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  4. rte_power_pmd_mgmt.h(3)

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rte_power_pmd_mgmt.h(3) DPDK rte_power_pmd_mgmt.h(3)

NAME

rte_power_pmd_mgmt.h

SYNOPSIS

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

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

enum rte_power_pmd_mgmt_type

PMD Power Management Type

Enumerator

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

Definition at line 25 of file rte_power_pmd_mgmt.h.

Function Documentation

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

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

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.

unsigned int rte_power_pmd_mgmt_get_emptypoll_max (void)

Get the current value of emptypoll_max.

Returns:

The current emptypoll_max value

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

unsigned int rte_power_pmd_mgmt_get_pause_duration (void)

Get the current value of pause_duration.

Returns:

The current pause_duration value.

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

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

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

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

Author

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