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User base from 0x0->0x10000; user image size limit from 128MB->16MB; trigger race condition on k210

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This commit is contained in:
Yifan Wu 2021-10-03 07:36:41 -07:00
parent a341b338c8
commit ff5055386b
5 changed files with 18 additions and 14 deletions
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16
user/src/bin/race_adder.rs
View file

@ -5,20 +5,21 @@
extern crate user_lib;
extern crate alloc;
use user_lib::{exit, thread_create, waittid};
use user_lib::{exit, thread_create, waittid, get_time};
use alloc::vec::Vec;
static mut A: usize = 0;
const PER_THREAD: usize = 10000000;
const THREAD_COUNT: usize = 50;
const PER_THREAD: usize = 2000000;
const THREAD_COUNT: usize = 8;
unsafe fn f() -> ! {
let start = get_time();
for _ in 0..PER_THREAD {
let a = &mut A as *mut usize;
let cur = a.read_volatile();
a.write_volatile(cur + 1);
}
exit(0)
exit((get_time() - start) as i32)
}
#[no_mangle]
@ -27,10 +28,13 @@ pub fn main() -> i32 {
for _ in 0..THREAD_COUNT {
v.push(thread_create(f as usize) as usize);
}
let mut time_cost = Vec::new();
for tid in v.iter() {
waittid(*tid);
time_cost.push(waittid(*tid));
}
for (i, cost) in time_cost.iter().enumerate() {
println!("cost of thread#{} is {}ms", i, cost);
}
assert_eq!(unsafe { A }, PER_THREAD * THREAD_COUNT);
println!("total = {}", unsafe { A });
0
}

4
user/src/linker.ld
View file

@ -2,7 +2,7 @@
OUTPUT_ARCH(riscv)
ENTRY(_start)
BASE_ADDRESS = 0x0;
BASE_ADDRESS = 0x10000;
SECTIONS
{
@ -29,4 +29,4 @@ SECTIONS
*(.eh_frame)
*(.debug*)
}
}
}