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@evansus
Created June 4, 2014 01:17
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Results from dtrace off-cpu profiling
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`__dbuf_hold_impl+0x35c
zfs`dbuf_hold_impl+0x8c
zfs`dbuf_hold+0x32
zfs`dmu_buf_hold_array_by_dnode+0x206
zfs`dmu_buf_hold_array+0x9e
zfs`dmu_read_iokit+0x78
zfs`zvol_read_iokit+0x17f
zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xbd
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`cluster_pagein_ext+0x145
mach_kernel`cluster_pagein+0x25
mach_kernel`hfs_vnop_pagein+0x8b
mach_kernel`VNOP_PAGEIN+0x57
mach_kernel`vnode_pagein+0x339
mach_kernel`vm_swapfile_io+0xb6
mach_kernel`vm_swap_get+0xac
mach_kernel`c_seg_swapin+0xc8
mach_kernel`0xffffff8020a70250+0x14f
mach_kernel`vm_compressor_get+0x4b
mach_kernel`vm_compressor_pager_get+0xb6
mach_kernel`vm_fault_page+0xf8a
mach_kernel`vm_fault+0xa64
mach_kernel`user_trap+0x2ec
mach_kernel`hndl_alltraps+0xdb
2520 13069
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`dmu_buf_hold_array_by_dnode+0x271
zfs`dmu_buf_hold_array+0x9e
zfs`dmu_read_iokit+0x78
zfs`zvol_read_iokit+0x17f
zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xbd
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bc7520+0x8c
mach_kernel`buf_meta_bread+0x17
mach_kernel`GetBTreeBlock+0xb2
mach_kernel`GetNode+0x2c
mach_kernel`SearchTree+0x73
mach_kernel`BTDeleteRecord+0x8b
mach_kernel`cat_rename+0x7f4
mach_kernel`hfs_removefile+0x7ad
mach_kernel`hfs_vnop_rename+0x1441
mach_kernel`VNOP_RENAME+0x67
mach_kernel`vn_rename+0x371
mach_kernel`rename+0x6e0
mach_kernel`unix_syscall64+0x1f3
mach_kernel`hndl_unix_scall64+0x16
673687 13394
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`__dbuf_hold_impl+0x35c
zfs`dbuf_hold_impl+0x8c
zfs`dbuf_hold+0x32
zfs`dmu_buf_hold_array_by_dnode+0x206
zfs`dmu_read+0x1a7
zfs`space_map_load+0x217
zfs`metaslab_activate+0xe1
zfs`metaslab_group_alloc+0x4c3
zfs`metaslab_alloc_dva+0x455
zfs`metaslab_alloc+0xe4
zfs`zio_dva_allocate+0x13e
zfs`__zio_execute+0x12a
zfs`zio_execute+0x15
spl`taskq_thread+0xc7
mach_kernel`call_continuation+0x17
378 14049
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`dmu_buf_hold_array_by_dnode+0x271
zfs`dmu_read+0x1a7
zfs`space_map_load+0x217
zfs`metaslab_activate+0xe1
zfs`metaslab_group_alloc+0x4c3
zfs`metaslab_alloc_dva+0x455
zfs`metaslab_alloc+0xe4
zfs`zio_dva_allocate+0x13e
zfs`__zio_execute+0x12a
zfs`zio_execute+0x15
spl`taskq_thread+0xc7
mach_kernel`call_continuation+0x17
378 14510
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_prefetch+0x59b
zfs`dmu_zfetch_fetch+0x58
zfs`dmu_zfetch_dofetch+0x1d0
zfs`dmu_zfetch_find+0x80d
zfs`dmu_zfetch+0x11f
zfs`dbuf_read+0x28a
zfs`dmu_buf_hold_array_by_dnode+0x271
zfs`dmu_buf_hold_array+0x9e
zfs`dmu_read_iokit+0x78
zfs`zvol_read_iokit+0x17f
zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xbd
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`0xffffff8020bd0c30+0x957
mach_kernel`cluster_read_ext+0x13b5
mach_kernel`hfs_vnop_read+0x236
mach_kernel`VNOP_READ+0xe1
mach_kernel`0xffffff8020bf37e0+0xf5
mach_kernel`0xffffff8020df1c50+0xae
mach_kernel`pread_nocancel+0x89
mach_kernel`unix_syscall64+0x1f3
mach_kernel`hndl_unix_scall64+0x16
3670 14918
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`__dbuf_hold_impl+0x35c
zfs`dbuf_hold_impl+0x8c
zfs`dbuf_hold+0x32
zfs`dmu_buf_hold_array_by_dnode+0x206
zfs`dmu_buf_hold_array+0x9e
zfs`dmu_read_iokit+0x78
zfs`zvol_read_iokit+0x17f
zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xbd
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`0xffffff8020bd0c30+0x957
mach_kernel`cluster_read_ext+0x13b5
mach_kernel`hfs_vnop_read+0x236
mach_kernel`VNOP_READ+0xe1
mach_kernel`0xffffff8020bf37e0+0xf5
mach_kernel`0xffffff8020df1c50+0xae
mach_kernel`pread_nocancel+0x89
mach_kernel`unix_syscall64+0x1f3
mach_kernel`hndl_unix_scall64+0x16
674047 15021
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_ready+0x27d
zfs`__zio_execute+0x12a
zfs`zio_ready+0x27d
zfs`__zio_execute+0x12a
zfs`zio_execute+0x15
spl`taskq_thread+0xc7
mach_kernel`call_continuation+0x17
377 15083
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`dbuf_will_dirty+0x6e
zfs`dmu_buf_will_dirty+0x28
zfs`dmu_write_iokit_dnode+0x176
zfs`dmu_write_iokit_dbuf+0x7c
zfs`zvol_write_iokit+0x235
zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xc4
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x5a9
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`0xffffff8020bd2bc0+0x228
mach_kernel`0xffffff8020bd2480+0x253
mach_kernel`cluster_push_ext+0x1ac
mach_kernel`hfs_fsync+0x127
mach_kernel`hfs_vnop_fsync+0x6b
mach_kernel`VNOP_FSYNC+0x43
mach_kernel`0xffffff8020beb090+0x77
mach_kernel`unix_syscall64+0x1f3
mach_kernel`hndl_unix_scall64+0x16
673687 15456
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`__dbuf_hold_impl+0x35c
zfs`dbuf_hold_impl+0x8c
zfs`dbuf_hold+0x32
zfs`dmu_buf_hold_array_by_dnode+0x206
zfs`dmu_buf_hold_array+0x9e
zfs`dmu_read_iokit+0x78
zfs`zvol_read_iokit+0x17f
zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xbd
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`0xffffff8020bd0c30+0x957
mach_kernel`cluster_read_ext+0x13b5
mach_kernel`hfs_vnop_read+0x236
mach_kernel`VNOP_READ+0xe1
mach_kernel`0xffffff8020bf37e0+0xf5
mach_kernel`0xffffff8020df1c50+0xae
mach_kernel`read_nocancel+0x7f
mach_kernel`unix_syscall64+0x1f3
mach_kernel`hndl_unix_scall64+0x16
673809 15594
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`dmu_buf_hold_array_by_dnode+0x271
zfs`dmu_buf_hold_array+0x9e
zfs`dmu_read_iokit+0x78
zfs`zvol_read_iokit+0x17f
zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xbd
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`cluster_pagein_ext+0x145
mach_kernel`cluster_pagein+0x25
mach_kernel`hfs_vnop_pagein+0x2b7
mach_kernel`VNOP_PAGEIN+0x57
mach_kernel`vnode_pagein+0x17c
mach_kernel`vnode_pager_cluster_read+0x44
mach_kernel`vnode_pager_data_request+0x63
mach_kernel`vm_fault_page+0xeb2
mach_kernel`vm_fault+0xa64
mach_kernel`user_trap+0x2ec
mach_kernel`hndl_alltraps+0xdb
673643 15615
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`dmu_buf_hold_array_by_dnode+0x271
zfs`dmu_buf_hold_array+0x9e
zfs`dmu_read_iokit+0x78
zfs`zvol_read_iokit+0x17f
zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xbd
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`cluster_pagein_ext+0x145
mach_kernel`cluster_pagein+0x25
mach_kernel`hfs_vnop_pagein+0x2b7
mach_kernel`VNOP_PAGEIN+0x57
mach_kernel`vnode_pagein+0x17c
mach_kernel`vnode_pager_cluster_read+0x44
mach_kernel`vnode_pager_data_request+0x63
mach_kernel`vm_fault_page+0xeb2
mach_kernel`vm_fault+0xa64
mach_kernel`user_trap+0x2ec
mach_kernel`hndl_alltraps+0xdb
673911 16393
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_ready+0x27d
zfs`__zio_execute+0x12a
zfs`zio_ready+0x27d
zfs`__zio_execute+0x12a
zfs`zio_execute+0x15
spl`taskq_thread+0xc7
mach_kernel`call_continuation+0x17
378 16717
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`__dbuf_hold_impl+0x35c
zfs`dbuf_hold_impl+0x8c
zfs`dbuf_hold+0x32
zfs`dmu_buf_hold_array_by_dnode+0x206
zfs`dmu_buf_hold_array+0x9e
zfs`dmu_read_iokit+0x78
zfs`zvol_read_iokit+0x17f
zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xbd
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`cluster_pagein_ext+0x145
mach_kernel`cluster_pagein+0x25
mach_kernel`hfs_vnop_pagein+0x2b7
mach_kernel`VNOP_PAGEIN+0x57
mach_kernel`vnode_pagein+0x17c
mach_kernel`vnode_pager_cluster_read+0x44
mach_kernel`vnode_pager_data_request+0x63
mach_kernel`vm_fault_page+0xeb2
mach_kernel`vm_fault+0xa64
mach_kernel`user_trap+0x2ec
mach_kernel`hndl_alltraps+0xdb
674047 17443
zfs`vdev_iokit_strategy+0x217
zfs`vdev_iokit_io_start+0x1b2
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`vdev_mirror_io_start+0x265
zfs`zio_vdev_io_start+0x7c
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`arc_read+0xedb
zfs`dbuf_read_impl+0x48d
zfs`dbuf_read+0x24c
zfs`dmu_buf_hold_array_by_dnode+0x271
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zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xbd
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
IOStorageFamily`IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*)+0x10f
IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
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mach_kernel`0xffffff8020bcc3d0+0xa49
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mach_kernel`0xffffff8020bd0c30+0x612
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mach_kernel`0xffffff8020df1c50+0xae
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mach_kernel`unix_syscall64+0x1f3
mach_kernel`hndl_unix_scall64+0x16
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zfs`vdev_iokit_strategy+0x217
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IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
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IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x586
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mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`0xffffff8020bd0c30+0x957
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mach_kernel`0xffffff8020df1c50+0xae
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mach_kernel`hndl_unix_scall64+0x16
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zfs`vdev_iokit_strategy+0x217
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zfs`net_lundman_zfs_zvol_device::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*)+0xc4
IOStorageFamily`IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*)+0x92
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IOStorageFamily`dkreadwrite(void*, dkrtype_t)+0x5a9
mach_kernel`spec_strategy+0x21e
mach_kernel`buf_strategy+0xac
mach_kernel`VNOP_STRATEGY+0x46
mach_kernel`0xffffff8020bcc3d0+0xa49
mach_kernel`cluster_pageout_ext+0x137
mach_kernel`cluster_pageout+0x25
mach_kernel`hfs_vnop_pageout+0x43f
mach_kernel`VNOP_PAGEOUT+0x59
mach_kernel`vnode_pageout+0x1e2
mach_kernel`vnode_pager_cluster_write+0x132
mach_kernel`vnode_pager_data_return+0xf
mach_kernel`0xffffff8020aa0680+0x1e4
mach_kernel`call_continuation+0x17
515 32856449
zfs`vdev_iokit_sync+0x76
zfs`vdev_iokit_io_start+0x12c
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
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zfs`zio_flush+0x54
zfs`vdev_uberblock_sync_list+0xf6
zfs`vdev_config_sync+0x1b4
zfs`spa_sync+0x63a
zfs`txg_sync_thread+0x3e6
mach_kernel`call_continuation+0x17
454 36606130
zfs`vdev_iokit_sync+0x76
zfs`vdev_iokit_io_start+0x12c
zfs`zio_vdev_io_start+0x3e8
zfs`__zio_execute+0x12a
zfs`zio_nowait+0x5b
zfs`zio_flush+0x54
zfs`vdev_config_sync+0x13a
zfs`spa_sync+0x63a
zfs`txg_sync_thread+0x3e6
mach_kernel`call_continuation+0x17
454 85853003
@evansus
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evansus commented Jun 4, 2014

First number is thread_id, second number is nanoseconds between :enter and :return.

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