laoyao0822andOmX
1ebde44e59
Index skip reduces the number of target layers that own NSA index state, but PD transfer and HiCache still assumed dense full-layer state buffers. This change carries explicit state layer IDs through prefill/decode registration, compacts device and host index buffers to active layers, and maps logical layer IDs to compact slots on transfer paths. The PD side fails fast when prefill/decode disagree on NSA state layer identity instead of silently truncating or copying mismatched buffers. Host direct tests now use the same CPU-index descriptor contract required by the TAI cudaMemcpyBatchAsync path, and host registered memory is unregistered on tensor finalization to avoid stale cudaHostRegister state across CUDA tests. Constraint: CP shared-KV with index_topk skip must keep target/draft state identity explicit before compacting buffers Constraint: Direct HiCache TAI transfer rejects CUDA indices to avoid hidden D2H copies on the control path Rejected: Keep full-layer L1/L2 index buffers | wastes the memory/bandwidth that index skip is meant to save Rejected: Infer state buffer order by count only | can silently corrupt cache when active layer sets differ Confidence: high Scope-risk: moderate Directive: Do not compact or reorder NSA state buffers without carrying logical layer IDs through PD registration and validating both sides Tested: Remote container py_compile for touched runtime files Tested: Remote container pytest: test_nsa_pool_host_unit.py, test_model_runner_kv_cache_mixin.py, test_cp_shared_kv_transfer_mapping.py, test_pd_state_layer_ids.py, test_cp_per_layer_transfer.py, test_cp_shared_kv_runtime.py -> 200 passed, 2 subtests passed Not-tested: Full ETE GSM8K/replay after compacted P3-P6 changes Co-authored-by: OmX <omx@oh-my-codex.dev>
Unit Tests
Component-level tests that do not launch a server or load model weights. Tests can use CPU or GPU — the key criterion is no server process.
Quick Start
- Find the source file under
python/sglang/srt/. - Create the corresponding test here, mirroring the source tree:
srt/mem_cache/radix_cache.py → unit/mem_cache/test_radix_cache.py srt/sampling/sampling_params.py → unit/sampling/test_sampling_params.py - Register for CI at the top of the file (after imports, before test classes):
from sglang.test.ci.ci_register import register_cpu_ci register_cpu_ci(est_time=5, suite="stage-a-test-cpu") # or: register_cuda_ci(est_time=10, suite="stage-b-test-1-gpu-small") - Run locally:
pytest test/registered/unit/ -v # all unit tests pytest test/registered/unit/mem_cache/ -v # one module - Run with coverage:
# summary pytest test/registered/unit/ --cov --cov-config=.coveragerc -v # PR incremental check (require ≥60% on changed lines) pytest test/registered/unit/ --cov --cov-config=.coveragerc --cov-report=xml diff-cover coverage.xml --compare-branch=origin/main --fail-under=60
Example
"""Unit tests for <module> — no server, no model loading."""
from sglang.test.ci.ci_register import register_cpu_ci
register_cpu_ci(est_time=5, suite="stage-a-test-cpu")
import unittest
from sglang.srt.<module> import TargetClass
from sglang.test.test_utils import CustomTestCase
class TestTargetClass(CustomTestCase):
def test_basic_behavior(self):
obj = TargetClass(...)
self.assertEqual(obj.method(), expected)
if __name__ == "__main__":
unittest.main()
Rules
- No
popen_launch_server()orEngine(...). - No model weight loading.
- Use
CustomTestCase(fromsglang.test.test_utils, adds CI retry). - Use
unittest.mockfor dependencies that are expensive to construct.