$ strace -p ${PID} -T -ttt -f 2> >(grep -v epoll_wait)The above command is the same as:
$ strace -p ${PID} -T -ttt -f 2> /tmp/stderr.out
$ grep -v epoll_wait /tmp/stderr.out
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January 8, 2021 05:29
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grep standard error stream
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