From: Tony Luck <tony.luck@intel.com>
To: Fenghua Yu <fenghua.yu@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>,
Peter Newman <peternewman@google.com>,
James Morse <james.morse@arm.com>,
Babu Moger <babu.moger@amd.com>,
Drew Fustini <dfustini@baylibre.com>,
Dave Martin <Dave.Martin@arm.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
patches@lists.linux.dev, Tony Luck <tony.luck@intel.com>
Subject: [PATCH v17 0/9] Add support for Sub-NUMA cluster (SNC) systems
Date: Fri, 3 May 2024 13:33:16 -0700 [thread overview]
Message-ID: <20240503203325.21512-1-tony.luck@intel.com> (raw)
Note: Jump straight to patch 7 for the new stuff. Just minor tweaks in
other patches.
This series based on top of TIP x86/cache branch:
931be446c6cb ("x86/resctrl: Add tracepoint for llc_occupancy tracking")
The Sub-NUMA cluster feature on some Intel processors partitions the CPUs
that share an L3 cache into two or more sets. This plays havoc with the
Resource Director Technology (RDT) monitoring features. Prior to this
patch Intel has advised that SNC and RDT are incompatible.
Some of these CPUs support an MSR that can partition the RMID counters
in the same way. This allows monitoring features to be used. Legacy
monitoring files provide the sum of counters from each SNC node for
backwards compatibility. Additional files per SNC node provide details
per node.
Cache and memory bandwidth allocation features continue to operate at
the scope of the L3 cache.
Signed-off-by: Tony Luck <tony.luck@intel.com>
---
Changes since v16: https://lore.kernel.org/all/20240312214247.91772-1-tony.luck@intel.com/
Patch 1: Reinette pointed out that rdt_find_domain() no longer returns ERR_PTR()
but one of the callers was still checking return with IS_ERR().
Patch 2: Tip tree added a tracing patch. That needed s/d->id/d->hdr.id/
Patch 3: Reinette: Keep the "RCU" in the kerneldoc description of the
domain list fields after the split into separate ctrl/mon lists.
Patch 4: No change
Patch 5: No change
Patch 6: Drop the change that divided output of the resctrl "size" file
by the number of SNC domains per L3 cache. Now that this series
preserves the contents of the legacy llc_occupancy files this isn't
useful.
Patch 7: NEW in this series. Add per-SNC domain monitor files while
making the original files sum across SNC nodes.
Patch 8: (formerly 7) No change
Patch 9: (formerly 8) Add documentation for new per-SNC directories and files
Tony Luck (9):
x86/resctrl: Prepare for new domain scope
x86/resctrl: Prepare to split rdt_domain structure
x86/resctrl: Prepare for different scope for control/monitor
operations
x86/resctrl: Split the rdt_domain and rdt_hw_domain structures
x86/resctrl: Add node-scope to the options for feature scope
x86/resctrl: Introduce snc_nodes_per_l3_cache
x86/resctrl: Add new monitor files for Sub-NUMA cluster (SNC)
monitoring
x86/resctrl: Sub NUMA Cluster detection and enable
x86/resctrl: Update documentation with Sub-NUMA cluster changes
Documentation/arch/x86/resctrl.rst | 17 +
include/linux/resctrl.h | 89 +++--
arch/x86/include/asm/msr-index.h | 1 +
arch/x86/kernel/cpu/resctrl/internal.h | 72 ++--
arch/x86/kernel/cpu/resctrl/core.c | 430 ++++++++++++++++++----
arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 57 +--
arch/x86/kernel/cpu/resctrl/monitor.c | 98 +++--
arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 26 +-
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 263 ++++++++-----
9 files changed, 759 insertions(+), 294 deletions(-)
base-commit: 931be446c6cbc15691dd499957e961f4e1d56afb
--
2.44.0
next reply other threads:[~2024-05-03 20:33 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-03 20:33 Tony Luck [this message]
2024-05-03 20:33 ` [PATCH v17 1/9] x86/resctrl: Prepare for new domain scope Tony Luck
2024-05-03 20:33 ` [PATCH v17 2/9] x86/resctrl: Prepare to split rdt_domain structure Tony Luck
2024-05-03 20:33 ` [PATCH v17 3/9] x86/resctrl: Prepare for different scope for control/monitor operations Tony Luck
2024-05-03 20:33 ` [PATCH v17 4/9] x86/resctrl: Split the rdt_domain and rdt_hw_domain structures Tony Luck
2024-05-03 20:33 ` [PATCH v17 5/9] x86/resctrl: Add node-scope to the options for feature scope Tony Luck
2024-05-03 20:33 ` [PATCH v17 6/9] x86/resctrl: Introduce snc_nodes_per_l3_cache Tony Luck
2024-05-03 20:33 ` [PATCH v17 7/9] x86/resctrl: Add new monitor files for Sub-NUMA cluster (SNC) monitoring Tony Luck
2024-05-10 21:24 ` Reinette Chatre
2024-05-13 17:05 ` Tony Luck
2024-05-13 18:53 ` Reinette Chatre
2024-05-14 0:21 ` Tony Luck
2024-05-14 15:08 ` Reinette Chatre
2024-05-14 18:26 ` Luck, Tony
2024-05-14 20:30 ` Reinette Chatre
2024-05-14 21:53 ` Tony Luck
2024-05-15 16:47 ` Reinette Chatre
2024-05-15 17:23 ` Tony Luck
2024-05-15 18:48 ` Reinette Chatre
2024-05-03 20:33 ` [PATCH v17 8/9] x86/resctrl: Sub NUMA Cluster detection and enable Tony Luck
2024-05-10 21:24 ` Reinette Chatre
2024-05-13 17:17 ` Tony Luck
2024-05-13 18:53 ` Reinette Chatre
2024-05-14 0:28 ` Tony Luck
2024-05-03 20:33 ` [PATCH v17 9/9] x86/resctrl: Update documentation with Sub-NUMA cluster changes Tony Luck
2024-05-14 15:02 ` [PATCH v17 0/9] Add support for Sub-NUMA cluster (SNC) systems Maciej Wieczor-Retman
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=20240503203325.21512-1-tony.luck@intel.com \
--to=tony.luck@intel.com \
--cc=Dave.Martin@arm.com \
--cc=babu.moger@amd.com \
--cc=dfustini@baylibre.com \
--cc=fenghua.yu@intel.com \
--cc=james.morse@arm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=maciej.wieczor-retman@intel.com \
--cc=patches@lists.linux.dev \
--cc=peternewman@google.com \
--cc=reinette.chatre@intel.com \
--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 read-only IMAP folder(s) and NNTP newsgroup(s).