From: Reinette Chatre <reinette.chatre@intel.com>
To: Babu Moger <babu.moger@amd.com>, <tony.luck@intel.com>,
<tglx@linutronix.de>, <mingo@redhat.com>, <bp@alien8.de>,
<dave.hansen@linux.intel.com>
Cc: <corbet@lwn.net>, <Dave.Martin@arm.com>, <james.morse@arm.com>,
<x86@kernel.org>, <hpa@zytor.com>, <akpm@linux-foundation.org>,
<paulmck@kernel.org>, <rdunlap@infradead.org>, <pmladek@suse.com>,
<kees@kernel.org>, <arnd@arndb.de>, <fvdl@google.com>,
<seanjc@google.com>, <pawan.kumar.gupta@linux.intel.com>,
<xin@zytor.com>, <thomas.lendacky@amd.com>,
<sohil.mehta@intel.com>, <jarkko@kernel.org>,
<chang.seok.bae@intel.com>, <ebiggers@google.com>,
<elena.reshetova@intel.com>, <ak@linux.intel.com>,
<mario.limonciello@amd.com>, <perry.yuan@amd.com>,
<linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<peternewman@google.com>
Subject: Re: [PATCH v10 07/10] fs/resctrl: Introduce interface to display io_alloc CBMs
Date: Fri, 24 Oct 2025 16:43:35 -0700 [thread overview]
Message-ID: <003d4e31-76df-43ed-ac23-9f6de7ca44cb@intel.com> (raw)
In-Reply-To: <7aecf0ce36527b9c3b8b121272cb140a4fbf5658.1761090860.git.babu.moger@amd.com>
Hi Babu,
On 10/21/25 4:54 PM, Babu Moger wrote:
> Introduce the "io_alloc_cbm" resctrl file to display the capacity bitmasks
> (CBMs) that represent the portions of each cache instance allocated
> for I/O traffic on a cache resource that supports the "io_alloc" feature.
>
> io_alloc_cbm resides in the info directory of a cache resource, for example,
> /sys/fs/resctrl/info/L3/. Since the resource name is part of the path, it
> is not necessary to display the resource name as done in the schemata file.
>
> When CDP is enabled, io_alloc routes traffic using the highest CLOSID
> associated with the CDP_CODE resource and that CLOSID becomes unusable for
> the CDP_DATA resource. The highest CLOSID of CDP_CODE and CDP_DATA resources
> will be kept in sync to ensure consistent user interface. In preparation for
> this, access the CBMs for I/O traffic through highest CLOSID of either
> CDP_CODE or CDP_DATA resource.
>
> Signed-off-by: Babu Moger <babu.moger@amd.com>
> ---
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Reinette
next prev parent reply other threads:[~2025-10-24 23:43 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-21 23:54 [PATCH v10 00/10] x86,fs/resctrl: Support L3 Smart Data Cache Injection Allocation Enforcement (SDCIAE) Babu Moger
2025-10-21 23:54 ` [PATCH v10 01/10] x86/cpufeatures: Add support for L3 Smart Data Cache Injection Allocation Enforcement Babu Moger
2025-10-21 23:54 ` [PATCH v10 02/10] x86/resctrl: Add SDCIAE feature in the command line options Babu Moger
2025-10-21 23:54 ` [PATCH v10 03/10] x86,fs/resctrl: Detect io_alloc feature Babu Moger
2025-10-21 23:54 ` [PATCH v10 04/10] x86,fs/resctrl: Implement "io_alloc" enable/disable handlers Babu Moger
2025-10-24 23:39 ` Reinette Chatre
2025-10-21 23:54 ` [PATCH v10 05/10] fs/resctrl: Introduce interface to display "io_alloc" support Babu Moger
2025-10-24 23:40 ` Reinette Chatre
2025-10-21 23:54 ` [PATCH v10 06/10] fs/resctrl: Add user interface to enable/disable io_alloc feature Babu Moger
2025-10-24 23:43 ` Reinette Chatre
2025-10-27 18:32 ` Babu Moger
2025-10-21 23:54 ` [PATCH v10 07/10] fs/resctrl: Introduce interface to display io_alloc CBMs Babu Moger
2025-10-24 23:43 ` Reinette Chatre [this message]
2025-10-21 23:54 ` [PATCH v10 08/10] fs/resctrl: Modify struct rdt_parse_data to pass mode and CLOSID Babu Moger
2025-10-21 23:54 ` [PATCH v10 09/10] fs/resctrl: Introduce interface to modify io_alloc capacity bitmasks Babu Moger
2025-10-24 23:43 ` Reinette Chatre
2025-10-21 23:54 ` [PATCH v10 10/10] fs/resctrl: Update bit_usage to reflect io_alloc Babu Moger
2025-10-24 23:44 ` Reinette Chatre
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