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Note that this allows guest direct access to the host filesystem,


  		





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so should only be used with trusted guest OS.


  		





  
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@item -icount [N|auto]


  		





  
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Enable virtual instruction counter.  The virtual cpu will execute one


  		





  
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instruction every 2^N ns of virtual time.  If @code{auto} is specified


  		





  
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then the virtual cpu speed will be automatically adjusted to keep virtual


  		





  
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time within a few seconds of real time.


  		





  
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Note that while this option can give deterministic behavior, it does not


  		





  
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provide cycle accurate emulation.  Modern CPUs contain superscalar out of


  		





  
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order cores with complex cache heirachies.  The number of instructions


  		





  
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executed often has little or no correlation with actual performance.


  		





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@end table


  		





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@c man end


  		












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