PMC.UCF(3)

🦋 pmc.ucf (PMC.UCF(3)) — measurement events for Intel uncore fixed function performance counters 🦋

Okay bestie, welcome to the Library Functions Manual page for pmc.ucf (PMC.UCF(3)): measurement events for Intel uncore fixed function performance counters. We are gonna go through every little detail together, periodt. 💅

🌸 NAME 🌸

pmc.ucf — measurement events for Intel uncore fixed function performance counters. Slay. 💖

📚 LIBRARY 📚

Performance Counters Library (libpmc, -lpmc) — yes, that's the one, bestie. 🫶

✨ SYNOPSIS ✨

#include <pmc.h>

💖 DESCRIPTION 💖

Okay so each fixed-function PMC measures a specific hardware event. The number of fixed-function PMCs implemented in a CPU can vary. The number of fixed-function PMCs present can be determined at runtime by using function pmc_cpuinfo(3). Highkey useful. 🔥

Intel uncore fixed-function PMCs are documented in “Volume 3B: System Programming Guide, Part 2”, Intel(R) 64 and IA-32 Architectures Software Developes Manual, Order Number: 253669-033US, Intel Corporation, December 2009. That's the source, no cap. 📚

💫 PMC Capabilities 💫

Fixed-function PMCs support the following capabilities, bestie:

• PMC_CAP_CASCADE — support: No.
• PMC_CAP_EDGE — support: No.
• PMC_CAP_INTERRUPT — support: No.
• PMC_CAP_INVERT — support: No.
• PMC_CAP_READ — support: Yes.
• PMC_CAP_PRECISE — support: No.
• PMC_CAP_SYSTEM — support: No.
• PMC_CAP_TAGGING — support: No.
• PMC_CAP_THRESHOLD — support: No.
• PMC_CAP_USER — support: No.
• PMC_CAP_WRITE — support: Yes.

🎀 Class Name Prefix 🎀

These PMCs are named using a class name prefix of ucf-. Cute. 🎀

🌈 Event Specifiers (Fixed Function PMCs) 🌈

The fixed function PMCs are selectable using the following event names:

• UCLOCK (Fixed Function Counter 0) — the fixed-function uncore counter increments at the rate of the U-clock. The frequency of the uncore clock domain can be determined from the uncore clock ratio which is available in the PCI configuration space register at offset C0H under device number 0 and Function 0. Iykyk. 🔥

👀 SEE ALSO 👀

Go read these too, bestie:

• pmc(3)
• pmc.amd(3)
• pmc.atom(3)
• pmc.core(3)
• pmc.core2(3)
• pmc.corei7(3)
• pmc.corei7uc(3)
• pmc.iaf(3)
• pmc.soft(3)
• pmc.tsc(3)
• pmc.westmere(3)
• pmc.westmereuc(3)
• pmc_cpuinfo(3)
• pmclog(3)
• hwpmc(4)

📜 HISTORY 📜

The pmc library first appeared in FreeBSD 6.0. ⭐

👑 AUTHORS 👑

The Performance Counters Library (libpmc, -lpmc) library was written by Joseph Koshy <jkoshy@FreeBSD.org>. Iconic. 👑

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💖 Debian edition, March 30, 2010 — PMC.UCF(3) signing off! Mwah, bestie! 💖