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Reduce concurrency when using glibc-based Linux

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to help prevent memory fragmentation
This commit is contained in:
Lovell Fuller
2021-03-09 21:58:47 +00:00
parent 58526cc849
commit 5a9cc835b3
6 changed files with 35 additions and 6 deletions
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1
src/sharp.cc
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@@ -44,6 +44,7 @@ Napi::Object init(Napi::Env env, Napi::Object exports) {
exports.Set("libvipsVersion", Napi::Function::New(env, libvipsVersion));
exports.Set("format", Napi::Function::New(env, format));
exports.Set("_maxColourDistance", Napi::Function::New(env, _maxColourDistance));
exports.Set("_isUsingJemalloc", Napi::Function::New(env, _isUsingJemalloc));
exports.Set("stats", Napi::Function::New(env, stats));
return exports;
}

16
src/utilities.cc
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@@ -225,3 +225,19 @@ Napi::Value _maxColourDistance(const Napi::CallbackInfo& info) {
return Napi::Number::New(env, maxColourDistance);
}
#if defined(__GNUC__)
// mallctl will be resolved by the runtime linker when jemalloc is being used
extern "C" {
int mallctl(const char *name, void *oldp, size_t *oldlenp, void *newp, size_t newlen) __attribute__((weak));
}
Napi::Value _isUsingJemalloc(const Napi::CallbackInfo& info) {
Napi::Env env = info.Env();
return Napi::Boolean::New(env, mallctl != nullptr);
}
#else
Napi::Value _isUsingJemalloc(const Napi::CallbackInfo& info) {
Napi::Env env = info.Env();
return Napi::Boolean::New(env, false);
}
#endif

1
src/utilities.h
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@@ -24,5 +24,6 @@ Napi::Value simd(const Napi::CallbackInfo& info);
Napi::Value libvipsVersion(const Napi::CallbackInfo& info);
Napi::Value format(const Napi::CallbackInfo& info);
Napi::Value _maxColourDistance(const Napi::CallbackInfo& info);
Napi::Value _isUsingJemalloc(const Napi::CallbackInfo& info);
#endif // SRC_UTILITIES_H_