Improve this answer. Austin Hemmelgarn Austin Hemmelgarn 7, 1 1 gold badge 14 14 silver badges 26 26 bronze badges. Can you specifiy what you mean by "Grouping the code". All you have to do is fire up a thread and let the OS handle it. Can you clarify that? Erik There's no way to programmatically use HyperThreading directly.
You can however tell the scheduler what logical core to put each of your threads and processes on, which lets you control which thread on which physical core they get run on. On most systems, the two threads are grouped together in the logical core ordering so 0 and 1 are one physical core, 2 and 3 are the next, etc , so figuring out placement isn't hard. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.
Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta. What the application programmer needs is a system call that tells the operating system that "This application wants to run no more than one thread in each core and I don't want to share any core with any other processes".
Unfortunately, current operating systems have no such system call to my knowledge. Other microprocessor vendors use hyperthreading as well. In fact, there are rumors that AMD will use hyperthreading in some of their processors in the future.
Hyperthreading does indeed give a measurable advantage that shows in benchmark tests. This is a strong sales argument that may convince the confused consumer. But the microprocessor designer should also take into account that few applications are able to handle hyperthreading optimally. This is a technology that places a considerable burden on software developers as well as on operating system designers.
We may ask whether the silicon space that is used for implementing hyperthreading might be better used for other purposes? Flat V iew. S earch. L ist. List M essageboards.
H elp. Today, most high-end microprocessors have two or more cores. Multi-threaded applications take advantage of multi-core processors by running multiple threads simultaneously. If you are running four threads simultaneously on a processor with four cores you get four times as much work done per time unit. R eply To This Message. In parallel execution, the tasks to be performed by a process are broken down into sub-parts, and multiple CPUs or multiple cores process each sub-task at precisely the same time.
As you can see, at any given time, all processes are in execution. In reality, it is the sub-tasks of a process which are executing in parallel, but for better understanding, you can visualize them as processes. Therefore, parallelism is the real way in which multiple tasks can be processed at the same time. This type of situation can be found in systems having multicore processors, which includes almost all modern, commercial processors.
A thread is a unit of execution on concurrent programming. Multithreading is a technique which allows a CPU to execute many tasks of one process at the same time. These threads can execute individually while sharing their resources. Multithreading refers to the common task which runs multiple threads of execution within an operating system. It can include multiple system processes. StenSoft StenSoft 9, 21 21 silver badges 28 28 bronze badges.
I don't quite understand what you mean by "Triggering scheduler is not an option because that needs a context swich which is compared to RAM very slow. Do you know how much time each operation consumes? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.
The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta.
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