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| author | Even Rouault <even.rouault@spatialys.com> | 2020-04-30 11:52:42 +0200 |
|---|---|---|
| committer | Even Rouault <even.rouault@spatialys.com> | 2020-05-20 20:30:21 +0200 |
| commit | 07d1f775a1ef95496b0c78b18f671dac41983320 (patch) | |
| tree | 6e69f9d1e92244c2fc1ec4d3b9b4975e7b37b6c4 /CMakeLists.txt | |
| parent | 97eb7e0bf17b476d516262e0af462ec7eeb8f505 (diff) | |
Add multithreaded support in the DWT encoder.
Update the bench_dwt utility to have a -decode/-encode switch
Measured performance gains for DWT encoder on a
Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz (4 cores, hyper threaded)
Encoding time:
$ ./bin/bench_dwt -encode -num_threads 1
time for dwt_encode: total = 8.348 s, wallclock = 8.352 s
$ ./bin/bench_dwt -encode -num_threads 2
time for dwt_encode: total = 9.776 s, wallclock = 4.904 s
$ ./bin/bench_dwt -encode -num_threads 4
time for dwt_encode: total = 13.188 s, wallclock = 3.310 s
$ ./bin/bench_dwt -encode -num_threads 8
time for dwt_encode: total = 30.024 s, wallclock = 4.064 s
Scaling is probably limited by memory access patterns causing
memory access to be the bottleneck.
The slightly worse results with threads==8 than with thread==4
is due to hyperthreading being not appropriate here.
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 3ea2424a..050264a7 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -256,7 +256,9 @@ if(BUILD_JPIP_SERVER) endif() add_subdirectory(src/lib) option(BUILD_LUTS_GENERATOR "Build utility to generate t1_luts.h" OFF) +if(UNIX) option(BUILD_UNIT_TESTS "Build unit tests (bench_dwt, test_sparse_array, etc..)" OFF) +endif() #----------------------------------------------------------------------------- # Build Applications |