[PATCH v9 3/9] x86/resctrl: Modify update_mba_bw() to use per ctrl_mon group event

Tony Luck
2024-11-14T00:17:21Z

Instead of hard-coding the memory bandwidth local event as the
input to the mba_sc feedback look, use the event that the user
configured for each ctrl_mon group.

Signed-off-by: Tony Luck <tony.luck@intel.com>
---
arch/x86/kernel/cpu/resctrl/monitor.c | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index 7ef1a293cc13..2176e355e864 100644
--- a/arch/x86/kernel/cpu/resctrl/monitor.c
+++ b/arch/x86/kernel/cpu/resctrl/monitor.c
@@ -752,20 +752,31 @@ static void update_mba_bw(struct rdtgroup *rgrp, struct rdt_mon_domain *dom_mbm)
u32 closid, rmid, cur_msr_val, new_msr_val;
struct mbm_state *pmbm_data, *cmbm_data;
struct rdt_ctrl_domain *dom_mba;
+ enum resctrl_event_id evt_id;
struct rdt_resource *r_mba;
- u32 cur_bw, user_bw, idx;
struct list_head *head;
struct rdtgroup *entry;
+ u32 cur_bw, user_bw;

- if (!is_mbm_local_enabled())
+ if (!is_mbm_enabled())
return;

r_mba = &rdt_resources_all[RDT_RESOURCE_MBA].r_resctrl;
+ evt_id = rgrp->mba_mbps_event;
+
+ if (WARN_ON_ONCE(!is_mbm_event(evt_id)))
+ return;
+ if (WARN_ON_ONCE(evt_id == QOS_L3_MBM_LOCAL_EVENT_ID && !is_mbm_local_enabled()))
+ return;
+ if (WARN_ON_ONCE(evt_id == QOS_L3_MBM_TOTAL_EVENT_ID && !is_mbm_total_enabled()))
+ return;
+

closid = rgrp->closid;
rmid = rgrp->mon.rmid;
- idx = resctrl_arch_rmid_idx_encode(closid, rmid);
- pmbm_data = &dom_mbm->mbm_local[idx];
+ pmbm_data = get_mbm_state(dom_mbm, closid, rmid, evt_id);
+ if (WARN_ON_ONCE(!pmbm_data))
+ return;

dom_mba = get_ctrl_domain_from_cpu(smp_processor_id(), r_mba);
if (!dom_mba) {
@@ -784,7 +795,9 @@ static void update_mba_bw(struct rdtgroup *rgrp, struct rdt_mon_domain *dom_mbm)
*/
head = &rgrp->mon.crdtgrp_list;
list_for_each_entry(entry, head, mon.crdtgrp_list) {
- cmbm_data = &dom_mbm->mbm_local[entry->mon.rmid];
+ cmbm_data = get_mbm_state(dom_mbm, entry->closid, entry->mon.rmid, evt_id);
+ if (WARN_ON_ONCE(!cmbm_data))
+ return;
cur_bw += cmbm_data->prev_bw;
}

--
2.47.0