oneDNN + MKL

[graemenail]

TODO

• Manual check of training / scoring

Description

Adds oneDNN. This PR should enable a completely open-source compilations of Marian.

In contrast to #937, this PR also allows MKL-based builds. When compiled with -DUSE_DNNL=ON, oneDNN is used for sgemm, even if -DUSE_MKL=ON is requested.

This PR also includes a caching of boost, and a cleaning of the debug build directory. These can be broken off into a separate PR if necessary. During testing, windows builds would fail from running out of space building both debug and release. Since disabling oneDNN JIT profiling the build sizes are smaller.

Related: marian-nmt/marian-regression-tests#86
Closes: #706
Supersedes: #937

List of changes:

• Adds oneDNN as a submodule
• Use oneDNN for sgemm
• MKL has been retained for backwards compatibility
• LSH (with rotation) now explicitly requires MKL. This is to avoid silently falling back to less performant codepaths. To document, BLAS_FOUND is sufficient here and the MKL_FOUND condition could be omitted by a user expecting a performance degradation.

Added dependencies: Intel oneDNN

How to test

Ran the 1 million sentence testset of WNGT21 through the MKL and oneDNN versions.

The static binaries are now larger.

Regression test results

Skipped:
- tests/server/test_ende_cpu.sh
Failed:
- tests/decoder/intgemm/test_intgemm_16bit.sh
- tests/decoder/intgemm/test_intgemm_16bit_avx2.sh
- tests/decoder/intgemm/test_intgemm_16bit_sse2.sh
- tests/decoder/intgemm/test_intgemm_8bit.sh
- tests/decoder/intgemm/test_intgemm_8bit_avx2.sh
- tests/decoder/intgemm/test_intgemm_8bit_ssse3.sh
- tests/models/wngt19/test_model_base_fbgemm_packed8.sh
Logs:
- /home/gnail/projects/mkl-onednn/marian-dev/regression-tests/tests/decoder/intgemm/test_intgemm_16bit.sh.log
- /home/gnail/projects/mkl-onednn/marian-dev/regression-tests/tests/decoder/intgemm/test_intgemm_16bit_avx2.sh.log
- /home/gnail/projects/mkl-onednn/marian-dev/regression-tests/tests/decoder/intgemm/test_intgemm_16bit_sse2.sh.log
- /home/gnail/projects/mkl-onednn/marian-dev/regression-tests/tests/decoder/intgemm/test_intgemm_8bit.sh.log
- /home/gnail/projects/mkl-onednn/marian-dev/regression-tests/tests/decoder/intgemm/test_intgemm_8bit_avx2.sh.log
- /home/gnail/projects/mkl-onednn/marian-dev/regression-tests/tests/decoder/intgemm/test_intgemm_8bit_ssse3.sh.log
- /home/gnail/projects/mkl-onednn/marian-dev/regression-tests/tests/models/wngt19/test_model_base_fbgemm_packed8.sh.log
---------------------
Ran 19 tests in 00:00:0.000s, 11 passed, 1 skipped, 7 failed
FAILED

Checklist

• I have tested the code manually
• I have run regression tests
• I have read and followed CONTRIBUTING.md
• I have updated CHANGELOG.md