QEMU performance? Post: 302930185

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Special Forums UNIX and Linux Applications Virtualization and Cloud Computing QEMU performance? Post 302930185 by sea on Wednesday 31st of December 2014 05:12:34 AM

12-31-2014

Registered User

QEMU performance?

Heyas

So, i like doing custom a LiveImage of my OS.
Using Redhats kickstart/livecd-creator method.

Anyway, so i would like to test the liveimages...
AND also, i WOULD like to install FreeBSD, Solaris, or whatever, onto a Virtual Machine.

I used to use Oracles Virtualbox, but eversince i'm booting with SecureBoot enabled, i'm no longer able to start it, so i had to change to QEMU.

Now, to just 'test' if the fresh generated iso is 'working' or not, QEMU is just fine.
But if i ever want to actualy do in QEMU, like, switching desktop, or changing the folder in pcmanfm inside QEMU, it needs patience out of this world...

I'm running my ISO's like this:

Code:

#!/bin/bash
# isotest
# Description:	Simply boots an iso file with qemu.
# ------------------------------------------------------
#
#	Variables
#
	DEFAULT_ARCH=x86_64
	DEFAULT_ARCH=$(uname -m)
	DEFAULT_RAM=$(( 4 * 1024 ))
	DEFAULT_CORES=4
	DEFAULT_VGA=vmware
	DEFAULT_FORMAT=qcow2
	DEFAULT_SIZE=5G
	DEFAULT_IMAGE_DIR=$HOME/Virtual_Machine_Images
	DEFAULT_IMAGE_FILE=isotest.img
#
#	Display & Action
#
	qemu-system-$DEFAULT_ARCH \
		-smp $DEFAULT_CORES \
		-m $DEFAULT_RAM \
		-cdrom "$1"

And to 'install' or run an intalled image i execute:

Code:

#!/bin/bash
# distrotest
# Description:	Simply boots an OS file with qemu.
# ------------------------------------------------------
#
#	Variables
#
	DEFAULT_ARCH=x86_64
	DEFAULT_ARCH=$(uname -m)
	DEFAULT_RAM=$(( 4 * 1024 ))
	DEFAULT_CORES=4
	DEFAULT_VGA=vmware
	DEFAULT_FORMAT=qcow2
	DEFAULT_SIZE=5G
	DEFAULT_IMAGE_DIR=$HOME/Virtual_Machine_Images
	DEFAULT_IMAGE_FILE=distrotest.img
#
#	Functions
#
	DEFAULT_IMAGE="$DEFAULT_IMAGE_DIR/$DEFAULT_IMAGE_FILE"
	[[ -f "$1" ]] || exit 1
	if [[ ! -f "$DEFAULT_IMAGE" ]]
	then	# We just need an image to boot an iso, this can be quite small.
		qemu-img create -f "$DEFAULT_FORMAT" "$DEFAULT_IMAGE" $DEFAULT_SIZE
	fi
#
#	Display & Action
#
	qemu-system-$DEFAULT_ARCH \
		-smp $DEFAULT_CORES \
		-m $DEFAULT_RAM \
		-cdrom "$1" \
		-hda "$DEFAULT_IMAGE"
# 		-full-screen \

As you see, i'm quite, sharing?, with my hardware for qemu...
4 Cores and 4 GB of ram, but booting an ISO (same for installed) takes up to ~7mins, when with O-VB it was as low as ~1min -- using 768mb ram and 70% of 1 core....

Doing a mouse click and wait for like 20 secs for ANYTHING to happen, is just annoying.

Any ideas or advices please?
Thank you in advance

sea

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LEARN ABOUT DEBIAN

qemuctl

qemuctl(1)																qemuctl(1)

NAME

       qemuctl - Graphical control for qemu

SYNTAX

       qemuctl [-suspend-dir <dir>] [-suspend-file <filename>] [-qemu <qemu>]  [-nowakeup] qemu-options

DESCRIPTION

       qemuctl	is a gui that controls a qemu process with the built-in monitor of qemu. So you can change devices, suspend machines, save screen-
       shots, ...

       If you suspend a machine it will do the following macro:

       stop
       screendump "suspend-dir/suspend-file.ppm"
       savevm "suspend-dir/suspend-file.vm"
       commit
       quit

       You can afterwards resume the machine with:

       qemuctl -suspend-dir suspend-dir -suspend-file suspend-file your_qemu_options
       the suspend-files will then be deleted
       or
       qemuctl -loadvm suspend-dir/suspend-file.vm your_qemu_options

       Be aware that you can't use the "-monitor" option with qemuctl, because it needs the control over the monitor. The option  "-serial  stdio"
       can't be used, too.

OPTIONS

       -suspend-file <filename>
	      This  option  is	normaly  used by qemuctl to support suspend and wakeup. qemuctl can then find the vm-state-file in its folders and
	      wakeup the virtual machine. If the file is there the qemuctl waes up the virtual machine and deletes the file afterwards. On suspend
	      the  vm-state-file is then stored as the <filename> with the .vm ending and the screenshot is stored as the <filename> with the .ppm
	      ending.
	      Default filename is "suspend".

       -suspend-dir <dir>
	      This is the dir where the suspend files would be stored or expected.
	      Default is current dir.

       -nowakeup
	      Don't wake up even if the vm-file is there. Suspend still works.
	      Default is to wake up using the vm-file if it is there.

       -qemu <qemu>
	      The qemu variation to use. It can be qemu or kvm.
	      Default is qemu.

       qemu-options
	      Use qemu-options for the launch of qemu. See qemu(1) for further details.

FILES

       none

ENVIRONMENT VARIABLES

       none

EXAMPLES

       To use the suspend file 'Debian 3.1' and store/search it in the '/qemu' dir:

       qemuctl -suspend-file "Debian 3.1" -suspend-dir "/qemu" -boot c -hda hda.raw

       Alternativly you can run it with default suspend filenames:

       qemuctl -boot c -hda hda.raw

AUTHORS

       Peter Rustler

SEE ALSO

       qemu(1) qemu-launcher(1)

Peter Rustler							       0.0.1								qemuctl(1)