MIT makes Hornet multicore simulator power aware
March 12, 2012 // Peter Clarke
Researchers at the Massachusetts Institute of Technology have developed a software simulator, called Hornet, that they claim models the cycle-accurate performance of multicore chips and scales up to 1,000 of cores.
The research group reported on the Hornet simulator at the International Symposium on Networks-on-Chip in 2011 and won a best-paper prize, MIT said. The team presents an enhanced version of the simulator in the forthcoming issue of IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems that factors in power consumption as well as patterns of communications between cores, the processing times of individual tasks, and memory-access patterns.
To maintain accuracy of simulation and achieve reasonable run times researchers typically use models of processor cores implemented on programmable chips. To finish in a reasonable time software-only simulations have to sacrifice accuracy and precision.
Hornet sits between the two approaches, according to Myong Hyon Cho, a PhD student in MIT's department of electrical engineering and computer science (EECS) and one of Hornet's developers. It is intended to complement the other two approaches.
Although Hornet is slower than some predecessors it can provide cycle-accurate simulation of chips with 1,000 cores. Cycle accuracy is important to catch race and deadlock conditions. Hornet has already proved itself in the simulation of an architecture in which tasks are handed out to cores holding relevant data – rather than moving data to cores running particular tasks. Hornet found a deadlock condition. The researchers also proposed a way to avoid it — and demonstrated that their proposal worked with another Hornet simulation.
Hardware-based simulators cannot be reprogrammed so easily. Hornet could have advantages in situations where "you want to test out several ideas quickly, with good accuracy," according to Edward Suh, an assistant professor of electrical and computer engineering at Cornell University, whose group used an early version of Hornet.
However, because Hornet is slower than either hardware-accelerated simulation or less-accurate software simulation it does tend to be used to simulate small parts of an application.
Never lose track of things
March 30, 2015
This month, DecaWave is offering EETimes Europe's readers the chance to win two TREK1000 kits to evaluate its Ultra-Wideband ...
Graphene's first commercial success: energy-saving light bulbs?
Nanolaser enables on-chip photonics
New cyber-physical systems as the basis for IoT: Europe has it all
1.5-A LDO plus regulator monitors current and temperature
Sensor data predict failure of large machines
March 29, 2015
Long before they actually fail, large machines exhibit signs of wear and tear. A team of researchers from the Saarland University ...
Big data sets drones to fly
CE marking misconceptions
Fraunhofer launches test centre for high-voltage batteries
- Intelligent Over Temperature Protection for LED Lighting Applications
- Intel helps to Turbocharge Infotainment Systems Designs
- High Performance Portable DC Bench Power Supply: Save Money and Free Up Bench Real Estate by Building Your Own
- Software-Defined Radio Handbook
InterviewInfineon: CAN FD success goes at the expense of FlexRay
The faster version of the venerable CAN bus, CAN FD is currently taking off at several carmakers. Infineon's Thomas Böhm, Head of Body / Automotive, believes this could well go at the expense of FlexRay. ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Freescale is giving away 5 RIoTboards, worth 74 dollars each, for EETimes Europe's readers to win.
Designed to run Android operating systems efficiently or to run under Linux, the board is based on the Freescale i.MX 6Solo processor; using the ARM Cortex-A9 architecture.
The RIoTboard platform also includes a rich set of peripherals including a 10M/100M/Gb Ethernet port, 1...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.