detail of Hyper-threading http://en.wikipedia.org/wi
Yes, when you run Mult-Thread on java, it will run on both two core and or even quad core if you have.
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MultiThreading in Java and HyperThreading.
When i write a multithreading program in Java and there are two cores in the system, then does the program use two cores to run multiple threads?
What is the difference between MultiThreading and HyperThreading on a machine?
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by: ComputerTechiePosted on 2009-08-08 at 08:04:50ID: 25050399
Found this at :http://wiki.answers.com/Q
Super-threading is a multithreading approach that weaves together the execution of different threads on a single processor without truly executing them at the same time.[1] This qualifies it as time-sliced or temporal multithreading rather than simultaneous multithreading. It is motivated by the observation that the processor is occasionally left idle while executing an instruction from one thread. Super-threading seeks to make use of unused processor cycles by applying them to the execution of an instruction from another thread.
Multithreading computers have hardware support to efficiently execute multiple threads. These are distinguished from multiprocessing systems (such as multi-core systems) in that the threads have to share the resources of single core: the computing units, the CPU caches and the translation lookaside buffer (TLB). Where multiprocessing systems include multiple complete processing units, multithreading aims to increase utilization of a single core by leveraging thread-level as well as instruction-level parallelism. As the two techniques are complementary, they are sometimes combined in systems with multiple multithreading CPUs and in CPUs with multiple multithreading cores.
Hyper-threading is Intel's trademarked term for its simultaneous multithreading implementation in their Pentium 4, Atom, and Core i7 CPUs. Hyper-threading (officially termed Hyper-Threading Technology or HTT) is an Intel-proprietary technology used to improve parallelization of computations (doing multiple tasks at once) performed on PC microprocessors. A processor with hyper-threading enabled is treated by the operating system as two processors instead of one. This means that only one processor is physically present but the operating system sees two virtual processors, and shares the workload between them. Hyper-threading requires both operating system and CPU support; conventional multiprocessor support is not enough.[1] For example, Intel does not recommend that hyper-threading be enabled under Windows 2000, even though the operating system supports multiple CPUs.
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