Hi All I am seeing this problem at the very early in the start_kernel--> mm_init--> free_highpages, at that time nothing is up and kernel is running in single thread.
Thanks Sandeep On Tue, Jan 22, 2013 at 1:07 AM, hejianet <[email protected]>wrote: > how about to check the disable/enable timer interrupt? > cat /proc/stat before/after 2 seconds? > On 2013-01-22 13:51, sandeep kumar 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 > > 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? > > > > Please clarify... > > > > > > > > > > _______________________________________________ > > Kernelnewbies mailing list > > [email protected] > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > -- With regards, Sandeep Kumar Anantapalli,
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