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Programming > Assembly 370 > Re: PL/S progra...
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Re: PL/S programming language

by "John W. Kennedy" <jwkenne@[EMAIL PROTECTED] > Oct 16, 2007 at 11:30 PM

glen herrmannsfeldt wrote:
> peter.ludemann@[EMAIL PROTECTED]
 wrote:
> 
> (snip)
>>  That's how
>> they discovered that MVCL was slower than a loop of MVCs. (BTW, PL/I
>> "optimizing" compiler also used a loop of MVCs rather than MVCL.)
> 
> That has been widely known for a while now.
> 
> I believe, though, that MVCL is still faster for validating
> storage.  That is, at power up when the ECC hasn't been set
> yet you have to write whole ECC blocks.  MVCL will do that
> (assuming the right alignment) MVC might not.

But that isn't necessary. Volatile ECC is made valid on power-on, and 
non-volatile ECC is left as-is.

-- 
John W. Kennedy
"Only an idiot fights a war on two fronts.  Only the heir to the throne 
of the kingdom of idiots would fight a war on twelve fronts"
  -- J. Michael Straczynski.  "Babylon 5", "Ceremonies of Light and Dark"
 




 3 Posts in Topic:
Re: PL/S programming language
peter.ludemann@[EMAIL PRO  2007-10-13 21:16:23 
Re: PL/S programming language
glen herrmannsfeldt <g  2007-10-15 00:00:57 
Re: PL/S programming language
"John W. Kennedy&quo  2007-10-16 23:30:39 

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