Not utilising AVX2 instructions after compilation from sources

System information

• OS Platform and Distribution: Linux Ubuntu 20.04
• TensorFlow installed from (source or binary): built via "mvn install"
• TensorFlow version: 2.3 (using 0.2.0-SNAPSHOT)
• Python version: 3.8.2
• Bazel version (if compiling from source): 3.4.1
• GCC/Compiler version (if compiling from source): 9.3.0

Problem:

I have been using TF 1.15 from original java TF repository

<dependency>
    <groupId>org.tensorflow</groupId>
    <artifactId>tensorflow</artifactId>
    <version>1.15.0</version>
</dependency>

which gave me this output:

I tensorflow/core/platform/cpu_feature_guard.cc:142] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2 FMA
I tensorflow/core/platform/profile_utils/cpu_utils.cc:94] CPU Frequency: 2494460000 Hz
I tensorflow/compiler/xla/service/service.cc:168] XLA service 0x7f77250299d0 initialized for platform Host (this does not guarantee that XLA will be used). Devices:
I tensorflow/compiler/xla/service/service.cc:176] StreamExecutor device (0): Host, Default Version

so found out this repo, made environment to be able to build TF from sources, ran mvn install command which, I would assume, compiled TF on my specific platform. Using dependencies in my project:

<dependency>
    <groupId>org.tensorflow</groupId>
    <artifactId>tensorflow-core-api</artifactId>
    <version>0.2.0-SNAPSHOT</version>
</dependency>
<dependency>
    <groupId>org.tensorflow</groupId>
    <artifactId>tensorflow-core-api</artifactId>
    <version>0.2.0-SNAPSHOT</version>
    <classifier>linux-x86_64</classifier>
</dependency>

getting output:

Warning: Could not load Loader: java.lang.UnsatisfiedLinkError: no jnijavacpp in java.library.path: [/usr/java/packages/lib, /usr/lib64, /lib64, /lib, /usr/lib]
Warning: Could not load Pointer: java.lang.UnsatisfiedLinkError: no jnijavacpp in java.library.path: [/usr/java/packages/lib, /usr/lib64, /lib64, /lib, /usr/lib]
Warning: Could not load BytePointer: java.lang.UnsatisfiedLinkError: no jnijavacpp in java.library.path: [/usr/java/packages/lib, /usr/lib64, /lib64, /lib, /usr/lib]
I external/org_tensorflow/tensorflow/core/platform/cpu_feature_guard.cc:142] This TensorFlow binary is optimized with oneAPI Deep Neural Network Library (oneDNN)to use the following CPU instructions in performance-critical operations: AVX2 FMA
To enable them in other operations, rebuild TensorFlow with the appropriate compiler flags.
Warning: Could not load PointerPointer: java.lang.UnsatisfiedLinkError: no jnijavacpp in java.library.path: [/usr/java/packages/lib, /usr/lib64, /lib64, /lib, /usr/lib]

Everything somehow runs, but throughput is about the same as generic 1.15 version and latency is about 2 times worse than the previous version using the same TF model with V1 behavior enabled. Not sure how to enable AVX2 FMA instructions when TF clearly founds them. I suppose it has something to do about missing jnijavacpp library. Could anyone help me, please?

Thanks

Non sono indicati file sorgente o test. Inizia riproducendo la build di Ubuntu 20.04 con mvn install, quindi esamina gli avvisi sul caricamento della libreria nativa e il messaggio AVX2/FMA segnalato. Il lavoro sarà completo quando sarà stato identificato il motivo per cui il pacchetto Java compilato non corrisponde alle prestazioni attese e la correzione sarà stata documentata o verificata con misurazioni comparabili di throughput e latenza.