apps_memtest.md

INTRODUCTION

App	Extra modules	Enabled features	Description
memtest	axalloc	alloc, paging	Dynamic memory allocation test

RUN

$ make A=apps/memtest SMP=4 LOG=info run
...
Running memory tests...
test_vec() OK!
test_btree_map() OK!
Memory tests run OK!
[  0.523323 3 axhal::platform::qemu_virt_riscv::misc:2] Shutting down...
...

STEPS

step1

init

After executed all initial actions, then arceos calls main function in memtest app.

step2

fn test_vec() {
...
    let mut v = Vec::with_capacity(N);
...
}
fn test_btree_map() {
...
    let mut m = BTreeMap::new();
...
}
fn main() {
    println!("Running memory tests...");
    test_vec();
    test_btree_map();
    println!("Memory tests run OK!");
}

flow chart

graph TD;
A["rust.alloc runtime"] --> B["impl GlobalAlloc for  axalloc::GlobalAllocator alloc()"];
B --> C["axalloc::GlobalAllocator::alloc()"];
C --> D["simple two-level allocator: if no heap memory, allocate from the page allocator"];

Loading