### What this PR does / why we need it?
This PR optimizes the torch_npu profiler configuration to significantly
reduce overhead and trace file size. The key changes include:
**Enable Data Simplification**: Explicitly sets data_simplification=True
in _ExperimentalConfig. This filters out unnecessary intermediate data
during profiling, drastically reducing the memory footprint and I/O
overhead.
**Use Lightweight Stack Tracing**: Replaces with_stack with with_modules
when torch_profiler_with_stack is enabled. In torch_npu, with_stack
introduces heavy latency. with_modules provides equivalent semantic
information with much lower overhead.
**Code Simplification:** Removes redundant parameter configurations in
_ExperimentalConfig by utilizing default values, making the codebase
cleaner and easier to maintain.
**Test setup:**
max length = 50, profiler + stack enabled
**Before optimization:**
Profiler data size: 651 MB
Generate time: 3 seconds
**After optimization:**
Profiler data size: 156 MB (≈76% reduction)
Generate time: <1 second
### Does this PR introduce _any_ user-facing change?
No API changes. Users profiling on Ascend will experience faster
profiling execution and smaller trace files when stack tracing is
enabled.
### How was this patch tested?
Manually verified on Ascend NPU by running vLLM with the profiler
enabled. Confirmed that trace files are generated correctly containing
necessary stack/module info, while showing the reported reduction in
size and time.
- vLLM version: v0.13.0
- vLLM main:
d68209402d
Signed-off-by: mengchengTang <745274877@qq.com>
41eb71d665