| 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¶
bytes_done
number of bytes transferred
hw_segments
number of segments after physical and DMA remapping
hardware coalescing is performed
rw
binary trace for read/write request
idx
offset into the bio vector array
name
name of the probe point
devname
block device name
error
0 on success
ino
i-node number of the mapped file
phys_segments
number of segments in this bio after physical address
coalescing is performed.
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
opf
operations and flags
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
size
total size in bytes
CONTEXT¶
The process signals the transfer is done.
SEE ALSO0¶
tapset::ioblock(3stap)
| November 2023 | SystemTap Tapset Reference |