NAME¶

pfm_get_pmu_name, pfm_get_pmu_type, pfm_get_pmu_name_bytype, pfm_pmu_is_supported, pfm_force_pmu,pfm_list_supported_pmu - query library about supported PMU models

SYNOPSIS¶

#include <perfmon/pfmlib.h>

int pfm_get_pmu_name(char *name, int maxlen);
int pfm_get_pmu_type(int *type);
int pfm_get_pmu_name_bytype(int type, char *name, int maxlen);
int pfm_pmu_is_supported(int type);
int pfm_force_pmu(int type);
int pfm_list_supported_pmus(int (*pf)(const char *fmt,...));

DESCRIPTION¶

These functions retrieve information about the detected host PMU and the PMU models supported by the library. More than one model can be supported by the same library.

Each PMU model is assigned a type and a name. The latter is just a string and the former is a unique identifier. The currently supported types are:

PFMLIB_GENERIC_PMU

Intel Itanium default architected PMU model, i.e., the basic model.

PFMLIB_ITANIUM_PMU

Intel Itanium processor PMU model. The model is found in the first implementation of the IA-64 architecture, code name Merced.

PFMLIB_ITANIUM2_PMU

Intel Itanium 2 processor PMU model. This is the model provided by McKinley, Madison, and Deerfield processors.

PFMLIB_MONTECITO_PMU

Intel Dual-core Itanium 2 processor PMU model. This is the model provided by Montecito, Montvale processors.

PFMLIB_AMD64_PMU

AMD AMD64 processors (family 15 and 16)

PFMLIB_GEN_IA32_PMU

Intel X86 architectural PMU v1, v2, v3

PFMLIB_I386_P6_PMU

Intel P6 processors. That includes Pentium Pro, Pentium II, Pentium III, but excludes Pentium M

PFMLIB_I386_PM_PMU

Intel Pentium M processors.

PFMLIB_INTEL_PII_PMU

Intel Pentium II processors.

PFMLIB_PENTIUM4_PMU

Intel processors based on Netburst micro-architecture. That includes Pentium 4.

PFMLIB_COREDUO_PMU

Intel processors based on Yonah micro-architecture. That includes Intel Core Duo/Core Solo processors

PFMLIB_I386_PM_PMU

Intel Pentium M processors

PFMLIB_INTEL_CORE_PMU

Intel processors based on the Core micro-architecture. That includes Intel Core 2 Duo/Quad processors

PFMLIB_INTEL_ATOM_PMU

Intel processors based on the Atom micro-architecture.

PFMLIB_INTEL_NHM_PMU

Intel processors based on the Nehalem micro-architectures. That includes Intel Core i7 processors.

PFMLIB_MIPS_20KC_PMU

MIPS 20KC processors

PFMLIB_MIPS_24K_PMU

MIPS 24K processors

PFMLIB_MIPS_25KF_PMU

MIPS 25KF processors

PFMLIB_MIPS_34K_PMU

MIPS 34K processors

PFMLIB_MIPS_5KC_PMU

MIPS 5KC processors

PFMLIB_MIPS_74K_PMU

MIPS 74K processors

PFMLIB_MIPS_R10000_PMU

MIPS R10000 processors

PFMLIB_MIPS_R12000_PMU

MIPS R12000 processors

PFMLIB_MIPS_RM7000_PMU

MIPS RM7000 processors

PFMLIB_MIPS_RM9000_PMU

MIPS RM9000 processors

PFMLIB_MIPS_SB1_PMU

MIPS SB1/SB1A processors

PFMLIB_MIPS_VR5432_PMU

MIPS VR5432 processors

PFMLIB_MIPS_VR5500_PMU

MIPS VR5500 processors

PFMLIB_MIPS_ICE9A_PMU

SiCortex ICE9A

PFMLIB_MIPS_ICE9B_PMU

SiCortex ICE9B

PFMLIB_POWERPC_PMU

IBM POWERPC processors

PFMLIB_CRAYX2_PMU

Cray X2 processors

PFMLIB_CELL_PMU

IBM Cell processors

PFMLIB_PPC970_PMU

IBM PowerPC 970(FX,GX) processors

PFMLIB_PPC970MP_PMU

IBM PowerPC 970MP processors

PFMLIB_POWER3_PMU

IBM POWER3 processors

PFMLIB_POWER4_PMU

IBM POWER4 processors

PFMLIB_POWER5_PMU

IBM POWER5 processors

PFMLIB_POWER5p_PMU

BM POWER5+ processors

PFMLIB_POWER6_PMU

IBM POWER6 processors

The pfm_get_pmu_name() function returns the name of the detected host PMU. The library must have been initialized properly before making this call. The name is returned in the name argument. The maxlen argument indicates the maximum length of the buffer provided for name. Up to maxlen-1 characters will be returned, not including the termination character.

The pfm_get_pmu_type() function returns the type of the detected host PMU. The library must have been initialized properly before making this call. The type returned in type can be any one of the three listed above.

The pfm_get_pmu_name_bytype() function returns the name of a PMU model in name given a type in the type argument. The maxlen argument indicates the maximum length of the buffer provided for name. Up to maxlen-1 characters will be returned, not including the termination character.

The pfm_pmu_is_supported() function returns PFMLIB_SUCCESS if the given PMU type is supported by the library independently of what the host PMU model is.

The pfm_force_pmu() function is used to forced the library to use a particular PMU model compared to what it has detected. The library checks that the selected type can be supported by the host PMU. This is mostly useful to force the library to the use generic PMU model PFMLIB_GENERIC_PMU. This function can be called at any time and upon return the library is considered initialized.

The pfm_list_supported_pmu() function is used to print the list PMU types that the library supports. The results is printed using the function provided in the pf argument, which must be a printf-style function.

RETURN¶

The function returns whether or not it was successful. A return value of PFMLIB_SUCCESS indicates success, otherwise the value is the error code.

ERRORS¶

PFMLIB_ERR_NOINIT the library has not been initialized properly.

PFMLIB_ERR_INVAL

invalid argument was given, most likely invalid pointer or invalid PMU type.

PFMLIB_ERR_NOTSUPP

the selected PMU type can be used on the host CPU.

AUTHOR¶

Stephane Eranian <eranian@hpl.hp.com>