Hi, I'm currently doing research into power profiling tools and PowerTop is one of the tools I would like to test. Because the research I'm doing is on server hardware I had to use an external power meter with PowerTop. I've decided to use a Watts Up? Pro meter because I already had one, so I changed the code (in src/measurement/extech.cpp) that reads from the Extech to read from the Watts Up? Pro. As a result PowerTop now reports on energy drain and that seems correct. I read in other threads that PowerTop needs to accumulate measurements before it can provide process-level power estimates. I also read that it should collect (roughly) over 100 measurements. So I ran PowerTop in calibration mode and then left it running for over 30 minutes (with an update interval of 1 second). Still I don't get the first column ("Power est.") shown in the About page of the website. I'm wondering how can I check if PowerTop is collecting measurements at all? Or do I just need to let it run for longer? Cheers, Miguel _________________________ Miguel Ferreira | Researcher +31 20 314 09 50 | m.ferreira(a)sig.eu Software Improvement Group | www.sig.eu