On Wednesday, June 30, 2021 12:57:48 AM CEST Cornelius Schumacher wrote: > On 29.06.21 19:38, Arjun AK wrote: > > I don't think measuring current on a Desktop is the right way to do > > this. Your desktop is going to be too "noisy" when it comes to power > > measurements. Activity from components like hard disk, WiFi/BT, Ethernet > > or other software during the testing would end up affecting the > > measurements.
Like noticed in the measurements at Umweltcampus, this noise can be filtered out by running multiple tests. > > It would be better off doing this on a SBC (maybe a PI2?), > > with as much hardware turned off as possible and running a minimum set > > of software. Measurements could be done with a multimeter[1] or maybe > > even a INA219[2]. > > Part of the measurement is to also record system utilisation such as > harddisk or network activity. That makes it possible to at least to some > degree account for the noisy part. Indeed. And on a typical desktop computer we still have the opportunity to measure power consumption of individual components. > It's also a tradeoff between measuring in a realistic scenario which is > close to normal use and a prepared setup which is aimed at getting more > exact numbers. > > I think it would be interesting to do both and see what the numbers say. I think it would also make sense to compare direct power measurements to software metrics, like tick counters or the power display in KSysguard. > There certainly is a lot to be learned and to be improved here. For me > the most important step is to be more aware of energy consumption and to > try to get numbers at all. Any insight is welcome :-) +1 :) Cheers, David
