On 08/14/2013 06:11 PM, Theodore Ts'o wrote: > The point is that if the goal is to measure page fault scalability, we > shouldn't have this other stuff happening as the same time as the page > fault workload. will-it-scale does several different tests probing at different parts of the fault path: https://www.sr71.net/~dave/intel/willitscale/systems/bigbox/3.11.0-rc2-dirty/foo.html It does that both for process and threaded workloads which lets it get pretty good coverage of different areas of code. I only posted data from half of one of these tests here because it was the only one that I found that both had noticeable overhead in the filesystem code. It also showed substantial, consistent, and measurable deltas between the different filesystems. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html