Experiments
Platform:
- Personal computer, TBPM in Linux kernel, Redhat 6.0
- To control power states of HD and network transmitter ( wireless)
- Modify kernel and device drivers of PC with xWindow and NW, configured as a client, server daemons (http server, internet news server) are turned off, cron tasks are scheduled at low frequencies. Power state changes in an HD and NIC are emulated with two states: working & sleeping
- To compare with other PM policies, power state changes were emulated without actually setting the hardware power state. By maintaining a set of variables, record was maintained on device statistics – number of shutdown and wake up by various policies.
- See tables 1 for hardware parameters