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On 06/30/12 21:03, Ben Kamen wrote:
<blockquote
cite="mid:mailman.17122.1341108208.1992.mythtv-users@mythtv.org"
type="cite">
<pre wrap="">top - 20:22:59 up 1 day, 2:24, 1 user, load average: 13.11, 10.50, 6.42
Tasks: 225 total, 4 running, 221 sleeping, 0 stopped, 0 zombie
Cpu0 : 51.3%us, 47.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 1.1%si, 0.0%st
Cpu1 : 10.1%us, 88.2%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 1.7%si, 0.0%st
Cpu2 : 17.4%us, 81.4%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 1.3%si, 0.0%st
Cpu3 : 24.1%us, 75.1%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.8%si, 0.0%st
Mem: 2052856k total, 1737364k used, 315492k free, 66484k buffers
Swap: 4193264k total, 0k used, 4193264k free, 899676k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
9739 root 20 0 1744m 22m 8144 S 262.8 1.1 19:19.65 <i class="moz-txt-slash"><span class="moz-txt-tag">/</span>usr/bin/mythbackend --daemon --logpath /var/log/mythtv<span class="moz-txt-tag">/</span></i> --pid
9 root 20 0 0 0 0 R 44.1 0.0 11:33.92 [ksoftirqd/1]
13 root 20 0 0 0 0 S 25.5 0.0 56:39.53 [ksoftirqd/2]
17 root 20 0 0 0 0 S 24.5 0.0 12:39.16 [ksoftirqd/3]
4 root 20 0 0 0 0 S 8.6 0.0 21:41.86 [ksoftirqd/0]
This started around 7pm CDT for me.
No drive lights going crazy, no network activity
-Ben</pre>
</blockquote>
I had the same problem on my mythbackend system - and on two other
Linux systems not running Myth. On the non-Myth systems, running
Firefox would trigger the high CPU load and show substantial time
for ksoftirqd, like above. Two of these systems are running a
Gentoo 3.2.4 kernel, and the third is running Gentoo 3.2.6. While I
cannot pinpoint the time each started exactly, it does seem to
correspond to the leap second today (1900 Central Time):<br>
<br>
Jun 30 18:59:59 somesys kernel: [1947231.441500] Clock: inserting
leap second 23:59:60 UTC<br>
<br>
A reboot was required on each to clear the problem.<br>
<br>
This smells like a kernel bug:<br>
<a href="http://comments.gmane.org/gmane.linux.kernel/1321070">http://comments.gmane.org/gmane.linux.kernel/1321070</a><br>
<br>
<a href="https://lkml.org/lkml/2012/6/30/122">https://lkml.org/lkml/2012/6/30/122</a><br>
<br>
<a
href="http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second">http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second</a><br>
<br>
<br>
Keith<br>
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