2. Types Multi Thread Model:
To establish relationship between user thread and kernel
thread it’s called multi threading model.
Many-to-one model
One-to-one model
Many-to-many model
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3. Many-to-one model:
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• Many user level thread to one kernel
level thread.
• Thread management is done by the
thread library in user space.so,it is
efficient.
• The entire process will block if a thread
makes a blocking system call.
• Multiple threads are unable to run in
parallel of multiprocessors.
• Ex: ticket booking
4. One-to-one model:
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• Each user thread have one kernel thread.
• Provides more concurrency then the
many-to-many model by allowing
another thread to run when a thread
makes a blocking system call.
• Also multiple threads run in a parallel of
multi processor.
• Creating a user thread requires
corresponding level of kernel thread.
5. Many-to-many-model:
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• Multiplexes many user-level threads to a
smaller or equal number of kernel threads.
• The number of kernel threads may be
specific to either a particular application or
a particular machine.
• Also, when a thread performs a blocking
system call, the kernel can schedule another
thread for execution.
• Ex: network
