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* Introduce a loading layer in NMSLIB. (#2185) * Introduce a loading layer in NMSLIB. Signed-off-by: Dooyong Kim <[email protected]> * Added NMSLIB istream implementation. Signed-off-by: Dooyong Kim <[email protected]> * Fix integer overflow issue when passing read size for loading NMSLIB vector index. Signed-off-by: Dooyong Kim <[email protected]> * Added unit test for NMSLIB loading layer. Signed-off-by: Dooyong Kim <[email protected]> * Made a patch in NMSLIB to avoid frequently calling JNI for better loading index performance. Signed-off-by: Dooyong Kim <[email protected]> * Compliance constexpr function in C++11 having nullstatement. Signed-off-by: Dooyong Kim <[email protected]> --------- Signed-off-by: Dooyong Kim <[email protected]> Co-authored-by: Dooyong Kim <[email protected]> * Fixed that it's failing to resolve a package in import statement. Signed-off-by: Dooyong Kim <[email protected]> * Move the element in the changelog from 3.x to 2.x. Signed-off-by: Dooyong Kim <[email protected]> --------- Signed-off-by: Dooyong Kim <[email protected]> Co-authored-by: Dooyong Kim <[email protected]>
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/* | ||
* SPDX-License-Identifier: Apache-2.0 | ||
* | ||
* The OpenSearch Contributors require contributions made to | ||
* this file be licensed under the Apache-2.0 license or a | ||
* compatible open source license. | ||
* | ||
* Modifications Copyright OpenSearch Contributors. See | ||
* GitHub history for details. | ||
*/ | ||
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#ifndef OPENSEARCH_KNN_JNI_STREAM_SUPPORT_H | ||
#define OPENSEARCH_KNN_JNI_STREAM_SUPPORT_H | ||
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#include "jni_util.h" | ||
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#include <jni.h> | ||
#include <stdexcept> | ||
#include <iostream> | ||
#include <cstring> | ||
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namespace knn_jni { | ||
namespace stream { | ||
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/** | ||
* This class contains Java IndexInputWithBuffer reference and calls its API to copy required bytes into a read buffer. | ||
*/ | ||
class NativeEngineIndexInputMediator { | ||
public: | ||
// Expect IndexInputWithBuffer is given as `_indexInput`. | ||
NativeEngineIndexInputMediator(JNIUtilInterface *_jni_interface, | ||
JNIEnv *_env, | ||
jobject _indexInput) | ||
: jni_interface(_jni_interface), | ||
env(_env), | ||
indexInput(_indexInput), | ||
bufferArray((jbyteArray) (_jni_interface->GetObjectField(_env, | ||
_indexInput, | ||
getBufferFieldId(_jni_interface, _env)))), | ||
copyBytesMethod(getCopyBytesMethod(_jni_interface, _env)), | ||
remainingBytesMethod(getRemainingBytesMethod(_jni_interface, _env)) { | ||
} | ||
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void copyBytes(int64_t nbytes, uint8_t *destination) { | ||
auto jclazz = getIndexInputWithBufferClass(jni_interface, env); | ||
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while (nbytes > 0) { | ||
// Call `copyBytes` to read bytes as many as possible. | ||
jvalue args; | ||
args.j = nbytes; | ||
const auto readBytes = | ||
jni_interface->CallNonvirtualIntMethodA(env, indexInput, jclazz, copyBytesMethod, &args); | ||
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// === Critical Section Start === | ||
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// Get primitive array pointer, no copy is happening in OpenJDK. | ||
auto primitiveArray = | ||
(jbyte *) jni_interface->GetPrimitiveArrayCritical(env, bufferArray, nullptr); | ||
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// Copy Java bytes to C++ destination address. | ||
std::memcpy(destination, primitiveArray, readBytes); | ||
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// Release the acquired primitive array pointer. | ||
// JNI_ABORT tells JVM to directly free memory without copying back to Java byte[]. | ||
// Since we're merely copying data, we don't need to copying back. | ||
jni_interface->ReleasePrimitiveArrayCritical(env, bufferArray, primitiveArray, JNI_ABORT); | ||
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// === Critical Section End === | ||
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destination += readBytes; | ||
nbytes -= readBytes; | ||
} // End while | ||
} | ||
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int64_t remainingBytes() { | ||
return jni_interface->CallNonvirtualLongMethodA(env, | ||
indexInput, | ||
getIndexInputWithBufferClass(jni_interface, env), | ||
remainingBytesMethod, | ||
nullptr); | ||
} | ||
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private: | ||
static jclass getIndexInputWithBufferClass(JNIUtilInterface *jni_interface, JNIEnv *env) { | ||
static jclass INDEX_INPUT_WITH_BUFFER_CLASS = | ||
jni_interface->FindClassFromJNIEnv(env, "org/opensearch/knn/index/store/IndexInputWithBuffer"); | ||
return INDEX_INPUT_WITH_BUFFER_CLASS; | ||
} | ||
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static jmethodID getCopyBytesMethod(JNIUtilInterface *jni_interface, JNIEnv *env) { | ||
static jmethodID COPY_METHOD_ID = | ||
jni_interface->GetMethodID(env, getIndexInputWithBufferClass(jni_interface, env), "copyBytes", "(J)I"); | ||
return COPY_METHOD_ID; | ||
} | ||
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static jmethodID getRemainingBytesMethod(JNIUtilInterface *jni_interface, JNIEnv *env) { | ||
static jmethodID COPY_METHOD_ID = | ||
jni_interface->GetMethodID(env, getIndexInputWithBufferClass(jni_interface, env), "remainingBytes", "()J"); | ||
return COPY_METHOD_ID; | ||
} | ||
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static jfieldID getBufferFieldId(JNIUtilInterface *jni_interface, JNIEnv *env) { | ||
static jfieldID BUFFER_FIELD_ID = | ||
jni_interface->GetFieldID(env, getIndexInputWithBufferClass(jni_interface, env), "buffer", "[B"); | ||
return BUFFER_FIELD_ID; | ||
} | ||
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JNIUtilInterface *jni_interface; | ||
JNIEnv *env; | ||
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// `IndexInputWithBuffer` instance having `IndexInput` instance obtained from `Directory` for reading. | ||
jobject indexInput; | ||
jbyteArray bufferArray; | ||
jmethodID copyBytesMethod; | ||
jmethodID remainingBytesMethod; | ||
}; // class NativeEngineIndexInputMediator | ||
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} | ||
} | ||
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#endif //OPENSEARCH_KNN_JNI_STREAM_SUPPORT_H |
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/* | ||
* SPDX-License-Identifier: Apache-2.0 | ||
* | ||
* The OpenSearch Contributors require contributions made to | ||
* this file be licensed under the Apache-2.0 license or a | ||
* compatible open source license. | ||
* | ||
* Modifications Copyright OpenSearch Contributors. See | ||
* GitHub history for details. | ||
*/ | ||
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#ifndef OPENSEARCH_KNN_JNI_NMSLIB_STREAM_SUPPORT_H | ||
#define OPENSEARCH_KNN_JNI_NMSLIB_STREAM_SUPPORT_H | ||
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#include "native_engines_stream_support.h" | ||
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namespace knn_jni { | ||
namespace stream { | ||
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/** | ||
* NmslibIOReader implementation delegating NativeEngineIndexInputMediator to read bytes. | ||
*/ | ||
class NmslibOpenSearchIOReader final : public similarity::NmslibIOReader { | ||
public: | ||
explicit NmslibOpenSearchIOReader(NativeEngineIndexInputMediator *_mediator) | ||
: mediator(_mediator) { | ||
} | ||
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void read(char *bytes, size_t len) final { | ||
if (len > 0) { | ||
// Mediator calls IndexInput, then copy read bytes to `ptr`. | ||
mediator->copyBytes(len, (uint8_t *) bytes); | ||
} | ||
} | ||
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size_t remainingBytes() final { | ||
return mediator->remainingBytes(); | ||
} | ||
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private: | ||
NativeEngineIndexInputMediator *mediator; | ||
}; // class NmslibOpenSearchIOReader | ||
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} | ||
} | ||
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#endif //OPENSEARCH_KNN_JNI_NMSLIB_STREAM_SUPPORT_H |
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