + - topology_cluster_id();
> +
> + The ID of the cluster to which a thread belongs.
> +
Looks OK.
Thanks.
--
An old man doll... just what I always wanted! - Clara
next prev parent reply other threads:[~2023-04-15 2:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-13 17:29 [PATCH v2 0/2] arch/x86: Set L2 Cache ID on AMD and Hygon processors K Prateek Nayak
2023-04-13 17:29 ` [PATCH v2 1/2] " K Prateek Nayak
2023-04-13 17:29 ` [PATCH v2 2/2] x86/Documentation: Add documentation about cluster K Prateek Nayak
2023-04-13 17:57 ` Dave Hansen
2023-04-14 2:37 ` K Prateek Nayak
2023-04-14 3:17 ` [PATCH v2.1 " K Prateek Nayak
2023-04-15 2:24 ` Bagas Sanjaya [this message]
2023-04-17 0:23 ` Dave Hansen
2023-04-18 2:19 ` Bagas Sanjaya
2023-05-18 2:27 ` [PATCH v2 0/2] arch/x86: Set L2 Cache ID on AMD and Hygon processors K Prateek Nayak
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