Hi, fio needs to know what the period it should be sampling the latency over. If the latency was OK in the current latency window it can up the iodepth by one and start a new latency window thus repeating the process. Without a window you will (by definition) have no samples to look at! On 11 April 2018 at 10:01, Larry Chen <lchen@xxxxxxxx> wrote: > Hi Sitsofe, > Thanks for your explain. > I found that if latency_target is specified, latency_window must be along > with latency_target option. > If not, fio will exit immediately. > Why the case is like that? -- Sitsofe | http://sucs.org/~sits/ -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
