exynos5_per...ounters_init(9)

💖 NAME 💖

okay bestie, welcome to the exynos5_per...ounters_init(9) page from the Kernel API Manual 💖

exynos5_performance_counters_init — Initializes performance DMC's counters

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✨ SYNOPSIS ✨

the whole signature vibe is:

int exynos5_performance_counters_init (struct exynos5_dmc *dmc );

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🎀 ARGUMENTS 🎀

• dmc — the DMC for which it does the setup 🫶

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🦋 DESCRIPTION 🦋

okay so this is the initialization of performance counters in the DMC for estimating usage ✨

the counter's values are used for calculation of a memory bandwidth, and based on that the governor changes the frequency 🌈

🚨 caveat bestie: the counters are not used when the governor is GOVERNOR_USERSPACE — periodt.

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🌈 SEE ALSO 🌈

go be nosy, the whole squad is here:

• Kernel file ./drivers/memory/samsung/exynos5422-dmc.c
• struct dmc_opp_table(9)
• struct exynos5_dmc(9)
• find_target_freq_idx(9)
• exynos5_switch_timing_regs(9)
• exynos5_init_freq_table(9)
• exynos5_set_bypass_dram_timings(9)
• exynos5_dram_change_timings(9)
• exynos5_dmc_align_target_voltage(9)
• exynos5_dmc_align_bypass_voltage(9)
• exynos5_dmc_align_bypass_dram_timings(9)
• exynos5_dmc_switch_to_bypass_configuration(9)
• exynos5_dmc_change_freq_and_volt(9)
• exynos5_dmc_get_volt_freq(9)
• exynos5_dmc_target(9)
• exynos5_counters_get(9)
• exynos5_dmc_start_perf_events(9)
• exynos5_dmc_perf_events_calc(9)
• exynos5_dmc_perf_events_check(9)
• exynos5_dmc_enable_perf_events(9)
• exynos5_dmc_disable_perf_events(9)
• exynos5_dmc_get_status(9)
• exynos5_dmc_get_cur_freq(9)
• exynos5_dmc_align_init_freq(9)
• create_timings_aligned(9)
• of_get_dram_timings(9)
• exynos5_dmc_init_clks(9)
• exynos5_dmc_set_pause_on_switching(9)
• exynos5_dmc_probe(9)
• exynos5_dmc_remove(9)

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mmkay bye bestie 💋 this page's source/version is ./drivers/memory/samsung, dated October 2026 — iconic. 🌸