Hi Srivatsa, 

on LKML I did see your patch trying to increase the accuracy of tme pmtmr by 
directly converting the PM-timer-ticks to jiffies. I think this is a good 
idea but as you already recognized, it is not completely correct...

There are at least these issues:
1. "offset_last" corresponds to the time when the last recognized
   jiffyoccoured. So "delta" always corresponds to the time from the last
   recognized jiffy to _now_. "monotonic_base" is increased by delta, so after
   the first run it will correspond to _now_. But the next time the
   offset-time between the last recognized jiffy and the last _now_ is added
   _again_. So the monotonic clock ist too fast...
2. "offset_last is modified outside the "monotonic_lock", what is not allowed.

I fixed these issues by using most of the old code, but simply changed "delta" 
and "offset_delay" to always contain PM-timer-ticks and compute the lost 
jiffies directly using PMTMR_TICKS_PER_JIFFY.

I tested the attached patch during the last night and it sems to work...

Best regards
  Thomas Schlichter