I come across this page libguestfs.org/guestfs-performance.1.html This raises my interest. I am currently learning how to benchmark performance qemu. So here is my questions:

1. Can I use guestfish or any tools provided by libguestfs to benchmark qemu? How? (The command I use below is correct or what's the correct command to execute it?)

The preliminarily run I use is "time guestfish --ro -a disk.img -i exit run -v -x" and its output on console wrt the time are

real 0m3.713s

user 0m1.968s

sys 0m0.741s

There many output with -v -x params enabled

...

guestfsd: => internal_autosync (0x11a) took 0.05 secs

libguestfs: trace: internal_autosync = 0

libguestfs: sending SIGTERM to process 11629

libguestfs: qemu maxrss 235720K

libguestfs: trace: shutdown = 0

libguestfs: trace: close

libguestfs: closing guestfs handle 0x562ae3df6c10 (state 0)

libguestfs: command: run: rm

libguestfs: command: run: \ -rf /tmp/libguestfsIDYj9s

libguestfs: command: run: rm

libguestfs: command: run: \ -rf /run/user/1000/libguestfs2SKM4c

2. If the tool such as guestfish (or any other tools provided by libguestfs) can be used to benchmark qemu's performance, is it possible to identify the execution time spent on different processes e.g. init? How?

3. How do I interpret the output with -v -x for the command guestfish (like the command being executed below)?

Thanks for help.