HYPER-THREADING TECHNOLOGY
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The document discusses hyper-threading (HT) technology, which enables a single processor to appear and function as multiple logical processors by duplicating the architectural state while sharing execution resources. HT allows two threads to run simultaneously, increasing processor efficiency. The main advantages are a 5% increase in die area size while avoiding performance loss with single threads and improving performance with multiple threads. Potential disadvantages include non-deterministic thread overhead and shared resource conflicts.
HYPER-THREADING TECHNOLOGY
- 2. CONTENTS Introduction HT Architecture Working principle Advantages & Disadvantages
- 3. INTRODUCTION “HT Technology”, enables the processor to execute two threads or sets of instructions at the same time. Since hyper-threading allows two streams to be executed in parallel it is almost like having two separate processor working together.
- 4. Hyper-Threading Architecture First used in Intel Xeon MP processor Makes a single physical processor appear as multiple logical processors. Each logical processor has a copy of architecture state. Logical processors share a single set of physical execution resources
- 5. Hyper-Threading technology is a form of simultaneous multi-threading technology (SMT), where multiple threads of software applications can be run simultaneously on one processor. This is achieved by duplicating the architectural state on each processor, while sharing one set of processor execution resources.
- 7. Advantages Extra architecture only adds about 5% to the total die area. No performance loss if only one thread is active. Increased performance with multiple threads Hyper-Threading Technology is designed to increase the ability to use a processor efficiently Increase thread-level parallelism
- 8. Disadvantages To take advantage of hyper-threading performance, serial execution can not be used. Threads are non-deterministic and involve extra design Threads have increased overhead Shared resource conflicts
- 9. Business Benefits of Hyper-Threading Technology Higher transaction rates for e-businesses Improved reaction and response times for end-users and customers. Increased number of users that a server system can support Handle increased server workloads Compatibility with existing server applications and operating systems
- 10. Conclusion Intel’s Hyper-Threading Technology brings the concept of simultaneous multi-threading to the Intel Architecture Hyper-Threading Technology shows performance gains of up to 30% on common server application benchmarks for this technology.
- 12. THANK YOU
Editor's Notes
- #5: Hyper-threading is Intel's proprietary simultaneous multithreading (SMT) implementation used to improve parallelization of computations performed on x86 microprocessors. It first appeared in February 2002 on Xeon server processors and in November 2002 on Pentium 4 desktop CPUs . Later, Intel Included this technology in Itanium, Atom, and Core 'i' Series CPUs, among others.