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Rasmus Munk Larsen 7b76c85daf Vectorize and parallelize TensorScanOp. 
TensorScanOp is used in TensorFlow for a number of operations, such as cumulative logexp reduction and cumulative sum and product reductions.

The benchmarks numbers below are for cumulative row- and column reductions of NxN matrices.

name                                                         old time/op             new time/op     delta
BM_cumSumRowReduction_1T/4    [using 1 threads ]             25.1ns ± 1%             35.2ns ± 1%    +40.45%
BM_cumSumRowReduction_1T/8    [using 1 threads ]             73.4ns ± 0%             82.7ns ± 3%    +12.74%
BM_cumSumRowReduction_1T/32   [using 1 threads ]              988ns ± 0%              832ns ± 0%    -15.77%
BM_cumSumRowReduction_1T/64   [using 1 threads ]             4.07µs ± 2%             3.47µs ± 0%    -14.70%
BM_cumSumRowReduction_1T/128  [using 1 threads ]             18.0µs ± 0%             16.8µs ± 0%     -6.58%
BM_cumSumRowReduction_1T/512  [using 1 threads ]              287µs ± 0%              281µs ± 0%     -2.22%
BM_cumSumRowReduction_1T/2k   [using 1 threads ]             4.78ms ± 1%             4.78ms ± 2%       ~
BM_cumSumRowReduction_1T/10k  [using 1 threads ]              117ms ± 1%              117ms ± 1%       ~
BM_cumSumRowReduction_8T/4    [using 8 threads ]             25.0ns ± 0%             35.2ns ± 0%    +40.82%
BM_cumSumRowReduction_8T/8    [using 8 threads ]             77.2ns ±16%             81.3ns ± 0%       ~
BM_cumSumRowReduction_8T/32   [using 8 threads ]              988ns ± 0%              833ns ± 0%    -15.67%
BM_cumSumRowReduction_8T/64   [using 8 threads ]             4.08µs ± 2%             3.47µs ± 0%    -14.95%
BM_cumSumRowReduction_8T/128  [using 8 threads ]             18.0µs ± 0%             17.3µs ±10%       ~
BM_cumSumRowReduction_8T/512  [using 8 threads ]              287µs ± 0%               58µs ± 6%    -79.92%
BM_cumSumRowReduction_8T/2k   [using 8 threads ]             4.79ms ± 1%             0.64ms ± 1%    -86.58%
BM_cumSumRowReduction_8T/10k  [using 8 threads ]              117ms ± 1%               18ms ± 6%    -84.50%

BM_cumSumColReduction_1T/4    [using 1 threads ]             23.9ns ± 0%             33.4ns ± 1%    +39.68%
BM_cumSumColReduction_1T/8    [using 1 threads ]             71.6ns ± 1%             49.1ns ± 3%    -31.40%
BM_cumSumColReduction_1T/32   [using 1 threads ]              973ns ± 0%              165ns ± 2%    -83.10%
BM_cumSumColReduction_1T/64   [using 1 threads ]             4.06µs ± 1%             0.57µs ± 1%    -85.94%
BM_cumSumColReduction_1T/128  [using 1 threads ]             33.4µs ± 1%              4.1µs ± 1%    -87.67%
BM_cumSumColReduction_1T/512  [using 1 threads ]             1.72ms ± 4%             0.21ms ± 5%    -87.91%
BM_cumSumColReduction_1T/2k   [using 1 threads ]              119ms ±53%               11ms ±35%    -90.42%
BM_cumSumColReduction_1T/10k  [using 1 threads ]              1.59s ±67%              0.35s ±49%    -77.96%
BM_cumSumColReduction_8T/4    [using 8 threads ]             23.8ns ± 0%             33.3ns ± 0%    +40.06%
BM_cumSumColReduction_8T/8    [using 8 threads ]             71.6ns ± 1%             49.2ns ± 5%    -31.33%
BM_cumSumColReduction_8T/32   [using 8 threads ]             1.01µs ±12%             0.17µs ± 3%    -82.93%
BM_cumSumColReduction_8T/64   [using 8 threads ]             4.15µs ± 4%             0.58µs ± 1%    -86.09%
BM_cumSumColReduction_8T/128  [using 8 threads ]             33.5µs ± 0%              4.1µs ± 4%    -87.65%
BM_cumSumColReduction_8T/512  [using 8 threads ]             1.71ms ± 3%             0.06ms ±16%    -96.21%
BM_cumSumColReduction_8T/2k   [using 8 threads ]             97.1ms ±14%              3.0ms ±23%    -96.88%
BM_cumSumColReduction_8T/10k  [using 8 threads ]              1.97s ± 8%              0.06s ± 2%    -96.74%
2020-05-05 00:19:43 +00:00
bench Fix perf monitoring merge function 2020-04-28 17:02:59 +00:00
blas STYLE: Remove CMake-language block-end command arguments 2019-10-31 11:36:27 -05:00
cmake [SYCL] Rebasing the SYCL support branch on top of the Einge upstream master branch. 2019-11-28 10:08:54 +00:00
debug MIsc. source and comment typos 2018-03-11 10:01:44 -04:00
demos Make file formatting comply with POSIX and Unix standards 2020-03-23 18:09:02 +00:00
doc Update PreprocessorDirectives.dox - Added line for the new VectorwiseOp plugin directive (and re-alphabatized the plugin section) 2020-04-17 21:43:37 +00:00
Eigen Fix confusing template param name for Stride fwd decl. 2020-04-30 01:43:05 +00:00
failtest Make file formatting comply with POSIX and Unix standards 2020-03-23 18:09:02 +00:00
lapack STYLE: Convert CMake-language commands to lower case 2019-10-31 11:36:37 -05:00
scripts Replace calls to "hg" by calls to "git" 2019-12-04 11:24:06 +01:00
test Extend support for Packet16b: 2020-04-28 16:12:47 +00:00
unsupported Vectorize and parallelize TensorScanOp. 2020-05-05 00:19:43 +00:00
.gitignore Renamed .hgignore to .gitignore (removing hg-specific "syntax" line) 2019-12-13 19:40:57 +01:00
.hgeol Added a pattern which forces LF line endings for *.sh files. 2013-07-31 18:20:58 +02:00
CMakeLists.txt Don't restrict CMAKE_BUILD_TYPE 2020-02-28 20:46:53 +00:00
COPYING.BSD Make file formatting comply with POSIX and Unix standards 2020-03-23 18:09:02 +00:00
COPYING.GPL there's no reason why we should follow the FSF's stupid recommendation for the naming of these files, right? This could give the wrong impression that Eigen is only GPL-licensed. 2009-11-14 23:26:07 -05:00
COPYING.LGPL Replace COPYING.LGPL by a copy of the LGPL 2.1 (instead of LGPL 3). 2012-09-10 13:27:44 -04:00
COPYING.MINPACK Make file formatting comply with POSIX and Unix standards 2020-03-23 18:09:02 +00:00
COPYING.MPL2 add COPYING.MPL2 2012-07-15 10:20:59 -04:00
COPYING.README Replace COPYING.LGPL by a copy of the LGPL 2.1 (instead of LGPL 3). 2012-09-10 13:27:44 -04:00
CTestConfig.cmake STYLE: Convert CMake-language commands to lower case 2019-10-31 11:36:37 -05:00
CTestCustom.cmake.in Allow to filter out build-error messages 2018-07-24 20:12:49 +02:00
eigen3.pc.in Further fixes for CMAKE_INSTALL_PREFIX correctness 2015-11-07 21:29:24 -05:00
INSTALL finally, the right fix: set CTEST_BUILD_TARGET. 2009-10-04 20:27:44 -04:00
README.md Update old links to bitbucket to point to gitlab.com 2019-12-04 10:57:07 +01:00
signature_of_eigen3_matrix_library improve the scripts for building unit tests: 2009-11-25 21:26:37 -05:00

README.md

Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.

For more information go to http://eigen.tuxfamily.org/.

For pull request, bug reports, and feature requests, go to https://gitlab.com/libeigen/eigen.