Crate process_memory

Expand description

Process memory querying.

This crate provides a cross-platform way to query the RSS (resident set size) usage of a process.

On Linux, procfs is used, and one of three files may be read, depending on their availability:

/proc/self/smaps_rollup: This file is a pre-aggregated version of /proc/self/smaps, and is the most efficient way to query RSS. (Available in Linux 4.14+)
/proc/self/smaps: This file contains detailed information about the memory mappings of the process, and can be aggregated to determine the resident set size. (Available in Linux 2.6.14+)
/proc/self/statm: This file contains lazily-updated memory statistics about the process, and is the least accurate, but is generally good enough for most use-cases. (Available in Linux 2.6+)

On macOS, we query the kernel directly for Mach task information.

Available since Mac OS X 10.0 (Cheetah).

On Windows, we query the kernel directly for process memory counters.

Available since Windows XP/Server 2003.

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