What's the relation between hyper threading and multi-threading ?

Question

I wrote a multi-threaded program using pthread library, but I want execution of threads in a specific order.
What I have to do ?

Answer 1

Term "Hyper Threading" is used in the context of processor architecture.
Now and days, each core supports hyper threading. It means one core has some redundant component to supports concurrent execution of independent threads.
Term "Multi threading" is used in the context of software.
An application may be multi-threaded. The objective behind to create multi-threaded software to reduce the turn around time of process, to create multiple flow of execution etc.

Answer 2

Hyperthreading is implemented at hardware level and marketed by Intel. From programming side two hyperthread look like two CPU cores and from the hardware side, multiple hyperthreads share a single core.

Multithreading is a concept of more then one thread (software level) i.e. light weight process so that multiple section of a process can be simultaneously processed and can avoid heavy context switching in case of multi-processes.