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Hyper threading technology

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SHASHI SHAW
SHASHI SHAW

Hyper-threading (HT) allows a single processor to appear and function as multiple logical processors by duplicating the architectural state and sharing execution resources. It enables two threads to be executed simultaneously, improving performance on multi-threaded applications. HT provides benefits like higher throughput, improved response times, and increased server capacity, but requires workloads with multiple concurrent threads to see gains and adds overhead that can reduce performance of serial programs.

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CONTENTS Introduction HT Architecture Working principle Advantages & Disadvantages
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.
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
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.
Hyper threading technology
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
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
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
Conclusion Intels 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.
Hyper threading technology
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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 Intels 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.