Difference between revisions of "Development"

Revision as of 10:47, 20 March 2014

Development

Huge thanks to BrendanGregg for so much of the dtrace magic.

dtrace the kernel while running a command:

dtrace -x stackframes=100 -n 'profile-997 /arg0/ {
   @[stack()] = count(); } tick-60s { exit(0); }' -o out.stacks

it will run for 60 seconds.

Convert it to a flamegraph

./stackcollapse.pl out.stacks > out.folded
./flamegraph.pl out.folded > out.svg

This is rsync -ar /usr/ /BOOM/deletea/ running;

rsync flamegraph

Or running bonnie++ in various stages;

• 

  Create files in sequential order

• 

  Stat files in sequential order

• 

  Delete files in sequential order