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Hard · memory_optimization · Quant Developer interview question · virtual-memory, mmap, mprotect, memory_optimization, prefault, page-fault
High-frequency trading (HFT) systems pre-allocate memory to eliminate runtime page faults, which cause unpredictable latency. This is achieved by reserving a large virtual address space and then committing only the necessary portion, ensuring all kernel interactions happen at startup. This problem simulates this "memory warmup" process to guarantee deterministic performance for critical data structures like ring buffers. Task Implement the function virtual_mem_warmup(long reserve_mb, long commi