diff options
| author | Tom Gallacher <tomgallacher23@gmail.com> | 2015-12-18 12:24:56 +0000 |
|---|---|---|
| committer | James M Snell <jasnell@gmail.com> | 2016-03-22 07:55:53 -0700 |
| commit | 03e07d32ace26259abdea059bd3b263cef3c55eb (patch) | |
| tree | 18f009cba6fedb17623aae423dc32a8912aa37a4 /src | |
| parent | 8baaa25aec5a052c32d63f1f7f77bbd0e4a78796 (diff) | |
| download | android-node-v8-03e07d32ace26259abdea059bd3b263cef3c55eb.tar.gz android-node-v8-03e07d32ace26259abdea059bd3b263cef3c55eb.tar.bz2 android-node-v8-03e07d32ace26259abdea059bd3b263cef3c55eb.zip | |
src: override v8 thread defaults using cli options
Based on the conversation in #4243 this implements a way to increase
and decrease the size of the thread pool used in v8.
Currently v8 restricts the thread pool size to `kMaxThreadPoolSize`
which at this commit is (4). So it is only possible to
decrease the thread pool size at the time of this commit. However with
changes upstream this could change at a later date.
If set to 0 then v8 would choose an appropriate size of the thread pool
based on the number of online processors.
PR-URL: https://github.com/nodejs/node/pull/4344
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/node.cc | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/node.cc b/src/node.cc index af9cd1ae1b..f9a0519e43 100644 --- a/src/node.cc +++ b/src/node.cc @@ -148,6 +148,8 @@ static const char** preload_modules = nullptr; static bool use_debug_agent = false; static bool debug_wait_connect = false; static int debug_port = 5858; +static const int v8_default_thread_pool_size = 4; +static int v8_thread_pool_size = v8_default_thread_pool_size; static bool prof_process = false; static bool v8_is_profiling = false; static bool node_is_initialized = false; @@ -178,7 +180,6 @@ static uv_async_t dispatch_debug_messages_async; static node::atomic<Isolate*> node_isolate; static v8::Platform* default_platform; - static void PrintErrorString(const char* format, ...) { va_list ap; va_start(ap, format); @@ -3319,6 +3320,7 @@ static void PrintHelp() { " --zero-fill-buffers automatically zero-fill all newly allocated\n" " Buffer and SlowBuffer instances\n" " --v8-options print v8 command line options\n" + " --v8-pool-size=num set v8's thread pool size\n" #if HAVE_OPENSSL " --tls-cipher-list=val use an alternative default TLS cipher list\n" #if NODE_FIPS_MODE @@ -3466,6 +3468,8 @@ static void ParseArgs(int* argc, } else if (strcmp(arg, "--v8-options") == 0) { new_v8_argv[new_v8_argc] = "--help"; new_v8_argc += 1; + } else if (strncmp(arg, "--v8-pool-size=", 15) == 0) { + v8_thread_pool_size = atoi(arg + 15); #if HAVE_OPENSSL } else if (strncmp(arg, "--tls-cipher-list=", 18) == 0) { default_cipher_list = arg + 18; @@ -4285,8 +4289,7 @@ int Start(int argc, char** argv) { V8::SetEntropySource(crypto::EntropySource); #endif - const int thread_pool_size = 4; - default_platform = v8::platform::CreateDefaultPlatform(thread_pool_size); + default_platform = v8::platform::CreateDefaultPlatform(v8_thread_pool_size); V8::InitializePlatform(default_platform); V8::Initialize(); |