---
id: pr-tensorrt-llm-13219
repo: NVIDIA/TensorRT-LLM
pr: 13219
title: '[TRTLLM-34871][feat] Add cute dsl FP8 paged MQA logits decode kernel'
author: limin2021
date: '2026-05-09'
url: https://github.com/NVIDIA/TensorRT-LLM/pull/13219
source_category: upstream-code
architectures:
- sm100
tags:
- DSA
- arch_pipeline
- attention kernel
- attention_kv
- benchmark kernel
- blackwell
- compiler_runtime
- cuda kernel
- cute dsl
- cutlass
- fp8
- gemm_quant
- paged MQA
- scheduler_autotune
- sm100
techniques:
- autotuning
- fine-grained-quantization
- pipeline-stages
- tile-scheduling
hardware_features:
- blackwell
- fp8
kernel_types:
- attention
- compiler
- decode
- gemm
- runtime
- scheduler
languages:
- cuda-cpp
- cute-dsl
captured_at: '2026-05-16'
status: merged
merge_sha: c0d86d0e668e460b3756bf83bda55c1b17828cea
inclusion_reason: Preserve page/KV/layout and plan-run contracts; profile memory traffic separately from math utilization.
changed_paths:
- tensorrt_llm/_torch/attention_backend/sparse/dsa.py
- tensorrt_llm/_torch/custom_ops/cute_dsl_custom_ops.py
- tensorrt_llm/_torch/cute_dsl_kernels/blackwell/paged_mqa_logits/__init__.py
- tensorrt_llm/_torch/cute_dsl_kernels/blackwell/paged_mqa_logits/fp8_paged_mqa_logits.py
- tensorrt_llm/_torch/model_config.py
- tensorrt_llm/llmapi/llm_args.py
- tests/unittest/_torch/attention/sparse/test_cute_dsl_fp8_paged_mqa_logits.py
- tests/unittest/_torch/attention/sparse/test_dsa_indexer.py
artifact_dir: evidence/pull-bundles/tensorrt-llm/gh-13219
head_ref_oid: 4bcbd79a5d9024f70c9206b9095171555c7a4c88
---
# [TRTLLM-34871][feat] Add cute dsl FP8 paged MQA logits decode kernel

- Repository: `NVIDIA/TensorRT-LLM`
- PR: [13219](https://github.com/NVIDIA/TensorRT-LLM/pull/13219)
- Decision: `Preserve page/KV/layout and plan-run contracts; profile memory traffic separately from math utilization.`
- Reason: Preserve page/KV/layout and plan-run contracts; profile memory traffic separately from math utilization.

## Changed Paths

- `tensorrt_llm/_torch/attention_backend/sparse/dsa.py`
- `tensorrt_llm/_torch/custom_ops/cute_dsl_custom_ops.py`
- `tensorrt_llm/_torch/cute_dsl_kernels/blackwell/paged_mqa_logits/__init__.py`
- `tensorrt_llm/_torch/cute_dsl_kernels/blackwell/paged_mqa_logits/fp8_paged_mqa_logits.py`
- `tensorrt_llm/_torch/model_config.py`
- `tensorrt_llm/llmapi/llm_args.py`
- `tests/unittest/_torch/attention/sparse/test_cute_dsl_fp8_paged_mqa_logits.py`
- `tests/unittest/_torch/attention/sparse/test_dsa_indexer.py`

## Evidence Bundle

`evidence/pull-bundles/tensorrt-llm/gh-13219`
