Re: Compiler support for multicore architectures

gaurav <gauravgautam123@gmail.com> writes:


> What different things can a compiler do to make mutithreaded programs
> run better on multicore? Isnt it much depends on the threading
> library , OS and the programmar instead on compiler ?


In general, yes, it is. However, it's worth noting that one key
element of modern multithreaded programming does require compiler
support: Thread Local Storage. This permits C/C++ programmers to
write, e.g.,
        __thread int x;
to declare a thread local variable. The compiler has to generate the
right code sequences to access this variable, including support for
different TLS models.


The compiler must also provide access to basic synchronization
mechanisms, such as the __sync_ intrinsic functions originally defined
by Intel.


Ian

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