The "mbm_event" mode allows the user to assign a hardware counter ID to
an RMID, event pair and monitor the bandwidth as long as it is assigned.
Additionally, the user can specify a particular type of memory
transactions for the counter to track.
By default, each resctrl group supports two MBM events: mbm_total_bytes
and mbm_local_bytes. Each event corresponds to an MBM configuration that
specifies the memory transactions being tracked by the event.
Add definitions for supported memory transactions (e.g., read, write,
etc.).
Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
---
v14: Changed the term memory events to memory transactions to be consistant.
Changed the name of the structure to mbm_config_value(from mbm_evt_value).
Changed name to memory trasactions where applicable.
Changes subject line to fs/resctrl.
v13: Updated the changelog.
Removed the definitions from resctrl_types.h and moved to internal.h.
Removed mbm_assign_config definition. Configurations will be part of
mon_evt list.
Resolved conflicts caused by the recent FS/ARCH code restructure.
The rdtgroup.c file has now been split between the FS and ARCH directories.
v12: New patch to support event configurations via new counter_configs
method.
---
fs/resctrl/internal.h | 11 +++++++++++
fs/resctrl/rdtgroup.c | 14 ++++++++++++++
2 files changed, 25 insertions(+)
diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h
index 4a7130018aa1..84a136194d9a 100644
--- a/fs/resctrl/internal.h
+++ b/fs/resctrl/internal.h
@@ -212,6 +212,17 @@ struct rdtgroup {
struct pseudo_lock_region *plr;
};
+/**
+ * struct mbm_config_value - Memory transaction an MBM event can be configured with.
+ * @name: Name of memory transaction (read, write ...).
+ * @val: The bit used to represent the memory transaction within an
+ * event's configuration.
+ */
+struct mbm_config_value {
+ char name[32];
+ u32 val;
+};
+
/* rdtgroup.flags */
#define RDT_DELETED 1
diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c
index 08bcca9bd8b6..5fb6a9939e23 100644
--- a/fs/resctrl/rdtgroup.c
+++ b/fs/resctrl/rdtgroup.c
@@ -75,6 +75,20 @@ static void rdtgroup_destroy_root(void);
struct dentry *debugfs_resctrl;
+/* Number of memory transactions that an MBM event can be configured with. */
+#define NUM_MBM_EVT_VALUES 7
+
+/* Decoded values for each type of memory transactions */
+struct mbm_config_value mbm_config_values[NUM_MBM_EVT_VALUES] = {
+ {"local_reads", READS_TO_LOCAL_MEM},
+ {"remote_reads", READS_TO_REMOTE_MEM},
+ {"local_non_temporal_writes", NON_TEMP_WRITE_TO_LOCAL_MEM},
+ {"remote_non_temporal_writes", NON_TEMP_WRITE_TO_REMOTE_MEM},
+ {"local_reads_slow_memory", READS_TO_LOCAL_S_MEM},
+ {"remote_reads_slow_memory", READS_TO_REMOTE_S_MEM},
+ {"dirty_victim_writes_all", DIRTY_VICTIMS_TO_ALL_MEM},
+};
+
/*
* Memory bandwidth monitoring event to use for the default CTRL_MON group
* and each new CTRL_MON group created by the user. Only relevant when
--
2.34.1
