olivierlambert There are no performance options available in the Ubuntu VM (running 20.04). Am I missing something to check/change for cpu performance?

I have a Ubuntu virtual machine that is used to do some scientific computing with MPI. The VM has 64 vCPU and 200GB of memory. When compared to running the same code on a physical workstation with half the CPU cores and half the memory, the jobs run 10x slower on the VM vs the workstation. The VM is running XenTools and is recognized in XOA.

Below is the lscpu output for both:

Workstation:

Architecture:            x86_64
  CPU op-mode(s):        32-bit, 64-bit
  Address sizes:         46 bits physical, 48 bits virtual
  Byte Order:            Little Endian
CPU(s):                  36
  On-line CPU(s) list:   0-35
Vendor ID:               GenuineIntel
  Model name:            Intel(R) Xeon(R) W-2195 CPU @ 2.30GHz
    CPU family:          6
    Model:               85
    Thread(s) per core:  2
    Core(s) per socket:  18
    Socket(s):           1
    Stepping:            4
    CPU max MHz:         4300.0000
    CPU min MHz:         1000.0000
    BogoMIPS:            4599.93
Virtualization features:
  Virtualization:        VT-x
Caches (sum of all):    
  L1d:                   576 KiB (18 instances)
  L1i:                   576 KiB (18 instances)
  L2:                    18 MiB (18 instances)
  L3:                    24.8 MiB (1 instance)
NUMA:                    
  NUMA node(s):          1
  NUMA node0 CPU(s):     0-35

Ubuntu XCP-ng VM:

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   46 bits physical, 48 bits virtual
CPU(s):                          64
On-line CPU(s) list:             0-63
Thread(s) per core:              1
Core(s) per socket:              64
Socket(s):                       1
NUMA node(s):                    1
Vendor ID:                       GenuineIntel
CPU family:                      6
Model:                           85
Model name:                      Intel(R) Xeon(R) Gold 6242 CPU @ 2.80GHz
Stepping:                        7
CPU MHz:                         2793.534
BogoMIPS:                        5587.06
Hypervisor vendor:               Xen
Virtualization type:             full
L1d cache:                       2 MiB
L1i cache:                       2 MiB
L2 cache:                        64 MiB
L3 cache:                        1.4 GiB
NUMA node0 CPU(s):               0-63

What could be the cause of this? And what's the resolution?

tjkreidl I do have that option enabled. This is also passing the entire GPU through to a VM, and using an AMD GPU.

stormi Does XCP-ng support the v1.37.1 of netdata now? yum install netdata-ui installs v1.19.0, which doesn't look compatible with netdata cloud anymore. When attempting to add the node to netdata cloud, it fails with the error Unable to find usable claiming script. Reinstalling Netdata may resolve this.

Danp There aren't any logs at all in the CLI. In fact /var/log/syslog doesn't even exist.

Danp The xcp-ng server is fully patched. I'm using local storage. Logs show no errors.

It looks like on import, I can only uploadVHD files. VMDK files are the ones that don't work. When uploading VMDKs, the spinning wheel icon goes on forever without any visible progress.

Danp Importing Disks and VMs doesn't work on either latest or stable release channels.

Danp I've been running the latest release channel since I brought XOA online.

Hypervisor is xcp-ng version 8.2. Both the xcp-ng and XOA install are very new. I used the quick deploy to bring XOA up. Everything has been left to the default settings.

I'm very new to xen so please forgive my lack of knowledge and missing information.

Danp Correct, I'm using XOA. I've checked the troubleshooting guide and all seems well. No logs saying anything is wrong and no error messages.

When trying to import disks, VMs, and create recipes in the XO web interface, nothing happens. The spinning wheel graphic just spins, while nothing is created or imported. This is a new install of xo-server 5.85.1 and xo-web 5.90.0