KTRDUMP(8)              FreeBSD System Manager's Manual             KTRDUMP(8)

NAME
     ktrdump - print kernel ktr trace buffer

SYNOPSIS
     ktrdump [-cflqrtH] [-i ktrfile] [-M core] [-N system] [-o outfile]

DESCRIPTION
     The ktrdump utility is used to dump the contents of the kernel ktr trace
     buffer.

     The following options are available:

     -c                Print the CPU number that each entry was logged from.

     -l                Poll the kernel ktr trace buffer periodically dumping
                       any new events after each poll.

     -f                Print the file and line number that each entry was
                       logged from.

     -q                Quiet mode; do not print the column header.

     -r                Print relative timestamps rather than absolute
                       timestamps.

     -t                Print the timestamp for each entry.

     -H                Print the thread ID for each entry.

     -i ktrfile        File containing saved ktr trace events; for more
                       information see the ktr(4) manual page.

     -N system         The kernel image to resolve symbols from.  The default
                       is the value returned via getbootfile(3).

     -M core           The core file or memory image to read from.  The
                       default is /dev/mem.

     -o outfile        The file to write the output to.  The default is
                       standard output.

SEE ALSO
     ktr(4), ktr(9)

HISTORY
     The ktrdump utility first appeared in FreeBSD 5.0.

AUTHORS
     The ktrdump utility was implemented by Jake Burkholder
     <jake@FreeBSD.org>.

     This manual page was written by Chad David <davidc@FreeBSD.org>.

FreeBSD 13.1-RELEASE-p6        October 22, 2018        FreeBSD 13.1-RELEASE-p6