rte_power.h File Reference

#include <rte_common.h>
#include <rte_byteorder.h>
#include <rte_log.h>
#include <rte_string_fns.h>
#include <rte_power_guest_channel.h>

Go to the source code of this file.

Data Structures
struct	rte_power_core_capabilities

Typedefs
typedef uint32_t(*	rte_power_freqs_t) (unsigned int lcore_id, uint32_t *freqs, uint32_t num)
typedef uint32_t(*	rte_power_get_freq_t) (unsigned int lcore_id)
typedef int(*	rte_power_set_freq_t) (unsigned int lcore_id, uint32_t index)
typedef int(*	rte_power_freq_change_t) (unsigned int lcore_id)
typedef int(*	rte_power_get_capabilities_t) (unsigned int lcore_id, struct rte_power_core_capabilities *caps)

Functions
__rte_experimental int	rte_power_check_env_supported (enum power_management_env env)
int	rte_power_set_env (enum power_management_env env)
void	rte_power_unset_env (void)
enum power_management_env	rte_power_get_env (void)
int	rte_power_init (unsigned int lcore_id)
int	rte_power_exit (unsigned int lcore_id)

Variables
rte_power_freq_change_t	rte_power_freq_up
rte_power_freq_change_t	rte_power_freq_down
rte_power_freq_change_t	rte_power_freq_max
rte_power_freq_change_t	rte_power_freq_min
rte_power_freq_change_t	rte_power_turbo_status
rte_power_freq_change_t	rte_power_freq_enable_turbo
rte_power_freq_change_t	rte_power_freq_disable_turbo

Detailed Description

RTE Power Management

Definition in file rte_power.h.

Typedef Documentation

rte_power_freqs_t

typedef uint32_t(* rte_power_freqs_t) (unsigned int lcore_id, uint32_t *freqs, uint32_t num)

Get the available frequencies of a specific lcore. Function pointer definition. Review each environments specific documentation for usage.

Parameters

lcore_id	lcore id.
freqs	The buffer array to save the frequencies.
num	The number of frequencies to get.

Returns

The number of available frequencies.

Definition at line 116 of file rte_power.h.

rte_power_get_freq_t

typedef uint32_t(* rte_power_get_freq_t) (unsigned int lcore_id)

Return the current index of available frequencies of a specific lcore. Function pointer definition. Review each environments specific documentation for usage.

Parameters

lcore_id

lcore id.

Returns

The current index of available frequencies.

Definition at line 132 of file rte_power.h.

rte_power_set_freq_t

typedef int(* rte_power_set_freq_t) (unsigned int lcore_id, uint32_t index)

Set the new frequency for a specific lcore by indicating the index of available frequencies. Function pointer definition. Review each environments specific documentation for usage.

Parameters

lcore_id	lcore id.
index	The index of available frequencies.

Returns

• 1 on success with frequency changed.
• 0 on success without frequency changed.
• Negative on error.

Definition at line 152 of file rte_power.h.

rte_power_freq_change_t

typedef int(* rte_power_freq_change_t) (unsigned int lcore_id)

Function pointer definition for generic frequency change functions. Review each environments specific documentation for usage.

Parameters

lcore_id

lcore id.

Returns

• 1 on success with frequency changed.
• 0 on success without frequency changed.
• Negative on error.

Definition at line 168 of file rte_power.h.

rte_power_get_capabilities_t

typedef int(* rte_power_get_capabilities_t) (unsigned int lcore_id, struct rte_power_core_capabilities *caps)

Returns power capabilities for a specific lcore. Function pointer definition. Review each environments specific documentation for usage.

Parameters

lcore_id	lcore id.
caps	pointer to rte_power_core_capabilities object.

Returns

• 0 on success.
• Negative on error.

Definition at line 245 of file rte_power.h.

Function Documentation

rte_power_check_env_supported()

__rte_experimental int rte_power_check_env_supported

(

enum power_management_env

env

)

Warning

EXPERIMENTAL: this API may change, or be removed, without prior notice

Check if a specific power management environment type is supported on a currently running system.

Parameters

env	The environment type to check support for.

Returns

• 1 if supported
• 0 if unsupported
• -1 if error, with rte_errno indicating reason for error.

Examples:

examples/l3fwd-power/main.c.

rte_power_set_env()

int rte_power_set_env

(

enum power_management_env

env

)

Set the default power management implementation. If this is not called prior to rte_power_init(), then auto-detect of the environment will take place. It is thread safe. New env can be set only in uninitialized state (thus rte_power_unset_env must be called if different env was already set).

Parameters

env	env. The environment in which to initialise Power Management for.

Returns

• 0 on success.
• Negative on error.

Examples:

examples/vm_power_manager/guest_cli/main.c, and examples/vm_power_manager/power_manager.c.

rte_power_unset_env()

void rte_power_unset_env

(

void

)

Unset the global environment configuration. This can only be called after all threads have completed.

rte_power_get_env()

enum power_management_env rte_power_get_env

(

void

)

Get the default power management implementation.

Returns

power_management_env The configured environment.

Examples:

examples/l3fwd-power/main.c, and examples/l3fwd-power/perf_core.c.

rte_power_init()

int rte_power_init

(

unsigned int

lcore_id

)

Initialize power management for a specific lcore. If rte_power_set_env() has not been called then an auto-detect of the environment will start and initialise the corresponding resources.

Parameters

lcore_id

lcore id.

Returns

• 0 on success.
• Negative on error.

Examples:

examples/distributor/main.c, examples/l3fwd-power/main.c, examples/vm_power_manager/guest_cli/main.c, and examples/vm_power_manager/power_manager.c.

rte_power_exit()

int rte_power_exit

(

unsigned int

lcore_id

)

Exit power management on a specific lcore. This will call the environment dependent exit function.

Parameters

lcore_id

lcore id.

Returns

• 0 on success.
• Negative on error.

Examples:

examples/distributor/main.c, examples/l3fwd-power/main.c, examples/vm_power_manager/guest_cli/main.c, examples/vm_power_manager/guest_cli/vm_power_cli_guest.c, and examples/vm_power_manager/power_manager.c.

Variable Documentation

rte_power_freq_up

rte_power_freq_change_t rte_power_freq_up

Scale up the frequency of a specific lcore according to the available frequencies. Review each environments specific documentation for usage.

Examples:

examples/l3fwd-power/main.c, and examples/vm_power_manager/guest_cli/vm_power_cli_guest.c.

rte_power_freq_down

rte_power_freq_change_t rte_power_freq_down

Scale down the frequency of a specific lcore according to the available frequencies. Review each environments specific documentation for usage.

Examples:

examples/l3fwd-power/main.c, and examples/vm_power_manager/guest_cli/vm_power_cli_guest.c.

rte_power_freq_max

rte_power_freq_change_t rte_power_freq_max

Scale up the frequency of a specific lcore to the highest according to the available frequencies. Review each environments specific documentation for usage.

Examples:

examples/l3fwd-power/main.c, and examples/vm_power_manager/guest_cli/vm_power_cli_guest.c.

rte_power_freq_min

rte_power_freq_change_t rte_power_freq_min

Scale down the frequency of a specific lcore to the lowest according to the available frequencies. Review each environments specific documentation for usage..

Examples:

examples/vm_power_manager/guest_cli/vm_power_cli_guest.c.

rte_power_turbo_status

rte_power_freq_change_t rte_power_turbo_status

Query the Turbo Boost status of a specific lcore. Review each environments specific documentation for usage..

rte_power_freq_enable_turbo

rte_power_freq_change_t rte_power_freq_enable_turbo

Enable Turbo Boost for this lcore. Review each environments specific documentation for usage..

Examples:

examples/vm_power_manager/guest_cli/vm_power_cli_guest.c.

rte_power_freq_disable_turbo

rte_power_freq_change_t rte_power_freq_disable_turbo

Disable Turbo Boost for this lcore. Review each environments specific documentation for usage..

Examples:

examples/vm_power_manager/guest_cli/vm_power_cli_guest.c.