Thursday, December 13, 2012

Kernel Upgrade Issues and more

This is a stub.. There are no finding.. only links that relate to how across various linux versions the context switch has slowed down. And is there anything that can be done about it:

http://blog.tsunanet.net/2010/11/how-long-does-it-take-to-make-context.html
http://stackoverflow.com/questions/12111954/context-switches-much-slower-in-new-linux-kernels

On various tweaks in Linux  basics:
http://www.redbooks.ibm.com/redpapers/pdfs/redp4285.pdf

While trying to study how linux computes memory usage in /proc/meminfo, I came across this blog link that explains the slab entry in quite a bit. Quite an introduction to how to debug a memory leak in kernel using /proc/slabinfo - http://www.rt-embedded.com/blog/archives/memory-leaks-kernel/




Saturday, December 8, 2012

And this was so forgotten.. How to find square root of a number..

http://www.wikihow.com/Calculate-a-Square-Root-by-Hand

Sometimes most obvious of teachings are so forgotten. Its humbling to go back and revise those.
Like finding square root of a number.