LIBPFM(3)

💖 LIBPFM(3) 💖

okay bestie, so this is a page from the Linux Programmer's Manual — it's LIBPFM(3), and we're about to get so acquainted 🫶

✨ NAME ✨

libpfm_arm_ac15 — the whole entire vibe here is support for Arm Cortex A15 PMU 💅

🌸 SYNOPSIS 🌸

like, just pull it in, bestie:

#include <perfmon/pfmlib.h>

and then the deets:

PMU name: arm_ac15
PMU desc: ARM Cortex A15

🎀 copy those two lines exactly, okay? arm_ac15 is the name the library answers to, no nicknames.

🦋 DESCRIPTION 🦋

So the library supports the ARM Cortex A15 core PMU. That's it, that's the assignment, and it ate 💅

This PMU supports 6 counters and privilege levels filtering. Six! Counters! Filtering! We love a modest but capable queen 👑

🎀 MODIFIERS 🎀

These are the modifiers supported on ARM Cortex A15, and they're all boolean, meaning it's a yes/no situation, no in-between, periodt:

• u — measure at the user level. This corresponds to PFM_PLM3. It's a boolean modifier. 🌈
• k — measure at the kernel level. This corresponds to PFM_PLM0. Also a boolean modifier. ✨
• hv — measure at the hypervisor level. This corresponds to PFM_PLMH. Yep, boolean modifier too. 💜

🙈 not me reminding you again: all three are boolean modifiers, so don't go trying to feed them values like it's a number situation. It is not.

👑 AUTHORS 👑

• Stephane Eranian <eranian@gmail.com>

and that's the whole page, bestie, you understood it perfectly, I'm obsessed 😭💖 this was LIBPFM(3), from the Linux Programmer's Manual, and it was dated August, 2012 — yeah I know, ancient, but iconic behaviour never expires ⭐ slay, go forth and profile responsibly 🧚