> From: Neil Perrin [mailto:neil.per...@oracle.com]
>
> The size of these structures will vary according to the release you're
running.
> You can always find out the size for a particular system using ::sizeof
within
> mdb. For example, as super user :
> 
> : xvm-4200m2-02 ; echo ::sizeof ddt_entry_t | mdb -k
> sizeof (ddt_entry_t) = 0x178
> : xvm-4200m2-02 ; echo ::sizeof arc_buf_hdr_t | mdb -k
> sizeof (arc_buf_hdr_t) = 0x100
> : xvm-4200m2-02 ;

I can do the echo | mdb -k.  But what is that : xvm-4200 command?  

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