1PROBE::IOBLOCK.END(3stap)IO Scheduler and block IO TapsPROBE::IOBLOCK.END(3stap)
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6 probe::ioblock.end - Fires whenever a block I/O transfer is complete.
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9 ioblock.end
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12 rw
13 binary trace for read/write request
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15 error
16 0 on success
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18 phys_segments
19 number of segments in this bio after physical address coalescing is
20 performed.
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22 name
23 name of the probe point
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25 opf
26 operations and flags
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28 sector
29 beginning sector for the entire bio
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31 ino
32 i-node number of the mapped file
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34 devname
35 block device name
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37 hw_segments
38 number of segments after physical and DMA remapping hardware
39 coalescing is performed
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41 flags
42 see below BIO_UPTODATE 0 ok after I/O completion BIO_RW_BLOCK 1
43 RW_AHEAD set, and read/write would block BIO_EOF 2 out-out-bounds
44 error BIO_SEG_VALID 3 nr_hw_seg valid BIO_CLONED 4 doesn't own data
45 BIO_BOUNCED 5 bio is a bounce bio BIO_USER_MAPPED 6 contains user
46 pages BIO_EOPNOTSUPP 7 not supported
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48 vcnt
49 bio vector count which represents number of array element (page,
50 offset, length) which makes up this I/O request
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52 bytes_done
53 number of bytes transferred
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55 idx
56 offset into the bio vector array
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58 size
59 total size in bytes
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62 The process signals the transfer is done.
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65 tapset::ioblock(3stap)
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69SystemTap Tapset Reference November 2019 PROBE::IOBLOCK.END(3stap)