4899537328
* bench: add more WASI benchmarks This follows up on #5274 to add several more scenarios with which to benchmark WASI performance: - `open-file.wat`: opens and closes a file - `read-file.wat`: opens a file, reads 4K bytes from it, then closes it - `read-dir.wat`: reads a directory's entries Each benchmark is hand-crafted WAT to more clearly control what WASI calls are made. As with #5274, these modules' sole entry point takes a parameter indicating the number of iterations to run in order to use `criterion`'s `iter_custom` feature. * fix: reduce expected size of directory entries
42 lines
1.6 KiB
Plaintext
42 lines
1.6 KiB
Plaintext
;; Read the directory entries of the preopened directory.
|
|
(module
|
|
(import "wasi_snapshot_preview1" "fd_readdir"
|
|
(func $__wasi_fd_readdir (param i32 i32 i32 i64 i32) (result i32)))
|
|
(func (export "run") (param $iters i64) (result i64)
|
|
(local $i i64)
|
|
(local.set $i (i64.const 0))
|
|
|
|
(if (i32.ne (i32.load (i32.const 0)) (i32.const 0))
|
|
(then unreachable))
|
|
|
|
(loop $cont
|
|
;; Read the file into the sole iovec buffer.
|
|
(call $__wasi_fd_readdir
|
|
;; The fd of the preopened directory; the first three are the
|
|
;; `std*` ones.
|
|
(i32.const 3)
|
|
;; The buffer address at which to store the entries and the
|
|
;; length of the buffer.
|
|
(i32.const 16)
|
|
(i32.const 4096)
|
|
;; The location at which to start reading entries in the
|
|
;; directory; here we start at the first entry.
|
|
(i64.const 0)
|
|
;; The address at which to store the number of bytes read.
|
|
(i32.const 8))
|
|
(drop)
|
|
|
|
;; Check that we indeed read at least 380 bytes of directory
|
|
;; entries.
|
|
(if (i32.lt_u (i32.load (i32.const 8)) (i32.const 300))
|
|
(then unreachable))
|
|
|
|
;; Continue looping until $i reaches $iters.
|
|
(local.set $i (i64.add (local.get $i) (i64.const 1)))
|
|
(br_if $cont (i64.lt_u (local.get $i) (local.get $iters)))
|
|
)
|
|
(local.get $i)
|
|
)
|
|
(memory (export "memory") 1)
|
|
)
|