This is my first post, so please be nice I guess?
I'm learning about ARMv8 programming in a class I'm taking right now, but I don't want to install a 1.5G IDE to start working with it.
Is there a way such that I can emulate a Cortex-A57 CPU on my x86_64 Arch laptop, and just use vim, gdb and gcc?
I looked into QEMU but I have no clue how to actually use it to emulate the machine I'm looking for. The guides that I have seen make little to no sense to me. I'd expect that perhaps it was just as simple as setting up QEMU with a hard disk, insert it into a Cortex-A57 emulated machine and get to work on it. But so far that has not working.
Related
In this tutorial you can see how to extract the VHD image file of the Windows XP contained in the "Windows XP Mode".
The tutorial also explains how to run it on VirtualBox and it works nicely (no special parameter, you just add the disk).
But I want to run it on QEmu and there I get a blue screen.
This is the command I'm using:
qemu-system-i386 -m 1G --enable-kvm -drive file=VirtualXP.vhd
I tried to convert the image to qcow2, raw, ... same issue.
I tried x86_64... same issue.
I tried without --enable-kvm... same issue but the blue screen is covered partly by a black rectangle.
After the blue screen it restarts and allows me to choose safe mode. But all options give this identical blue screen.
When I boot the image with VirtualBox I noticed that the VM has already a driver installed to allow the use of the host's mouse cursor. I suspect that this image has VM guest drivers installed that are not compatible with QEmu and maybe make it crashes.
Important note: I don't have a Windows XP CD-ROM to help me.
Here is a screen shot of the blue screen (I suppose it will be the exact same error on all machines):
This might have to do with the drivers windows expects, there are various results using search engines to fix/repair this issue I found but they mostly boil down to:
Install standard IDE drivers
Registery edit to add these IDE drivers
If BSOD 0xCE
Remove Intelppm driver
Edit registery to reflect the removal of this CPU driver
I like the idea of a Windows XP image converted to another, for qemu. And it sounded awesome if this was a legal way. And I now know how they solved this. There is a 30 days trail period and after this, our downloaded image will nolonger boot. (unless you redo all your steps on a fresh copy that never has been started).
Sources to help you (and I ) anyway: https://learn.microsoft.com/en-us/windows/client-management/troubleshoot-inaccessible-boot-device
wich was to me very cryptic and what to do?
But it was also reverenced by the following more helpfull article, and i was almost capable of making a bootable harddisk image for qemu because of this: http://0x0badc0de.blogspot.com/2013/05/converting-windows-virtual-machine-from.html
But after some hours back and forth, I wasnt fully successful and even the author mentions the 30day trial. legal, maybe, but still troublesome.
There is however a key included and if you where to acquire a XP install disk, maybe able to obtain a successful install of windows XP with the same 30 days trial. Hope this answer helps you or any traveler to decide their own story.
I am beginner. I want install freebsd on VM and test open source world! I want to write a small function and to put it into kernel of OS, and then I want to use it in another program as a system function.
I just installed freebsd11 on VM. I know a command line environment! I should use a GUI? Where is kernel?
FreeBSD is a wonderful beast once you know all its capabilities, if you want to play with jails, ZFS and build your own kernels, probably this already build image can be a good starting point:
https://fabrik.red/post/test/ more info can be found here including scripts about how to create your own images/jails (custom kernel): https://github.com/fabrik-red/images
There is no GUI on the images, and maybe you will never need one, unless you want to use FreeBSD as a desktop, but FreeBSD shines more on headless systems (no GUI).
Update:
For GUI probably you can give a try to trueos.org or you can install your own Xorg, desk environments
Sounds like you should learn a bit more about what the operating system does before trying to modify the kernel. There are lots of resources about the unix kernels. See the developers handbook, https://www.freebsd.org/doc/en/books/developers-handbook/ or just google and you will find many resources.
I have recently updated to Fedora 21 Beta, and updated all packages. As the final release is scheduled early next month, I don't expect anything big to change. So I think the problem I am facing may well persist into the production release.
The problem is that when using some terminal based applications, the terminal responses very slowly. For example, say I edit a file with Vim in terminal, after a few minutes, it becomes increasingly difficult to use. Every time I hit a keystroke, the cursor will wait like a second to respond. Edit the same file (which is of only a dozen of lines) in GVim, everything works as smoothly as expected. Other terminal based applications shows the same slow response. However, using the terminal itself as an interactive shell has no problem at all.
I understand it is very hard to come by an answer to why it is experiencing this kind of slow response based only on my vague description. However, if anyone can point to where I should look for diagnostics of the problem, some log files etc., it will highly appreciated.
Below are some more details of the system.
The computer is a Dell T3500 workstation with Xeon W3550 CPU, NVIDIA Quadro 2000 GPU. I am using the latest NVIDIA binary driver (both the long live version 340.58 as well as the beta series 346.16 are tried). The open-source driver was uninstalled and its kernel module were blacklisted (lsmod | grep nouveau shows nothing, as expected). The desktop environment is GNOME Classic.
I believe the issue is with the Nvidia driver configuration. I know this question is old, but I was looking for a solution to the same problem in Fedora 22. I experienced this issue when I was using Fedora 21, but I mostly put up with it.
The solution for me was to uncheck Sync to VBlank in the Nvidia X Server settings.
Are you running in a VM whose storage grows as you need it? Perhaps the problem is that the VM is taking time to allocate space as your storage needs grow. If that's the case, after a while you won't have the problem anymore, as your virtual disk will have grown as big as it needs to be.
As for diagnostics, try running "top", look for paging activity and resident set size.
Maybe something has a memory leak. It might not be in the terminal, but in one of its dependencies.
I have access to a server machine, with 3 CUDA enabled GPUs in it, and I would like to use NVidia Parallel Nsight, to remotly debug on the machine.
This works just find.
Now, is it possibble, to start another debug session (possibbly by another developer), on the same machine, but on another GPGPU?
Is it possibble, to do this, if I use gdb on linux?
Thanks,
krisy
Krisy, yes this is possible.
However this case/scenario that you mentioned has not been actively tested internally by the Nsight team yet. I tried this our real quick on a system with a similar setup as the one you mentioned and I was able to debug 2 different instances of CUDA app simulataneously (provided each app runs on a different unique device that is not connected to any output display).
The stability of this is not guaranteed. From what I've tried so far, this worked for me and it should work in theory as well but there were instances where I experienced sluggish behavior on my system.
For other developers who are interested to know more about this, please take a look at: http://forums.nvidia.com/index.php?showtopic=201211
I am new to learning CUDA and I was looking around for a good emulator to run my CUDA programs on, since my laptop does not come with a Graphics card.
I have heard of mcuda and gpuocelot but they seem to have terrible and confusing documentation. I have been trying to get them installed for a few hours now but with very little progress.
Does any one know of a decent GPU emulator with good documentation. I am using Ubuntu 10.10
operating system
Thank you,
Gaurish
nvcc has an option to turn on the emulation mode and will run the entire application on your CPU. You don't need to have a CUDA enabled GPU for this, of course.
nvcc -deviceemu my_first_app.cu
I tried for GPUocelot on ubuntu 12.04.
its time consuming job we have to download some folders from "http://gpuocelot.googlecode.com/svn/trunk/ "I hope it will work after downloading these folders using svn.
here is link where you can find all steps to install gpuocelot
http://barefeg.wordpress.com/2012/06/16/how-to-install-gpuocelot-in-ubuntu-12-04