[2.4] Are jiffies in jiffies?

[2.4] Are jiffies in jiffies?

[Ihar 'Philips' Filipau]

Hello!

   [ I beleive this is real FAQ - so responding with private e-mails 
more appropriate.
     ptr("RTFM") != 0 are welcome. ]

   jiffies declared in kernel/timer.c.
   Name suggests that it is incremented 100 times per second.
   LDD2 suggests that it is incremented every 1000/HZ per second.

   Is it just name misleading - or I really miss the point?

   So to translate this to seconds i need (jiffies*1000/HZ)
   and milliseconds are just (jiffies/HZ) then.

   Am I right?
   I need this for {add,mod}_timer() calls.

-- 
Ihar 'Philips' Filipau  / with best regards from Saarbruecken.
--                                                           _ _ _
  "... and for $64000 question, could you get yourself       |_|*|_|
    vaguely familiar with the notion of on-topic posting?"   |_|_|*|
                                 -- Al Viro @ LKML           |*|*|*|

Re: [2.4] Are jiffies in jiffies?

[Tomas Telensky]

> Hello!
>
>   [ I beleive this is real FAQ - so responding with private e-mails
> more appropriate.
>     ptr("RTFM") != 0 are welcome. ]
>
>   jiffies declared in kernel/timer.c.
>   Name suggests that it is incremented 100 times per second.
>   LDD2 suggests that it is incremented every 1000/HZ per second.
>
>   Is it just name misleading - or I really miss the point?
>
>   So to translate this to seconds i need (jiffies*1000/HZ)
>   and milliseconds are just (jiffies/HZ) then.

No. seconds are jiffies/HZ.
HZ = Herz = something per second :-)
HZ = something / second => second = something / HZ :-)

        Tomas

Re: [2.4] Are jiffies in jiffies?

[Bernd Petrovitsch]

On Die, 2003-11-04 at 13:52, Tomas Telensky wrote:
> HZ = Herz = something per second :-)
<nitpick>
It is "Hertz".
</nitpick>

	Bernd
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