cppc_get_perf_caps(9)

🌸 NAME 🌸

okay so bestie, this is cppc_get_perf_caps(9) from the Kernel API Manual, and it is literally the “Get a CPU’s performance capabilities” moment. no cap ✨

✨ SYNOPSIS ✨

int cppc_get_perf_caps (int cpunum , struct cppc_perf_caps *perf_caps );

🎀 ARGUMENTS 🎀

• cpunum — the CPU from which to get capabilities info. like, which CPU are we checking on 💅
• perf_caps — ptr to cppc_perf_caps. See cppc_acpi.h. 🫶

🔥 RETURN 🔥

0 for success with perf_caps populated, else -ERRNO. periodt. 💖

🦋 SEE ALSO 🦋

the kernel file ./drivers/acpi/cppc_acpi.c is the main character here, and these related pages are the whole group chat:

• acpi_get_psd_map(9)
• cpc_ffh_supported(9)
• cpc_supported_by_cpu(9)
• pcc_data_alloc(9)
• acpi_cppc_processor_probe(9)
• acpi_cppc_processor_exit(9)
• cpc_read_ffh(9)
• cpc_read_ffh_fb_ctrs(9)
• cpc_write_ffh(9)
• cppc_get_desired_perf(9)
• cppc_get_nominal_perf(9)
• cppc_get_highest_perf(9)
• cppc_get_epp_perf(9)
• cppc_perf_ctrs_in_pcc_cpu(9)
• cppc_perf_ctrs_in_pcc(9)
• cppc_get_perf_ctrs(9)
• cppc_set_epp(9)
• cppc_get_auto_act_window(9)
• cppc_set_auto_act_window(9)
• cppc_get_auto_sel(9)
• cppc_set_auto_sel(9)
• cppc_set_enable(9)
• cppc_get_perf(9)
• cppc_set_perf(9)
• cppc_get_perf_limited(9)
• cppc_set_perf_limited(9)
• cppc_get_transition_latency(9)

mwah 💋 sourced from ./drivers/acpi, dated October 2026 — ok bye bestie, go check cppc_acpi.h 🎀