T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #2821 from alexcrichton/faster-vmoffsets

Browse Source 
Precompute fields in `VMOffsets`
This commit is contained in:
Nick Fitzgerald
2021-04-08 14:17:11 -07:00
committed by GitHub
parent 18dd82ba7d c91e14d83f
commit 2a32567871
4 changed files with 221 additions and 199 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
crates/runtime/src/instance/allocator/pooling.rs
View File

@@ -21,7 +21,7 @@ use std::mem;
use std::sync::{Arc, Mutex};
use wasmtime_environ::{
entity::{EntitySet, PrimaryMap},
MemoryStyle, Module, Tunables, VMOffsets, WASM_PAGE_SIZE,
MemoryStyle, Module, Tunables, VMOffsets, VMOffsetsFields, WASM_PAGE_SIZE,
};
cfg_if::cfg_if! {
@@ -302,7 +302,7 @@ impl InstancePool {
let page_size = region::page::size();
// Calculate the maximum size of an Instance structure given the limits
let offsets = VMOffsets {
let offsets = VMOffsets::from(VMOffsetsFields {
pointer_size: std::mem::size_of::<*const u8>() as u8,
num_signature_ids: module_limits.types,
num_imported_functions: module_limits.imported_functions,
@@ -313,7 +313,7 @@ impl InstancePool {
num_defined_tables: module_limits.tables,
num_defined_memories: module_limits.memories,
num_defined_globals: module_limits.globals,
};
});
let instance_size = round_up_to_pow2(
mem::size_of::<Instance>()