Adding smoketest preset for simple correctness tests

[gilbertlee-amd]

Motivation

Adds a simple smoketest preset into TransferBench to perform simple correctness tests. Knobs exist to allow for more thorough tests, however defaults are chosen to try to keep run-times short.

Technical Details

This preset tests DMA/GFX copies between host and device, between two devices, as well as broadcast / gather and all to all.
It supports multi-rank, and has knobs for controlling the Transfer sizes to sweep (SIZE_LIST), as well as how many GFX subexecutors to use (GFX_SE_LIST). For performance reasons, SE_MAX_BYTES is used to limit the total amount of bytes a single GFX Subexecutor (CU/WGP) will Transfers - for example skipping tests copying 1GB using only 1 CU. TEST_LISTS can be used to specify a subset of tests to run, and accepts ranges such as 1-7. Copies are done in parallel

Test Plan

Testing of the various knobs were tried, as well as fault-injection to confirm that failures would be shown.

Test Result

Sample output:

[smoketest-preset Related]
CPU_MEM_TYPE         =            0 : Using default CPU (0=default, 1=coherent, 2=non-coherent, 3=uncached, 4=unpinned)
GFX_SE_LIST          =            2 : Testing GFX with subexecutor counts: 1,256
GPU_MEM_TYPE         =            0 : Using default GPU (0=default, 1=fine-grained, 2=uncached, 3=managed)
SIZE_LIST            =            3 : Transfer sizes tested: 1K,16M,256M
SE_MAX_BYTES         =         128M : Each SubExecutor can work on at most 134217728 bytes
TEST_LIST            =           14 : Running all tests

Running tests on 8 GPUs total across 1 rank(s)
Legend: *=Pass .=Skip F=Fail
                                                | GFX | GFX |
| Name                      | Test | DMA | Test | 001 | 256 |
|---------------------------|------|-----|------|-----|-----|
| Copy (H2D)                |  01  | *** |  08  | **. | .** |
| Copy (D2H)                |  02  | *** |  09  | **. | .** |
| Copy (D2D) (Remote Write) |  03  | *** |  10  | **. | .** |
| Copy (D2D) (Remote Read ) |  04  | *** |  11  | **. | .** |
| Broadcast  (One to All)   |  05  | *** |  12  | **. | .** |
| Gather     (All to One)   |  06  | *** |  13  | **. | .** |
| All To All                |  07  | *** |  14  | **. | .** |
|---------------------------|------|-----|------|-----|-----|

All tests passed

[Copilot]

Pull request overview

Adds a new smoketest preset to TransferBench to run a small suite of correctness-focused DMA/GFX transfer checks across common patterns (H2D/D2H/D2D, broadcast, gather, all-to-all), with environment-variable knobs to control sizes, subexecutor counts, and test selection.

Changes:

• Introduces a new smoketest preset implementation and registers it in the preset dispatch map.
• Adds EnvVars helpers for parsing string arrays and for printing string vectors.
• Updates changelog; includes a small validation-path tweak and whitespace cleanup.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
src/client/Presets/SmokeTest.hpp	New smoketest preset logic, env-var knobs, and tabular output.
src/client/Presets/Presets.hpp	Registers the new smoketest preset.
src/client/EnvVars.hpp	Adds string-array env-var parsing + string-vector formatting helper.
src/header/TransferBench.hpp	Adjusts validation mismatch handling in ValidateAllTransfers().
src/client/Utilities.hpp	Removes trailing whitespace.
CHANGELOG.md	Documents the new preset.

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