rocm-systems/projects/rocprofiler-compute/docs/reference/faq.rst

.. meta::
    :description: ROCm Compute Profiler FAQ and troubleshooting
    :keywords: ROCm Compute Profiler, FAQ, troubleshooting, ROCm, profiler, tool, Instinct,
               accelerator, AMD, SSH, error, version, workaround, help

***
FAQ
***

Frequently asked questions and troubleshooting tips.

python ast error: 'Constant' object has no attribute 'kind'
===========================================================

This error arises from a bug in the default ``astunparse 1.6.3`` with
``python 3.8``. The error doesn't seem to occur with Python 3.7 or 3.9.

Workaround:

.. code-block:: shell

   $ pip3 uninstall astunparse
   $ pip3 astunparse

tabulate doesn't print properly
===============================

To get around this issue, set the following environment variables to update your
locale settings.

.. code-block:: shell

   $ export LC_ALL=C.UTF-8
   $ export LANG=C.UTF-8

Why does VALU utilization exceed the theoretical peak?
======================================================

In specific circumstances, the GPU can co-issue two VALU instructions in the same clock cycle. This may result in an observed VALU Utilization and FP64 VALU FLOP values above the theoretical peak. This is expected hardware behavior and not a measurement error.

This dual-issue capability can be further investigated via:

* **ROCm Compute Viewer**: The Instructions view shows when two instructions are issued to the VALU in the same cycle.
* **On MI350 and newer platforms**: Starting in ROCm 7.2.0, the ``Dual-issue VALU Utilization`` metric shows the % of time when VALU is executing dual-issued instructions.

When ROCm Compute Profiler detects values exceeding their theoretical peaks, it displays a warning message indicating this behavior.

How can I SSH tunnel in MobaXterm?
==================================

1. Open MobaXterm.
2. In the top ribbon, select **Tunneling** to access tunneling options.

   .. image:: ../data/faq/tunnel_demo1.png
      :align: center
      :alt: MobaXterm Tunnel button
      :width: 800

   This pop-up should appear.

   .. image:: ../data/faq/tunnel_demo2.png
      :align: center
      :alt: MobaXterm pop-up
      :width: 800

3. Select **New SSH tunnel**.

   .. image:: ../data/faq/tunnel_demo3.png
      :align: center
      :alt: MobaXterm pop-up
      :width: 800

4. Configure the SSH tunnel.

   Local clients
     * ``<Forwarded port>``: ``[PORT]``

   Remote server
     * ``<Remote server>``: ``localhost``
     * ``<Remote port>``: ``[PORT]``

   SSH server
     * ``<SSH server>``: *name of the server to connect to*
     * ``<SSH login>``: *username to login to the server*
     * ``<SSH port>``: ``22``