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HomepcDuinokernel and ubootQuick Note – pcDuino – Changing Debug ...
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Quick Note – pcDuino – Changing Debug Levels (Revised)

Posted by: Alvin Jin , January 7, 2014

[vc_row][vc_column width=”1/1″][vc_column_text]Original: http://digitalhacksblog.blogspot.com/2013/12/quick-note-pcduino-changing-debug.html

I had recently run into an issue where the rsyslogd process was chewing up about 75% of the CPU when I was using the mali driver for GLES2 support. I found out that the mali_debug_level and the ump_debug_level were set to 10. As a result there was a significant amount of messages being generated by these drivers. I changed the mali_debug_level to 2 and ump_debug_level to 2 and the high utilization and the messages went away.

Create a conf file for mali in /etc/modprobe.d with one line in it.
cat > /etc/modprobe.d/mali.conf
options mali mali_debug_level=2
^D

Create a conf file for ump in /etc/modprobe.d with one line in it.
cat > /etc/modprobe.d/ump.conf
options ump ump_debug_level=2
^D

I believe this will still get you critical and error messages.
Related commands:

  • To list settable options for a module use: modinfo <module>
  • If module isn’t loaded you can do modprobe <module> [<parameter>=<value>]
  • To determine active value look in /sys/module/<module>/parameters

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Tags: kernel and uboot

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