LongRun and LongRun2 are power management

Power management

Power management is a feature of some electrical appliances, especially copiers, computers and computer peripherals such as monitors and printers, that turns off the power or switches the system to a low-power state when inactive. In computing this is known as PC power management and is built...

 technologies introduced by Transmeta

Transmeta

Transmeta Corporation was a US-based corporation that licensed low power semiconductor intellectual property. Transmeta originally produced very long instruction word code morphing microprocessors, with a focus on reducing power consumption in electronic devices. It was founded in 1995 by Bob...

. LongRun was introduced with the Crusoe

Transmeta Crusoe

The Crusoe is a family of x86-compatible microprocessors developed by Transmeta. Crusoe was notable for its method of achieving x86 compatibility. Instead of the instruction set architecture being implemented in hardware, or translated by specialized hardware, the Crusoe runs a software abstraction...

 processor, while LongRun2 was introduced with the Efficeon

Efficeon

The Efficeon processor is Transmeta's second-generation 256-bit VLIW design which employs a software engine to convert code written for x86 processors to the native instruction set of the chip...

processor. LongRun2 has since been licensed to Fujitsu, NEC, Sony, Toshiba, and NVIDIA.

LongRun was based primarily on aggressively reducing the clock frequency and voltage supplied to the processor, in order to reduce active power consumption. LongRun2 built further on this by incorporating process technology meant to reduce variations in the manufacturing process and thereby improve yields.

External links

• Official description of LongRun2, recovered from the Internet Archive as of 2009.