# ide.stp
# quick probe to watch for idedrive requests
# Will Cohen
# 
# FIXME this only works for dma based ide hard disk drives
# FIXME does not catch program io
# FIXME does not work for cdrom drive
#

global ide_count
global ide_count_intr
global ide_requests_start
global ide_service_time

function _(n) { return string(n) } 

function report () {
	print("ide rw requests " . _(ide_count) . "\n");
	print("ide dma intr " . _(ide_count_intr) . "\n");
	# write out info on service times
	foreach (time+ in ide_service_time) {
	  print( _(time) . "ms count = " . _(ide_service_time[time]) . "\n")
	}
}

probe kernel.function("ide_do_rw_disk")
{
	++ide_count;
	ide_requests_start[$drive] = gettimeofday_ms();
}

probe kernel.function("ide_dma_intr")
{
	++ide_count_intr;
	if (ide_requests_start[$drive]) {
		service_time = gettimeofday_ms() - ide_requests_start[$drive];
		++ide_service_time[service_time];
	}
}

probe begin {
  print ("ide tracking, start time=" . _(gettimeofday_ms()) . "\n")
}

probe end {
  report()
  print ("ide tracking, end time=" . _(gettimeofday_ms()) . "\n")
}