multicore

I know that now that most processors have two or more cores, multicore programming is all the rage. Is there functionality to utilize this in Java? I know that Java has a Thread class, but I also know this was around a long time before multicores became popular. If I can make use of multiple cores in Java, what class/technique would I use? bakkal Does Java have support for multicore processors/parallel processing? Yes. It also has been a platform for other programming languages where the implementation added a "true multithreading" or "real threading" selling point. The G1 Garbage Collector

Quick question: what is the compiler flag to allow g++ to spawn multiple instances of itself in order to compile large projects quicker (for example 4 source files at a time for a multi-core CPU)? You can do this with make - with gnu make it is the -j flag (this will also help on a uniprocessor machine). For example if you want 4 parallel jobs from make: make -j 4 You can also run gcc in a pipe with gcc -pipe This will pipeline the compile stages, which will also help keep the cores busy. If you have additional machines available too, you might check out distcc , which will farm compiles out

In Linux world, to get nano seconds precision timer/clockticks one can use : #include <sys/time.h> int foo() { timespec ts; clock_gettime(CLOCK_REALTIME, &ts); //--snip-- } This answer suggests an asm approach to directly query for the cpu clock with the RDTSC instruction. In a multi-core, multi-processor architecture, how is this clock ticks/timer value synchronized across multiple cores/processors? My understanding is that there in inherent fencing being done. Is this understanding correct? Can you suggest some documentation that would explain this in detail? I am interested in Intel Nehalem

Two new keywords added to the C# 5.0 language are async and await , both of which work hand in hand to run a C# method asynchronously without blocking the calling thread. My question is, do these methods actually take advantage of multiple cores and run in parallel or does the async method run in the same thread core as the caller? Two new keywords added to the C# 5.0 language are async and await, both of which work hand in hand to run a C# method asynchronously without blocking the calling thread. That gets across the purpose of the feature, but it gives too much "credit" to the async/await