All Questions

I Am implementing Lockless ring buffer for multiple producer and single consumer (keeping in plan to extend it to multiple produce and consumer) using design reference of dpdk buffer : https://doc....

I am reading about blocking memory allocation idea in book Real time concepts in embedded systems by QingLi. A blocking memory allocation function can be implemented using both a counting semaphore ...

Here is the code: void (*volatile sys_func)(void); void main(int argc, char **argv) { int i, j; for (j = 0; j < 3; ++j) { for (i = 0; i < 10000; ++i); sys_func(); } ...

am currently working on an assignment to simulate and analyze the performance of various CPU scheduling algorithms (such as FCFS, SJF, and Round Robin). I was given a list of workload scenarios to ...

During debugging of some native code, I jumped into the assembly of calloc() on my MacOS (ARMv8). And I see some interesting technique, that seems to be checking if the instructions are defined at ...

I have a mini-project in which the objective is to simulate the movement of multiple robots (threads) on a 2D matrix (shared resource), using semaphores to ensure mutual exclusion when accessing the ...

On Linux, I can use tools like vmstat 1 2 or read from /proc/stat to measure the total and average number of context switches over a given time interval (for example, 1 second). Is there an equivalent ...

I am implementing an EXT2 filesystem driver and trying to understand the purpose of block group descriptors. From the superblock, I already know: s_blocks_per_group - number of blocks in each block ...

I'm building a small practice OS, I'm writing linker scripts and using ld to produce ELF files that my OS loader will load manually. Here’s my current understanding of the loading process for ELF ...

I was reading an article on the Memory Layout of C Programs; https://www.geeksforgeeks.org/c/memory-layout-of-c-program/. It mentioned, under "4. Stack Segment": When the stack and heap ...

This CPU Usage (Precise) view below seems to indicate that this thread's quantum is expiring after only 0.012 milliseconds on row 19. Rows 6 and 29 look normal with a 15 millisecond thread quantum ...

I am working on an assembly kernel, using the OSDev Wiki and a PDF from Nick Blundell. I have set up my GDT and it seems to work fine. I am also able to load the IDTR as well. However, when I try to ...

I would like to run a single-threaded program in MacOS 26.0 at the highest QOS level (QOS_CLASS_USER_INTERACTIVE), in order to get more consistent performance on a compute-bounded benchmark. By ...

void bootmain(void) { struct Proghdr *ph, *eph; // read 1st page off disk readseg((uint32_t) ELFHDR, SECTSIZE*8, 0); // is this a valid ELF? if (ELFHDR->e_magic != ELF_MAGIC) ...

If a directory contains broken or unresponsive mount points (for example, FUSE or NFS mounts), standard tools like file managers, or even a simple ls from the command line, can hang forever when ...