From: Reinette Chatre <reinette.chatre@intel.com>
To: Ben Horgan <ben.horgan@arm.com>
Cc: <amitsinght@marvell.com>, <baisheng.gao@unisoc.com>,
<baolin.wang@linux.alibaba.com>, <carl@os.amperecomputing.com>,
<dave.martin@arm.com>, <david@kernel.org>,
<dfustini@baylibre.com>, <fenghuay@nvidia.com>,
<gshan@redhat.com>, <james.morse@arm.com>,
<jonathan.cameron@huawei.com>, <kobak@nvidia.com>,
<lcherian@marvell.com>, <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <peternewman@google.com>,
<punit.agrawal@oss.qualcomm.com>, <quic_jiles@quicinc.com>,
<rohit.mathew@arm.com>, <scott@os.amperecomputing.com>,
<sdonthineni@nvidia.com>, <tan.shaopeng@fujitsu.com>,
<xhao@linux.alibaba.com>, <catalin.marinas@arm.com>,
<will@kernel.org>, <corbet@lwn.net>, <maz@kernel.org>,
<oupton@kernel.org>, <joey.gouly@arm.com>,
<suzuki.poulose@arm.com>, <kvmarm@lists.linux.dev>,
Zeng Heng <zengheng4@huawei.com>
Subject: Re: [PATCH v3 27/47] arm_mpam: resctrl: Add support for 'MB' resource
Date: Tue, 13 Jan 2026 14:18:48 -0800 [thread overview]
Message-ID: <a48260d0-108c-470f-be72-1fd5235cf136@intel.com> (raw)
In-Reply-To: <20260112165914.4086692-28-ben.horgan@arm.com>
Hi Ben,
On 1/12/26 8:58 AM, Ben Horgan wrote:
> From: James Morse <james.morse@arm.com>
>
> resctrl supports 'MB', as a percentage throttling of traffic somewhere
> after the L3. This is the control that mba_sc uses, so ideally the class
> chosen should be as close as possible to the counters used for mba_local.
fyi ... [1] enabled total memory bandwidth to also be used as input to
software controller and additionally enabled user space to set per resource group
which memory bandwidth event is used as input to the software controller.
Reinette
[1] https://lore.kernel.org/all/20241206163148.83828-1-tony.luck@intel.com/
next prev parent reply other threads:[~2026-01-13 22:19 UTC|newest]
Thread overview: 160+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-12 16:58 [PATCH v3 00/47] arm_mpam: Add KVM/arm64 and resctrl glue code Ben Horgan
2026-01-12 16:58 ` [PATCH v3 01/47] arm_mpam: Remove duplicate linux/srcu.h header Ben Horgan
2026-01-12 17:13 ` Fenghua Yu
2026-01-15 2:12 ` Gavin Shan
2026-01-12 16:58 ` [PATCH v3 02/47] arm_mpam: Use non-atomic bitops when modifying feature bitmap Ben Horgan
2026-01-15 2:14 ` Gavin Shan
2026-01-16 11:57 ` Catalin Marinas
2026-01-16 12:02 ` Ben Horgan
2026-01-16 12:12 ` Ben Horgan
2026-01-16 15:51 ` Catalin Marinas
2026-01-12 16:58 ` [PATCH v3 03/47] arm64/sysreg: Add MPAMSM_EL1 register Ben Horgan
2026-01-15 2:16 ` Gavin Shan
2026-01-15 17:59 ` Catalin Marinas
2026-01-12 16:58 ` [PATCH v3 04/47] KVM: arm64: Preserve host MPAM configuration when changing traps Ben Horgan
2026-01-15 2:33 ` Gavin Shan
2026-01-12 16:58 ` [PATCH v3 05/47] KVM: arm64: Make MPAMSM_EL1 accesses UNDEF Ben Horgan
2026-01-15 2:34 ` Gavin Shan
2026-01-12 16:58 ` [PATCH v3 06/47] arm64: mpam: Context switch the MPAM registers Ben Horgan
2026-01-15 6:47 ` Gavin Shan
2026-01-15 12:09 ` Jonathan Cameron
2026-01-19 14:00 ` Ben Horgan
2026-01-20 1:42 ` Gavin Shan
2026-01-15 17:58 ` Catalin Marinas
2026-01-19 12:23 ` Ben Horgan
2026-01-23 14:29 ` Catalin Marinas
2026-01-26 14:30 ` Ben Horgan
2026-01-26 14:50 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 07/47] arm64: mpam: Re-initialise MPAM regs when CPU comes online Ben Horgan
2026-01-15 6:50 ` Gavin Shan
2026-01-15 18:14 ` Catalin Marinas
2026-01-19 13:38 ` Ben Horgan
2026-01-19 14:22 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 08/47] arm64: mpam: Advertise the CPUs MPAM limits to the driver Ben Horgan
2026-01-15 18:16 ` Catalin Marinas
2026-01-19 6:37 ` Gavin Shan
2026-01-19 14:49 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 09/47] arm64: mpam: Add cpu_pm notifier to restore MPAM sysregs Ben Horgan
2026-01-15 18:20 ` Catalin Marinas
2026-01-19 6:40 ` Gavin Shan
2026-01-19 6:50 ` Gavin Shan
2026-01-19 15:08 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 10/47] arm64: mpam: Initialise and context switch the MPAMSM_EL1 register Ben Horgan
2026-01-15 19:08 ` Catalin Marinas
2026-01-19 13:40 ` Ben Horgan
2026-01-19 6:51 ` Gavin Shan
2026-01-19 15:31 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 11/47] arm64: mpam: Add helpers to change a task or cpu's MPAM PARTID/PMG values Ben Horgan
2026-01-15 19:13 ` Catalin Marinas
2026-01-19 6:56 ` Gavin Shan
2026-01-19 15:47 ` Ben Horgan
2026-01-19 7:01 ` Gavin Shan
2026-01-19 15:49 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 12/47] KVM: arm64: Force guest EL1 to use user-space's partid configuration Ben Horgan
2026-01-13 14:19 ` Jonathan Cameron
2026-01-14 12:06 ` Marc Zyngier
2026-01-14 14:50 ` Ben Horgan
2026-01-15 9:05 ` Marc Zyngier
2026-01-15 11:14 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 13/47] KVM: arm64: Use kernel-space partid configuration for hypercalls Ben Horgan
2026-01-13 14:21 ` Jonathan Cameron
2026-01-13 14:35 ` Ben Horgan
2026-01-14 12:09 ` Marc Zyngier
2026-01-14 14:39 ` Ben Horgan
2026-01-14 16:50 ` Ben Horgan
2026-01-14 17:50 ` Marc Zyngier
2026-01-12 16:58 ` [PATCH v3 14/47] arm_mpam: resctrl: Add boilerplate cpuhp and domain allocation Ben Horgan
2026-01-13 16:49 ` Reinette Chatre
2026-01-19 17:20 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 15/47] arm_mpam: resctrl: Sort the order of the domain lists Ben Horgan
2026-01-12 16:58 ` [PATCH v3 16/47] arm_mpam: resctrl: Pick the caches we will use as resctrl resources Ben Horgan
2026-01-12 16:58 ` [PATCH v3 17/47] arm_mpam: resctrl: Implement resctrl_arch_reset_all_ctrls() Ben Horgan
2026-01-13 14:46 ` Jonathan Cameron
2026-01-13 14:58 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 18/47] arm_mpam: resctrl: Add resctrl_arch_get_config() Ben Horgan
2026-01-12 16:58 ` [PATCH v3 19/47] arm_mpam: resctrl: Implement helpers to update configuration Ben Horgan
2026-01-12 16:58 ` [PATCH v3 20/47] arm_mpam: resctrl: Add plumbing against arm64 task and cpu hooks Ben Horgan
2026-01-12 16:58 ` [PATCH v3 21/47] arm_mpam: resctrl: Add CDP emulation Ben Horgan
2026-01-12 16:58 ` [PATCH v3 22/47] arm_mpam: resctrl: Convert to/from MPAMs fixed-point formats Ben Horgan
2026-01-12 16:58 ` [PATCH v3 23/47] arm_mpam: resctrl: Add kunit test for control format conversions Ben Horgan
2026-01-12 16:58 ` [PATCH v3 24/47] arm_mpam: resctrl: Add rmid index helpers Ben Horgan
2026-01-13 14:55 ` Jonathan Cameron
2026-01-12 16:58 ` [PATCH v3 25/47] arm_mpam: resctrl: Add kunit test for rmid idx conversions Ben Horgan
2026-01-13 14:59 ` Jonathan Cameron
2026-01-12 16:58 ` [PATCH v3 26/47] arm_mpam: resctrl: Wait for cacheinfo to be ready Ben Horgan
2026-01-13 15:01 ` Jonathan Cameron
2026-01-13 15:15 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 27/47] arm_mpam: resctrl: Add support for 'MB' resource Ben Horgan
2026-01-13 15:06 ` Jonathan Cameron
2026-01-13 22:18 ` Reinette Chatre [this message]
2026-01-19 11:53 ` Gavin Shan
2026-01-19 13:53 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 28/47] arm_mpam: resctrl: Add support for csu counters Ben Horgan
2026-01-13 23:14 ` Reinette Chatre
2026-01-15 15:43 ` Ben Horgan
2026-01-15 18:54 ` Reinette Chatre
2026-01-16 10:29 ` Ben Horgan
2026-01-20 15:28 ` Peter Newman
2026-01-21 17:58 ` Reinette Chatre
2026-01-30 11:07 ` Ben Horgan
2026-01-30 11:19 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 29/47] arm_mpam: resctrl: Pick classes for use as mbm counters Ben Horgan
2026-01-15 15:49 ` Peter Newman
2026-01-19 12:04 ` James Morse
2026-01-19 12:47 ` Peter Newman
2026-01-26 16:00 ` Ben Horgan
2026-01-30 13:04 ` Peter Newman
2026-01-30 14:38 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 30/47] arm_mpam: resctrl: Pre-allocate free running monitors Ben Horgan
2026-01-13 15:10 ` Jonathan Cameron
2026-01-19 11:57 ` Gavin Shan
2026-01-19 20:27 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 31/47] arm_mpam: resctrl: Pre-allocate assignable monitors Ben Horgan
2026-01-16 10:34 ` Shaopeng Tan (Fujitsu)
2026-01-16 11:04 ` Ben Horgan
2026-01-19 20:34 ` Ben Horgan
2026-01-12 16:58 ` [PATCH v3 32/47] arm_mpam: resctrl: Add kunit test for ABMC/CDP interactions Ben Horgan
2026-01-13 15:26 ` Jonathan Cameron
2026-01-12 16:59 ` [PATCH v3 33/47] arm_mpam: resctrl: Add resctrl_arch_config_cntr() for ABMC use Ben Horgan
2026-01-12 16:59 ` [PATCH v3 34/47] arm_mpam: resctrl: Allow resctrl to allocate monitors Ben Horgan
2026-01-12 16:59 ` [PATCH v3 35/47] arm_mpam: resctrl: Add resctrl_arch_rmid_read() and resctrl_arch_reset_rmid() Ben Horgan
2026-01-12 16:59 ` [PATCH v3 36/47] arm_mpam: resctrl: Add resctrl_arch_cntr_read() & resctrl_arch_reset_cntr() Ben Horgan
2026-01-12 16:59 ` [PATCH v3 37/47] arm_mpam: resctrl: Update the rmid reallocation limit Ben Horgan
2026-01-15 10:05 ` Shaopeng Tan (Fujitsu)
2026-01-15 16:02 ` Ben Horgan
2026-01-12 16:59 ` [PATCH v3 38/47] arm_mpam: resctrl: Add empty definitions for assorted resctrl functions Ben Horgan
2026-01-12 16:59 ` [PATCH v3 39/47] arm64: mpam: Select ARCH_HAS_CPU_RESCTRL Ben Horgan
2026-01-15 19:16 ` Catalin Marinas
2026-01-12 16:59 ` [PATCH v3 40/47] arm_mpam: resctrl: Call resctrl_init() on platforms that can support resctrl Ben Horgan
2026-01-12 16:59 ` [PATCH v3 41/47] arm_mpam: Generate a configuration for min controls Ben Horgan
2026-01-13 15:39 ` Jonathan Cameron
2026-01-30 14:17 ` Ben Horgan
2026-01-31 2:30 ` Shanker Donthineni
2026-02-02 10:21 ` Ben Horgan
2026-02-02 16:34 ` Shanker Donthineni
2026-02-03 9:33 ` Ben Horgan
2026-01-12 16:59 ` [PATCH v3 42/47] arm_mpam: resctrl: Add kunit test for mbw min control generation Ben Horgan
2026-01-13 15:43 ` Jonathan Cameron
2026-01-12 16:59 ` [PATCH v3 43/47] arm_mpam: Add quirk framework Ben Horgan
2026-01-19 12:14 ` Gavin Shan
2026-01-19 20:48 ` Ben Horgan
2026-01-12 16:59 ` [PATCH v3 44/47] arm_mpam: Add workaround for T241-MPAM-1 Ben Horgan
2026-01-19 12:16 ` Gavin Shan
2026-01-19 20:54 ` Ben Horgan
2026-01-12 16:59 ` [PATCH v3 45/47] arm_mpam: Add workaround for T241-MPAM-4 Ben Horgan
2026-01-15 23:20 ` Fenghua Yu
2026-01-19 20:56 ` Ben Horgan
2026-01-29 22:14 ` Fenghua Yu
2026-01-30 12:21 ` Ben Horgan
2026-01-12 16:59 ` [PATCH v3 46/47] arm_mpam: Add workaround for T241-MPAM-6 Ben Horgan
2026-01-12 16:59 ` [PATCH v3 47/47] arm_mpam: Quirk CMN-650's CSU NRDY behaviour Ben Horgan
2026-01-19 12:18 ` Gavin Shan
2026-01-19 20:58 ` Ben Horgan
2026-01-14 6:51 ` [PATCH RESEND v2 0/45] arm_mpam: Add KVM/arm64 and resctrl glue code Zeng Heng
2026-01-15 14:37 ` Ben Horgan
2026-01-15 11:14 ` [PATCH v3 00/47] " Peter Newman
2026-01-15 11:36 ` Ben Horgan
2026-01-16 10:47 ` Shaopeng Tan (Fujitsu)
2026-01-16 11:05 ` Ben Horgan
2026-01-16 15:47 ` (subset) " Catalin Marinas
2026-01-19 1:30 ` Gavin Shan
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