---
name: "libpfm_arm_a64fx"
section: "3"
platform: "linux"
package: "libpfm4-dev"
version: "4.13.0+git99-gc5587f9-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/libpfm_arm_a64fx"
---

# libpfm\_arm\_a64fx(3)

support for Fujitsu A64FX PMU

## NAME

libpfm\_arm\_a64fx - support for Fujitsu A64FX PMU

## SYNOPSIS

```
#include <perfmon/pfmlib.h>

PMU name: arm_a64fx
PMU desc: Fujitsu A64FX

```

## DESCRIPTION

The library supports the Fujitsu A64FX core PMU.

This PMU supports 8 counters and privilege levels filtering. It can operate in 64 bit mode only.

## MODIFIERS

The following modifiers are supported on Fujitsu A64FX:

- **u**

  Measure at the user level. This corresponds to **PFM\_PLM3**. This is a boolean modifier.

- **k**

  Measure at the kernel level. This corresponds to **PFM\_PLM0**. This is a boolean modifier.

- **hv**

  Measure at the hypervisor level. This corresponds to **PFM\_PLMH**. This is a boolean modifier.

## AUTHORS

```
Stephane Eranian <eranian@gmail.com>
```