Stacks API Examples

Onload User Guide (UG1586)

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1.2 English

Using a combination of the EF_DONT_ACCELERATE environment variable and the function onload_set_stackname(), the user is able to control/select sockets which are to be accelerated and isolate these performance critical sockets and threads from the rest of the system.

The following examples demonstrate using onload_set_stackname():

  • This thread will use stack foo, other threads in the stack will continue as before.
    onload_set_stackname(ONLOAD_THIS_THREAD, ONLOAD_SCOPE_GLOBAL, "foo")
  • All threads in this process will get their own stack called foo. This is equivalent to the EF_STACK_PER_THREAD environment variable.
    onload_set_stackname(ONLOAD_ALL_THREADS, ONLOAD_SCOPE_THREAD, "foo")
  • All threads in this process will share a stack called foo. If another process did the same function call it will get its own stack.
    onload_set_stackname(ONLOAD_ALL_THREADS, ONLOAD_SCOPE_PROCESS, "foo")
  • All threads in this process will share a stack called foo. If another process run by the same user did the same, it would share the same stack as the first process. If another process run by a different user did the same it would get is own stack.
    onload_set_stackname(ONLOAD_ALL_THREADS, ONLOAD_SCOPE_USER, "foo")
  • Equivalent to EF_NAME. All threads will use a stack called foo which is shared by any other process which does the same.
    onload_set_stackname(ONLOAD_ALL_THREADS, ONLOAD_SCOPE_GLOBAL, "foo")
  • Equivalent to EF_DONT_ACCELERATE. New sockets/pipes will not be accelerated until another call to onload_set_stackname().