#!/usr/sbin/dtrace -qs 

/*
 * Copyright (c) 2012, Ben Rockwood (benr@cuddletech.com)
 */

   /* This should look at the arguments to dmu_zfetch_fetch */
/*
fbt:zfs:dmu_zfetch_fetch:entry 
{ 
  self->object = args[0]->dn_object;
  self->blockid = arg1;
  self->blocks  = arg2;
  self->start = timestamp;
  printf("Prefetching object %d from dataset %s : %d blocks for blockid %dn", 
	 args[0]->dn_objset->os_dsl_dataset->ds_dir->dd_object,
	 args[0]->dn_objset->os_dsl_dataset->ds_dir->dd_myname, 
	 arg2, arg1); 
}
*/

fbt:zfs:dbuf_prefetch:entry
{
  printf("  zfetching object %d block %d (%d bytes) from dataset %s\n", 
	 args[0]->dn_objset->os_dsl_dataset->ds_dir->dd_object,
	 arg1,
	 args[0]->dn_datablksz, 
	 stringof(args[0]->dn_objset->os_dsl_dataset->ds_dir->dd_myname));
}