<div dir="ltr">Hi All<div style>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.</div><div style><br></div>
<div style>Thanks</div><div style>Sandeep</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Jan 22, 2013 at 1:07 AM, hejianet <span dir="ltr"><<a href="mailto:hejianet@linux.vnet.ibm.com" target="_blank">hejianet@linux.vnet.ibm.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">how about to check the disable/enable timer interrupt?<br>
cat /proc/stat before/after 2 seconds?<br>
<div class="HOEnZb"><div class="h5">On 2013-01-22 13:51, sandeep kumar wrote:<br>
> Hi all<br>
> As far as I know jiffie counter is incremented HZ times/second. And it is<br>
> used to measure the time lapses in the kernel code.<br>
><br>
> I m seeing a case where, actualy time spent in some module using giffies is<br>
> zero, but while seeing UART logs i am seein 2 sec time difference. I dont<br>
> know how to interpret this. The case which i am seeing, hrtimers are not<br>
> enabled yet, so only thing i can rely are on jiffies.<br>
><br>
> My question here is,<br>
> Is it possible that the measured time lapse shown is "0"(jiffie count is<br>
> same before and after), but actually some time is spent?(say some 2 sec)<br>
><br>
> In another way..can jiffies may freeze for some time?<br>
><br>
> Please clarify...<br>
><br>
><br>
><br>
><br>
</div></div><div class="HOEnZb"><div class="h5">> _______________________________________________<br>
> Kernelnewbies mailing list<br>
> <a href="mailto:Kernelnewbies@kernelnewbies.org">Kernelnewbies@kernelnewbies.org</a><br>
> <a href="http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies" target="_blank">http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies</a><br>
<br>
<br>
<br>
_______________________________________________<br>
Kernelnewbies mailing list<br>
<a href="mailto:Kernelnewbies@kernelnewbies.org">Kernelnewbies@kernelnewbies.org</a><br>
<a href="http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies" target="_blank">http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies</a><br>
</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br>With regards,<br>Sandeep Kumar Anantapalli,<br>
</div>