resctrl_arch_config_cntr(9)

💅 resctrl_arch_config_cntr — kernel API manual, bestie edition ✨

okay so this is a page from the Kernel API Manual and it's all about resctrl_arch_config_cntr(9) — one function, and honestly? she's giving "small but mighty." let's get into it 🎀

---

🌸 NAME 🌸

resctrl_arch_config_cntr — configure the counter with its new RMID and event details. that's the whole vibe. no cap. 💖

---

🦋 SYNOPSIS 🦋

void resctrl_arch_config_cntr (struct rdt_resource *r , struct
rdt_l3_mon_domain *d , enum resctrl_event_id evtid , u32 rmid , u32
closid , u32 cntr_id , bool assign );

she takes seven args and returns nothing (void), which is so main character of her actually. 💅

---

✨ ARGUMENTS ✨

• r — the resource structure. the whole resource. her context, her world. 🫶
• d — the domain in which the counter with ID cntr_id should be configured. like, where this counter is gonna live, you know? 📍
• evtid — the monitoring event type (e.g., QOS_L3_MBM_TOTAL_EVENT_ID or QOS_L3_MBM_LOCAL_EVENT_ID). yes those are the exact names, type them exactly, i'm watching 👀
• rmid — RMID. that's it. that's the description. iconic minimalism honestly. ⭐
• closid — CLOSID. again — just the name. we love a low-effort king 💀
• cntr_id — the counter ID to configure. the girl herself 🔥
• assign — true to assign the counter or update an existing assignment, false to unassign the counter. binary queen 👑

---

💜 DESCRIPTION 💜

this can be called from any CPU. that's it. that's the whole section. she's flexible, she's portable, she does not care which CPU you're on 🌈✨

---

🎀 SEE ALSO 🎀

the whole friend group, in the order they were invited to the group chat 💌 — from the kernel file ./include/linux/resctrl.h:

• enum resctrl_conf_type(9)
• struct resctrl_staged_config(9)
• struct rdt_domain_hdr(9)
• struct rdt_ctrl_domain(9)
• struct mbm_cntr_cfg(9)
• struct rdt_l3_mon_domain(9)
• struct resctrl_cache(9)
• enum membw_throttle_mode(9)
• struct resctrl_membw(9)
• enum resctrl_schema_fmt(9)
• struct resctrl_mon(9)
• struct rdt_resource(9)
• struct resctrl_schema(9)
• resctrl_arch_sync_cpu_closid_rmid(9)
• resctrl_get_default_ctrl(9)
• resctrl_arch_mon_event_config_write(9)
• resctrl_arch_mon_event_config_read(9)
• resctrl_arch_mbm_cntr_assign_enabled(9)
• resctrl_arch_mbm_cntr_assign_set(9)
• resctrl_arch_rmid_read(9)
• resctrl_arch_rmid_read_context_check(9)
• resctrl_find_domain(9)
• resctrl_arch_reset_rmid(9)
• resctrl_arch_reset_rmid_all(9)
• resctrl_arch_reset_all_ctrls(9)
• resctrl_arch_cntr_read(9)
• resctrl_arch_reset_cntr(9)
• resctrl_arch_io_alloc_enable(9)
• resctrl_arch_get_io_alloc_enabled(9)

like, that's twenty-nine entries. i counted. every single one is here. you're welcome 🍓

---

ngl there's no warnings section on this page, but bestie please — keep the flags and types exactly as written. literally do not "improve" them. 🙈

---

okay that's the whole page!! and a lil sign-off for the credits, because we respect the metadata around here 🧚

this one lives in ./include/linux, dated October 2026, and it's filed under resctrl_arch_config_cntr(9) — periodt. 💅✨👑