hypervisor | hypervisor embedded system | Infrastructure Automation library

[Answer is based on the live debug and configuration settings done to improve performance]

Factors that were affecting performance for Kernel and DPDK interfaces were

1. Host system was not using CPU which were isolated for VM
2. KVM-QEMU CPU threads were not pinned
3. QEMU was not using huge page backed memory
4. emulator and io threads of QEMU were not pinned.
5. Inside VM the kernel boot parameter was set to 1GB, which was causing TLB to miss on the host.

Corrected configuration:

1. setup host with 4 * 1GB huge page on host
2. edit qemu XML to reflect VCPU, iothread, emulator threads on desired host CPU
3. edit qemu to use host 4 * 1GB page
4. edit VM grub to have isolate CPU and use 2MB pages.
5. run DPDK application using isolated core on VM
6. taskset firecracker thread on ubuntu

We were able to achieve around 3.5X to 4X performance on the current DPDK code.

note: there is a lot of room to improve code performance for DPDK primary and secondary application also.

When installing a new compute node, there is a configuration file nova-compute.conf that is being created automatically.

It seems that in /etc/nova/nova-compute.conf there is an option:

With your shown samples, could you please try following.

To solve the problem, you need SQL Server installed in your machine.

If you have windows 10 in your system, check if you have SQL Server installed in Apps and features.

You can also check if you have any version of Microsoft.SqlServer.Types in your GAC_MSIL (Global Assembly Cache) directory on C:\Windows\assembly\GAC_MSIL\Microsoft.SqlServer.Types, if this folder is empty or does not exist, you will need to install Microsoft.SqlServer.Types in your machine.

If your dynamic SQL is built in a variable before being executed, you could just use a PRINT statement to see what the queries are, like PRINT @SQL. Then it would show in your Messages window in SSMS.

You can make it work by specifying your AMI's with a for_each and thus getting a map which you can access by key.

My data.aws_ami.myamis looks like this:

Could you please give what this prints out echo $restore . PHP_EOL; by commenting out the str_replace2() on $restore?

C# is a case-sensitive language so filename does not refer to the same variable as fileName, i.e. these don't match:

INTRODUCTION

First of all, I know that there are some posts out there. But there not up to date or incomplete. I want to point that my intention with this post is to make a nearly 100% working knowledge base for this issue. Serving as a step by step tutorial for fixing that problem properly.

Don't panic, we will fix that now :)

CHECK-1:

Check your BIOS Settings first. Virtualization Technology needs to be enabled in BIOS. Gigabyte, Asus Rog or MSI for example call that SVM Mode ("Secure Virtual Machine") other may call that as mentioned: "Virtualization"

F2/Del to access BIOS -> Advanced Settings -> CPU Configuration -> SVM Mode -> Enable, safe that with F10 (Asus BIOS Example)

As BIOS options are different among vendors, please refer to your system manufacturer's manual.

CHECK-2:

Type in your Windows searchbar (Lower left corner) "Windows Features". Make sure Hyper-V and Windows Hypervisor Platform are disabled. All Windows features enabling Hyper-V either explicitly or silently must be turned off. Restart your computer after. See the screenshots below for what you need to uncheck:

Note that in a future Studio 4.0 release, these instructions will be automatically run as part of the SDK Manager update and become obsolete.

CHECK-3:

To really ensure that Hyper-V is disabled run following command in Powershell. Open powershell: Right click on your Windows Logo (Lower left corner) -> click Windows Powershell (Administrator) -> proceed with following command:

Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V

SETUP ANDROID STUDIO

We now want to install the missing Hypervisor Driver for AMD Processors: In Android Studio navigate File -> Settings -> expand Appearance & Behavior -> expand System Settings -> Android SDK -> SDK Tools -> install Android Emulator Hypervisor Driver for AMD Processors (installer) -> Apply -> OK

RUN THE INSTALLER

Now you downloaded the package of the driver you need to find it's location. In the image below you see the path of your Android SDK's.

Copy that path into your Explorer and navigate through like in image below to your silent_install.bat

Copy the complete path of your explorer and run Powershell as Administrator (how to open, explained above). In Powershell type:

cd [here your copied path]

Afterwards execute your installer by typing:

.\silent_install.bat

You will probably get an error, but that isn't important, because the installer worked. We will see it later. The service only couldn't start because one of our 3 CHECKS above are not done properly. Then it will look something like that:

We use this "worst case" to proof that the installer operated sucessfully even with the following errors.

[SC] DeleteService succeed. Fail of [SC] StartService error 4294967201

They may lead you to a github directory. To download a code there, but it isn't necessary at all. It worked already. Let's try it out.

PS: If everything went as it should it will look like that (Best case):

CREATING EMULATOR DEVICE

Let's create an android device and test it. I made it step by step as shown in the screenshots:

After you selected a device you are finally able to download the android version of the device:

Make your unique settings:

Run your device:

FINAL & CONCLUSION

Now you are able to work with the android studio emulator and an AMD Processor. Congratz! :) I know it was a long tutorial, but you made it trough. If you face any issues, comment below, I try to help you! That was it once again from my side. I keep this post updated.