I wonder if you switch event mode to poll mode, does this problem still remain?

John Martin wrote:
> 
> On 04/ 5/11 08:17 AM, Li, Aubrey wrote:
> > Hi, any update of this issue?  thanks, -Aubrey
> 
> No update.  The xcalls/speedstep_pstate_transition issue is still there
> in b162.  This is with an Intel i7 980X.  Someone else has reported
> a similar issue with an AMD CPU.
> 
> I don't believe the problem is directly associated with user processes.
> If I kill a process listed in the powertop output, the xcall/pstate
> just get assigned to another user process.
> 
>                                       OpenSolaris PowerTOP version 1.2
> 
> C-states (idle power) Avg     Residency                       P-states 
> (frequencies)
> C0 (cpu       running)                (15.4%)                         1596 
> Mhz        74.0%
> C1                    1.7ms   (39.0%)                         1729 Mhz        
> 0.0%
> C2                    0.0ms   (0.0%)                          1862 Mhz        
> 0.0%
> C3                    0.0ms   (45.6%)                         1995 Mhz        
> 0.0%
> 
> 2128
> Mhz   0.0%
> 
> 2261
> Mhz   0.0%
> 
> 2394
> Mhz   0.0%
> 
> 2527
> Mhz   0.0%
> 
> 2660
> Mhz   0.0%
> 
> 2793
> Mhz   0.0%
> 
> 2926
> Mhz   0.0%
> 
> 3059
> Mhz   0.0%
> 
> 3192
> Mhz   0.0%
> 
> 3325
> Mhz   0.0%
> 
> 3428
> Mhz(turbo)    26.0%
> 
> Wakeups-from-idle per second: 163953.4  interval: 5.0s
> no ACPI       power usage estimate available
> 
> Top causes for wakeups:
> 22.4% (36683.0)                sched :        <xcalls> unix`dtrace_xcall_func
>   0.7% (1182.2)                       java :  <xcalls>
> unix`speedstep_pstate_transition
>   0.7% (1179.4)                 sched :       <xcalls>
> unix`speedstep_pstate_transition
>   0.4% (609.6)               <kernel> :       genunix`clock
>   0.4% (582.0)               <kernel> :       genunix`cv_wakeup
>   0.2% (305.0)               <kernel> :       SDC`sysdc_update
>   0.1% (229.5)               <kernel> :       genunix`lwp_timer_timeout
>   0.1% (164.1)        thunderbird-bin :       <xcalls>
> unix`speedstep_pstate_transition
>   0.1% (140.7)               <kernel> :
> uhci`uhci_handle_root_hub_status_change
>   0.1% (      90.0)                   Xorg :  <xcalls>
> unix`speedstep_pstate_transition
>   0.0% (      79.0)            <interrupt> :  ahci#0
>   0.0% (      74.1)               <kernel> :  cpudrv`cpudrv_monitor_disp
>   0.0% (      62.3)            zpool-rpool :  <xcalls>
> unix`speedstep_pstate_transition
>   0.0% (      52.3)            <interrupt> :  ehci#0
>   0.0% (      46.9)               <kernel> :
> ehci`ehci_handle_root_hub_status_change
>   0.0% (      36.5)               <kernel> :  uhci`uhci_cmd_timeout_hdlr
>   0.0% (      26.3)                fsflush :  <xcalls>
> unix`speedstep_pstate_transition
>   0.0% (      24.4)               <kernel> :  genunix`schedpaging
>   0.0% (      24.2)               metacity :  <xcalls>
> unix`speedstep_pstate_transition
>   0.0% (      19.8)           zpool-myhome :  <xcalls>
> unix`speedstep_pstate_transition
>   0.0% (      15.4)         gnome-terminal :  <xcalls>
> unix`speedstep_pstate_transition
>   0.0% (      10.4)                  sched :  <xcalls>
> unix`hati_demap_func
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