Libguestfs - Apr 2020 - Can I use guestfish to benchmark qemu performance?

I come across this page libguestfs.org/guestfs-performance.1.html
<http://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.

On Thu, Apr 02, 2020 at 11:27:57PM +0200, chl501@tutanota.com
wrote:
> I come across this page libguestfs.org/guestfs-performance.1.html
<http://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?)
Yes, see:

https://github.com/libguestfs/libguestfs-analysis-tools

and my various postings on performance in 2016:

https://rwmj.wordpress.com/2016/03/
https://rwmj.wordpress.com/2016/05/
> 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
This is reasonable, considering that debugging is enabled.
> 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)?
The analysis tools basically do all this.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v

Thank you for answering my questions. It's useful, many thanks!

Apr 3, 2020, 11:00 by rjones@redhat.com:
> On Thu, Apr 02, 2020 at 11:27:57PM +0200, chl501@tutanota.com wrote:
>
>> I come across this page libguestfs.org/guestfs-performance.1.html
<http://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?)
>>
>
> Yes, see:
>
> https://github.com/libguestfs/libguestfs-analysis-tools
>
> and my various postings on performance in 2016:
>
> https://rwmj.wordpress.com/2016/03/
> https://rwmj.wordpress.com/2016/05/
>
>> 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
>>
>
> This is reasonable, considering that debugging is enabled.
>
>> 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)?
>>
>
> The analysis tools basically do all this.
>
> Rich.
>
> -- 
> Richard Jones, Virtualization Group, Red Hat
http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
> virt-p2v converts physical machines to virtual machines.  Boot with a
> live CD or over the network (PXE) and turn machines into KVM guests.
> http://libguestfs.org/virt-v2v
>