gernot@tintenfass:~# powertop -t 30 -d 1
OpenIndiana PowerTOP version 1.2   (C) 2009 Intel Corporation

Collecting data for 30.00 second(s) 
C-states (idle power)   Avg     Residency
C0 (cpu running)                (0.0%)
C1                      4.8ms   (100.0%)
P-states (frequencies)
1200 Mhz        88.9%
1800 Mhz        11.1%
Wakeups-from-idle per second: 484.2     interval: 30.0s
Top causes for wakeups:
37.9% (183.6)               sched :<xcalls> unix`dtrace_xcall_func                                 
20.7% (100.0)            <kernel> :genunix`clock                                                   
16.6% ( 80.2)            <kernel> :genunix`cv_wakeup                                               
10.3% ( 50.0)            <kernel> :SDC`sysdc_update                                                
 4.0% ( 19.3)            <kernel> :uhci`uhci_handle_root_hub_status_change                         
 2.1% ( 10.0)            <kernel> :ata`ghd_timeout                                                 
 1.6% (  7.7)            <kernel> :ehci`ehci_handle_root_hub_status_change                         
 1.0% (  5.0)            <kernel> :uhci`uhci_cmd_timeout_hdlr                                      
 0.9% (  4.3)         <interrupt> :pci-ide#0                                                       
 0.8% (  4.0)            <kernel> :genunix`schedpaging                                             
 0.4% (  2.0)            <kernel> :cpudrv`cpudrv_monitor_disp                                      
 0.3% (  1.7)            <kernel> :i915`i915_gem_retire_work_handler                               
 0.3% (  1.7)         <interrupt> :e1000g#0                                                        
 0.3% (  1.6)               intrd :<xcalls> unix`hati_demap_func                                   
 0.2% (  1.0)            <kernel> :TS`ts_update                                                    
 0.2% (  1.0)            <kernel> :e1000g`e1000g_local_timer                                       
 0.2% (  1.0)            <kernel> :genunix`clock_realtime_fire                                     
 0.2% (  1.0)         <interrupt> :uhci#0                                                          
 0.2% (  1.0)         <interrupt> :uhci#1                                                          
 0.2% (  1.0)         <interrupt> :ehci#0                                                          
 0.2% (  1.0)         <interrupt> :uhci#3                                                          
 0.2% (  1.0)         <interrupt> :uhci#2                                                          
 0.2% (  1.0)         <interrupt> :ehci#1                                                          
 0.2% (  1.0)         <interrupt> :uhci#4                                                          
 0.2% (  0.7)               sched :<xcalls> unix`hati_demap_func                                   
 0.1% (  0.6)               sched :<xcalls> unix`speedstep_pstate_transition                       
 0.1% (  0.5)            <kernel> :heci`heci_wd_timer                                              
 0.1% (  0.3)            <kernel> :kcf`rnd_handler                                                 
 0.0% (  0.2)            <kernel> :ahci`ahci_watchdog_handler                                      
 0.0% (  0.2)         zpool-rpool :<xcalls> unix`speedstep_pstate_transition                       
 0.0% (  0.1)            <kernel> :swrand`rnd_handler                                              
 0.0% (  0.1)            <kernel> :ip`igmp_slowtimo                                                
 0.0% (  0.1)            <kernel> :ip`squeue_fire                                                  
 0.0% (  0.1)            <kernel> :genunix`vmem_update                                             
 0.0% (  0.1)                smbd :<xcalls> unix`speedstep_pstate_transition                       
 0.0% (  0.1)            <kernel> :ip`tcp_timer_callback                                           
 0.0% (  0.1)            <kernel> :genunix`kmem_update                                             
 0.0% (  0.0)            <kernel> :genunix`realitexpire                                            
powertop: battery kstat not found (-1)
no ACPI power usage estimate available