after removed lquantize and quantize,
#!/usr/sbin/dtrace -qCs
dtrace:::BEGIN
{
printf("Tracing...Hit Ctrl-C to end.\n");
}
fbt:sd:sdstrategy:entry
{
start[(struct buf *)arg0] = timestamp;
}
fbt:sd:sdintr:entry
/ start[(this->buf = (struct buf *)((struct scsi_pkt *)arg0)->pkt_private)] !=
0 /
{
this->un = ((struct sd_xbuf *) this->buf->b_private)->xb_un;
this->scsi_device = ((struct sd_lun *)this->un)->un_sd;
this->scsi_address = ((struct scsi_device
*)this->scsi_device)->sd_address;
this->tgt_id = ((struct scsi_address)this->scsi_address).a_target;
this->lun_id = ((struct scsi_address)this->scsi_address).a_lun;
this->sd_dev = ((struct scsi_device *)this->scsi_device)->sd_dev;
this->devi_addr = ((struct dev_info *)this->sd_dev)->devi_addr;
start[this->buf] = 0;
}
the CPU utilization changed from 73% to 91%
after remove all the casts:
#!/usr/sbin/dtrace -qCs
dtrace:::BEGIN
{
printf("Tracing...Hit Ctrl-C to end.\n");
}
fbt:sd:sdstrategy:entry
{
start[(struct buf *)arg0] = timestamp;
}
fbt:sd:sdintr:entry
/ start[(this->buf = (struct buf *)((struct scsi_pkt *)arg0)->pkt_private)] !=
0 /
{
start[this->buf] = 0;
}
The CPU utilization change is from 73% to 83%
With the following code:
#!/usr/sbin/dtrace -qCs
dtrace:::BEGIN
{
printf("Tracing...Hit Ctrl-C to end.\n");
}
fbt:sd:sdstrategy:entry
{
}
fbt:sd:sdintr:entry
{
}
CPU utilization is from 73% to 76%
With this code:
fbt:sd:sdintr:entry
/ start[(this->buf = (struct buf *)((struct scsi_pkt *)arg0)->pkt_private)] !=
0 /
{
this->un = ((struct sd_xbuf *) this->buf->b_private)->xb_un;
this->scsi_device = ((struct sd_lun *)this->un)->un_sd;
this->scsi_address = ((struct scsi_device
*)this->scsi_device)->sd_address;
this->tgt_id = ((struct scsi_address)this->scsi_address).a_target;
this->lun_id = ((struct scsi_address)this->scsi_address).a_lun;
start[this->buf] = 0;
}
CPU utilization is from 73% to 90%
Thanks.
--
This message posted from opensolaris.org
_______________________________________________
dtrace-discuss mailing list
[email protected]
