Difference between revisions of "Development"
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This is '''rsync -ar /usr/ /BOOM/deletea/''' running; | This is '''rsync -ar /usr/ /BOOM/deletea/''' running; | ||
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File:delete.svg|Delete files in sequential order|alt=Delete files in sequential order | File:delete.svg|Delete files in sequential order|alt=Delete files in sequential order | ||
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Revision as of 02:36, 18 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;
Or running bonnie++ in various stages;
Create files in sequential order
Stat files in sequential order
Delete files in sequential order
