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# Faultstat
Faultstat reports the page fault activity of processes
running on a system. The tool supports a 'top' like mode
to dynamically display the top page faulting processes.
Faultstat command line options:
* -a how page fault size changes with up arrow when they increment
* -c get command information from processes comm field
* -d strip directory basename off command information
* -h show help
* -l show long (full) command information
* -p proclist specify a comma separated list of processes to monitor; the process list may contain one or more PIDs or process names
* -s show short command information
* -t top mode, show top page faulting processes by current page fault changes
* -T top mode, show top page faulting processes by total page faults
# Faultstat top mode hotkeys:
* a Toggle page fault change arrow on or off
* s Switch sorting order: Major and Minor, Major, Minor, +Major and +Minor, +Major, +Minor, Swap
* t Toggle between total page fault count and page fault changes
* q Quit
# Example:
show page faults that occur during 60 seconds:
```
sudo faultstat 60 1
Change in page faults (average per second):
PID Major Minor +Major +Minor Swap User Command
7099 2711 4351k 0 290975 0 cking /usr/lib/thunderbird/thunderbird
7577 32633 2272k 16 55316 0 cking /usr/lib/firefox/firefox
7802 22038 972061 8 62877 0 cking /usr/lib/firefox/firefox
6097 57 143886 2 787 0 cking /usr/bin/gnome-shell
7681 2767 131395 0 352 0 cking /usr/lib/firefox/firefox
9044 111 115413 0 85 0 cking /usr/lib/firefox/firefox
5954 219 66363 9 306 0 cking /usr/lib/xorg/Xorg
707 25244 3011 77 6 0 root /lib/systemd/systemd-journald
8180 6610 16036 0 2 0 cking /snap/mumble/1675/bin/mumble
7536 345 17293 0 88 0 cking /usr/libexec/gnome-terminal-server
7733 12 12475 0 2 0 cking /usr/lib/firefox/firefox
7308 55 9274 0 1 0 cking /usr/lib/thunderbird/thunderbird
10412 0 191 0 16 0 root faultstat
Total: 92802 8109k 112 410813
```
show Major/Minor faults and change in Major/Minor faults (+Major +Minor fields):
```
faultstat -T
```
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