How to read and interpret /dev/cpu_dma_latency?

Solution Verified - Updated -


  • Reading /dev/cpu_dma_latency from userspace / user mode is not clarified in kernel sources in 'Documentation/power/pm_qos_interface.txt'

  • reading /dev/cpu_dma_latency prints gibberish

# cat /dev/cpu_dma_latency


Red Hat Enterprise Linux 7

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