random Dump info related to random offset generation
parse Dump info related to option matching and parsing
diskutil Dump info related to disk utilization updates
+ job:x Dump info only related to job number x
? or help Show available debug options.
You can specify as many as you want, eg --debug=file,mem will enable
psync for regular pread/pwrite io, vsync for regular
readv/writev (with queuing emulation) mmap for mmap'ed
io, syslet-rw for syslet driven read/write, splice for
- using splice/vmsplice, sgio for direct SG_IO io, net
- for network io, or cpuio for a cycler burner load. sgio
+ using splice/vmsplice, sg for direct SG_IO io, net
+ for network io, or cpuio for a cycler burner load. sg
only works on Linux on SCSI (or SCSI-like devices, such
as usb-storage or sata/libata driven) devices. Fio also
has a null io engine, which is mainly used for testing