dragazo / alloc-metrics

A rust global allocator that tracks allocation metrics

Description

alloc-metrics is a simple crate that adds a new global allocator type that tracks the total number of allocations and actual bytes allocated. In typical programs, this could be useful to get a plot of memory utilization over time for debugging purposes, or could be used in interpreter runtimes to limit the amount of memory a script is allowed to use.

Setup

To get started using alloc-metrics, you must first set the global allocator for your project:

use alloc_metrics::MetricAlloc;

#[global_allocator]
static GLOBAL: MetricAlloc<std::alloc::System> = MetricAlloc::new(std::alloc::System);

Note that the [MetricAlloc] type is able to wrap any existing global allocator type. Thus, you can compose the features of alloc-metrics with any other global allocator you want.

Features

• thread: gives access to thread-local allocation metrics (requires std).
• global: gives access to global allocation metrics.

no-std

This crate is fully compatible in no-std environments by disabling default features:

alloc-metrics = { version = "...", default-features = false, features = ["global"] }

Note that we re-enabled the global feature so that we still have access to global allocation metrics (see feature list above).