STRUCT RESCTRL_MON(9)

struct resctrl_mon(9)

okay so this page is from the Kernel API Manual, and it's literally about struct resctrl_mon — the monitoring-related data of a resctrl resource. bestie, it's giving “kernel struct with a whole monitoring side quest” energy 💅✨. Manual name? folded in right here so we can skip the boring header line, periodt.

💖 NAME 💖

struct resctrl_mon — monitoring related data of a resctrl resource. no cap, that's the whole name, and it ate.

✨ SYNOPSIS ✨

here's the struct, verbatim, because we do not mess with code in this group chat 🫶:

struct resctrl_mon {
    u32 num_rmid;
    unsigned int            mbm_cfg_mask;
    int num_mbm_cntrs;
    bool mbm_cntr_assignable;
    bool mbm_assign_on_mkdir;
    bool mbm_cntr_configurable;
    bool mbm_cntr_assign_fixed;
 };

bestie, every field in this block is real—no invented options, no extra lore, fr fr.

🫶 Members 🫶

• num_rmid — Number of RMIDs available. that's the count, iconic.
• mbm_cfg_mask — Memory transactions that can be tracked when bandwidth monitoring events can be configured. lowkey a mouthful, but that's the fact.
• num_mbm_cntrs — Number of assignable counters. periodt.
• mbm_cntr_assignable — Is system capable of supporting counter assignment? the struct is literally asking.
• mbm_assign_on_mkdir — True if counters should automatically be assigned to MBM events of monitor groups created via mkdir. automatic assignment vibe.
• mbm_cntr_configurable — True if assignable counters are configurable. yup.
• mbm_cntr_assign_fixed — True if the counter assignment mode is fixed. fixed-mode flag, slay.

🔥 SEE ALSO 🔥

the whole related-page friend group, plus the kernel file itself — go read, iykyk:

• 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 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_config_cntr(9)
• resctrl_arch_cntr_read(9)
• resctrl_arch_reset_cntr(9)
• resctrl_arch_io_alloc_enable(9)
• resctrl_arch_get_io_alloc_enabled(9)

okay that's the page, bestie — source/version: ./include/linux, date: October 2026, and struct resctrl_mon(9) is out here with main character energy. 💖🫶✨