Tested the series on AMD systems and ran few basic tests. Everything looks
good. Thanks.
Tested-by: Babu Moger <babu.moger@amd.com>
On 6/28/24 16:56, Tony Luck wrote:
> This series based on top of tip x86/cache commit f385f0246394
> ("x86/resctrl: Replace open coded cacheinfo searches")
>
> 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.
>
> Memory bandwidth allocation features continue to operate at
> the scope of the L3 cache.
>
> L3 cache occupancy and allocation operate on the portion of
> L3 cache available for each SNC node.
>
> Signed-off-by: Tony Luck <tony.luck@intel.com>
>
> ---
> Changes since v21: https://lore.kernel.org/all/20240627203856.66628-1-tony.luck@intel.com/
>
> No net code changes (final version v23 == v22)
>
> * Patch 9 split into two (9 & 10 in this series) Added Reinette's Reviewed-by tag to both.
> * Added Reinette's Reviewed-by tag to parts 15 & 16 (were 14, 15 in v22)
>
> Tony Luck (19):
> 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: Block use of mba_MBps mount option on Sub-NUMA Cluster
> (SNC) systems
> x86/resctrl: Prepare for new Sub-NUMA Cluster (SNC) monitor files
> x86/resctrl: Add a new field to struct rmid_read for summation of
> domains
> x86/resctrl: Initialize on-stack struct rmid_read instances
> x86/resctrl: Refactor mkdir_mondata_subdir() with a helper function
> x86/resctrl: Allocate a new field in union mon_data_bits
> x86/resctrl: Create Sub-NUMA Cluster (SNC) monitor files
> x86/resctrl: Handle removing directories in Sub-NUMA Cluster (SNC)
> mode
> x86/resctrl: Fill out rmid_read structure for smp_call*() to read a
> counter
> x86/resctrl: Make __mon_event_count() handle sum domains
> x86/resctrl: Enable shared RMID mode on Sub-NUMA Cluster (SNC) systems
> x86/resctrl: Sub-NUMA Cluster (SNC) detection
> x86/resctrl: Update documentation with Sub-NUMA cluster changes
>
> Documentation/arch/x86/resctrl.rst | 27 ++
> include/linux/resctrl.h | 88 ++++--
> arch/x86/include/asm/msr-index.h | 1 +
> arch/x86/kernel/cpu/resctrl/internal.h | 108 +++++---
> arch/x86/kernel/cpu/resctrl/core.c | 312 ++++++++++++++++------
> arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 89 +++---
> arch/x86/kernel/cpu/resctrl/monitor.c | 256 +++++++++++++++---
> arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 27 +-
> arch/x86/kernel/cpu/resctrl/rdtgroup.c | 281 ++++++++++++-------
> 9 files changed, 865 insertions(+), 324 deletions(-)
>
>
> base-commit: f385f024639431bec3e70c33cdbc9563894b3ee5
--
Thanks
Babu Moger