kdump(1) - NetBSD Manual Pages

KDUMP(1)                NetBSD General Commands Manual                KDUMP(1)


NAME
kdump -- display kernel trace data
SYNOPSIS
kdump [-dlNnRT] [-e emulation] [-f file] [-m maxdata] [-p pid] [-t trstr] [-x | -X size] [file]
DESCRIPTION
kdump displays the kernel trace files produced with ktrace(1) in human readable format. The file ktrace.out in the current directory is dis- played, unless either the -f option is used, or a file name is supplied as the last argument. The options are as follows: -d Display all numbers in decimal. -e emulation If an emulation of a process is unknown, interpret system call maps assuming the named emulation instead of default "netbsd". -f file Display the specified file instead of ktrace.out. -l Loop reading the trace file, once the end-of-file is reached, waiting for more data. -m maxdata Display at most maxdata bytes when decoding I/O. -N Suppress system call number-to-name translation. -n Suppress ad hoc translations. Normally kdump tries to decode many system calls into a more human readable format. For example, ioctl(2) values are replaced with the macro name and errno values are replaced with the strerror(3) string. Sup- pressing this feature yields a more consistent output format and is easily amenable to further processing. -p pid Only display records from the trace file that are for the indicated pid. -R Display relative timestamps (time since previous entry). -T Display absolute timestamps for each entry (seconds since epoch). -t trstr Restrict display to the specified set of kernel trace points. The default is to display everything in the file. See the -t option of ktrace(1). -x Display GIO data in hex and ascii instead of vis(3) format. -X size Same as -x but display hex values by groups of size bytes. Supported values are 1, 2, 4, 8, and 16.
SEE ALSO
ktrace(1)
HISTORY
The kdump command appears in 4.4BSD. NetBSD 7.1_STABLE November 15, 2003 NetBSD 7.1_STABLE

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