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; | ||
| − | [[Media:rsyncflamegraph.svg|rsync flamegraph]] | + | [[Media:rsyncflamegraph.svg|thumb|rsync flamegraph]] |
| + | |||
| + | |||
| + | Or running '''bonnie++''' in various stages; | ||
| + | |||
| + | Create files in sequential order... | ||
| + | [[Media:create.svg|thumb|bonnie create]] | ||
| + | |||
| + | Stat files in sequential order... | ||
| + | [[Media:stat.svg|thumb|bonnie stat]] | ||
| + | |||
| + | Delete files in sequential order... | ||
| + | [[Media:delete.svg|thumb|bonnie delete]] | ||
Revision as of 02:24, 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...
