What is iocp windows?

Input/output completion port (IOCP) is an API for performing multiple simultaneous asynchronous input/output operations in Windows NT versions 3.5 and later, AIX and on Solaris 10 and later. An input/output completion port object is created and associated with a number of sockets or file handles.

How do I enable IOCP?

To enable IOCP, set IOCP to Available using the following procedure:

  1. Log in as root and run the following command:
  2. Select Change / Show Characteristics of I/O Completion Ports.
  3. Change configured state at system restart from Defined to Available .
  4. Run the lsdev command to confirm the IOCP status is set to Available :

How do I know if IOCP is enabled in Linux?

To configure IOCP:

  1. To check whether the IOCP module is installed on your system, enter the following command: $ lslpp -l bos.iocp.rte.
  2. Check whether the status of the IOCP port is Available by entering the following command: $ lsdev -Cc iocp.
  3. If the IOCP port status is Defined , perform the following steps:

What is an IO completion port?

Though their name seems to suggest they’re all about IO requests, IO Completion Ports can also be used for general purpose thread pools.

What are the operations involved in using a completion port?

There are a few operations involved in using a completion port: A completion port is created using the CreateIoCompletionPort function. It can get confusing since the same function is used to associate the completion port with a file handle. Here’s how to create a completion port object:

Is the completion port model a good one?

Its proponents believe (with good reason) that the completion port model is a good one for supporting interleaved reads and writes acrosss multiple threads without blocking.

What is the direction of transfer of data from IO port?

“num bytes” of data have been transferred into the block pointed by the OVERLAPPED structure. The direction of the transfer is dependant on the call made to the IO port, it’s up to the user to remember if it was a read or a write (usually by stashing extra data in the OVERLAPPED structure).

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