param

package

v0.0.0-...-5732428 Latest Latest Go to latest Published: Dec 15, 2017 License: GPL-3.0 Imports: 8 Imported by: 1

Details

Valid go.mod file

The Go module system was introduced in Go 1.11 and is the official dependency management solution for Go.
Redistributable license

Redistributable licenses place minimal restrictions on how software can be used, modified, and redistributed.
Tagged version

Modules with tagged versions give importers more predictable builds.
Stable version

When a project reaches major version v1 it is considered stable.
Learn more about best practices

Repository

github.com/HouzuoGuo/saptune

Links

Open Source Insights

Documentation ¶

Overview ¶

Parameters are tunable switches on the system that are tuned in very specific ways.

Each tunable parameter is able to inspect the system to determine the current value, calculate a new value according to system environment and/or user input, and be able to apply the new value upon request.

There's only one way to tune a parameter, however a parameter can be referred to by one or more SAP notes.

Index ¶

func IsValidScheduler(blockdev, scheduler string) bool
func IsValidforNrRequests(blockdev, nrreq string) bool
func MaxI(values ...int) int
func MaxI64(values ...int64) int64
func MaxU64(values ...uint64) uint64
func MinU64(values ...uint64) uint64
type BlockDeviceNrRequests
type BlockDeviceSchedulers
type Parameter

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func IsValidScheduler ¶

func IsValidScheduler(blockdev, scheduler string) bool

func IsValidforNrRequests ¶

func IsValidforNrRequests(blockdev, nrreq string) bool

func MaxI ¶

func MaxI(values ...int) int

Return the maximum among the input values. If there isn't any input value, return 0.

func MaxI64 ¶

func MaxI64(values ...int64) int64

Return the maximum among the input values. If there isn't any input value, return 0.

func MaxU64 ¶

func MaxU64(values ...uint64) uint64

Return the maximum among the input values. If there isn't any input value, return 0.

func MinU64 ¶

func MinU64(values ...uint64) uint64

Return the minimum among the input values. If there isn't any input value, return 0.

Types ¶

type BlockDeviceNrRequests ¶

type BlockDeviceNrRequests struct {
	NrRequests map[string]int
}

Change IO nr_requests on all block devices

func (BlockDeviceNrRequests) Apply ¶

func (ior BlockDeviceNrRequests) Apply() error

func (BlockDeviceNrRequests) Inspect ¶

func (ior BlockDeviceNrRequests) Inspect() (Parameter, error)

func (BlockDeviceNrRequests) Optimise ¶

func (ior BlockDeviceNrRequests) Optimise(newNrRequestValue interface{}) (Parameter, error)

type BlockDeviceSchedulers ¶

type BlockDeviceSchedulers struct {
	SchedulerChoice map[string]string
}

Change IO elevators on all IO devices

func (BlockDeviceSchedulers) Apply ¶

func (ioe BlockDeviceSchedulers) Apply() error

func (BlockDeviceSchedulers) Inspect ¶

func (ioe BlockDeviceSchedulers) Inspect() (Parameter, error)

func (BlockDeviceSchedulers) Optimise ¶

func (ioe BlockDeviceSchedulers) Optimise(newElevatorName interface{}) (Parameter, error)

type Parameter ¶

type Parameter interface {
	Inspect() (Parameter, error)                             // Read the parameter values from current system.
	Optimise(additionalInput interface{}) (Parameter, error) // Calculate new values based on internal states, and return a copy of new states.
	Apply() error                                            // Apply the parameter value without further calculation.
}

A tunable parameter, usually calculated based on user input and/or automatically. Parameter is immutable. Internal state changes can only be made to copies.

Source Files ¶

View all Source files

?	: This menu
/	: Search site
f or F	: Jump to
y or Y	: Canonical URL