---
id: pr-flashinfer-2422
repo: flashinfer-ai/flashinfer
pr: 2422
title: 'refactor: reduce hopper''s gdn prefill compilation time and fix docstring.'
author: yzh119
date: '2026-02-04'
url: https://github.com/flashinfer-ai/flashinfer/pull/2422
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- prefill
- tile-scheduling
- tma
techniques:
- tile-scheduling
hardware_features:
- tma
kernel_types:
- prefill
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 6ae5bfe6a48c591a171f32888e5de28b9ca0207b
inclusion_reason: kernel file changes
changed_paths:
- csrc/flat_prefill_kernel_delta_rule_sm90_extern.inc
- csrc/gdn_prefill_launcher.cu
- csrc/gdn_prefill_sm90_kernel_inst.jinja
- csrc/prefill_kernel_delta_rule_sm90.cu
- flashinfer/gdn_prefill.py
- flashinfer/jit/core.py
- flashinfer/jit/gdn.py
- include/flashinfer/flat/ampere/collective/flat_collective_inverse.hpp
- include/flashinfer/flat/ampere/collective/flat_collective_load.hpp
- include/flashinfer/flat/common.hpp
- include/flashinfer/flat/cute_ext.hpp
- include/flashinfer/flat/debug.hpp
- include/flashinfer/flat/hopper/collective/flat_collective_load.hpp
- include/flashinfer/flat/hopper/collective/flat_collective_store.hpp
- include/flashinfer/flat/hopper/collective/flat_collective_tma_warpspecialized_delta_rule.hpp
- include/flashinfer/flat/hopper/collective/flat_common.hpp
- include/flashinfer/flat/hopper/collective/flat_named_barriers.hpp
- include/flashinfer/flat/hopper/device/device_universal.hpp
- include/flashinfer/flat/hopper/kernel/flat_kernel_builder_delta_rule.hpp
- include/flashinfer/flat/hopper/kernel/flat_kernel_tma_warpspecialized_delta_rule.hpp
- include/flashinfer/flat/hopper/kernel/flat_options.hpp
- include/flashinfer/flat/hopper/kernel/flat_tile_scheduler.hpp
- include/flashinfer/flat/math.hpp
- include/flashinfer/flat/math_order_barrier.hpp
- include/flashinfer/flat/prefill/prefill_kernel.hpp
- include/flashinfer/flat/prefill/prefill_kernel_delta_rule_sm90.cuh
- include/flashinfer/flat/type_traits.hpp
- include/flashinfer/flat/unused.hpp
- tests/gdn/test_prefill_delta_rule.py
head_ref_oid: a5127e4ae1816480baa755e0e115d67fefd3a83f
artifact_dir: evidence/pull-bundles/flashinfer/gh-2422
---
# refactor: reduce hopper's gdn prefill compilation time and fix docstring.

- Repository: `flashinfer-ai/flashinfer`
- PR: [2422](https://github.com/flashinfer-ai/flashinfer/pull/2422)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/flat_prefill_kernel_delta_rule_sm90_extern.inc`
- `csrc/gdn_prefill_launcher.cu`
- `csrc/gdn_prefill_sm90_kernel_inst.jinja`
- `csrc/prefill_kernel_delta_rule_sm90.cu`
- `flashinfer/gdn_prefill.py`
- `flashinfer/jit/core.py`
- `flashinfer/jit/gdn.py`
- `include/flashinfer/flat/ampere/collective/flat_collective_inverse.hpp`
- `include/flashinfer/flat/ampere/collective/flat_collective_load.hpp`
- `include/flashinfer/flat/common.hpp`
- `include/flashinfer/flat/cute_ext.hpp`
- `include/flashinfer/flat/debug.hpp`
- `include/flashinfer/flat/hopper/collective/flat_collective_load.hpp`
- `include/flashinfer/flat/hopper/collective/flat_collective_store.hpp`
- `include/flashinfer/flat/hopper/collective/flat_collective_tma_warpspecialized_delta_rule.hpp`
- `include/flashinfer/flat/hopper/collective/flat_common.hpp`
- `include/flashinfer/flat/hopper/collective/flat_named_barriers.hpp`
- `include/flashinfer/flat/hopper/device/device_universal.hpp`
- `include/flashinfer/flat/hopper/kernel/flat_kernel_builder_delta_rule.hpp`
- `include/flashinfer/flat/hopper/kernel/flat_kernel_tma_warpspecialized_delta_rule.hpp`
- `include/flashinfer/flat/hopper/kernel/flat_options.hpp`
- `include/flashinfer/flat/hopper/kernel/flat_tile_scheduler.hpp`
- `include/flashinfer/flat/math.hpp`
- `include/flashinfer/flat/math_order_barrier.hpp`
- `include/flashinfer/flat/prefill/prefill_kernel.hpp`
- `include/flashinfer/flat/prefill/prefill_kernel_delta_rule_sm90.cuh`
- `include/flashinfer/flat/type_traits.hpp`
- `include/flashinfer/flat/unused.hpp`
- `tests/gdn/test_prefill_delta_rule.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2422`
