---
title: "Discussion on \"My RoCE testbed passed. It was lying\" | Hashnode"
description: "Discussion on \"My RoCE testbed passed. It was lying\". A RoCE testbed passed its test while no RDMA write completed. How bpftrace on kfree_skb found the firewall dropping every packet."
url: "https://hashnode.com/posts/my-roce-testbed-passed-it-was-lying/6ac5a323a97d85f79be4f6e2"
---

[Feed](https://hashnode.com/feed) /

Discussion

# [My RoCE testbed passed. It was lying](https://pegasus-nathanael-tech.hashnode.dev/my-roce-testbed-passed-it-was-lying?utm_source=hashnode&utm_medium=feed)

A RoCE testbed passed its test while no RDMA write completed. How bpftrace on kfree\_skb found the firewall dropping every packet.

Oct 7 · 6 min read · pegasus-nathanael-tech.hashnode.dev  
Updated Nov 2  
Read the article

-   [#ebpf](https://hashnode.com/tag/ebpf)
-   [#rdma](https://hashnode.com/tag/rdma)
-   [#linux](https://hashnode.com/tag/linux)
-   [#networking](https://hashnode.com/tag/networking)
-   [#debugging](https://hashnode.com/tag/debugging)
-   [#observability](https://hashnode.com/tag/observability)
-   [#gpu](https://hashnode.com/tag/gpu)
-   [#ai-infrastructure](https://hashnode.com/tag/ai-infrastructure)

## Written by

[Nathanael FETUE](https://hashnode.com/@nathanael-fetue)

@nathanael-fetue · Toulouse

  
[View profile](https://hashnode.com/@nathanael-fetue)

From Cameroon to Cloud Engineering at ISAE-SUPAERO/ENSEEIHT |DeepTech & Distributed Systems

Hi, I'm Nathanael. MSc graduate from Toulouse INP - ENSEEIHT (N7), France. I work on hardware/software co-design and low-level performance. I just completed a six-month research internship at INRIA Rennes, where I designed a hardware isolation mechanism for processing-in-memory processors (UPMEM), measured in a cycle-accurate simulator at 5.54% overhead at most, against 26 to 120% for a software scheme, and validated on FPGA. I write about computer architecture, operating systems, networking (RDMA/InfiniBand) and the move from research to industry. I am looking for my first role in systems and performance engineering, AI infrastructure or low-level software. Stack: C/C++, Go, Python, Verilog, Linux, RDMA, Terraform, Ansible. Contact: nathanaelfetuefoko@gmail.com | linkedin.com/in/nathanael-fetue-foko | github.com/NathanaelFetue

## Responses 1

Markdown supported · ⌘↵ to post

[Nathanael FETUE](https://hashnode.com/@nathanael-fetue)

[Oct 7](https://hashnode.com/posts/my-roce-testbed-passed-it-was-lying/6ac5a323a97d85f79be4f6e2/comment/6ac5a3747ca79c2017e01731)

It\`s a great idea , trust me !