Hi,
I have a kernel thread which needs to be
woke-up every 50 mili seconds (un-conditionaly) to be used as
a periodic timer
The kernel version I am using is 2.4.18
.
I have made a small research and found 2
possibilities:
schedule_timeout
interruptible_sleep_on_timeout.
I made some experiements with both of them , and
under a medium load (24Mbit) , it seems that
the interruptible is more accurate. The schedule
has deviation of several miliseconds every
50/100 samples (I totally took a batch of 150
samples - each sample is a 50 mili interval ).
The interruptible_sleep, has also that deviation
, but less frequent (once per batch), and the overall
picture shows that it is more
accurate.
On the other hand, I have read that the
interruptible_sleep is less stable and gets into race conditions.
The question is : Did everyone tried to work with
both of those APIs? If the interruptible_sleep is called unconditionaly , does
it still un-recommended for use ?
I appreciate any info
Chava
