diff options
| author | Babu Moger <babu.moger@amd.com> | 2023-01-13 09:20:36 -0600 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-01-23 17:40:27 +0100 |
| commit | 73afb2d3ce2d7e0f9eee14e3f2b53d2bbfefd9c8 (patch) | |
| tree | 73026bf75786e97ef618b7a6c7beeb27d1a9738a | |
| parent | dc2a3e857981f859889933cf66ded117d74edff1 (diff) | |
x86/resctrl: Add interface to read mbm_local_bytes_config
The event configuration can be viewed by the user by reading the configuration
file /sys/fs/resctrl/info/L3_MON/mbm_local_bytes_config. The event
configuration settings are domain specific and will affect all the CPUs in the
domain.
Following are the types of events supported:
==== ===========================================================
Bits Description
==== ===========================================================
6 Dirty Victims from the QOS domain to all types of memory
5 Reads to slow memory in the non-local NUMA domain
4 Reads to slow memory in the local NUMA domain
3 Non-temporal writes to non-local NUMA domain
2 Non-temporal writes to local NUMA domain
1 Reads to memory in the non-local NUMA domain
0 Reads to memory in the local NUMA domain
==== ===========================================================
By default, the mbm_local_bytes_config is set to 0x15 to count all the local
event types.
For example:
$cat /sys/fs/resctrl/info/L3_MON/mbm_local_bytes_config
0=0x15;1=0x15;2=0x15;3=0x15
In this case, the event mbm_local_bytes is configured with 0x15 on
domains 0 to 3.
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/r/20230113152039.770054-11-babu.moger@amd.com
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/monitor.c | 4 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/rdtgroup.c | 16 |
2 files changed, 19 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c index 0ff45e34d83c..28c65008fce1 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -805,8 +805,10 @@ int __init rdt_get_mon_l3_config(struct rdt_resource *r) mbm_total_event.configurable = true; mbm_config_rftype_init("mbm_total_bytes_config"); } - if (rdt_cpu_has(X86_FEATURE_CQM_MBM_LOCAL)) + if (rdt_cpu_has(X86_FEATURE_CQM_MBM_LOCAL)) { mbm_local_event.configurable = true; + mbm_config_rftype_init("mbm_local_bytes_config"); + } } l3_mon_evt_init(r); diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c index cd4e668e5019..ad3c7014adf6 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -1507,6 +1507,16 @@ static int mbm_total_bytes_config_show(struct kernfs_open_file *of, return 0; } +static int mbm_local_bytes_config_show(struct kernfs_open_file *of, + struct seq_file *seq, void *v) +{ + struct rdt_resource *r = of->kn->parent->priv; + + mbm_config_show(seq, r, QOS_L3_MBM_LOCAL_EVENT_ID); + + return 0; +} + /* rdtgroup information files for one cache resource. */ static struct rftype res_common_files[] = { { @@ -1612,6 +1622,12 @@ static struct rftype res_common_files[] = { .seq_show = mbm_total_bytes_config_show, }, { + .name = "mbm_local_bytes_config", + .mode = 0444, + .kf_ops = &rdtgroup_kf_single_ops, + .seq_show = mbm_local_bytes_config_show, + }, + { .name = "cpus", .mode = 0644, .kf_ops = &rdtgroup_kf_single_ops, |