I have a 4-node Intel Nehalem cluster and a 512 core Intel Clovertown cluster. I am interested in looking for some tools to measure the power consumed by parallel applications. I know that we can use external devices to measure and log power consumption. I would like to know if someone around here has some experience with any particular tool-kit. I would greatly appreciate it if someone can point me in the right direction.
I am also interested in looking at hardware counters to measure the power consumption. Do the Nehalems or the Clovertowns support any low-level counters for such purposes with little performance overheads?
Thanks in advance!