Il giorno mer, 27/11/2019 alle 08.14 +0000, Schmid, Carsten ha scritto: > > > > > Then I started another set of 100 trials and let them run > tonight, and > > > the first 10 trials were around 1000s, then gradually decreased > to > > > ~300s, and finally settled around 200s with some trials below > 70-80s. > > > This to say, times are extremely variable and for the first time > I > > > noticed a sort of "performance increase" with time. > > > > > > > The sheer volume of testing (probably some terabytes by now) would > > exercise the wear leveling algorithm in the FTL. > > > But with "old kernel" the copy operation still is "fast", as far as > i understood. > If FTL (e.g. wear leveling) would slow down, we would see that also > in > the old kernel, right? > > Andrea, can you confirm that the same device used with the old fast > kernel is still fast today? Yes, it is still fast. Just ran a 100 trials test and got an average of 70 seconds with standard deviation = 6 seconds, aligned with the past values of the same kernel. Thanks, Andrea
