Please test for-4.19/block: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/log/?h=for-4.19/block This slow boot issue should have been fixed by the following commits: 1311326cf
Hi. I'd like to resurrect previous discussion [1] regarding slow kernel boot inside QEMU with virtio-scsi disks attached and blk_mq enabled. Symptom: [ 2.830857] ata1: SATA max UDMA/133 abar address@
You have right. I am a long time user of qemu and in the past I was able to use it and it worked perfectly. I am pretty sure that I have not correctly built qemu or one if its dependencies. I don't k
Hi, I'm doing a live migration with a non shared storage on QEMY 4.2.0. Unfortunately the block migration is terribly slow and I can't find why. It does not saturate the network link and use only in
Am 14.05.2019 um 09:36:29 schrieb Michael Fritscher: Am 13.05.2019 um 23:41:25 schrieb Michael Fritscher: On 13.05.19 23:16, Jakob Bohm wrote: On 13/05/2019 16:35, Michael Fritscher wrote: Am 13.05.2
Am 13.05.2019 um 23:41:25 schrieb Michael Fritscher: On 13.05.19 23:16, Jakob Bohm wrote: On 13/05/2019 16:35, Michael Fritscher wrote: Am 13.05.2019 um 16:10:33 schrieb Michael Fritscher: Am Mont
The thing is, on VMWare I see no hpet_read calls, the most called function is reading from the network card - and I have _way_ more called syscalls on VMWare (30k on VMWare vs. 9k on qemu in 5 second
On 13/05/2019 16:35, Michael Fritscher wrote: Am 13.05.2019 um 16:10:33 schrieb Michael Fritscher: Am Montag, 13. Mai 2019 15:25 CEST, Michael Fritscher <address@hidden> schrieb: Am 13.05.2019 um
Am 13.05.2019 um 16:10:33 schrieb Michael Fritscher: Am Montag, 13. Mai 2019 15:25 CEST, Michael Fritscher <address@hidden> schrieb: Am 13.05.2019 um 10:32:48 schrieb Michael Fritscher: Good day, Sce
Am 13.05.2019 um 10:32:48 schrieb Michael Fritscher: Good day, Scenario: Host: Windows 7 and 10 64 bit, Skylake+ CPUs Qemu Version: 3.1 (4.0 isn't available yet on https://qemu.weilnetz.de/) Accelera
Am 09.09.2013 um 10:47 hat xuanmao_001 geschrieben: I sent them to you on Friday, the first email has the following subject line: [PATCH 0/2] qcow2: Discard VM state in active L1 after creating snaps
I sent patches that should eliminate the difference between the first where I can find the patches that can eliminate the difference between the first and second snapshot ? Does they fit qemu-kvm
Good day, Scenario: Host: Windows 7 and 10 64 bit, Skylake+ CPUs Qemu Version: 3.1 (4.0 isn't available yet on https://qemu.weilnetz.de/) Accelerators: HAXM and WHPX Guest: Ubuntu 18.04.2 64 bit, min
I’m having a difficult time with windows 7 on my kvm/libvirt/qemu host. Booting from the ISO, the “Starting Windows” animation is very slow and it takes hours to reach the installation. The act
Juan, any specific reason for using 32k? I think it would be better to have a multiple of the qcow2 cluster size, otherwise we get COW for the empty part of newly allocated clusters. If we can't mak
Hi. i want to emulate a slow 4core computer and install xp in it and i need to use internet in that. which commadn i must write. thank. cpu help show: x86 phenom AMD Phenom(tm)
Hi all: I have try the qemu release from 0.9 to 0.14 and feel that they are so slow that I can not tolerant, though I made the kqemu module worked together. Compare to the virtualbox the qem
Hi folks! I'm trying to set up a Windows 7 VM ( alternatively XP ). Everything works fine except of the hard drive access, it's very slow. It doesn't matter if i use the virtio drivers or not. The R/
I have 100gb raw image with only 7gb used data in it: $ qemu-img info from.img image: from.img file format: raw virtual size: 100G (107374182400 bytes) disk size: 100G $ virt-df -h from.img Filesyste
I am running Windwos 10 host and latest qemu. I have tried to run with and without the -accel whpx flags. operation is the same SLOW. even though it ways windows acceleration enabled. Is there an
Hi. https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/log/?h=for-4.19/block This slow boot issue should have been fixed by the following commits: 1311326cf475 blk-mq: avoid to syn
Hi, I have installed qemu on my windows 10 (x64) and I am able to run qemu-system-x86_64 command. Problem is that it is very slow! And when I want to install an Ubuntu as a guest, I have to wait many
Hi! When testing AddressSanitizer tool for AArch64 under qemu-aarch64 (user mode), I found out that even trivial helloworld apps start extremely slow (~2 seconds). I've investigated this a bit and no
I've encountered slow IO (~25MB/s reading from a 100MB file) with both a MIPS and an i386 qemu vm, on an x86_64 host. The system generally sits at around 30% CPU during this operation (dd if=/bigfile
This is just a burp of frustration, after years of running qemu+kvm. I am currently running qemu-system version 2.1.0 (Debian package 2.1+dfsg-2~bpo70+2), and after several years of ongoing bug repor
Have you verified that the kernel module for KVM is installed? $ lsmod | grep -i kvm IIRC should show "kvm-hv" or "kvm-pr" If you see nothing, then become root and do this: or --BEGIN PGP SIGNATURE--
Hello, I am using qemu-2.1.0 on a Slackware 14.1 operating system (with Linux 3.15.8). I run qemu like this: $ qemu-img create /tmp/qemu-img 5G $ sudo qemu-system-i386 -boot order=d -hda /tmp/qemu-im
Why are you using e1000 and not virtio? The virtio drives have significantly better performance.... Ubuntu should also have native support for them. On 8/17/2014 10:34 PM, JHM wrote: Salutations to
No, Julio is correct. The KVM functionality was all merged into upstream QEMU, and the separate qemu-kvm project is now dead. If your qemu-kvm binary is not just a wrapper script that runs qemu then
Unless someone says differently, I believe that doesn't change the likely fact that the main KVM is different than what you are doing and would perform much better. Tony
Salutations to all members, first off. This is my first post in the discussion group. I searched for this topic, but not much turned up from the archive here. Searching for "slow" http://lists.nongnu
Am 06.09.2013 um 03:31 hat xuanmao_001 geschrieben: I sent patches that should eliminate the difference between the first and second snapshot at least. cache=unsafe ignores any flush requests. It's p
Hi, qemuers: I found that the guest disk file cache mode will affect to the time of savevm. the cache 'writeback' too slow. but the cache 'unsafe' is as fast as it can, less than 10 seconds. here is
Just wanted to capture this... I have a QEMU host running a mix of Linux and Windows virtual machines. The Windows Server 2008 R2 virtual machines had became very slow to print. It was taking up to 2
As I mentioned before I'm not run 'qemu-img convert' explicitly It runs internally by virt-sparsify Moreover, virt-sparsify output says that in zeroes image: guestfsd: <= zero_free_space (0x137) requ
Some type of fsck (or nowadays possibly "trim") can zero all unused sectors of the image, before conversion? I use zerofree, or simply dd if=/dev/zero of=/tmp/zero.zero bs=4096;sync;sync;sync;rm -fv
If the filesystem has been used for a while, there may be many "deleted" sectors which are not zeroed? Some type of fsck (or nowadays possibly "trim") can zero all unused sectors of the image, before
Hello. I use KVM+qemu+virt and create VM with virt-manager. I was buying an HP Proliant ML-150G6 server (1 Xeon E5540 2.53GHz processor, 21Gb RAM, 2 250Gb SATA hard disks) and installed Oracle Linu
Hello, First of all bravo Qemu has progressed and I have lots of questions. Configuration : DELL precision 690 model name : Intel(R) Xeon(R) CPU X5355 @ 2.66GHz *2 MemTotal: 64571604 kB root@jonas:/p
I am a novice using qemu to run LUbuntu in a Mac osx host. I used this guide https://graspingtech.com/ubuntu-desktop-18.04-virtual-machine-macos-qemu/ Using this I can run the LUbuntu VM. However, if
I think what they're observing, and I may be wrong, is that either their desktop environment, or Qemu, or their OS, is de-prioritizing Qemu when it loses foreground focus, and causing it to see timer
I am a novice like yourself ... Can it be that the guest OS is going to "hibernate" or "suspend" or so automatically after a defined period of inactivity and you just misinterpret this as kvm/qemu be
I am a novice using qemu to run LUbuntu in a Mac osx host. I used this guide https://graspingtech.com/ubuntu-desktop-18.04-virtual-machine-macos-qemu/ Using this I can run the LUbuntu VM. However, if
Hi all: I have written a Bash script to stop and back up my libvirt/KVM/QEMU virtual machine every night: https://github.com/rdiez/Tools/blob/master/VirtualMachineManager/BackupVm.sh There are ways t
kvm won't work on a Windows host. -- Ottavio Caruso A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most a
2018-07-31 13:35, utdilya rašė: Thank you. This is solution not working for me. Maybe, because of Centos7. I have in the log: 3707 : host doesn't support hyperv 'relaxed' feature 3707 : host doesn'
Thank you. This is solution not working for me. Maybe, because of Centos7. I have in the log: 3707 : host doesn't support hyperv 'relaxed' feature 3707 : host doesn't support hyperv 'vapic' feature 3
Hello. I have this problem too, on Centos7 with qemu.kvm on the 4 different machines. Tell me please, do you have resolved this problem? My windows 10 after upgrades to 1803 has too much interrupts m
Hello. I have this problem too, on Centos7 with qemu.kvm on the 4 different machines. Tell me please, do you have resolved this problem? My windows 10 after upgrades to 1803 has too much interrupts m
Bisect led me to this commit, merged in 4.16: scsi: virtio_scsi: fix IO hang caused by automatic irq vector affinity Since commit 84676c1f21e8ff5 ("genirq/affinity: assign vectors to all possible CPU
While there is no delay with stable 4.7.15 kernel, there is a delay less than 8 seconds with ubuntu ppa kernel 4.7.15 on amd64. Perhaps this is related to kernel config file, as I used "make defconfi
Hi Chris, I did not observe any delay with stable 4.17.5 on ubuntu 18.04 (I built the kernel myself with CONFIG_SCSI_VIRTIO=y): file=/home/zhang/img/ubuntu1804.qcow2,format=qcow2,if=none,id=virt1 -de
Interesting. I just tried kernel 4.17.5 from the mainline ppa on Ubuntu 18.04 and now there is a delay. It's only 7.5 seconds but still noticeable. There was previously no delay with the 4.15 kernel.
I'm getting a 15 second delay on every VM boot when using the ArchLinux kernel and using the virtio-scsi-pci system. QEMU emulator version 2.12.0 running on Arch Linux (4.17.4 kernel), booting the sa
Hi to all, I'm new in this ML. After upgrading some VM from Windows 10 1709 to Windows 10 1803, the VMs runs slower. And when VM is almost idle, host CPU load is quite high. It happens on 4 different
I mean *guest* pages. We need to detect self-modifying guest code, and the guest could do that for any page in its virtual address space. thanks -- PMM
Peter, thank you for your answer. 2) In QEMU, page_set_flags is called for these ranges. It cuts given range to individual pages and sets flags for them. Given the page size is 4 Kb, for 8 Gb range w
(CCing qemu-devel, which is more likely to get developer attention) Mmm, the algorithm here is pretty simple and basically assumes the guest isn't going to be doing enormous allocations like that. (I
Does your CPU support hardware virtualization? If yes, then try adding --enable-kvm (assuming your host OS is linux and has the KVM module). On Mon, May 26, 2014 at 8:31 PM, Швецов Михаил
List: I am currently trying to figure out how to map coalesced guest virtual address (gva) space onto host virtual address (hva) space. One of my thoughts is to allocate memory, then assign them as f
Hi, when I run qemu remotely using -nographic option, the emulation becomes surprisingly slower than using graphic mode. I am very confused because the emulation speed should have nothing to do with
Proposed alternative implementation techniques: A. Check if the block count returned by stat is less than what the apparent file size (elsewhere in the stat structure) suggests. B. When converting fr
qemu-img measure checks that allocation status of blocks. As Nir said, if the file system (older NFS versions) doesn't support that then it doesn't know about zero blocks. It would be possible to ad
The softmmu version will also go through memset, usually. See mem = probe_write(env, vaddr, blocklen, mmu_idx, ra); where we only take the slow path if we can't resolve the virtual address to RAM (an
I just tried testing the patch. Initially, it seemed to work fine (log messages below). However, I am getting hard lockup of the host machine shortly after the vfio_region_setup related log lines pri
Hi Andrew, Would it be possible for you to test the patch below? I'd be happy to add Reported-by and Tested-by credits to the patch if you can provide your real name (and preferred email if other tha
On 24/03/2024 19.45, Luca Vajen wrote: Hello, I'm not sure if this is the right place to ask for help. I guess in the worst case you might get a laugh out of this. There's an old game I would like to
What is exactly what it runs slow? Operating system? Guest (virtualized) system? Qemu installation? El 29/1/23 a les 6:09, Mallikarjuna G M ha escrit: Hi Sir/Madam, Myself is Mallikarjuna, i am new t
Hello I have a mystery I haven't been able to run down and would appreciate any explanation or advice. On a mac/intel I am running qemu-system-x86_64 on a simple image which bootstraps into 64 bit lo
QCOW3 is qcow2 v3. There is a version field in the format, but for some reason it is not exposed in qemu-img info. You can inspect the headers with this minimal qcow2 parser: https://github.com/nirs/
Dear Nir/Friends, I read here [1] there was a qcow3, but it seems that page is deprecated (last update on sept. 2016) I see! Now I get it I mean, by reducing the size of a qcow image and distribute t
Have you considered repurposing whatever plugin interface is used for x86 I/O port space? (By defining it for each architecture without a predefined mapping to PCI bus I/O port space). On 2020-12-0
... Nope, nor for most any other out-of-line memory operation performed by any other qemu target. Starting with arm's own dc zva. The plugin interface needs extension for this. How should I signal th
It would be possible to add a slow loop that reads the entire input image but I'm not sure how useful it would be to read many gigabytes of data from the disk. The process would be slow and degrade p
These are the patches (in review) implementing this in imageio client: - https://gerrit.ovirt.org/c/109847 - https://gerrit.ovirt.org/c/109848 And this is example script for the engine SDK: https://g
Note that trying to run: * a modern-ish graphical OS like Windows * using pure emulation (since it's x86-on-arm, not x86-on-x86) * on a fairly slow host CPU like the Raspberry Pi series is pro
Note that trying to run: * a modern-ish graphical OS like Windows * using pure emulation (since it's x86-on-arm, not x86-on-x86) * on a fairly slow host CPU like the Raspberry Pi series is pro
Note that trying to run: * a modern-ish graphical OS like Windows * using pure emulation (since it's x86-on-arm, not x86-on-x86) * on a fairly slow host CPU like the Raspberry Pi series is probably g
Hi, Played with system emulation a while back. I doubt this is used much in practice. It's very slow for various reasons (no gic, no armv8 arch updates to support kvm virt better, slow sdcard/usb I/O
I did the original work using AFL to fuzz qemu-img and find problematic images. From that work Dan & I suggested some fairly low limits (10 seconds IIRC). See: https://bugs.launchpad.net/qemu/+bug/14
I removed the commit that caused the icount related error and continued to run. What I'm observing is that I have modified the serial.c file to have a timer to set a delay between transmit of charact
Thank you, I try that. As i ma new to building qemu, I had strictly followed the wiki... Am 27.09.2017 um 22:49 schrieb Pierre Couderc: I have compiled and built from git qemu tag 2.10.0 (./configure
that all software debug builds are by default extremely slow, try a release build Am 27.09.2017 um 22:49 schrieb Pierre Couderc: I have compiled and built from git qemu tag 2.10.0 (./configure --targ
Ah, overall bad news for me, as I now have absolutely no clue what's causing my USB performance/reliability issues in the VM :( Nonetheless, here is the new log output: address@hidden:vfio_region_set