Getting Guru Mediation even though 8GB RAM is allocated

[vishnubeema]

Hello,

Recently I installed Virtual Box “VirtualBox-6.1.32-149290-Win” on Windows 10.
Within VirutalBox I installed Ubuntu “ubuntu-18.04-desktop-amd64.iso”.

My Laptop has 16GB RAM. So in VirtualBox settings I kept RAM as 8GB (8192 MB). Hard disk size, I allocated 120GB with "Dynamically allocated" option. But still I am getting "Guru Mediation" with below error.

00:14:53.138160 AssertLogRel F:\tinderbox\win-6.1\src\VBox\VMM\VMMR3\PGMPhys.cpp(6212) int __cdecl PGMR3PhysAllocateHandyPages(struct VM *): RT_SUCCESS(rc)
00:14:53.138210 57/128: idPage=0x1f8200 HCPhysGCPhys=000000011e6ad000 rc=VERR_MAP_FAILED
00:14:53.141089 Changing the VM state from 'RUNNING' to 'GURU_MEDITATION'
00:14:53.141126 Console: Machine state changed to 'GuruMeditation'
00:14:53.141159 VM: Raising runtime error 'HostMemoryLow' (fFlags=0x2)
00:14:53.141233 VM: Raising runtime error 'HostMemoryLow' (fFlags=0x2)

Attached complete log for your reference.
I am not sure why this error occurs. I have gone through forum but could not find exact reason. Should I need to increase or decrease RAM allocation of Virtual Box.

Thanks & Regards
Vishnu Beema

[scottgus1]

Start the VM from full normal shutdown, not save-state. Run until you see the problem happen, then shut down the VM from within the VM's OS if possible. If not possible, close the Virtualbox window for the VM with the Power Off option set.

Right-click the VM in the main Virtualbox window's VM list, choose Show Log. Save the far left tab's log, zip it, and post the zip file, using the forum's Upload Attachment tab.

[vishnubeema]

Hi,

Thank you for your inputs. I already attached log. Not sure is it visible. Once again I am attaching the log. Please confirm.

Thanks & Regards
Vishnu Beema

[mpack]

00:00:02.888440 Host RAM: 15761MB (15.3GB) total, 7917MB (7.7GB) available
00:00:03.762573 CPUM: Physical host cores: 4
...
00:00:03.032228 RamSize <integer> = 0x0000000200000000 (8 589 934 592, 8 192 MB, 8.0 GB)
00:00:03.032353 VRamSize <integer> = 0x0000000008000000 (134 217 728, 128 MB)
00:00:03.032227 NumCPUs <integer> = 0x0000000000000004 (4)
...
00:14:53.141159 VM: Raising runtime error 'HostMemoryLow' (fFlags=0x2)

You are allocating RAM and CPU you don't have (or need for the host). Reduce RAM to 6GB or less and reduce CPU cores to 2.

I see that you also allocate a 120GB virtual hard drive. That's on the large side for a VM too - I hope your host can afford it.

[vishnubeema]

Thank you for your inputs.
For better clarity, can you please give more details for each query.

1) On my Laptop, I have RAM of 16MB as shown in snapshot "Base_Memory.jpg". So I allocated half of the RAM memory to VM. But in "Device_Specifications.jpg" I am seeing only 15.4GB usable. Whether due to this I need to reduce RAM to 6GB in VM.

2) As per snapshot "Processor.jpg", in VM its showing as 8 CPU. Because of that I allocated 4 to VM. But in log its showing as "Physical host cores: 4". Does it mean Intel i7 core has only 4 CPUS/Cores. If there are 4 cores then why VM is showing 8.

3) I have 512GB flash where 278GB is allocated as D:\ drive and the remaining as C:\ drive. I installed VM & ubuntu in D:\ drive. To build BSP and other code base need more memory. Any issue with VirtualBox if 120GB is allocated. If any issue, please let me know what max virtual hard disk I can be allocated.

Thanks & Regards
Vishnu Beema

[vishnubeema]

For better understanding, can you please comment on above queries. I don't want to assume and need inputs from experts like you.

[mpack]

You later cross posted this question and I already provided a better explanation in my first reply of the later topic. I will not repeat myself in each cross post topic, in fact I had better lock this one to prevent further wasted time.

I will add that you can review the capabilities of your CPU here: https://ark.intel.com/content/www/us/en ... h-ipu.html. You will see that it has 4 cores. Hence if you were to assign 4 cores to the VM that would leave 0 cores for the host. Also threads are not cores. If they were then no CPU would need more than one core.