christoph/wamr
1
Fork 0
Code Releases Activity

Implement suspend flags as atomic variable (#2361)

Browse Source 
We have observed a significant performance degradation after merging
https://github.com/bytecodealliance/wasm-micro-runtime/pull/1991
Instead of protecting suspend flags with a mutex, we implement the flags
as atomic variable and only use mutex when atomics are not available
on a given platform.
This commit is contained in:
Marcin Kolny
2023-07-21 01:27:09 +01:00
committed by GitHub
parent fbe072c0d3
commit 0f4edf9735
8 changed files with 135 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
core/iwasm/interpreter/wasm_interp_fast.c
View File

@ -1065,18 +1065,17 @@ wasm_interp_call_func_import(WASMModuleInstance *module_inst,
#endif
#if WASM_ENABLE_THREAD_MGR != 0
#define CHECK_SUSPEND_FLAGS() \
do { \
os_mutex_lock(&exec_env->wait_lock); \
if (exec_env->suspend_flags.flags != 0) { \
if (exec_env->suspend_flags.flags & 0x01) { \
/* terminate current thread */ \
os_mutex_unlock(&exec_env->wait_lock); \
return; \
} \
/* TODO: support suspend and breakpoint */ \
} \
os_mutex_unlock(&exec_env->wait_lock); \
#define CHECK_SUSPEND_FLAGS() \
do { \
WASM_SUSPEND_FLAGS_LOCK(exec_env->wait_lock); \
if (WASM_SUSPEND_FLAGS_GET(exec_env->suspend_flags) \
& WASM_SUSPEND_FLAG_TERMINATE) { \
/* terminate current thread */ \
WASM_SUSPEND_FLAGS_UNLOCK(exec_env->wait_lock); \
return; \
} \
/* TODO: support suspend and breakpoint */ \
WASM_SUSPEND_FLAGS_UNLOCK(exec_env->wait_lock); \
} while (0)
#endif