Atom

Architecture specific notes for AMD K8

Performance groups

Intel Atom Performance groups

Events

The input file for the events on Intel Atom can be found here.

Counters

The Intel® Atom performance monitoring counters are equal to the ones of the Intel® Core 2 microarchitecture but the event set is different.

Fixed-purpose counters

The Intel® Atom microarchitecture provides 3 fixed-purpose counters. They are core-local, hence each hardware thread has its own set of general-purpose counters.

Counters

Counter name	Event name
FIXC0	INSTR_RETIRED_ANY
FIXC1	CPU_CLK_UNHALTED_CORE
FIXC2	CPU_CLK_UNHALTED_REF

#### Available Options

Option	Argument	Description	Comment
kernel	N	Set bit (index*4) in config register

General-purpose counters

The Intel® Atom microarchitecture provides 2 general-purpose counters consiting of a config and a counter register. They are core-local, hence each hardware thread has its own set of general-purpose counters.

Counters

Counter name	Event name
PMC0	*
PMC1	*

Available Options

Option	Argument	Description	Comment
edgedetect	N	Set bit 18 in config register
kernel	N	Set bit 17 in config register
threshold	8 bit hex value	Set bits 24-31 in config register
invert	N	Set bit 23 in config register