unmap | JavaScript Source Map back into filesystem structure | Map library

Is it possible to find unmapped properties with the System.Text.Json.JsonSerializer?

I'm accessing an API which returns an array of documents. I want to know if there is a way to know if there is an property in the json document which is not mapped by my C# type. At best a method that returns a list of unmapped properties.

JSON Document

I want to ensure that my D3D12_HEAP_TYPE_UPLOAD resource has been upload before I use it.

Apparently to do this you call ID3D12Resource::Unmap, ID3D12CommandList::Close, ID3D12CommandQueue::ExecuteCommandList and then ID3D12CommandQueue::Signal.

However, this confuses me. The call ID3D12Resource::Unmap is completely unconnected to the command list and queue, except by the device the resource was created on. But I have multiple command queues per device. So how does it chose which command queue to upload the resource on?

Is this documented anywhere? The only help I can find are comments in the samples.

My issue here is that my Xmobar says that it's "Updating..." when I provide the layout with a path to a C script (the executable)that I hacked together. I included Run Stdinreader and that made no dent on the issue.

I was under the impression that if a script can output to the terminal, it could to Xmobar. This C script is responsible for printing a quote to the terminal based on conditions specified. I don't need help with the script itself (although it is rushed and could be better constructed). I just want to know:

Is this an issue with an incompatibility with Xmobar and C? Or, did I forget to do something that will make the taskbar spit out the correct output?

My Xmobar Config is:

Background information:

1. I'm using 64 bit Arch on an x86 system.

2. I'm not using libc or any language that depends on libc. I'm using a proprietary research language. I am making my syscalls through inline assembly.

3. I'm writing an experimental custom allocator for a research project, so a portable solution is a nice-to-have, but not a requirement.

4. My programs are statically linked and I am willing and able to rewrite the libraries I'm using to account for a given solution.

According to this SO post: Where is the stack memory allocated from for a Linux process? A program's virtual address space is organized like this:

I can't figure it out how to properly write and read from a QOpenGLBuffer:: PixelUnpackBuffer.

1. What is the proper setup before writing into a PBO?
2. QOpenGLBuffer::write will not work using with a simple QImage.bits(), or glReadPixels() to pass the FBO render into the PBO. It has to be a specific type of data?
3. How do you use a written PBO with Texture::setData()? A simple Texture.setData(*format*, *pixel_type*, pubo, nullptr) will suffice?

Here some code to exemplify what I'm doing:

I recently switched from using glBufferData to glMapBufferRange which gives me direct access to GPU memory rather than copying the data from CPU to GPU every frame.

This works just fine and in OpenGL ES 3.0 I do the following per frame:

• Get a pointer to my GPU buffer memory via glMapBufferRange.
• Directly update my buffer using this pointer.
• Use glUnmapBuffer to unmap the buffer so that I can render.

But some Android devices may have at least OpenGL ES 3.1 and, as I understand it, may also have the EXT_buffer_storage extension (please correct me if that's the wrong extension ?). Using this extension it's possible to set up persistent buffer pointers which do not require mapping/unmapping every frame using the GL_MAP_PERSISTENT_BIT flag. But I can't figure out or find much online in the way of how to access these features.

How exactly do I invoke glMapBufferRange with GL_MAP_PERSISTENT_BIT set in OpenGL ES 3.1 on Android ?

Examining glGetString(GL_EXTENSIONS) does seem to show the extension is present on my device, but I can't seem to find GL_MAP_PERSISTENT_BIT anwhere, e.g. in GLES31 or GLES31Ext, and I'm just not sure how to proceed.

I am running a SignalR Hub in .NET 5.0 in a Docker container. I am using the inbuild SignalR package for .NET 5.0. It is failing to detect abrupt disconnections. If I instruct SignalR to drop the connection from client-side, it detects the disconnection, but if I just close the browser SignalR doesn't detect the disconnection.

This is the functional equivalent of the code I am using to detect disconnections.

We chose to deploy the mongos router in the same VM as our applications, but we're running into some issues where the application gets OOM Killed because the mongos eats up a lot more RAM than we'd expect / want to.

After a reboot, the mongos footprint is a bit under 2GB, but from here it constantly requires more memory. About 500MB per week. It went up to 4.5+GB

This is the stats for one of our mongos for the past 2 weeks and it clearly looks like it's leaking memory...

So my question is: how to investigate such behavior? We've not really been able to find explanations as of why the router might require more RAM, or how to diagnosis the behavior much. Or even how to set a memory usage limit to the mongos.

With a db.serverStatus on the mongos we can see the allocations:

I am experimenting to replace malloc(3)/calloc(3)/realloc(3)/free(3) via LD_PRELOAD environment variable. I have tried to use the customized functions statically linked, they worked perfectly.

But, when I attached it as shared library to LD_PRELOAD, it always results in segfault.

• I use Linux x86-64 mmap(2) and munmap(2) syscall for malloc(3) and free(3).
• The calloc(3) is just a call to malloc(3) with multiply overflow check.
• The realloc(3) calls malloc(3), then copy old data to new allocated memory and unmap the old memory.

• What is wrong with my approach so that it always result in segfault?
• How can I debug it (gdb and valgrind also segfault)?
• What did I miss here?

I am fully aware that always using mmap for every malloc call is a bad idea, especially for performance. I just want to know why my approach doesn't work.