benchmarks: support tinymembench

[Fix-Point]

Summary

This patch adds tinymembench for memory bandwidth and latency measuring.

Impact

None.

Testing

Tested on QEMU/x86.

[cederom]

Hey there @Fix-Point :-) Do I miss the C files? :D

[nuttxpr]

[Experimental Bot, please feedback here]

No, this PR does not fully meet the NuttX Requirements.

Here's why:

• Summary: While it mentions the change (adding tinymembench), it lacks details.
  • Why is this change necessary? What problem does it solve or feature does it add?
  • How does tinymembench work? What does it measure and how?
• Impact: Even if the impact is minimal, you should explicitly state it. For example:
  • Impact on user: "Users can now use the tinymembench tool to benchmark memory performance."
  • Impact on documentation: "Documentation for tinymembench has been added."
• Testing:
  • Insufficient Detail: "Tested on QEMU/x86" is too vague. Specify the QEMU version, the exact x86 target (e.g., qemuarm, qemux86-64), and the NuttX configuration used.
  • Missing Logs: You need to provide actual testing logs before and after the change. This demonstrates the tool's functionality and proves the patch works as intended.

To improve this PR:

1. Expand the Summary: Explain the rationale and functionality of tinymembench.
2. Clarify Impact: Even if minimal, state the impact on users, documentation, etc.
3. Provide Detailed Testing Information: Include QEMU versions, target configurations, and actual testing logs demonstrating the tool's usage and results.

[Fix-Point]

Hey there @Fix-Point :-) Do I miss the C files? :D

Code downloading added. Problems should be fixed. =)

[cederom]

Thank you @Fix-Point :-)