An LLM inference engine for AMD RDNA3 with its GPU kernels written in Mojo. This page shows what the current machine-generated receipt measures, and keeps the rest of the engine's limits visible.
A working engine, with the limits attached
mojo-baro serves an OpenAI-compatible API on AMD RDNA3. This page separates what the repository ships from what this receipt actually measures.
01 / the machine
This block is read from results/report-gfx1100-AMD-Radeon-RX-7900-XTX-61eec10.json, written by bench/report.sh at commit 61eec10 on a clean tree.
Receipt self-check: valid, no problems recorded.
02 / the measured kernel
A pipelined WMMA kernel against the vendor library through the same C++ shim, with a 10.0-second clock warm-up and 200 timed iterations per point. It leads at 10 of 10 sampled sizes, with a best ratio of 1.38× at 1536³.
mojo-baro hipBLASLt bars scaled to 106,095 GFLOP/s
| Tamaño | mojo-baro | hipBLASLt | Proporción | Azulejo · warps · cuadrícula | Algoritmo del proveedor | Error máximo |
|---|---|---|---|---|---|---|
| 256³ | 6,444 | 6,230 | 1.03× | 64×64×32 · 2×2 · 4×4 | #25/32 | 1.7e-06 |
| 512³ | 31,807 | 26,107 | 1.22× | 64×64×32 · 2×2 · 8×8 | #21/32 | 1.4e-05 |
| 768³ | 64,239 | 54,931 | 1.17× | 64×64×32 · 2×2 · 12×12 | #21/32 | 2.1e-05 |
| 1024³ | 75,142 | 64,462 | 1.17× | 64×128×32 · 2×4 · 8×16 | #13/32 | 0.0e+00 |
| 1536³ | 93,840 | 68,067 | 1.38× | 128×128×32 · 4×2 · 12×12 | #13/32 | 0.0e+00 |
| 2048³ | 93,180 | 81,955 | 1.14× | 128×128×32 · 4×2 · 16×16 | #10/32 | 4.8e-07 |
| 2560³ | 98,333 | 83,983 | 1.17× | 128×128×32 · 4×2 · 20×20 | #0/32 | 9.5e-07 |
| 3072³ | 100,248 | 98,206 | 1.02× | 128×128×32 · 4×2 · 24×24 | #0/32 | 0.0e+00 |
| 3584³ | 106,095 | 85,027 | 1.25× | 128×128×32 · 4×2 · 28×28 | #0/32 | 0.0e+00 |
| 4096³ | 89,484 | 82,405 | 1.09× | 128×128×32 · 4×2 · 32×32 | #0/32 | 2.2e-04 |
GFLOP/s on this card, this ROCm, these sizes. Not a general claim about RDNA3 versus CDNA, and not shown to transfer to another card.
03 / engine results
The same repository carries a profile-driven dense path, matched-weight decode comparisons and speculative sampling. Each figure below stays beside the protocol that froze its question and its falsifier.
| Model | Arch | Agreement | tok/s_gen | Status |
|---|---|---|---|---|
| Llama-3.2-1B-Instruct Q4_K_M | llama | 95.3-100% | 451-458 | servable |
| Qwen2.5-7B-Instruct Q4_K_M | qwen2 | 96.9-100% | 96.8-97.8 | servable |
| granite-4.2-3b BF16 | granite | 98.4-100% | 164.5-169.0 | servable |
| lily-cybersecurity-7b Q6_K | llama (Mistral-arch, SPM) | 96.9-100% | 94.1-95.0 | servable |
All four targets are servable through the profile-driven Spark path. Source: bench/dense-protocol.md.
decode arms
Same box, same GGUF where noted, 20-prompt medians unless the protocol says otherwise.
| Model and weights | llama.cpp | mojo-baro | Ratio |
|---|---|---|---|
| Qwythos-9B, Q4_0 | 110.0 | 130.7 | 1.19x |
| Qwythos-9B, q8 | 74.1 | 68.8 | 0.94x |
| Ornith-1.5-9B, Q4_K_M | 88.8 | 80.8 | 0.91x |
The Q4_0 side has since moved to 136.1-136.8 tok/s_gen under bench/attn-protocol.md. llama.cpp was not re-measured in that stint, so no newer ratio is claimed.
Receipt: bench/attn-latency-protocol.md
speculative decode
20-prompt median, q4 pack, k=2. Output stayed identical to plain greedy decode on every prompt tested. Receipt: bench/mtp-protocol.md.
device sampling
One dense q4 stint. The sampler runs inside the decode loop. Receipt: bench/spec-sample-protocol.md.
MoE path
Mean teacher-forced agreement: 53.20/64 over 20 prompts. Decode: 111.89 tok/s_gen against llama.cpp at 109.92 on the same GGUF.
The two decode numbers come from different stints. That is stated here because the comparison is useful, but it is not a same-stint ratio. Receipt: bench/moe-persist-protocol.md.
04 / scope and next
ships now
Mojo kernels sit under an OpenAI-compatible API. The repository also carries dense and MoE engine paths, sampling, tool calls, checkpoints and state transfer.
measured here
This page publishes the receipt-backed WMMA comparison only. Hardware, ROCm, tile geometry, vendor algorithm choice and correctness error stay attached to each row.
measured engine
Four profile-driven dense targets are servable. Q4 decode and MoE results stay paired with their protocol caveats, including losing arms and different stints.
next design round
One request decodes at a time today. Batching is the next design round, not a shipped capability.
