Tools_Linux_OS_CPU_Disk_Network.md

Linux tools for OS metrics/performance measurements

• A list of Linux tools and diagnostic utilities for OS-based investigations

• Measure CPU used by the JVM:

  • $ ps -efo cputime -p <pid_Spark_JVM>
  • Get the metrics directly from /proc/<pid>/stat or /proc/<pid>/status

• Find process PID for JVM applications (e.g. Spark): jps | grep SparkSubmit # use this to find pid_Spark_JVM

• Monitor system usage per process with pidstat

  • pidstat 3 10 # measure all processes
  • pidstat -T ALL -p <pid> 10 10 # measure threads of a given pid

• system-wide tools

  • vmstat 3 10
  • mpstat -P ALL 3 10
  • sar 3 10
  • top
  • htop
  • atop
  • dstat

• tiptop

  • measures CPU metrics, including IPC, can be run with -p option

• Measure I/O per pid

  • pidstat -d -T ALL -p <pid> 3 10 # measure also I/O
  • iotop -p <pid> 3 10

• Measure I/O

  • sar -d 3 10
  • iostat -xc 3 10

• Network

  • sar -n DEV 3 10
  • nethogs # per-process metrics
  • iftop # per-process metrics

• Config info

  • dmidecode
  • /proc/cpuinfo, /proc/meminfo
  • cpupower frequency-info
  • turbostat --debug
  • lspci, lscpu, lsscsi, lsblk

• Tracing, monitoring, debugging

  • strace -f -p <pid>
  • JVM jtools: jstack <pid>, jmap, jvisualvm, jdb, jconsole
  • gdb

• Dynamic tracing and tool kits

  • perf-tools https://github.com/brendangregg/perf-tools
    • cachestat, iosnoop, ..., https://github.com/brendangregg/perf-tools/tree/master/bin
    • funccount -d 5 'sys_read'
    • bin/syscount -cp
  • perf http://www.brendangregg.com/perf.html
  • BPF-based performance tools
    • bcc-tools: https://github.com/iovisor/bcc and https://github.com/iovisor/bcc/tree/master/tools
    • bpftrace: https://github.com/iovisor/bpftrace
    • see also https://github.com/goldshtn/linux-tracing-workshop
  • Ftrace

• Misc

  • https://github.com/LucaCanali/Linux_tracing_scripts