Files
linux-st/include/linux
Nikanth Karthikesan 316d315bff block: Seperate read and write statistics of in_flight requests v2
Commit a9327cac44 added seperate read
and write statistics of in_flight requests. And exported the number
of read and write requests in progress seperately through sysfs.

But  Corrado Zoccolo <czoccolo@gmail.com> reported getting strange
output from "iostat -kx 2". Global values for service time and
utilization were garbage. For interval values, utilization was always
100%, and service time is higher than normal.

So this was reverted by commit 0f78ab9899

The problem was in part_round_stats_single(), I missed the following:
        if (now == part->stamp)
                return;

-       if (part->in_flight) {
+       if (part_in_flight(part)) {
                __part_stat_add(cpu, part, time_in_queue,
                                part_in_flight(part) * (now - part->stamp));
                __part_stat_add(cpu, part, io_ticks, (now - part->stamp));

With this chunk included, the reported regression gets fixed.

Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>

--
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-10-06 20:16:55 +02:00
..
2009-09-23 07:39:29 -07:00
2009-09-19 02:14:45 -04:00
2009-09-20 16:09:20 +05:30
2009-09-23 11:01:25 -07:00
2009-09-23 07:39:41 -07:00
2009-09-26 10:17:19 -07:00
2009-09-30 00:32:06 -04:00
2009-09-23 07:39:58 -07:00
2009-09-19 13:13:17 -07:00
2009-09-26 10:17:19 -07:00
2009-09-22 07:17:33 -07:00
2009-09-23 07:39:41 -07:00
2009-09-22 07:17:35 -07:00
2009-09-21 15:14:51 +02:00
2009-09-26 10:17:19 -07:00
2009-09-22 07:17:47 -07:00
2009-10-04 15:05:10 -07:00
2009-09-23 07:39:41 -07:00
2009-09-19 08:53:22 +02:00
2009-09-19 08:53:22 +02:00
2009-09-23 06:46:23 -07:00
2009-09-23 18:13:10 -07:00
2009-09-23 22:26:32 +09:30
2009-09-23 22:26:32 +09:30
2009-09-23 22:26:32 +09:30
2009-09-23 22:26:32 +09:30
2009-09-23 22:26:32 +09:30
2009-09-23 22:26:32 +09:30
2009-09-22 07:17:30 -07:00
2009-09-19 13:13:25 -07:00
2009-09-19 13:13:26 -07:00
2009-09-21 15:14:53 +02:00