diff options
Diffstat (limited to 'tapset/ioblock.stp')
| -rw-r--r-- | tapset/ioblock.stp | 214 |
1 files changed, 167 insertions, 47 deletions
diff --git a/tapset/ioblock.stp b/tapset/ioblock.stp index bc64c425..761e7df7 100644 --- a/tapset/ioblock.stp +++ b/tapset/ioblock.stp @@ -78,18 +78,13 @@ function __bio_devname:string(bio:long) global BIO_READ = 0, BIO_WRITE = 1 -/* probe ioblock.request +/** + * probe ioblock.request - Fires whenever making a generic block I/O request. * - * Fires whenever making a generic block I/O request. - * - * Context: - * The process makes block I/O request - * - * Variables: - * devname - block device name - * ino - i-node number of the mapped file - * sector - beginning sector for the entire bio - * flags - see below + * @devname - block device name + * @ino - i-node number of the mapped file + * @sector - beginning sector for the entire bio + * @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 @@ -99,20 +94,18 @@ global BIO_READ = 0, BIO_WRITE = 1 * BIO_USER_MAPPED 6 contains user pages * BIO_EOPNOTSUPP 7 not supported * - * rw - binary trace for read/write request - * vcnt - bio vector count which represents number of array element (page, - * offset, length) which make up this I/O request - * idx - offset into the bio vector array - * phys_segments - number of segments in this bio after physical address - * coalescing is performed. - * hw_segments - number of segments after physical and DMA remapping - * hardware coalescing is performed - * size - total size in bytes - * bdev - target block device - * bdev_contains - points to the device object which contains the - * partition (when bio structure represents a partition) - * p_start_sect - points to the start sector of the partition - * structure of the device + * @rw - binary trace for read/write request + * @vcnt - bio vector count which represents number of array element (page, offset, length) which make up this I/O request + * @idx - offset into the bio vector array + * @phys_segments - number of segments in this bio after physical address coalescing is performed + * @hw_segments - number of segments after physical and DMA remapping hardware coalescing is performed + * @size - total size in bytes + * @bdev - target block device + * @bdev_contains - points to the device object which contains the partition (when bio structure represents a partition) + * @p_start_sect - points to the start sector of the partition structure of the device + * + * Context: + * The process makes block I/O request */ probe ioblock.request = kernel.function ("generic_make_request") { @@ -135,19 +128,14 @@ probe ioblock.request = kernel.function ("generic_make_request") p_start_sect = __bio_start_sect($bio) } -/* probe ioblock.end - * - * Fires whenever a block I/O transfer is complete. - * - * Context: - * The process signals the transfer is done. +/** + * probe ioblock.end - Fires whenever a block I/O transfer is complete. * - * Variables: - * devname - block device name - * ino - i-node number of the mapped file - * byte_done - number of bytes transferred - * sector - beginning sector for the entire bio - * flags - see below + * @devname - block device name + * @ino - i-node number of the mapped file + * @bytes_done - number of bytes transferred + * @sector - beginning sector for the entire bio + * @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 @@ -156,16 +144,16 @@ probe ioblock.request = kernel.function ("generic_make_request") * BIO_BOUNCED 5 bio is a bounce bio * BIO_USER_MAPPED 6 contains user pages * BIO_EOPNOTSUPP 7 not supported - * error - 0 on success - * rw - binary trace for read/write request - * vcnt - bio vector count which represents number of array element (page, - * offset, length) which makes up this I/O request - * idx - offset into the bio vector array - * phys_segments - number of segments in this bio after physical address - * coalescing is performed. - * hw_segments - number of segments after physical and DMA remapping - * hardware coalescing is performed - * size - total size in bytes + * @error - 0 on success + * @rw - binary trace for read/write request + * @vcnt - bio vector count which represents number of array element (page, offset, length) which makes up this I/O request + * @idx - offset into the bio vector array + * @phys_segments - number of segments in this bio after physical address coalescing is performed. + * @hw_segments - number of segments after physical and DMA remapping hardware coalescing is performed + * @size - total size in bytes + * + * Context: + * The process signals the transfer is done. */ probe ioblock.end = kernel.function("bio_endio") { @@ -186,3 +174,135 @@ probe ioblock.end = kernel.function("bio_endio") %) size = $bio->bi_size } + +/** + * probe ioblock_trace.bounce - Fires whenever a buffer bounce is needed for at least one page of a block IO request. + * + * @devname device for which a buffer bounce was needed. + * @ino - i-node number of the mapped file + * @bytes_done - number of bytes transferred + * @sector - beginning sector for the entire bio + * @flags - see below + * BIO_UPTODATE 0 ok after I/O completion + * BIO_RW_BLOCK 1 RW_AHEAD set, and read/write would block + * BIO_EOF 2 out-out-bounds error + * BIO_SEG_VALID 3 nr_hw_seg valid + * BIO_CLONED 4 doesn't own data + * BIO_BOUNCED 5 bio is a bounce bio + * BIO_USER_MAPPED 6 contains user pages + * BIO_EOPNOTSUPP 7 not supported + * @rw - binary trace for read/write request + * @vcnt - bio vector count which represents number of array element (page, offset, length) which makes up this I/O request + * @idx - offset into the bio vector array + * @phys_segments - number of segments in this bio after physical address coalescing is performed. + * @size - total size in bytes + * + * Context : + * The process creating a block IO request. + */ +probe ioblock_trace.bounce = kernel.trace("block_bio_bounce") +{ + devname = __bio_devname($bio) + ino = __bio_ino($bio) + + bytes_done = $bio->bi_size + sector = $bio->bi_sector + flags = $bio->bi_flags + rw = $bio->bi_rw + vcnt = $bio->bi_vcnt + idx = $bio->bi_idx + phys_segments = $bio->bi_phys_segments + size = $bio->bi_size +} + +/** + * probe ioblock_trace.request - Fires just as a generic block I/O request is created for a bio. + * + * @devname - block device name + * @ino - i-node number of the mapped file + * @bytes_done - number of bytes transferred + * @sector - beginning sector for the entire bio + * @flags - see below + * BIO_UPTODATE 0 ok after I/O completion + * BIO_RW_BLOCK 1 RW_AHEAD set, and read/write would block + * BIO_EOF 2 out-out-bounds error + * BIO_SEG_VALID 3 nr_hw_seg valid + * BIO_CLONED 4 doesn't own data + * BIO_BOUNCED 5 bio is a bounce bio + * BIO_USER_MAPPED 6 contains user pages + * BIO_EOPNOTSUPP 7 not supported + * + * @rw - binary trace for read/write request + * @vcnt - bio vector count which represents number of array element (page, offset, length) which make up this I/O request + * @idx - offset into the bio vector array + * @phys_segments - number of segments in this bio after physical address coalescing is performed. + * @size - total size in bytes + * @bdev - target block device + * @bdev_contains - points to the device object which contains the partition (when bio structure represents a partition) + * @p_start_sect - points to the start sector of the partition structure of the device + * + * Context: + * The process makes block I/O request + */ + +probe ioblock_trace.request = kernel.trace("block_bio_queue") +{ + devname = __bio_devname($bio) + ino = __bio_ino($bio) + + bytes_done = $bio->bi_size + sector = $bio->bi_sector + flags = $bio->bi_flags + rw = $bio->bi_rw + vcnt = $bio->bi_vcnt + idx = $bio->bi_idx + phys_segments = $bio->bi_phys_segments + size = $bio->bi_size + bdev_contains = $bio->bi_bdev->bd_contains + bdev = $bio->bi_bdev + p_start_sect = __bio_start_sect($bio) +} + +/** + * probe ioblock_trace.end - Fires whenever a block I/O transfer is complete. + * + * @q - request queue on which this bio was queued. + * @devname - block device name + * @ino - i-node number of the mapped file + * @bytes_done - number of bytes transferred + * @sector - beginning sector for the entire bio + * @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 + * + * @rw - binary trace for read/write request + * @vcnt - bio vector count which represents number of array element (page, offset, length) which makes up this I/O request + * @idx - offset into the bio vector array + * @phys_segments - number of segments in this bio after physical address coalescing is performed. + * @size - total size in bytes + * + * Context: + * The process signals the transfer is done. + */ +probe ioblock_trace.end = kernel.trace("block_bio_complete") +{ + q = $q + devname = __bio_devname($bio) + ino = __bio_ino($bio) + + bytes_done = $bio->bi_size + + sector = $bio->bi_sector + flags = $bio->bi_flags + rw = $bio->bi_rw + vcnt = $bio->bi_vcnt + idx = $bio->bi_idx + phys_segments = $bio->bi_phys_segments + size = $bio->bi_size +} |