What is thread Level Speculation?
What is thread Level Speculation?
Thread Level Speculation (TLS) is a technique to speculatively execute a section of computer code that is anticipated to be executed later in parallel with the normal execution on a separate independent thread.
What is Speculation in programming?
Speculation (also known as speculative loading ), is a process implemented in Explicitly Parallel Instruction Computing ( EPIC ) processors and their compiler s to reduce processor-memory exchanging bottlenecks or latency by putting all the data into memory in advance of an actual load instruction.
What is speculative execution in computer architecture?
Speculative execution is an optimization technique where a computer system performs some task that may not be needed. Work is done before it is known whether it is actually needed, so as to prevent a delay that would have to be incurred by doing the work after it is known that it is needed.
What is speculative parallelism?
Abstract. The most promising technique for automatically parallelizing loops when the system cannot determine dependences at compile time is speculative parallelization. Also called thread-level speculation, this technique assumes optimistically that the system can execute all iterations of a given loop in parallel.
Which property is used to enable/disable speculative execution?
Speculative execution is enabled by default. You can disable speculative execution for the mappers and reducers by setting the mapred. map.
What is speculative load?
Size. This entry stores the target register executing the speculative load, a portion of the physical address of the load target, and the byte size of the load quantity. When an advanced load is executed, it checks for any existing entries for the same register, and overwrites those entries if necessary.
How speculative execution can help the system speed up?
Speculative execution is a technique used by modern CPUs to speed up performance. The CPU may execute certain tasks ahead of time, “speculating” that they will be needed. If the tasks are required, a speed-up is achieved, because the work is already complete.
