bcc
notes
- python tools usually under usr/share/bcc/tools
- zfs latency with
zfsslower and zfsdist
- system cache every 5000th cache call for 20 sec
llcstat -c 5000 20
- profile
profile -df -p 6969 10 > flamegraph.profile
- ugc profile python/node/ruby/jvm gc
ugc -l python -m $PID
- ustat profile python/node/ruby/jvm events every 5 sec
ustat -l python -C 5
- ucalls profile latency/call counts python/node/ruby/jvm pids every 5 secs
ucalls -l python -m -L -S 5
- trace
trace 'sys_execve "%s", arg1'
- filetop
filetop -C
- random disk pattern print every second
biopattern 1
- disk io
biotop
- disk latency
biolatency -m -T 5
- dddos.py primitive ddos detection