Two luajit processes hungs system out

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Feb 28, 2018, 8:09:27 AM2/28/18

to torch7

Hi all,

I wrote some small script to test image pre-processing speed

When I run it:

$ th torch_speed_test.lua

Started

Upload elapsed time: 11.26

But if I try to run 2 instances simultaniously it runs near forever:

$ th torch_speed_test.lua &th torch_speed_test.lua

[1] 65412

Started

Upload elapsed time: 573.83

Upload elapsed time: 574.72

[1]+ Done th torch_speed_test.lua

Is it normal behaviour for torch7/luajit?

In both cases CPU load is 100% for all cores (I have 8-cores CPU)

Why difference is so big?

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Feb 28, 2018, 8:31:48 AM2/28/18

to torch7

problem addressed:

Issue is due to conflict of openblas multithreading with program multiprocessing

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