Browse Definitions :
Definition

dynamic voltage and frequency scaling (DVFS)

Contributor(s): Matthew Haughn

Dynamic voltage and frequency scaling (DVFS) is the adjustment of power and speed settings on a computing device’s various processors, controller chips and peripheral devices to optimize resource allotment for tasks and maximize power saving when those resources are not needed.

DVFS allows devices to perform needed tasks with the minimum amount of required power.  The technology is used in almost all modern computer hardware to maximize power savings, battery life and longevity of devices while still maintaining ready compute performance availability.

An unused smartphone, for example, should revert to a low-power mode, barring interference from applications and spyware. Multimedia requires more power, so the device reaches a higher power state and creates more heat during heavier processing such as video and gaming. Were it not for DVFS, many devices that are passively cooled would require active cooling. However, the noise, bulk and power consumption required by active cooling makes it impractical for smaller devices. DVFS helps maintain operable parameters with increased mobility.

DVFS is not reserved for mobile technology alone. Desktops, servers and virtual environments also benefit from the power savings of DVFS. In VMware vSphere, DVFS allows host CPUs to dynamically change power states when resource demands are low to reduce a host's energy consumption. CPU frequency and voltages are lowered and raised based on demand from virtual machines (VMs).

While more important in environments with large numbers of computers, like offices, server farms and data centers, individual users are also paying more attention to power consumption. DVFS can also scale upwards to increase performance. Both AMD and Intel feature similar technology, often referred to as “turbo mode” for short runs of speeds beyond what the device could maintain indefinitely, at least with default cooling. 

This was last updated in December 2015

Continue Reading About dynamic voltage and frequency scaling (DVFS)

Join the conversation

1 comment

Send me notifications when other members comment.

Please create a username to comment.

Can we implement DVFS based Scheduling in AWS?
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • cybersecurity insurance (cybersecurity liability insurance)

    Cybersecurity insurance, also called cyber liability insurance or cyber insurance, is a contract that an entity can purchase to ...

  • phishing

    Phishing is a form of fraud in which an attacker masquerades as a reputable entity or person in email or other communication ...

  • cybercrime

    Cybercrime is any criminal activity that involves a computer, networked device or a network.

SearchHealthIT

SearchDisasterRecovery

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

SearchStorage

  • NVMe over Fabrics (NVMe-oF)

    NVMe over Fabrics, also known as NVMe-oF and non-volatile memory express over fabrics, is a protocol specification designed to ...

  • logical unit number (LUN)

    A logical unit number (LUN) is a unique identifier for designating an individual or collection of physical or virtual storage ...

  • CIFS (Common Internet File System)

    CIFS (Common Internet File System) is a protocol that gained popularity around the year 2000, as vendors worked to establish an ...

Close