ENUM MEMBW_THROTTLE_MODE(9)

💖 enum membw_throttle_mode — the kernel API manual page, bestie edition 💖

okay so you're looking at the enum membw_throttle_mode(9) page from the Kernel API Manual, and honestly? it's a tiny one but it's important. it's literally the enum that tells you what the system's memory bandwidth throttling mode is. main character energy for a three-value enum, i know, but stick with me 🫶

---

✨ NAME ✨

enum membw_throttle_mode — the system's memory bandwidth throttling mode</p>. that's the whole vibe. it's giving "small but mighty" 💅

---

🌸 SYNOPSIS 🌸

enum membw_throttle_mode {
    THREAD_THROTTLE_UNDEFINED ,
    THREAD_THROTTLE_MAX ,
    THREAD_THROTTLE_PER_THREAD

};

yes the spacing is exactly like that, don't come for me, i don't make the rules 😭

---

🎀 Constants 🎀

so there are exactly three values here, and each one has a whole personality:

• THREAD_THROTTLE_UNDEFINED — not relevant to the system. that's it. that's the whole description. it's the "no thoughts, head empty" option 🙈
• THREAD_THROTTLE_MAX — memory bandwidth is throttled at the core always, using the smallest bandwidth percentage assigned to threads, aka "max throttling". so like, the strictest setting. the core said "i'm watching you" 👀
• THREAD_THROTTLE_PER_THREAD — memory bandwidth is throttled at the thread 🔥. each thread gets its own throttling moment, okurrr

no cap, those three descriptions are word-for-word the meaning of the original — i'm just saying it with ✨feeling✨

---

🦋 SEE ALSO 🦋

okay this section ate, because there is so much here. the kernel file is ./include/linux/resctrl.h, and it's lowkey linked to the entire resctrl cinematic universe. like, the way this enum is connected to literally everything?? iconic. here's the full squad:

• 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)
• 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_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)

like i said. the whole universe. go read them, iykyk 💜

---

and that's the page!! 🎉 this little cutie lives in the kernel file ./include/linux, and this version is dated October 2026. slay, go forth and throttle responsibly, bestie 💖✨🎀🌷