geopm Namespace Reference

Classes
class	Agg
class	BatchClient
	Interface that will attach to a batch server. The batch server that it connects to is typically created through a call to the GEOPM DBus interface io.github.geopm.PlatformStartBatch. More...
class	BatchClientImp
class	BatchServer
class	BatchServerImp
class	BatchStatus
class	BatchStatusClient
class	BatchStatusImp
class	BatchStatusServer
class	CircularBuffer
	Templated container for a circular buffer implementation. The CircularBuffer container implements a fixed size buffer. Once at capacity, any new insertions cause the oldest entry to be dropped. More...
class	CNLIOGroup
	IOGroup that wraps interfaces to Compute Node Linux. More...
class	CombinedControl
	Used by PlatformIO to define a control as a function of other controls. More...
class	CombinedSignal
	Used by PlatformIO to define a signal as a function of other signals. More...
class	ConstConfigIOGroup
class	Control
struct	control_info_s
	Information pertaining to a particular control supported by PlatformIO. More...
class	CpufreqSysfsDriver
	Class used to implement the CpufreqSysfsDriverGroup. More...
class	Cpuid
class	CpuidNull
class	CpuinfoIOGroup
	IOGroup that provides constants for CPU frequency limits as signals for PlatformIO. More...
class	DCGMDevicePool
class	DCGMDevicePoolImp
class	DCGMIOGroup
	IOGroup that provides signals and controls for DCGM GPUs. More...
class	DeprecationWarning
class	DerivativeSignal
class	DifferenceSignal
class	DLRegistry
class	DomainControl
class	DrmGpuTopo
class	DrmSysfsDriver
	Class used to implement the DrmSysfsDriverGroup. More...
class	ErrorMessage
class	Exception
	Class for all GEOPM-specific exceptions. More...
class	GPUTopo
class	GPUTopoNull
class	GRPCServiceProxy
class	IOGroup
class	IOGroupFactory
class	IOUring
class	IOUringFallback
	Fallback implementation of the IOUring batch interface. This implementation uses queues of individual read/write operations instead of a single batched operation. More...
class	IOUringImp
	Implementation of the IOUring batch interface. This implementation batches operations inside io_uring submission queues. More...
struct	json_checker
	Used to validate types and values of JSON objects. More...
class	LevelZero
class	LevelZeroDevicePool
class	LevelZeroDevicePoolImp
class	LevelZeroGPUTopo
class	LevelZeroImp
class	LevelZeroIOGroup
	IOGroup that provides signals and controls for GPUs. More...
class	LevelZeroSignal
class	MSR
	This class encodes how to access fields within an MSR, but does not hold the state of any registers. More...
class	MSRFieldControl
class	MSRFieldSignal
class	MSRIO
class	MSRIOGroup
	IOGroup that provides signals and controls based on MSRs. More...
class	MSRIOImp
class	MSRPath
class	MultiplicationSignal
	A composite signal used by an IOGroup to produce a signal as the Multiplication of one signal and a double. More...
class	NVMLDevicePool
class	NVMLDevicePoolImp
class	NVMLGPUTopo
class	NVMLIOGroup
	IOGroup that provides signals and controls for NVML GPUs. More...
class	PlatformIO
	Class which is a collection of all valid control and signal objects for a platform. More...
class	PlatformIOImp
class	PlatformTopo
class	PlatformTopoImp
class	PluginFactory
class	POSIXSignal
class	POSIXSignalImp
class	PowercapSysfsDriver
class	RatioSignal
	A composite signal used by an IOGroup to produce a signal as the Ratio of two signals. More...
class	RawMSRSignal
class	RolloverGenerator
class	RuntimeStats
	Class that aggregates statistics without buffered data. More...
class	SaveControl
	Class that enables the save/restore feature for IOGroups. More...
class	SaveControlImp
class	SDBus
	Abstraction around sd_bus interface for calling methods. More...
class	SDBusImp
class	SDBusMessage
	Abstraction around sd_bus interfaces that read from or append to sd_bus_message types. More...
class	SDBusMessageImp
class	SecurePath
	Helper object to optionally verify that a file was created with a. More...
class	ServiceIOGroup
	IOGroup that uses DBus interface to access geopmd provided signals and controls. This IOGroup is not loaded by a server side PlatformIO object. More...
class	ServiceProxy
	Proxy object for the io.github.geopm D-Bus interface used to implement the ServiceIOGroup. More...
class	ServiceProxyImp
class	SharedMemory
	This class encapsulates an inter-process shared memory region. More...
class	SharedMemoryImp
class	SharedMemoryScopedLock
	An object used to automatically hold a SharedMemory mutex while in scope, and release it when out of scope. More...
class	Signal
struct	signal_info_s
	Information pertaining to a particular signal supported by PlatformIO. More...
struct	sst_cpu_map_interface_batch_s
struct	sst_cpu_map_interface_s
	A single mapping of logical CPU index to punit CPU. More...
struct	sst_mbox_interface_batch_s
struct	sst_mbox_interface_s
	A single mailbox operation. More...
struct	sst_mmio_interface_batch_s
struct	sst_mmio_interface_s
	A single MMIO operation. More...
struct	sst_version_s
	SST Version information. More...
class	SSTControl
class	SSTIO
class	SSTIoctl
	Defines functions that interact directly with SST ioctls. More...
class	SSTIoctlImp
class	SSTIOGroup
	IOGroup that provides a signal for the time since GEOPM startup. More...
class	SSTIOImp
class	SSTSignal
class	StatsCollector
	Class that accumulates statistics based on PlatformIO requests. More...
class	StatsCollectorImp
class	SysfsDriver
	Class used to implement the SysfsIOGroup base class. More...
class	SysfsIOGroup
class	TimeIOGroup
	IOGroup that provides a signal for the time since GEOPM startup. More...
class	TimeSignal
class	TimeZero
class	UniqueFd
	A wrapper to close a file descriptor when the descriptor goes out of scope. More...

Enumerations
enum	string_format_e { STRING_FORMAT_DOUBLE , STRING_FORMAT_INTEGER , STRING_FORMAT_HEX , STRING_FORMAT_RAW64 }

Functions
std::vector< double >	nan_filter (const std::vector< double > &operand)
const std::string	cpufreq_sysfs_json (void)
DCGMDevicePool &	dcgm_device_pool ()
const std::string	drm_sysfs_json (void)
std::string	error_message (int error_value)
	Function that converts an error code into an error message.
int	exception_handler (std::exception_ptr eptr, bool do_print=false)
	Handle a thrown exception and return an error value.
uint64_t	hash (const std::string &key)
void	plugin_load (const std::string &plugin_prefix)
void	plugin_reset (void)
std::string	shmem_path_prof (const std::string &shm_key, int pid, int uid)
void	shmem_create_prof (const std::string &shm_key, size_t size, int pid, int uid, int gid)
std::string	version (void)
std::vector< int >	shared_object_version (void)
void	check_hint (uint64_t hint)
const GPUTopo &	gpu_topo (void)
std::string	read_file (const std::string &path)
	Reads the specified file and returns the contents in a string.
double	read_double_from_file (const std::string &path, const std::string &expected_units)
	Read a file and return a double read from the file.
void	write_file (const std::string &path, const std::string &contents)
	Writes a string to a file. This will replace the file if it exists or create it if it does not exist.
std::vector< std::string >	string_split (const std::string &str, const std::string &delim)
	Splits a string according to a delimiter.
std::string	string_join (const std::vector< std::string > &string_list, const std::string &delim)
	Joins a vector of strings together with a delimiter.
std::string	hostname (void)
	Returns the current hostname as a string.
std::vector< std::string >	list_directory_files (const std::string &path)
	List all files in the given directory.
bool	string_begins_with (const std::string &str, const std::string &key)
	Returns whether one string begins with another.
bool	string_ends_with (std::string str, std::string key)
	Returns whether one string ends with another.
std::string	string_format_double (double signal)
	Format a string to best represent a signal encoding a double precision floating point number.
std::string	string_format_float (double signal)
	Format a string to best represent a signal encoding a single precision floating point number.
std::string	string_format_integer (double signal)
	Format a string to best represent a signal encoding a decimal integer.
std::string	string_format_hex (double signal)
	Format a string to best represent a signal encoding an unsigned hexadecimal integer.
std::string	string_format_raw64 (double signal)
	Format a string to represent the raw memory supporting a signal as an unsigned hexadecimal integer.
std::function< std::string(double)>	string_format_type_to_function (int format_type)
	Convert a format type enum string_format_e to a format function.
std::function< std::string(double)>	string_format_name_to_function (const std::string &format_name)
	Convert a format function to a format name to a format function.
int	string_format_function_to_type (std::function< std::string(double)> format_function)
	Convert a format function to a format type enum string_format_e.
std::string	get_env (const std::string &name)
	Read an environment variable.
int	verbosity_level (void)
	Query environment for verbosity level.
unsigned int	pid_to_uid (const int pid)
	Query for the user id associated with the process id.
unsigned int	pid_to_gid (const int pid)
	Query for the group id associated with the process id.
std::unique_ptr< cpu_set_t, std::function< void(cpu_set_t *)> >	make_cpu_set (int num_cpu, const std::set< int > &cpu_enabled)
	Wrapper around CPU_ALLOC and CPU_FREE.
bool	has_cap_sys_admin (void)
	Check if the caller has effective capability CAP_SYS_ADMIN.
bool	has_cap_sys_admin (int pid)
	Check if the pid has effective capability CAP_SYS_ADMIN.
std::string	read_symlink_target (const std::string &symlink_path)
void	enable_fixed_counters (PlatformIO &pio)
bool	is_all_nan (const std::vector< double > &vec)
	Return true if all values in the given vector are NAN.
std::set< int >	get_cpuset (int pid)
	Get the CPUs available to the specified process based on cgroup constraints.
IOGroupFactory &	iogroup_factory (void)
const LevelZero &	levelzero ()
const LevelZeroDevicePool &	levelzero_device_pool ()
const std::string	arch_msr_json (void)
const std::string	knl_msr_json (void)
const std::string	hsx_msr_json (void)
const std::string	snb_msr_json (void)
const std::string	skx_msr_json (void)
const std::string	spr_msr_json (void)
void	check_expected_key_values (const Json &root, const std::map< std::string, json_checker > &required_key_map, const std::map< std::string, json_checker > &optional_key_map, const std::string &loc_message)
NVMLDevicePool &	nvml_device_pool (const int num_cpu)
PlatformIO &	platform_io (void)
const PlatformTopo &	platform_topo (void)
const std::string	powercap_sysfs_json (void)
struct geopm_time_s	time_zero (void)
void	time_zero_reset (const geopm_time_s &zero)
struct geopm_time_s	time_curr (void)
struct geopm_time_s	time_curr_real (void)
std::string	time_curr_string (void)
template<class Type , class ... Args>
std::unique_ptr< Type >	make_unique (Args &&...args)
	Implementation of std::make_unique (C++14) for C++11. Note that this version will only work for non-array types.

Enumeration Type Documentation

string_format_e

enum geopm::string_format_e

Enumerator
STRING_FORMAT_DOUBLE
STRING_FORMAT_INTEGER
STRING_FORMAT_HEX
STRING_FORMAT_RAW64

Function Documentation

arch_msr_json()

const std::string geopm::arch_msr_json

(

void

)

check_expected_key_values()

void geopm::check_expected_key_values	(	const Json &	root,
		const std::map< std::string, json_checker > &	required_key_map,
		const std::map< std::string, json_checker > &	optional_key_map,
		const std::string &	loc_message
	)

check_hint()

void geopm::check_hint

(

uint64_t

hint

)

cpufreq_sysfs_json()

const std::string geopm::cpufreq_sysfs_json

(

void

)

dcgm_device_pool()

DCGMDevicePool & geopm::dcgm_device_pool

(

)

drm_sysfs_json()

const std::string geopm::drm_sysfs_json

(

void

)

enable_fixed_counters()

void GEOPM_PUBLIC geopm::enable_fixed_counters

(

PlatformIO &

pio

)

Enable MSR fixed counters.

Parameters

[in]

pio

Reference to the PlatformIO object used to write the registers.

error_message()

std::string GEOPM_PUBLIC geopm::error_message

(

int

error_value

)

Function that converts an error code into an error message.

Parameters

error_value

The error code associated with the exception.

Returns

string The error message associated with the error code.

exception_handler()

int GEOPM_PUBLIC geopm::exception_handler	(	std::exception_ptr	eptr,
		bool	do_print = false
	)

Handle a thrown exception and return an error value.

This exception handler is used by every GEOPM C interface to handle any exceptions that are thrown during execution of a C++ implementation. If GEOPM has been configured with debugging enabled, then this handler will print an explanatory message to standard error. In all cases it will convert the C++ exception into an error number which can be used with geopm_error_message() to obtain an error message. Note that the error message printed when debugging is enabled has more specific information than the message produced by geopm_error_message().

Parameters

[in]	eptr	A pointer to a thrown exception such as std::current_exception().
[in]	do_print	A bool specifying whether or not to print a debug string to standard error when handling exception.

Returns

Error number, positive numbers are system errors, negative numbers are GEOPM errors.

get_cpuset()

std::set< int > GEOPM_PUBLIC geopm::get_cpuset

(

int

pid

)

Get the CPUs available to the specified process based on cgroup constraints.

Parameters

[in]

pid

Process ID to check, 0 means the current process

Returns

Set of CPU IDs that the process can use

get_env()

std::string GEOPM_PUBLIC geopm::get_env

(

const std::string &

name

)

Read an environment variable.

Parameters

[in]

The

name of the environment variable to read.

Returns

The contents of the variable if present, otherwise an empty string.

gpu_topo()

const GPUTopo & geopm::gpu_topo

(

void

)

has_cap_sys_admin() [1/2]

bool GEOPM_PUBLIC geopm::has_cap_sys_admin

(

int

pid

)

Check if the pid has effective capability CAP_SYS_ADMIN.

Parameters

[in]

pid

Linux PID to check

Returns

True if the PID has CAP_SYS_ADMIN

has_cap_sys_admin() [2/2]

bool GEOPM_PUBLIC geopm::has_cap_sys_admin

(

void

)

Check if the caller has effective capability CAP_SYS_ADMIN.

Returns

True if the PID has CAP_SYS_ADMIN

hash()

uint64_t geopm::hash

(

const std::string &

key

)

hostname()

std::string GEOPM_PUBLIC geopm::hostname

(

void

)

Returns the current hostname as a string.

hsx_msr_json()

const std::string geopm::hsx_msr_json

(

void

)

iogroup_factory()

IOGroupFactory GEOPM_PUBLIC & geopm::iogroup_factory

(

void

)

is_all_nan()

bool GEOPM_PUBLIC geopm::is_all_nan

(

const std::vector< double > &

vec

)

Return true if all values in the given vector are NAN.

Parameters

[in]

vec

Vector to check

Returns

True if all values in the vector are NAN

knl_msr_json()

const std::string geopm::knl_msr_json

(

void

)

levelzero()

const LevelZero & geopm::levelzero

(

)

levelzero_device_pool()

const LevelZeroDevicePool & geopm::levelzero_device_pool

(

)

list_directory_files()

std::vector< std::string > GEOPM_PUBLIC geopm::list_directory_files

(

const std::string &

path

)

List all files in the given directory.

Parameters

[in]

path

Path to the directory.

make_cpu_set()

std::unique_ptr< cpu_set_t, std::function< void(cpu_set_t *)> > GEOPM_PUBLIC geopm::make_cpu_set	(	int	num_cpu,
		const std::set< int > &	cpu_enabled
	)

Wrapper around CPU_ALLOC and CPU_FREE.

Parameters

[in]	num_cpu	The number of CPUs to allocate the CPU set
[in]	cpu_enabled	The CPUs to be included in the CPU set

Returns

A std::unique_ptr to a cpu_set_t configured to use CPU_FREE as the deleter.

make_unique()

template<class Type , class ... Args>

std::unique_ptr< Type > geopm::make_unique

(

Args &&...

args

)

Implementation of std::make_unique (C++14) for C++11. Note that this version will only work for non-array types.

nan_filter()

std::vector< double > geopm::nan_filter

(

const std::vector< double > &

operand

)

nvml_device_pool()

NVMLDevicePool & geopm::nvml_device_pool

(

const int

num_cpu

)

pid_to_gid()

unsigned int GEOPM_PUBLIC geopm::pid_to_gid

(

const int

pid

)

Query for the group id associated with the process id.

Parameters

[in]

pid

The process id to query.

Returns

The group id.

pid_to_uid()

unsigned int GEOPM_PUBLIC geopm::pid_to_uid

(

const int

pid

)

Query for the user id associated with the process id.

Parameters

[in]

pid

The process id to query.

Returns

The user id.

platform_io()

PlatformIO GEOPM_PUBLIC & geopm::platform_io

(

void

)

platform_topo()

const PlatformTopo GEOPM_PUBLIC & geopm::platform_topo

(

void

)

plugin_load()

void GEOPM_PUBLIC geopm::plugin_load

(

const std::string &

plugin_prefix

)

plugin_reset()

void GEOPM_PUBLIC geopm::plugin_reset

(

void

)

powercap_sysfs_json()

const std::string geopm::powercap_sysfs_json

(

void

)

read_double_from_file()

double GEOPM_PUBLIC geopm::read_double_from_file	(	const std::string &	path,
		const std::string &	expected_units
	)

Read a file and return a double read from the file.

If a double cannot be read from the file or the units reported in the file do not match the expected units, an exception is thrown.

Parameters

[in]	path	The path of the file to read.
[in]	expected_units	Expected units to follow the double. Provide an empty string if no units are expected.

Returns

The value read from the file.

read_file()

std::string GEOPM_PUBLIC geopm::read_file

(

const std::string &

path

)

Reads the specified file and returns the contents in a string.

Parameters

[in]

path

The path of the file to read.

Returns

The contents of the file at path.

read_symlink_target()

std::string GEOPM_PUBLIC geopm::read_symlink_target

(

const std::string &

symlink_path

)

Read a symlink, returning the target path contained in the symlink.

Parameters

[in]

symlink_path

Path to the symlink

shared_object_version()

std::vector< int > geopm::shared_object_version

(

void

)

shmem_create_prof()

void geopm::shmem_create_prof	(	const std::string &	shm_key,
		size_t	size,
		int	pid,
		int	uid,
		int	gid
	)

shmem_path_prof()

std::string geopm::shmem_path_prof	(	const std::string &	shm_key,
		int	pid,
		int	uid
	)

skx_msr_json()

const std::string geopm::skx_msr_json

(

void

)

snb_msr_json()

const std::string geopm::snb_msr_json

(

void

)

spr_msr_json()

const std::string geopm::spr_msr_json

(

void

)

string_begins_with()

bool GEOPM_PUBLIC geopm::string_begins_with	(	const std::string &	str,
		const std::string &	key
	)

Returns whether one string begins with another.

string_ends_with()

bool GEOPM_PUBLIC geopm::string_ends_with	(	std::string	str,
		std::string	key
	)

Returns whether one string ends with another.

string_format_double()

std::string GEOPM_PUBLIC geopm::string_format_double

(

double

signal

)

Format a string to best represent a signal encoding a double precision floating point number.

Parameters

[in]

signal

A real number that requires many significant digits to accurately represent.

Returns

A well-formatted string representation of the signal.

string_format_float()

std::string GEOPM_PUBLIC geopm::string_format_float

(

double

signal

)

Format a string to best represent a signal encoding a single precision floating point number.

Parameters

[in]

signal

A real number that requires a few significant digits to accurately represent.

Returns

A well formatted string representation of the signal.

string_format_function_to_type()

int GEOPM_PUBLIC geopm::string_format_function_to_type

(

std::function< std::string(double)>

format_function

)

Convert a format function to a format type enum string_format_e.

string_format_hex()

std::string GEOPM_PUBLIC geopm::string_format_hex

(

double

signal

)

Format a string to best represent a signal encoding an unsigned hexadecimal integer.

Parameters

[in]

signal

An unsigned integer that is best represented as a hexadecimal number and has been assigned to a double precision number

Returns

A well formatted string representation of the signal.

string_format_integer()

std::string GEOPM_PUBLIC geopm::string_format_integer

(

double

signal

)

Format a string to best represent a signal encoding a decimal integer.

Parameters

[in]

signal

An integer that is best represented as a decimal number.

Returns

A well formatted string representation of the signal.

string_format_name_to_function()

std::function< std::string(double)> GEOPM_PUBLIC geopm::string_format_name_to_function

(

const std::string &

format_name

)

Convert a format function to a format name to a format function.

string_format_raw64()

std::string GEOPM_PUBLIC geopm::string_format_raw64

(

double

signal

)

Format a string to represent the raw memory supporting a signal as an unsigned hexadecimal integer.

Parameters

[in]

signal

A 64-bit unsigned integer that has been byte-wise copied into the memory of signal.

Returns

A well formatted string representation of the signal.

string_format_type_to_function()

std::function< std::string(double)> GEOPM_PUBLIC geopm::string_format_type_to_function

(

int

format_type

)

Convert a format type enum string_format_e to a format function.

string_join()

std::string GEOPM_PUBLIC geopm::string_join	(	const std::vector< std::string > &	string_list,
		const std::string &	delim
	)

Joins a vector of strings together with a delimiter.

Parameters

[in]	string_list	The list of strings to be joined.
[in]	delim	The delimiter to use to join the strings.

Returns

The joined string.

string_split()

std::vector< std::string > GEOPM_PUBLIC geopm::string_split	(	const std::string &	str,
		const std::string &	delim
	)

Splits a string according to a delimiter.

Parameters

[in]	str	The string to be split.
[in]	delim	The delimiter to use to divide the string. Cannot be empty.

Returns

A vector of string pieces.

time_curr()

struct geopm_time_s geopm::time_curr

(

void

)

time_curr_real()

struct geopm_time_s geopm::time_curr_real

(

void

)

time_curr_string()

std::string geopm::time_curr_string

(

void

)

time_zero()

struct geopm_time_s geopm::time_zero

(

void

)

time_zero_reset()

void geopm::time_zero_reset

(

const geopm_time_s &

zero

)

verbosity_level()

int GEOPM_PUBLIC geopm::verbosity_level

(

void

)

Query environment for verbosity level.

Read GEOPM_VERBOSITY environment variable. If set, convert to integer. If unset, or conversion fails, returns default value. The default value is 0 unless the GEOPM software is compiled with –enable-debug configuration. When debug is enabled at compile time, the default value is 2.

Level 0: Print errors and critical warning messages Level 1: Print warning messages Level 2: Print diagnostic info messages

Returns

Verbosity level for GEOPM messaging

version()

std::string geopm::version

(

void

)

write_file()

void GEOPM_PUBLIC geopm::write_file	(	const std::string &	path,
		const std::string &	contents
	)

Writes a string to a file. This will replace the file if it exists or create it if it does not exist.

Parameters

[in]	path	The path to the file to write to.
[in]	contents	The string to write to the file.