rte_power_pmd_mgmt.h File Reference

#include <stdint.h>
#include <rte_log.h>
#include <rte_power_cpufreq.h>

Go to the source code of this file.

Enumerations
enum	rte_power_pmd_mgmt_type { RTE_POWER_MGMT_TYPE_MONITOR = 1 , RTE_POWER_MGMT_TYPE_PAUSE , RTE_POWER_MGMT_TYPE_SCALE }

Functions
int	rte_power_ethdev_pmgmt_queue_enable (unsigned int lcore_id, uint16_t port_id, uint16_t queue_id, enum rte_power_pmd_mgmt_type mode)
int	rte_power_ethdev_pmgmt_queue_disable (unsigned int lcore_id, uint16_t port_id, uint16_t queue_id)
void	rte_power_pmd_mgmt_set_emptypoll_max (unsigned int max)
unsigned int	rte_power_pmd_mgmt_get_emptypoll_max (void)
int	rte_power_pmd_mgmt_set_pause_duration (unsigned int duration)
unsigned int	rte_power_pmd_mgmt_get_pause_duration (void)
int	rte_power_pmd_mgmt_set_scaling_freq_min (unsigned int lcore, unsigned int min)
int	rte_power_pmd_mgmt_set_scaling_freq_max (unsigned int lcore, unsigned int max)
int	rte_power_pmd_mgmt_get_scaling_freq_min (unsigned int lcore)
int	rte_power_pmd_mgmt_get_scaling_freq_max (unsigned int lcore)

Detailed Description

RTE PMD Power Management

Definition in file rte_power_pmd_mgmt.h.

Enumeration Type Documentation

rte_power_pmd_mgmt_type

enum rte_power_pmd_mgmt_type

PMD Power Management Type

Enumerator
RTE_POWER_MGMT_TYPE_MONITOR	Use power-optimized monitoring to wait for incoming traffic
RTE_POWER_MGMT_TYPE_PAUSE	Use power-optimized sleep to avoid busy polling
RTE_POWER_MGMT_TYPE_SCALE	Use frequency scaling when traffic is low

Examples

examples/l3fwd-power/main.c.

Definition at line 25 of file rte_power_pmd_mgmt.h.

Function Documentation

rte_power_ethdev_pmgmt_queue_enable()

int rte_power_ethdev_pmgmt_queue_enable	(	unsigned int	lcore_id,
		uint16_t	port_id,
		uint16_t	queue_id,
		enum rte_power_pmd_mgmt_type	mode )

Enable power management on a specified Ethernet device Rx queue and lcore.

Note

This function is not thread-safe.

Warning

This function must be called when all affected Ethernet queues are stopped and no Rx/Tx is in progress!

Parameters

lcore_id	The lcore the Rx queue will be polled from.
port_id	The port identifier of the Ethernet device.
queue_id	The queue identifier of the Ethernet device.
mode	The power management scheme to use for specified Rx queue.

Returns

0 on success <0 on error

Examples

examples/l3fwd-power/main.c.

rte_power_ethdev_pmgmt_queue_disable()

int rte_power_ethdev_pmgmt_queue_disable	(	unsigned int	lcore_id,
		uint16_t	port_id,
		uint16_t	queue_id )

Disable power management on a specified Ethernet device Rx queue and lcore.

Note

This function is not thread-safe.

Warning

This function must be called when all affected Ethernet queues are stopped and no Rx/Tx is in progress!

Parameters

lcore_id	The lcore the Rx queue is polled from.
port_id	The port identifier of the Ethernet device.
queue_id	The queue identifier of the Ethernet device.

Returns

0 on success <0 on error

Examples

examples/l3fwd-power/main.c.

rte_power_pmd_mgmt_set_emptypoll_max()

void rte_power_pmd_mgmt_set_emptypoll_max

(

unsigned int

max

)

Set a emptypoll_max to specified value. Used to specify the number of empty polls to wait before entering sleep state.

Parameters

max	The value to set emptypoll_max to.

Examples

examples/l3fwd-power/main.c.

rte_power_pmd_mgmt_get_emptypoll_max()

unsigned int rte_power_pmd_mgmt_get_emptypoll_max

(

void

)

Get the current value of emptypoll_max.

Returns

The current emptypoll_max value

rte_power_pmd_mgmt_set_pause_duration()

int rte_power_pmd_mgmt_set_pause_duration

(

unsigned int

duration

)

Set the pause_duration. Used to adjust the pause mode callback duration.

Note

Duration must be greater than zero.

Parameters

duration

The value to set pause_duration to.

Returns

0 on success <0 on error

Examples

examples/l3fwd-power/main.c.

rte_power_pmd_mgmt_get_pause_duration()

unsigned int rte_power_pmd_mgmt_get_pause_duration

(

void

)

Get the current value of pause_duration.

Returns

The current pause_duration value.

rte_power_pmd_mgmt_set_scaling_freq_min()

int rte_power_pmd_mgmt_set_scaling_freq_min	(	unsigned int	lcore,
		unsigned int	min )

Set the min frequency to be used for frequency scaling or zero to use defaults.

Note

Supported by: Pstate mode.

Parameters

lcore	The ID of the lcore to set the min frequency for.
min	The value, in KiloHertz, to set the minimum frequency to.

Returns

0 on success <0 on error

Examples

examples/l3fwd-power/main.c.

rte_power_pmd_mgmt_set_scaling_freq_max()

int rte_power_pmd_mgmt_set_scaling_freq_max	(	unsigned int	lcore,
		unsigned int	max )

Set the max frequency to be used for frequency scaling or zero to use defaults.

Note

Supported by: Pstate mode.

Parameters

lcore	The ID of the lcore to set the max frequency for.
max	The value, in KiloHertz, to set the maximum frequency to. If 'max' is 0, it is considered 'not set'.

Returns

0 on success <0 on error

Examples

examples/l3fwd-power/main.c.

rte_power_pmd_mgmt_get_scaling_freq_min()

int rte_power_pmd_mgmt_get_scaling_freq_min

(

unsigned int

lcore

)

Get the current configured min frequency used for frequency scaling.

Note

Supported by: Pstate mode.

Parameters

lcore

The ID of the lcore to get the min frequency for.

Returns

0 if no value has been configured via the 'set' API. >0 if a minimum frequency has been configured. Value is the minimum frequency , in KiloHertz, used for frequency scaling. <0 on error

rte_power_pmd_mgmt_get_scaling_freq_max()

int rte_power_pmd_mgmt_get_scaling_freq_max

(

unsigned int

lcore

)

Get the current configured max frequency used for frequency scaling.

Note

Supported by: Pstate mode.

Parameters

lcore

The ID of the lcore to get the max frequency for.

Returns

0 if no value has been configured via the 'set' API. >0 if a maximum frequency has been configured. Value is the maximum frequency , in KiloHertz, used for frequency scaling. <0 on error