similar to: Memory and CPU Overcommit

Hi. I want use xen with dynamic slices. For example, I have 20 domU based on FreeBSD, xen hypervisor 3.3.1, Debian Lenny dom0 system. All domUs have 80Gb LVM partitions, but realy they use 20 of this 80Gb and I want to create more domU''s. How can I do it? I know that some virtualisation have possibility to do dynamic slices(4 example Virtul box) -- Best Regards, alex.faq8@gmail.com

I have been using Xen on a daily basis on a production (but not critical) machine for a number of months now. It''s looking really good. One thing that I have not yet seen anyone mention as a feature that I would really like to see is the ability to overcommit memory. I have 2G of RAM in my machine. I would like to give a developer his own virtual domain to sandbox his application

Hi all, The xen documentation at http://wiki.xensource.com/xenwiki/CreditSchedulerstates that the max weight you can set for a domU is 65535. To verify this I decided to try setting 65535 to my dom0 which had no domUs running at the time. I was unable to set a weight of 65535. The server is a duel quad core (8 cores) with 32GB RAM running Centos 5.4/xen-3.0.3-94.el5_4.3 . The maximum weight I was

Wondering if I can get some opinions on dom0 CPU pinning and xm weighting. We have several xen servers on SLES11SP1 and up to this point we have never done anything with pinning CPU''s to dom0. We''re trying to decide if we should be doing that. Same goes for xm weighting (if I''m saying that correctly). For example, running the following command when a xen server

Hello, I am running a functional Xen 4.0 platform. The objective is the project I am currently running is to replace 4 VMWare ESX by 4 Xen 4.0 hypervisors. I have been able to reproduce all the core VMWare features in Xen (but better of course =D) except memory overcommitment. I know this feature has been included since Xen 3.3 but I have found almost no information about it. When I try to

I have a xen server setup that I want to install a lot of vms on if possible. The vms will have no utilization for the most part; and brief utilization when active. The server has 2GB of RAM. We were running into a problem were the dom0 would not let us add anymore vms because we were out of physical memory. I have started to read about memory ballooning and hoping someone could point me

Hi Everyone, What''s the parameter in the DomU config file to cap the CPU on the domain? I tried using "cap = 20". While the VM booted ok, doing a "xm sched-credit -d </domain/>" showed the cap as being 0 Any ideas? Thanks _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com

> 2016-08-18 12:39 GMT-04:00 correomm <correomm at gmail.com>: > >> This bug is reported only on the VM's with CentOS 7 running on on VMware >> ESXi 5.1. >> The vSphere performance graph shows high CPU consume and disk activity only >> on VM's with CentOS 7. Sometimes I can not connect remotely with ssh >> (timeout error). >> > I'm

My test box has an AMD dual core processor in it, giving me 2 physical cpu''s. If I overcommit the vcpu''s (eg vcpus=4) to simulate a 4 cpu machine, how accurate a simulation should it be (apart from performance sucking badly)? James _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

Hi! I`m using xen 3.0.2 on a Debian Sarge 3,1 (XEON machine)! By default my scheduler is "sedf", ok?! I would like to change it to the "credit"! I tried to set the parameter "sched=credit" in my grub config, but when I try to use the command "xm sched-credit -d <domain>" and others, it doesn`t work! But if I try "xm sched-sedf -l" it

Hi all, I''ve a linux dom0, a dom1 winxp sp2 (WinXP) and another winxp sp2 with 2 vcpu (WinXP_02) Dom2 uses all the dom0 idle: I mean this vm uses too much resources, it seems something wrong in configuration. This is strange because the other win xp uses very few resources I''ll attach some useful output.. Suggestions? (domain (domid 4) (on_crash restart) (uuid

Implements tool interfaces for scheduling domains. libxenctrl, xm, and xend. signed-off-by: Mike D. Day <ncmike@us.ibm.com> -- libxc/xc_domain.c | 85 +++++++++++++++++++++++++++++++++--- libxc/xenctrl.h | 43 ++++++++++++++++-- python/xen/xend/XendDomain.py | 78 +++++++++++++++++++++++++++++++++ python/xen/xend/server/SrvDomain.py |

Hi Everyone, How can I make use of xm sched-credit in a VPS hosting environment? Can I use "xm sched-credit -d <domain>" in a script at system startup, or does this have to be run after the respective guest has been started? Also, what happens when the guest is shutdown then restarted, or rebooted? Do I need to run that command again? If so, how would I automate this process?

Hello. I am using XEN 3.4.2 and 4.0.1 with dom0 based on Centos 5.x and Debian 6.0. I can scale RAM with paravirt domU''s by using xm mem-max and xm mem-set But, I see this: http://msdn.microsoft.com/en-us/windows/hardware/gg487553 . Is it possible to change memory at Window HVM domU''s without reboot? Thans a lot! -- Best Regards, alex.faq8@gmail.com

On Tue, Aug 27, 2019 at 1:05 PM Sven Schwedas <sven.schwedas@tao.at> wrote: > That depends on what you plan on doing with the host. IIRC live VM > migrations use host CPU time, and depending on transport can use quite a > bit of CPU (for encryption/compression). Same with storage, if you have > a ZFS/btrfs/LVM2/RAID/encryption setup that requires a lot of CPU, > that's

On 02/15/2015 11:25 AM, Raghavendra K T wrote: > Paravirt spinlock clears slowpath flag after doing unlock. > As explained by Linus currently it does: > prev = *lock; > add_smp(&lock->tickets.head, TICKET_LOCK_INC); > > /* add_smp() is a full mb() */ > > if (unlikely(lock->tickets.tail &

On 02/15/2015 11:25 AM, Raghavendra K T wrote: > Paravirt spinlock clears slowpath flag after doing unlock. > As explained by Linus currently it does: > prev = *lock; > add_smp(&lock->tickets.head, TICKET_LOCK_INC); > > /* add_smp() is a full mb() */ > > if (unlikely(lock->tickets.tail &

On a 8 Core system only dom0 can set cap > 100 and vcpus > 1. On a domU ''xm sched-credit -d <domU> -c 200'' says "Error: cap is out of range". Vcpu cannot be set higher than 1 - regardless of boot/config/command line. Low performance is equivalent to the cap setting. See ''xm list --long'': (domain (domid 0) (uuid

Hi all, So I have been playing around with XCP and the static/dynamic memory parameters. I have a few behavioral questions I would like to pin down: -Is the static-max quantity of free memory on the host always required before the guest vm can be started? I assume so since you don''t know a-priori if the guest you are booting supports Xen or not. But if this is true, what is the use of

Hi. I start FreeBSD in xen 3.3.1 as domU with 1024Mb Ram(HVM mode) xm cr freebsd After that, I want more RAm - for example 4096Mb; but with this FreeBSD have bugs - he cant see LAN card, and other. domU - debian lenny. Do any know this bug??? -- Best Regards, alex.faq8@gmail.com _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com