Test cases overview

Different test cases can be run by xbtest depending on the deployment platform and the xclbin capabilities. A failure in a test case does not stop other test cases.

Apart from the Verify test case, a test case is composed of, at minimum, a test sequence which contains the duration and some configuration parameters.

The following tables provides an overview of the supported test cases:

Test cases overview

Test case

Overview

Illustration

Verify

This test case:

  • Detects and reports available CUs.

  • Checks compatibility.

  • Displays platform definition.

  • Checks capabilities of all CUs.

  • Checks basic communication between the host and the CUs: read/write of a scratch register.

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DMA

This test case:

  • Checks data transfer between the host and the memories available on the card (for example: DDR/HBM).

  • Tests each memory individually.

  • Uses counter for data integrity check.

  • Measures read and write bandwidths between the host and the memories available on the card (for example: DDR/HBM).

Note

The DMA test case does not use any CUs, but it requires an xclbin with connection to the memory under test.
../../_images/test-case-dma.svg

DMA test case

P2P CARD

This test case:

  • Checks data transfer between the memories available on two Alveo cards (for example: DDR/HBM).

  • Tests each memory individually.

  • Uses counter for data integrity check.

  • Measures read and write bandwidths between the memories available on two Alveo cards (for example: DDR/HBM).

Note

The P2P CARD test case does not use any CUs, but it requires an xclbin with connection to the memory under test.
../../_images/test-case-p2p-card.svg

P2P CARD test case

P2P NVME

This test case:

  • Checks data transfer between a NVMe SSD and the memories available on an Alveo card (for example: DDR/HBM).

  • Tests each memory individually.

  • Uses counter for data integrity check.

  • Measures read and write bandwidths between a NVMe SSD and the memories available on an Alveo card (for example: DDR/HBM).

Note

The P2P CARD test case does not use any CUs, but it requires an xclbin with connection to the memory under test.
../../_images/test-case-p2p-nvme.svg

P2P NVME test case

Memory

This test case:

  • Checks data transfer between the CUs and:

    • Memories available on the card (for example: DDR HBM).

    • Memories available on the host via Slave Bridge.

  • Tests all memories separately with different a configuration for each memory type.

  • Uses PRBS31 for data integrity check and linear addressing.

  • Measure read and write bandwidths and latencies.
../../_images/test-case-memory.svg

Memory test case

Power

This test case:

  • Sets the power consumed by the card by controlling the toggle rate of the resources present in the CU.

Power CU only exercises the logic of the xclbin. The maximum and minimum power depend on the following:

  • Selected Alveo card.

  • Platform used (see Platform definition).

  • Configuration of other tests running at the same time as the Power test case.

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GT MAC

This test case:

  • Checks the GT transceiver of the Alveo card at 10 Gigabit Ethernet (10 GbE) and 25 Gigabit Ethernet (25 GbE) lane rates.

  • Uses the Xilinx XXV Ethernet IP core (see 10G/25G High speed ethernet subsystem product guide (PG210)).

  • Includes packet generators, checkers and counters to verify that all expected packets are received error free.

  • Supports configurable GT settings which allows the GT MAC CU to be connected to:

    1. A switch: optical or electrical cables.

    2. Directly Itself: loopback module or cables.

    3. A GT LPBK CU: optical or electrical cables.

    4. Another GT MAC CU (present in the same xclbin): optical or electrical cables.

    Note

    With the 3 first methods, the traffic is ultimately looped back to the GT MAC CU itself. With the last method, the traffic flows between GT MAC CU instances
../../_images/test-case-gt-mac.svg

GT MAC test case

GT PRBS

This test case:

  • Generates and checks 64/66b PRBS-31 data at 25GbE rate.
../../_images/test-case-gt-prbs.svg

GT PRBS test case

GT LPBK

This test case:

  • Loops back incoming 25GbE traffic by performing a rate adaptation.

Warning

This CU requires a 25GbE traffic source which could be GT MAC CU.
../../_images/test-case-gt-lpbk.svg

GT LPBK test case