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Spectre slows down when Linux kjournald process is active.

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willyboy19

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linux kjournald

When running Spectre under Linux 7.3, I found that when the simulation is large, the 'kjournald' process starts to take over 70% of CPU time, which siginficantly slows down the actual simulation. I can not kill it even trying as root.

Can anyone tell me what is this process doing and how to avoid/kill it so that the simulation can run 4x faster?
 

linux kjournald process

Thats the EXT3 filesystem journelling daemon. May be your simulation tries to write things in disk and access them immedately. So may be you can change the filesystem from EXT3 to EXT2. But it will increase the probility of file corruption on power failure.

Also check whether your disk is using DMA modes. UDMA will be better. If not try to upgrade.
 

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