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Does it actually matter for a real-life=0D > use-case, or is it just the test being too strict ?=0D =0D It tests getrusage(RUSAGE_CHILDREN).ru_maxrss:=0D =0D https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/sysc= alls/getrusage/getrusage03.c=0D =0D I am not sure about a real-world use-case; I do not have one.=0D =0D > What is the overhead impact of your change from approximated counter=0D > read to a precise sum on this /proc ABI ?=0D =0D I have not benchmarked the overhead yet. I will get back on this. =0D =0D Thanks,=0D Nirmoy=0D