A brief examination of our x86 evergreen hosts shows that hyperthreading is enabled. As per https://www.mongodb.com/docs/manual/administration/production-notes/ , the recommendation is that hyperthreading is disabled for MongoDB.

We should run our perf tests on x86 with it disabled. See https://aws.amazon.com/blogs/compute/disabling-intel-hyper-threading-technology-on-amazon-linux/.

We should also consider if we run a set of non-standalone tests with it which match what the mongodb usage would be.