|[March 21, 2013]
Toshiba Develops Low Power Operating System for Many-Core LSI for Embedded Applications
TOKYO --(Business Wire)--
Corporation (TOKYO:6502) today announced that it has developed an
innovative, low power operating system (OS) for many-core processors,
targeting application in embedded systems, including automotive products
and digital consumer products. An evaluation of the OS on the company's
own many-core processor recorded a 24.6% power reduction against the
standard OS when running a super resolution program that scaled
1920x1080 pixel images to 3840x2160 resolutions. Details of the new OS
were presented at "Design,
Automation & Test in Europe (DATE 2013)" in Grenoble,
France on March 20.
Recent multimedia processing, including video encoding and decoding and
image recognition, requires high performance processors. Many-core
processors, with up to dozens of cores, are finding an mportant role in
running these applications. However, there is a problem: the higher the
number of cores, the higher total power consumption. Manufactures want
low power systems in order to maximize the battery life of mobile
devices, and in consideration of the environment.
In current methodology, the OS controls power to the processor based on
computation load history. However, this approach is not accurate enough
to reduce power consumption and fails to manage abrupt fluctuations in
computation load, and so more power than necessary is consumed.
Toshiba's (News - Alert) many-core processor OS achieves low power consumption by using
information inherent to parallel programs to control power supply.
Parallel programs are run by a thread unit, and to run correctly the
order for executing the threads must be specified. Toshiba has developed
and employed a technique for specifying the "number of dependence" among
threads and controlling the execution order. This approach recognizes
that the dependency number at any given time closely foreshadows the
computation load in the near future, securing a more accurate prediction
of power requirements. The new OS controls power supply and achieves a
low power system without degradation in performance.
Toshiba plans to apply the low power OS to embedded systems for such
applications as high resolution image processing and image recognition.
Toshiba is a world-leading diversified manufacturer, solutions provider
and marketer of advanced electronic and electrical products and systems.
Toshiba Group brings innovation and imagination to a wide range of
businesses: digital products, including LCD TVs, notebook PCs, retail
solutions and MFPs; electronic devices, including semiconductors,
storage products and materials; industrial and social infrastructure
systems, including power generation systems, smart community solutions,
medical systems and escalators & elevators; and home appliances.
Toshiba was founded in 1875, and today operates a global network of more
than 550 consolidated companies, with 202,000 employees worldwide and
annual sales surpassing 6.1 trillion yen (US$74 billion).
Toshiba's web site at www.toshiba.co.jp/index.htm
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