I/O sniffing
From Linuxintro
Revision as of 06:13, 25 May 2013 by imported>ThorstenStaerk
You can do I/O sniffing using the command blktrace. blktrace will show you every request that goes to the disk.
Example:
# blktrace -d /dev/sdg -o - | blkparse -i - [...] 8,96 7 106 0.373952974 11364 D W 0 + 8 [kworker/7:2] 8,96 7 107 0.374456639 47 C W 0 + 8 [0]
The RWBS(D) field can be a combination of
R : Read W : Write D : Block discard B : Barrier operation S : Synchronous operations
