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[Tutorials] Fix uhi test timeouts in matplotlib. #20166

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Oct 24, 2025
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[Tutorials] Fix uhi test timeouts in matplotlib. #20166

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5 changes: 3 additions & 2 deletions tutorials/CMakeLists.txt
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Expand Up @@ -37,11 +37,12 @@ else() # testing using an installation
enable_testing()
endif()

# Set the environment for the tutorials, which is the eventual ROOT_environ
# - Set the environment for the tutorials, which is the eventual ROOT_environ
# plus some environment variables related to limiting the number of threads
# used by NumPy.
# See: https://stackoverflow.com/questions/30791550/limit-number-of-threads-in-numpy
set(TUTORIAL_ENV ${ROOT_environ} OMP_NUM_THREADS=1 OPENBLAS_NUM_THREADS=1 MKL_NUM_THREADS=1)
# - For matplotlib, disable a blocking event loop on show() using a non-interactive backend
set(TUTORIAL_ENV ${ROOT_environ} OMP_NUM_THREADS=1 OPENBLAS_NUM_THREADS=1 MKL_NUM_THREADS=1 MPLBACKEND=AGG)

#---Copy the CTestCustom.cmake file into the build directory--------
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/CTestCustom.cmake ${CMAKE_CURRENT_BINARY_DIR} COPYONLY)
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