seq_io.bt

 1/*
 2	$1: 	dev_t
 3	$2: 	RWBS
 4	$3:     strlen($2)
 5*/
 6BEGIN {
 7	@last_rw[$1, str($2)] = (uint64)0;
 8}
 9tracepoint:block:block_rq_complete
10{
11	$dev = $1;
12	if ((int64)args.dev == $1 && !strncmp(args.rwbs, str($2), $3)) {
13		$last = @last_rw[$dev, str($2)];
14		if ((uint64)args.sector != $last) {
15			printf("io_out_of_order: exp %llu actual %llu\n",
16				args.sector, $last);
17		}
18		@last_rw[$dev, str($2)] = (args.sector + args.nr_sector);
19	}
20}
21
22END {
23	clear(@last_rw);
24}