dtrace probe for OpenZFS on OS X vdev-iokit branch

off-cpu-vdev-iokit.d

#!/usr/sbin/dtrace -s

#pragma D option quiet
#pragma D option stackframes=100
#pragma D option ustackframes=100

fbt::vdev_iokit_io_start:entry, fbt::vdev_iokit_strategy:entry,
fbt::vdev_iokit_io_done:entry, fbt::vdev_iokit_sync:entry,
fbt::vdev_iokit_alloc:entry, fbt::vdev_iokit_free:entry,
fbt::vdev_iokit_physio:entry, fbt::vdev_iokit_strategy:entry
{
	self->start = timestamp;
}

fbt::vdev_iokit_io_start:return, fbt::vdev_iokit_strategy:return,
fbt::vdev_iokit_io_done:return, fbt::vdev_iokit_sync:return,
fbt::vdev_iokit_alloc:return, fbt::vdev_iokit_free:return,
fbt::vdev_iokit_physio:return, fbt::vdev_iokit_strategy:return
/self->start/
{
	this->time = timestamp - self->start;
	@[stack(),tid] = sum(this->time);
	self->start = 0;
}

dtrace:::END
{
	printa("%k %llu %@d\n", @);
}