memory

How to benchmark memory usage of a function?

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You can use the jemalloc allocator to print the allocation statistics. For example, Cargo.toml: [package] name = “stackoverflow-30869007” version = “0.1.0” edition = “2018” [dependencies] jemallocator = “0.5” jemalloc-sys = {version = “0.5”, features = [“stats”]} libc = “0.2” src/main.rs: use libc::{c_char, c_void}; use std::ptr::{null, null_mut}; #[global_allocator] static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc; extern “C” fn … Read more

RuntimeError: CUDA out of memory. How can I set max_split_size_mb?

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The max_split_size_mb configuration value can be set as an environment variable. The exact syntax is documented, but in short: The behavior of caching allocator can be controlled via environment variable PYTORCH_CUDA_ALLOC_CONF. The format is PYTORCH_CUDA_ALLOC_CONF=<option>:<value>,<option2>:<value2>… Available options: … max_split_size_mb prevents the allocator from splitting blocks larger than this size (in MB). This can help prevent … Read more

what’s ARM TCM memory

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TCM, Tightly-Coupled Memory is one (or multiple) small, dedicated memory region that as the name implies is very close to the CPU. The main benefit of it is, that the CPU can access the TCM every cycle. Contrary to the ordinary memory there is no cache involved which makes all memory accesses predictable. The main … Read more

Haskell recursion and memory usage

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Don’t worry quite so much about the stack. There is nothing fundamental that says function calls have to be implemented using stack frames; that is merely one possible technique for implementing them. Even when you have “the stack”, there’s certainly nothing that says the stack has to be limited to a small fraction of available … Read more

Is there a need to check for NULL after allocating memory, when kernel uses overcommit memory

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Yes, you should still check for failures returned by malloc. In an environment that overcommits memory you will not be able to detect and recover from failures due to the environment running out of physical storage required when you write to parts of the address space that have been allocated to your program by a … Read more

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