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Re: Wait for two clock ticks

To: Raz <raziebe@xxxxxxxxx>
Subject: Re: Wait for two clock ticks
From: Greg Freemyer <greg.freemyer@xxxxxxxxx>
Date: Fri, 6 Mar 2009 16:10:41 -0500
Cc: Asim <linkasim@xxxxxxxxx>, kernelnewbies@xxxxxxxxxxxx
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On Fri, Mar 6, 2009 at 1:34 PM, Raz <raziebe@xxxxxxxxx> wrote:
> On Fri, Mar 6, 2009 at 8:17 PM, Asim <linkasim@xxxxxxxxx> wrote:
>> I need it for a device. The device performs some operation in a loop
>> but I cannot wait in that loop forever, so I need to wait for the
>> maximum time I can (2 clock ticks) before giving up on the device.
>> Interrupts may be disabled so I cannot use jiffies. Any simple
>> solution would be appreciated.
> so why not use getnstimeofday ?
>

Or better yet, why not use some kind of lock to protect your shared
resource but allow the cpu do other work.  Disabling interrupts for 2
ticks is just not desired.  If you did that you could easily look at
jiffies.

Greg
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References:
- Wait for two clock ticks
  - From: Asim
- Re: Wait for two clock ticks
  - From: Henrik Austad
- Re: Wait for two clock ticks
  - From: Asim
- Re: Wait for two clock ticks
  - From: Greg Freemyer
- Re: Wait for two clock ticks
  - From: Raz
- Re: Wait for two clock ticks
  - From: Asim
- Re: Wait for two clock ticks
  - From: Raz

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