Package com.digi.android.system.cpu

Class GovernorSchedUtil

java.lang.Object

com.digi.android.system.cpu.Governor

com.digi.android.system.cpu.GovernorSchedUtil

public class GovernorSchedUtil
extends Governor

Represents a governor of type 'schedutil'. This governor uses CPU utilization data available from the CPU scheduler. It generally is regarded as a part of the CPU scheduler, so it can access the scheduler's internal data structures directly.

Field Summary

Fields

Modifier and Type	Field	Description
static long	MAX_RATE_LIMIT	Maximum value of timer rate: microseconds.
static long	MIN_RATE_LIMIT	Minimum value of timer rate: microseconds.

Fields inherited from class com.digi.android.system.cpu.Governor

governorType, manager, PATH_GOVERNOR_SETTINGS

Method Summary

Modifier and Type	Method	Description
long	getDownRateLimit()	Gets the amount of microseconds Schedutil must wait before decreasing the frequency.
protected java.lang.String	getTag()	Returns the class tag used for logging purposes.
long	getUpRateLimit()	Gets the amount of microseconds Schedutil must wait before increasing the frequency.
void	setDownRateLimit(long limit)	Sets the amount of microseconds Schedutil must wait before decreasing the frequency.
void	setUpRateLimit(long limit)	Sets the amount of microseconds Schedutil must wait before increasing the frequency.

Methods inherited from class com.digi.android.system.cpu.Governor

getGovernorType, getSettingPath, readFile, writeFile

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_RATE_LIMIT

public static final long MAX_RATE_LIMIT

Maximum value of timer rate: microseconds.

See Also:

Constant Field Values

MIN_RATE_LIMIT

public static final long MIN_RATE_LIMIT

Minimum value of timer rate: microseconds.

See Also:

Constant Field Values

Method Detail

getTag

protected java.lang.String getTag()

Description copied from class: Governor

Returns the class tag used for logging purposes.

Specified by:

getTag in class Governor

Returns:

The class tag.

getDownRateLimit

public long getDownRateLimit()
                      throws CPUException

Gets the amount of microseconds Schedutil must wait before decreasing the frequency.

Returns:

The down rate limit in microseconds, -1 if the value could not be read.

Throws:

CPUException - If there is an error during the configuration process.

See Also:

MAX_RATE_LIMIT, MIN_RATE_LIMIT, getUpRateLimit(), setDownRateLimit(long), setUpRateLimit(long)

setDownRateLimit

public void setDownRateLimit(long limit)
                      throws CPUException

Sets the amount of microseconds Schedutil must wait before decreasing the frequency. Decreasing this value will allow frequencies to fall faster.

Parameters:

limit - Time in microseconds.

Throws:

CPUException - If there is an error during the configuration process.

java.lang.IllegalArgumentException - If limit < MIN_RATE_LIMIT or if limit > MAX_RATE_LIMIT.

See Also:

MAX_RATE_LIMIT, MIN_RATE_LIMIT, getDownRateLimit(), getUpRateLimit(), setUpRateLimit(long)

getUpRateLimit

public long getUpRateLimit()
                    throws CPUException

Gets the amount of microseconds Schedutil must wait before increasing the frequency.

Returns:

The up rate limit in microseconds, -1 if the value could not be read.

Throws:

CPUException - If there is an error during the configuration process.

See Also:

MAX_RATE_LIMIT, MIN_RATE_LIMIT, getDownRateLimit(), setDownRateLimit(long), setUpRateLimit(long)

setUpRateLimit

public void setUpRateLimit(long limit)
                    throws CPUException

Sets the amount of microseconds Schedutil must wait before increasing the frequency. Increasing this value will slowdown the ramp up of frequencies.

Parameters:

limit - Time in microseconds.

Throws:

CPUException - If there is an error during the configuration process.

java.lang.IllegalArgumentException - If limit < MIN_RATE_LIMIT or if limit > MAX_RATE_LIMIT.

See Also:

MAX_RATE_LIMIT, MIN_RATE_LIMIT, getDownRateLimit(), getUpRateLimit(), setDownRateLimit(long)