可以将标准用于跨多个内核的并发分析吗？

Question

I notice that when I run a criterion benchmark (which does no forkIO or par ) compiled with -O2 -rtsopts -threaded -eventlog and +RTS -N2 -ls that real work (not just GC) is spread across both cores. A quick grep of the criterion source didn't show where the parallelism was originating.

I'd like to do some careful benchmarks measuring eg contentious updates on an MVar between two threads; can I do that accurately with criterion (for instance if all of that parallelism is happening between tests)?

Answer 1

我在测试中的每个IO动作前后都添加了traceEventIO ，在执行测试代码的过程中，它看起来完全是单线程的，所以我认为应该不错。