Documentation
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NAME
libpfm_intel_core - support for Intel Core-based processors
SYNOPSIS
#include <perfmon/pfmlib.h>
PMU name: core
PMU desc: Intel Core
DESCRIPTION
The library supports all Intel Core-based processors that includes models 15, 23, 29.
MODIFIERS
The following modifiers are supported on Intel Core processors:
- u
-
Measure at user level which includes privilege levels 1, 2, 3. This corresponds to PFM_PLM3.
This is a boolean modifier.
- k
-
Measure at kernel level which includes privilege level 0. This corresponds to PFM_PLM0.
This is a boolean modifier.
- i
-
Invert the meaning of the event. The counter will now count cycles in which the event is not
occurring. This is a boolean modifier
- e
-
Enable edge detection, i.e., count only when there is a state transition. This is a boolean modifier.
- c
-
Set the counter mask value. The mask acts as a threshold. The counter will count the number of cycles
in which the number of occurrences of the event is greater or equal to the threshold. This is an integer
modifier with values in the range [0:255].
- p
-
Enable precise sampling for this event. On Intel Core, this triggers the use of the Precise Event
Based Sampling (PEBS) mode. Not all events or unit masks support this mode. This is an integer
modifier with values in the range [0-3]. The value of this modifier determines how the skid of the
interrupted instruction address is handled by the kernel. The exact meaning of each of the four
values depends on the underlying kernel interface. For perf_events, this determines how
PERF_SAMPLE_IP is adjusted by the kernel. Refer to perf_events documentation for more details.
AUTHORS
Stephane Eranian <eranian@gmail.com>
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- MODIFIERS
-
- AUTHORS
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This document was created by
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using the manual pages.
Time: 11:46:10 GMT, March 02, 2011
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