multithreaded tesseract causes Linux crash about tesseract HOT 5 CLOSED

Typically such crashes occur on hardware with an insufficient power supply (often notebooks). Multithreaded Tesseract will make heavy use of all available AVX2 units which require more power than other CPU instructions.

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Try running several single-threaded tesseract processes in parallel to use all CPU cores. Maybe that also causes a Linux crash when all processes use AVX2 at the same time. You can also try OMP_THREAD_LIMIT=2 or OMP_THREAD_LIMIT=3 to use multithreading with only some of the available AVX2 units.

from tesseract.

See also issue #2064.

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Hi @stweil - thanks for the feedback. I doubt it's power, the machine is a desktop with plenty of power capacity, and runs severe loads without problem - but difficult to diagnose as machine crashes don't leave any traces. I was thinking bug in libraries for graphics processor ... ?

from tesseract.

Even with plenty of power the machine might have a mainboard which does not deliver that power to the CPU.

Tesseract uses its own code for AVX2, no external library. You could use that code for a local test.

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