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.. _vcl_ldpreload_doc:

LD_PRELOAD the VCL
==================

vcl-ldpreload is a LD_PRELOAD library that uses the VPP Communications Library (VCL).

User can LD_PRELOAD any application that uses POSIX socket API.

NOTE: The sources have been moved to ``vpp/src/vcl`` and ``libvcl_ldpreload.so`` is built with VPP and can be found in
``vpp/build-root/install-vpp[_debug]-native/vpp/lib``

1. Running the demo
-------------------

Run test script without parameters to see help menu:

::

    export WS_ROOT= (e.g. /scratch/my_name/vpp)
    $WS_ROOT/test/scripts/socket_test.sh


2. Docker iPerf examples
------------------------

These launch xterms. To quit, close xterms and run following docker kill cmd (WARNING: This will kill all docker containers!) ‘docker kill $(docker ps -q)’

Docker iPerf using default Linux Bridge

::

    $WS_ROOT/test/scripts/socket_test.sh -bi docker-kernel


Docker iPerf using VPP

::

    $WS_ROOT/test/scripts/socket_test.sh -bi docker-preload