flashinfer.testing

This module provides comprehensive testing utilities for benchmarking, performance analysis in FlashInfer.

Test Environment Setup

set_seed(random_seed)	Set random seed for reproducibility during testing.
sleep_after_kernel_run(execution_time)	Sleep after kernel run.

Performance Analysis

FLOPS Calculation

attention_flops(batch_size, qo_seqlen, ...)	Calculate FLOPs for a given attention layer.
attention_flops_with_actual_seq_lens(...)	Calculate FLOPs for a given attention layer with actual sequence lengths where actual sequence lengths are provided as 1D tensors.
attention_tflops_per_sec(batch_size, ...)	Calculate TFLOPS per second for a given attention layer.
attention_tflops_per_sec_with_actual_seq_lens(...)	Calculate TFLOPS per second for a given attention layer with actual sequence lengths.

Throughput Analysis

attention_tb_per_sec(batch_size, qo_seqlen, ...)	Calculate TB per second perf achieved for a given attention layer.
attention_tb_per_sec_with_actual_seq_lens(...)	Calculate TB per second perf achieved for a given attention layer with actual sequence lengths.

GPU Benchmarking

bench_gpu_time(fn[, dry_run_iters, ...])	Unified GPU benchmarking interface with configurable timing backends.
bench_gpu_time_with_cuda_event(fn[, ...])	Benchmark kernel execution time using CUDA events (no CUDA graphs).
bench_gpu_time_with_cudagraph(fn[, ...])	Benchmark GPU time using CUDA graphs with amortized kernel launch overhead.
bench_gpu_time_with_cupti(fn[, ...])	Benchmark GPU time using CUPTI activity tracing for precise kernel timing.