1.2 KiB
likwidenergy collector
In contrast to the more general likwid collector, this collector just reads the RAPL counters to provide energy metrics. In contrast to the likwid collector, this collector keeps the energy counters running the whole time and not just of a measurement interval. It covers all RAPL domains (PKG, DRAM, PP0, PP1, ...). Depending whether the domain is per socket, per L3 segment or per core, metrics are read and send.
{
"likwidenergy" : {
"liblikwid_path" : "/path/to/liblikwid.so",
"accessdaemon_path" : "/folder/that/contains/likwid-accessD",
"access_mode" : "direct or accessdaemon",
"send_difference": true,
"send_absolute": true
}
}
The first three entries (liblikwid_path, accessdaemon_path and access_mode) are required to set up the access to the RAPL counters. The access_mode = perf_event is not supported at the moment.
With send_differences the difference to the last measurement is provided to the system. With send_absolute, the absolute value since start of the system is submitted as metric. It reads the counter at initialization and then updates the value after each measurement.