Scroll to navigation

PROBE::IOBLOCK.END(3stap) IO Scheduler and block IO Taps PROBE::IOBLOCK.END(3stap)

NAME

probe::ioblock.end - Fires whenever a block I/O transfer is complete.

SYNOPSIS

ioblock.end

VALUES

devname
block device name
phys_segments
number of segments in this bio after physical address coalescing is performed.
error
0 on success
sector
beginning sector for the entire bio
vcnt
bio vector count which represents number of array element (page, offset, length) which makes up this I/O request
name
name of the probe point
flags
see below BIO_UPTODATE 0 ok after I/O completion BIO_RW_BLOCK 1 RW_AHEAD set, and read/write would block BIO_EOF 2 out-out-bounds error BIO_SEG_VALID 3 nr_hw_seg valid BIO_CLONED 4 doesn't own data BIO_BOUNCED 5 bio is a bounce bio BIO_USER_MAPPED 6 contains user pages BIO_EOPNOTSUPP 7 not supported
size
total size in bytes
rw
binary trace for read/write request
idx
offset into the bio vector array
ino
i-node number of the mapped file
bytes_done
number of bytes transferred
hw_segments
number of segments after physical and DMA remapping hardware coalescing is performed

CONTEXT

The process signals the transfer is done.

SEE ALSO0

tapset::ioblock(3stap)
March 2016 SystemTap Tapset Reference