From: Tony Luck <tony.luck@intel.com>
To: Babu Moger <babu.moger@amd.com>
Cc: corbet@lwn.net, fenghua.yu@intel.com, reinette.chatre@intel.com,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
paulmck@kernel.org, rdunlap@infradead.org, tj@kernel.org,
peterz@infradead.org, yanjiewtw@gmail.com, kim.phillips@amd.com,
lukas.bulwahn@gmail.com, seanjc@google.com, jmattson@google.com,
leitao@debian.org, jpoimboe@kernel.org,
rick.p.edgecombe@intel.com, kirill.shutemov@linux.intel.com,
jithu.joseph@intel.com, kai.huang@intel.com,
kan.liang@linux.intel.com, daniel.sneddon@linux.intel.com,
pbonzini@redhat.com, sandipan.das@amd.com,
ilpo.jarvinen@linux.intel.com, peternewman@google.com,
maciej.wieczor-retman@intel.com, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, eranian@google.com,
james.morse@arm.com
Subject: Re: [PATCH v8 08/25] x86/resctrl: Introduce interface to display number of monitoring counters
Date: Wed, 9 Oct 2024 15:49:53 -0700 [thread overview]
Message-ID: <ZwcIkf_oy2oKByNu@agluck-desk3.sc.intel.com> (raw)
In-Reply-To: <c79fdf4196d974325df995eb334221463747689e.1728495588.git.babu.moger@amd.com>
On Wed, Oct 09, 2024 at 12:39:33PM -0500, Babu Moger wrote:
> +"num_mbm_cntrs":
> + The number of monitoring counters available for assignment when the
> + architecture supports mbm_cntr_assign mode.
It's not obvious (to me) how these counters work. When I create
a group with both local and total monitoring enabled, does that
use up two counters (even though I only used up one RMID)?
Are the counters multi-purpose. E.g. if I disable local counting
on all groups, are the freed-up counters available for use to
count total bandwidth on some additional groups?
From the examples it looks like if there are free counters
available when user does mkdir, then they will be assigned
to the new rdtgroup. If only one counter is free, does it
get assigned to local or total?
Thanks
-Tony
next prev parent reply other threads:[~2024-10-09 22:49 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-09 17:39 [PATCH v8 00/25] x86/resctrl : Support AMD Assignable Bandwidth Monitoring Counters (ABMC) Babu Moger
2024-10-09 17:39 ` [PATCH v8 01/25] x86/cpufeatures: Add support for " Babu Moger
2024-10-09 17:39 ` [PATCH v8 02/25] x86/resctrl: Add ABMC feature in the command line options Babu Moger
2024-10-16 3:06 ` Reinette Chatre
2024-10-09 17:39 ` [PATCH v8 03/25] x86/resctrl: Consolidate monitoring related data from rdt_resource Babu Moger
2024-10-09 17:39 ` [PATCH v8 04/25] x86/resctrl: Detect Assignable Bandwidth Monitoring feature details Babu Moger
2024-10-16 3:06 ` Reinette Chatre
2024-10-09 17:39 ` [PATCH v8 05/25] x86/resctrl: Introduce resctrl_file_fflags_init() to initialize fflags Babu Moger
2024-10-09 17:39 ` [PATCH v8 06/25] x86/resctrl: Add support to enable/disable AMD ABMC feature Babu Moger
2024-10-11 18:14 ` Tony Luck
2024-10-11 20:53 ` Moger, Babu
2024-10-16 3:07 ` Reinette Chatre
2024-10-09 17:39 ` [PATCH v8 07/25] x86/resctrl: Introduce the interface to display monitor mode Babu Moger
2024-10-09 22:42 ` Tony Luck
2024-10-10 14:54 ` Moger, Babu
2024-10-10 15:07 ` Luck, Tony
2024-10-10 15:30 ` Moger, Babu
2024-10-10 16:02 ` Luck, Tony
2024-10-11 22:24 ` Reinette Chatre
2024-10-14 15:16 ` Moger, Babu
2024-10-16 3:12 ` Reinette Chatre
2024-10-16 15:57 ` Moger, Babu
2024-10-16 16:25 ` Reinette Chatre
2024-10-09 17:39 ` [PATCH v8 08/25] x86/resctrl: Introduce interface to display number of monitoring counters Babu Moger
2024-10-09 22:49 ` Tony Luck [this message]
2024-10-10 15:12 ` Moger, Babu
2024-10-10 15:58 ` Luck, Tony
2024-10-10 16:57 ` Moger, Babu
2024-10-10 17:08 ` Luck, Tony
2024-10-10 18:36 ` Moger, Babu
2024-10-10 18:57 ` Luck, Tony
2024-10-10 20:32 ` Moger, Babu
2024-10-11 17:44 ` Tony Luck
2024-10-11 20:49 ` Moger, Babu
2024-10-11 21:36 ` Tony Luck
2024-10-14 16:46 ` Reinette Chatre
2024-10-14 17:20 ` Moger, Babu
2024-10-14 17:49 ` Luck, Tony
2024-10-14 19:21 ` Moger, Babu
2024-10-14 19:51 ` Luck, Tony
2024-10-14 20:05 ` Reinette Chatre
2024-10-14 20:32 ` Moger, Babu
2024-10-24 17:29 ` Moger, Babu
2024-10-24 17:37 ` Luck, Tony
2024-10-25 20:31 ` Moger, Babu
2024-10-14 16:59 ` Reinette Chatre
2024-10-14 19:23 ` Moger, Babu
2024-10-14 16:25 ` Reinette Chatre
2024-10-14 17:46 ` Moger, Babu
2024-10-14 18:30 ` Reinette Chatre
2024-10-14 18:51 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 09/25] x86/resctrl: Add __init attribute to dom_data_init() Babu Moger
2024-10-16 3:13 ` Reinette Chatre
2024-10-16 17:32 ` Moger, Babu
2024-10-16 18:55 ` Reinette Chatre
2024-10-16 20:18 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 10/25] x86/resctrl: Introduce bitmap mbm_cntr_free_map to track assignable counters Babu Moger
2024-10-16 3:14 ` Reinette Chatre
2024-10-17 16:55 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 11/25] x86/resctrl: Introduce mbm_total_cfg and mbm_local_cfg in struct rdt_hw_mon_domain Babu Moger
2024-10-16 3:15 ` Reinette Chatre
2024-10-09 17:39 ` [PATCH v8 12/25] x86/resctrl: Remove MSR reading of event configuration value Babu Moger
2024-10-16 3:16 ` Reinette Chatre
2024-10-17 17:59 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 13/25] x86/resctrl: Introduce mbm_cntr_map to track assignable counters at domain Babu Moger
2024-10-16 3:19 ` Reinette Chatre
2024-10-09 17:39 ` [PATCH v8 14/25] x86/resctrl: Add data structures and definitions for ABMC assignment Babu Moger
2024-10-16 3:21 ` Reinette Chatre
2024-10-17 18:52 ` Moger, Babu
2024-10-17 21:13 ` Reinette Chatre
2024-10-17 23:02 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 15/25] x86/resctrl: Introduce cntr_id in mongroup for assignments Babu Moger
2024-10-16 3:22 ` Reinette Chatre
2024-10-17 19:19 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 16/25] x86/resctrl: Implement resctrl_arch_config_cntr() to assign a counter with ABMC Babu Moger
2024-10-16 3:23 ` Reinette Chatre
2024-10-17 22:44 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 17/25] x86/resctrl: Add the interface to assign/update counter assignment Babu Moger
2024-10-16 3:25 ` Reinette Chatre
2024-10-17 22:56 ` Moger, Babu
2024-10-18 15:59 ` Reinette Chatre
2024-10-21 14:40 ` Moger, Babu
2024-10-21 15:31 ` Reinette Chatre
2024-10-22 1:15 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 18/25] x86/resctrl: Add the interface to unassign a MBM counter Babu Moger
2024-10-16 3:29 ` Reinette Chatre
2024-10-17 23:11 ` Moger, Babu
2024-10-18 16:06 ` Reinette Chatre
2024-10-09 17:39 ` [PATCH v8 19/25] x86/resctrl: Auto assign/unassign counters when mbm_cntr_assign is enabled Babu Moger
2024-10-11 17:17 ` Tony Luck
2024-10-11 21:17 ` Moger, Babu
2024-10-11 21:33 ` Luck, Tony
2024-10-14 15:43 ` Moger, Babu
2024-10-14 16:18 ` Luck, Tony
2024-10-14 16:35 ` Moger, Babu
2024-10-15 2:39 ` Reinette Chatre
2024-10-15 15:43 ` Moger, Babu
2024-10-15 16:57 ` Luck, Tony
2024-10-15 17:18 ` Reinette Chatre
2024-10-15 20:42 ` Moger, Babu
2024-10-16 3:30 ` Reinette Chatre
2024-10-18 14:22 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 20/25] x86/resctrl: Report "Unassigned" for MBM events in mbm_cntr_assign mode Babu Moger
2024-10-11 17:23 ` Tony Luck
2024-10-11 21:21 ` Moger, Babu
2024-10-16 3:31 ` Reinette Chatre
2024-10-18 14:31 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 21/25] x86/resctrl: Introduce the interface to switch between monitor modes Babu Moger
2024-10-16 3:36 ` Reinette Chatre
2024-10-18 15:13 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 22/25] x86/resctrl: Configure mbm_cntr_assign mode if supported Babu Moger
2024-10-09 17:39 ` [PATCH v8 23/25] x86/resctrl: Update assignments on event configuration changes Babu Moger
2024-10-16 3:40 ` Reinette Chatre
2024-10-18 15:50 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 24/25] x86/resctrl: Introduce interface to list assignment states of all the groups Babu Moger
2024-10-16 3:40 ` Reinette Chatre
2024-10-21 14:56 ` Moger, Babu
2024-10-09 17:39 ` [PATCH v8 25/25] x86/resctrl: Introduce interface to modify assignment states of " Babu Moger
2024-10-16 3:43 ` Reinette Chatre
2024-10-21 17:04 ` Moger, Babu
2024-10-21 17:20 ` Reinette Chatre
2024-10-22 1:12 ` Moger, Babu
2024-10-16 3:05 ` [PATCH v8 00/25] x86/resctrl : Support AMD Assignable Bandwidth Monitoring Counters (ABMC) Reinette Chatre
2024-10-21 17:09 ` Moger, Babu
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