Hi, Jeff On Mon, Nov 16, 2020 at 12:19 PM Jeff Hostetler <git@xxxxxxxxxxxxxxxxx> wrote: > > I can't really speak to NFS performance, but I have to wonder if there's > not something else affecting the results -- 4 and/or 8 core results are > better than 16+ results in some columns. And we get diminishing returns > after ~16. Yeah, that's a good point. I'm not sure yet what's causing the diminishing returns, but Geert and I are investigating. Maybe we are hitting some limit for parallelism in this scenario. > I'm wondering if during these test runs, you were IO vs CPU bound and if > VM was a problem. I would say we are more IO bound during these tests. While a sequential linux-v5.8 checkout usually uses 100% of one core in my laptop's SSD, in this setup, it only used 5% to 10%. And even with 64 workers (on a single core), CPU usage stays around 60% most of the time. About memory, the peak PSS was around 1.75GB, with 64 workers, and the machine has 10GB of RAM. But are there other numbers that I should keep an eye on while running the test? > I'm wondering if setting thread affinity would help here. Hmm, I only had one core online during the benchmark, so I think thread affinity wouldn't impact the runtime. Thanks, Matheus
