Sekhar, On our new SoC that is a using davinci architecture in kernel, we are seeing an issue in which the time stamp displayed by printk wraps around at about 25-26 seconds. We are using a timer clock frequency of 163.84MHz and uses timer64 for implementing clock event and clock source. The cat /proc/interrupts shows that the event interrupts are happening at HZ rate. Clock source max of 0xffffffff translates to about 25 secs. So when prink calls the arch specific sched_clock(), the time stamp wraps around at the max. If the weak sched_clock is used instead, then time stamp is working fine (but lower resolution). There seems to be something missing that mess up the time stamp. Have you seen this kind of behavior before and if so, what could be the potential cause for this. We are using v3.1 from upstream kernel repo.
You help will be highly appreciated. Thanks. Murali Karicheri Software Design Engineer email: [email protected] Phone: (301) 407 9583 _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
