On Tue, Jan 22, 2013 at 11:21 AM, sandeep kumar <coolsandyforyou@xxxxxxxxx> wrote: > Hi all > As far as I know jiffie counter is incremented HZ times/second. And it is > used to measure the time lapses in the kernel code. > > I m seeing a case where, actualy time spent in some module using giffies is > zero, but while seeing UART logs i am seein 2 sec time difference. I dont Please post the code here regarding how did you find out it is zero. > know how to interpret this. The case which i am seeing, hrtimers are not > enabled yet, so only thing i can rely are on jiffies. > > My question here is, > Is it possible that the measured time lapse shown is "0"(jiffie count is > same before and after), but actually some time is spent?(say some 2 sec) > > In another way..can jiffies may freeze for some time? Is your watchdog enabled?If it is then you will see panic happening i.e. soft lockup. > > Please clarify... > > > -- > With regards, > Sandeep Kumar Anantapalli, > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
