That sentence might seem a little strange. If the ring buffer is used to store messages from events that take place during the startup sequence, how can live messages arrive in the ring buffer once the computer is up and running?
Anything that causes a change in the hardware connected to your computer will cause messages to be sent to the kernel ring buffer. Even virtual hardware will cause new messages to appear in the ring buffer. Note that you are not returned to the command prompt. When new messages appear they are displayed by dmesg at the bottom of the terminal window. Use the tail command to retrieve the last ten kernel ring buffer messages.
Of course, you can retrieve any number of messages. Ten is just our example. Pipe the output from dmesg through grep to search for particular strings or patterns.
We can isolate the messages that contain references to the first SCSI hard disk on the system sda. All of the messages that mention sda are retrieved and listed in the terminal window. To make grep search for multiple terms at once, use the -E extend regular expression option.
Every message logged to the kernel ring buffer has a level attached to it. The level represents the importance of the information in the message. The levels are:. We can make dmesg extract messages that match a particular level by using the -l level option and passing the name of the level as a command-line parameter. All of the messages that are listed are informational messages. We can ask dmesg to filter its output to only show messages in a specific facility.
To do so, we must use the -f facility option:. As we did with the levels, we can ask dmesg to list messages from more than one facility at once:. The -x decode option makes dmesg show the facility and level as human-readable prefixes to each line. If you are having issues with a piece of hardware not being recognized or not behaving properly, dmesg may throw some light on the issue.
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These drivers will eventually be shipping on Windows Update and along with new system when the next version of Windows is released. In terms of Mesa, most distribution today are still on older Depending on when you read this, accelerated OpenGL in WSLg may or may not immediately light up on your system as you may still be running an older version of Mesa.
This new distribution of Ubuntu is built from bleeding edge components an includes support for Mesa On discrete GPUs this means that rendered content needs to be copied to system memory before being presented to the compositor, to be brought back onto the GPU in the RDP client running on Windows.
This cost scales with the frame rate, and application running at super high frame rate will see a more significant impact than applications running at more reasonable frame rates. This is for Geeks3D GpuTest running piano. Although there is a hit in performance due to having to do system memory interop, the result is still much better performance than software rendering. Closing the performance gap between native win32 application and Linux applications running in WSLg is something we want to improve for WSLg v2 and beyond, but for v1 we wanted to focus our energy on the core experience while still offering good performance, even if not native.
If you encounter problems or want to offer suggestions, please open an issue on the official WSLg project page. Comments are closed. So on a running at very high frame frate, the impact of this system memory interop is pretty severe.
On an integrated GPU like Intel, the data remains in system memory the whole time, so there is less overhead per frame… also since the overhead scale with the frame rate and that we start at a pretty low frame rate… the end result is pretty close. This is an area we want to improve in the future with v2 and beyond. We had share some plan around this at XDC, but scale back from those for v1. Vulkan and PipeWire are definitely on our list of things we would like to enable as well at some point in the future Hi I just compiled mesa3d.
It seems I got GPU test is still running really slow. Wondering whether there is any configuration i should use when compiling mesa?
Ivy Bridge. I have a iu with HD and driver No other Intel driver exposes that functionality. Trying installing the one from the blog. Thanks for the reply. Same problem; after digging into the release notes on the page, minimal intel processor that supports wslg vgpu is 7th gen core, with 6xx GPU.
Applications using CUDA should not have any problem. I suppose would be handles by WSLg, but the internal content of it, the app would want to draw by itself, so — what if it wanted to employ CUDA in doing so? How seamless would the development experience be in such a scenario?
Great article. In our environment we are doing some test with WSL2 and CUDA because this is way faster that running this on Windows only and removed the hassle from having to have a full Linux host. Anyway the issue we ran into is graphics support via RDP connections. Do you perhaps have any insight on this? I find it hard to tell if this touches on your work as you are speaking of using the RDP protocol to get things done but on the other hard it seems to be a more local use of the RDP protocol.
Thanks for sharing these details about the design and decisions taken here! Or am I just looking in the wrong place? Also curious to see any available protocol documentation. Unfortunately I get an error and I can't interact in any way not even key echoing. I can't even enter a command like it looks like he could. But it's not clear to me exactly what's going on in my case or how to fix it. Where do the virtual consoles Ctrl-Alt-F fit into the process? Do I need to add a keyboard driver to my initramfs?
Thanks Seth. I leaned that I can run commands in the init script and they will show on the screen - I just can't interact with the keyboard. Does that mean they are "set up"? I tried doing the same thing and running it in the background with.
I'm guessing init is not supposed to finish. Also, if it could be related to what's going on: When I boot my system up normally, it doesn't go right into a display manager or a console. I can't type anything. If I press Ctl-Alt-1 it does nothing just like when I run my custom init.
It's been this way for a while. The difference with my init script is that I can't Ctl-Alt-anything. When I boot my system up normally, it doesn't go right into a display manager or a console. The important part is setsid and you may have to pass absolute paths. Again with no ability to interact. I'm assuming the kernel would have needed a full path name. Do you think this could be the cause of everything? I will update below:. But why are X and systemd running in the first place?
Aren't they in userspace, and I'm bypassing them by passing the init kernel parameter?
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