Extended logging using Power Profiler Kit.

RE: Extended logging using Power Profiler Kit.

wlgrd — Wed, 30 May 2018 07:58:13 GMT

So for a 24 hour run, all you need is the time and value for the peak during this time frame?

It is possible to write data to file, but we also need to consider how to represent it. Writing ASCII values to a file will make it incredibly large after a short amount of time, so then we might need to store raw (binary) data and have some extra functionality to view the data set. We also have to give the user some options for logging, so you can choose according to requirements and system capabilities.

RE: Extended logging using Power Profiler Kit.

Sujan Nag — Tue, 29 May 2018 15:20:24 GMT

Yes, getting the average value over a period of time will also suffice for my application.

However, for my use case all I need is the timestamp and the peak value at that time. What I was thinking, rather than storing the data in memory, is it possible to push the data into a log file?

RE: Extended logging using Power Profiler Kit.

wlgrd — Tue, 29 May 2018 11:31:37 GMT

As Bjorn said; just altering the code would lead to too much data being aggregated, and your computer will most probably struggle a lot.

But, can I ask for more details about your use case? Would it be enough to periodically log the average number for a given interval, at a given time span? This way, for example, you can have an average taken over every 20s throughout the day. Storing every data point the ppk stremas would amount to _a lot_ of data to sift through by the end of the day, but by only logging average we might be able to run even longer logs as well.

RE: Extended logging using Power Profiler Kit.

Bjørn Kvaale — Tue, 29 May 2018 07:35:24 GMT

Most likely 24 hours would be a stretch too long. You can have a look at the source code for the ppk SW here. You can change the const variable in line 42 (BUFFER_LENGTH_IN_SECONDS). I would be careful to increase this value all too much, as it requires quite a bit of memory. You might be able to get 10 to 20 minutes of logging if you have enough memory & CPU power, but I doubt you'd be able to increase this value much more than that. If you increase the value too much, there might be some unintended memory consequences, so be careful.