STRUCT ARCH_MBM_STATE(9)

🦋 struct arch_mbm_state(9) — bestie edition 🦋

okay so this is the manual page for struct arch_mbm_state, and it is literally the little struct that holds values used to compute resctrl_arch_rmid_read()'s return value. no cap, that's the whole assignment. 💅

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✨ NAME ✨

struct arch_mbm_state — values used to compute resctrl_arch_rmid_read()'s return value. periodt.

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✨ SYNOPSIS ✨

struct arch_mbm_state {
    u64 chunks;
    u64 prev_msr;
 };

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🎀 Members 🎀

• chunks — total data moved. bestie, you gotta multiply this by rdt_group.mon_scale to get bytes. that's the conversion, iykyk. 💖
• prev_msr — the value of IA32_QM_CTR last time it was read for the RMID used to find this struct. like, it remembers the last reading. iconic behavior honestly. ✨

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🌸 SEE ALSO 🌸

Kernel file ./arch/x86/kernel/cpu/resctrl/internal.h

• struct rdt_hw_ctrl_domain(9)
• struct rdt_hw_l3_mon_domain(9)
• struct rdt_perf_pkg_mon_domain(9)
• struct msr_param(9)
• struct rdt_hw_resource(9)

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🫶 friendly reminder: all the struct names and file paths up there are literal, so copy them exactly if you're hopping around the docs. no improvising, bestie. 💀

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and that's the page!! 🎀 this one comes from ./arch/x86/kernel/cpu/resctrl, dated October 2026, and it's serving struct arch_mbm_state(9) energy from start to finish. slay. 💜