OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

Click here to display the system's profile data or here to proceed to next system.

Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.
Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Sat Aug 22, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1496823	2	361	0,6	sleep3	0	-21	swapper/3	07:52:42	3
1514819	2	67	0,3	chrt	20	1	rcuc/0	08:07:52	0
1453698	99	57	49,6	cyclictest	1733545	-21	latency_hist	11:50:01	0
1453698	99	56	51,4	cyclictest	1475591	-21	kworker/u8:3+events_unbound	08:47:54	0
1453701	99	55	50,3	cyclictest	1733560	-21	kworker/u8:0+flush-8:0	12:00:00	1
1453701	99	55	49,4	cyclictest	1453578	-21	kworker/u8:2+events_unbound	09:05:00	1
1453698	99	55	50,3	cyclictest	1694289	-21	kworker/u8:2+events_unbound	11:40:00	0
1453701	99	53	48,4	cyclictest	1555064	-21	kworker/u8:0+flush-8:0	09:42:52	1
1453701	99	51	45,4	cyclictest	1609999	-21	kworker/u8:3+events_unbound	10:00:01	1
1453701	99	50	45,4	cyclictest	1733560	-21	kworker/u8:0+flush-8:0	12:07:53	1
1453701	99	50	45,4	cyclictest	1733560	-21	kworker/u8:0+flush-8:0	12:07:53	1
1453701	99	50	43,5	cyclictest	1505781	-21	kworker/u8:1+flush-8:0	08:02:38	1
1453701	99	49	43,5	cyclictest	1505781	-21	kworker/u8:1+flush-8:0	08:22:52	1
1453701	99	49	43,4	cyclictest	1555064	-21	kworker/u8:0+events_unbound	10:27:38	1
1453701	99	48	43,3	cyclictest	1694289	-21	kworker/u8:2+events_unbound	11:32:54	1
1453701	99	48	42,5	cyclictest	1694289	-21	kworker/u8:2+flush-8:0	11:12:44	1
1453701	99	48	41,5	cyclictest	1580294	-21	kworker/u8:4+flush-8:0	09:22:48	1
1453701	99	48	37,8	cyclictest	275	-21	systemd-journal	11:06:18	1
1453698	99	48	38,8	cyclictest	1739170	-21	diskstats	11:57:39	0
1643185	2	47	0,3	sleep3	575	-21	kworker/3:2-events	10:17:45	3
1453701	99	47	39,6	cyclictest	1630013	-21	apt-get	10:07:35	1
1453703	99	46	39,5	cyclictest	1565163	-21	base64	09:00:00	2
1453701	99	46	41,4	cyclictest	1418855	-21	kworker/u8:1+events_unbound	07:17:53	1
1453701	99	46	40,5	cyclictest	1669310	-21	kworker/u8:0+events_unbound	10:52:43	1
1453701	99	45	40,4	cyclictest	1718561	-21	kworker/u8:3+flush-8:0	12:02:53	1
1453701	99	45	40,4	cyclictest	1555064	-21	kworker/u8:0+flush-8:0	09:47:44	1
1453703	99	44	35,7	cyclictest	275	-21	systemd-journal	09:20:00	2
1453701	99	44	40,3	cyclictest	1426351	-21	kworker/u8:0+flush-8:0	07:22:50	1
1453701	99	44	39,3	cyclictest	1555064	-21	kworker/u8:0+events_unbound	08:57:37	1
1453701	99	44	38,5	cyclictest	1475591	-21	kworker/u8:3+flush-8:0	08:47:50	1
1453701	99	44	38,4	cyclictest	1694289	-21	kworker/u8:2+flush-8:0	11:22:58	1
1453701	99	44	38,4	cyclictest	1570142	-21	kworker/u8:1+flush-8:0	09:07:44	1
1453701	99	44	37,5	cyclictest	1718561	-21	kworker/u8:3+flush-8:0	11:52:50	1
1453701	99	43	40,2	cyclictest	1758506	-21	kworker/u8:3+events_unbound	12:17:43	1
1453701	99	43	38,4	cyclictest	1580294	-21	kworker/u8:4+flush-8:0	09:27:39	1
1453701	99	43	38,3	cyclictest	1418855	-21	kworker/u8:1+flush-8:0	07:42:43	1
1453701	99	43	38,3	cyclictest	1418855	-21	kworker/u8:1+flush-8:0	07:42:43	1
1453701	99	43	37,5	cyclictest	1654044	-21	kworker/u8:1+events_unbound	11:17:47	1
1453701	99	43	37,4	cyclictest	1418855	-21	kworker/u8:1+flush-8:0	07:52:50	1
1453701	99	43	37,4	cyclictest	1418855	-21	kworker/u8:1+flush-8:0	07:37:52	1
1453701	99	43	36,5	cyclictest	1727898	-21	ntpq	11:42:49	1
1453701	99	43	36,5	cyclictest	1599836	-21	kworker/u8:2+flush-8:0	10:22:50	1
1449053	2	43	27,10	sleep1	0	-21	swapper/1	07:06:58	1
1453701	99	42	38,3	cyclictest	1453578	-21	kworker/u8:2+flush-8:0	08:20:01	1
1453701	99	42	37,4	cyclictest	1748203	-21	kworker/u8:2+events_unbound	12:27:37	1
1453701	99	42	36,5	cyclictest	1773446	-21	kworker/u8:1+flush-8:0	12:37:43	1
1453701	99	42	36,4	cyclictest	1748203	-21	kworker/u8:2+flush-8:0	12:22:49	1
1453701	99	42	35,5	cyclictest	1475591	-21	kworker/u8:3+flush-8:0	08:12:50	1
1453701	99	42	34,5	cyclictest	275	-21	systemd-journal	10:42:18	1
1453701	99	42	32,7	cyclictest	1474934	-21	ntpq	07:27:52	1
1453698	99	42	38,3	cyclictest	1555064	-21	kworker/u8:0+events_unbound	09:37:42	0
1453701	99	41	37,3	cyclictest	1773446	-21	kworker/u8:1+flush-8:0	12:32:41	1
1453701	99	41	37,3	cyclictest	1718561	-21	kworker/u8:3+flush-8:0	11:38:20	1
1453701	99	41	36,4	cyclictest	1555064	-21	kworker/u8:0+flush-8:0	09:52:48	1
1453701	99	41	35,5	cyclictest	1453578	-21	kworker/u8:2+events_unbound	07:32:38	1
1453701	99	40	35,4	cyclictest	1654044	-21	kworker/u8:1+events_unbound	11:27:39	1
1453701	99	40	35,4	cyclictest	1599836	-21	kworker/u8:2+flush-8:0	09:37:54	1
1453701	99	39	35,3	cyclictest	1599836	-21	kworker/u8:2+events_unbound	09:35:01	1
1453701	99	39	32,5	cyclictest	1654044	-21	kworker/u8:1+flush-8:0	10:32:43	1
1453701	99	39	29,3	cyclictest	1475591	-21	kworker/u8:3+events_unbound	08:32:41	1
1453698	99	39	30,7	cyclictest	1594920	-21	latency_hist	09:30:01	0
1453701	99	38	33,4	cyclictest	1580294	-21	kworker/u8:4+events_unbound	09:17:54	1
1453701	99	38	33,3	cyclictest	1555064	-21	kworker/u8:0+flush-8:0	10:02:43	1
1453701	99	38	32,4	cyclictest	1570142	-21	kworker/u8:1+flush-8:0	09:12:54	1
1453701	99	38	32,4	cyclictest	1570142	-21	kworker/u8:1+flush-8:0	09:12:54	1
1453701	99	38	32,4	cyclictest	1555064	-21	kworker/u8:0+flush-8:0	10:17:54	1
1453701	99	38	31,5	cyclictest	1729053	-21	apt-get	11:47:34	1
1453701	99	38	31,5	cyclictest	1475591	-21	kworker/u8:3+flush-8:0	07:57:49	1
1453698	99	38	31,5	cyclictest	1549900	-21	grep	08:42:56	0
1453698	99	38	30,6	cyclictest	1639407	-21	latency_hist	10:15:01	0
1453698	99	38	29,6	cyclictest	1614745	-21	latency_hist	09:50:01	0
1453698	99	38	28,8	cyclictest	1757517	-21	ntpq	12:12:48	0
1453698	99	38	0,36	cyclictest	1	-21	systemd	10:51:18	0
1453701	99	37	31,5	cyclictest	1654044	-21	kworker/u8:1+flush-8:0	10:37:39	1
1453701	99	37	31,5	cyclictest	1654044	-21	kworker/u8:1+flush-8:0	10:37:39	1
1453703	99	36	27,7	cyclictest	1490601	-21	gpgv	07:45:00	2
1453703	99	36	27,7	cyclictest	1490601	-21	gpgv	07:45:00	2
1453701	99	36	32,3	cyclictest	1555064	-21	kworker/u8:0+events_unbound	10:12:43	1
1453701	99	36	31,3	cyclictest	1748203	-21	kworker/u8:2+events_unbound	12:12:44	1
1453698	99	36	30,4	cyclictest	401	-21	dbus-daemon	07:30:00	0
1453698	99	36	29,5	cyclictest	1457877	-21	ntpq	07:12:48	0
1453701	99	35	30,4	cyclictest	1654044	-21	kworker/u8:1+flush-8:0	10:47:38	1
1453701	99	35	26,6	cyclictest	275	-21	systemd-journal	08:08:18	1
1453698	99	35	28,5	cyclictest	1570142	-21	kworker/u8:1+events_unbound	09:07:50	0
1453698	99	35	25,7	cyclictest	1490494	-21	latency_hist	07:45:00	0
1453698	99	35	25,7	cyclictest	1490494	-21	latency_hist	07:45:00	0
1453701	99	34	29,4	cyclictest	1475591	-21	kworker/u8:3+events_unbound	08:37:46	1
1453701	99	34	29,4	cyclictest	1453578	-21	kworker/u8:2+flush-8:0	07:47:57	1
1453698	99	34	10,16	cyclictest	1648881	-21	cat	10:22:55	0
1453701	99	33	29,3	cyclictest	1669310	-21	kworker/u8:0+flush-8:0	11:02:54	1
1453701	99	33	27,4	cyclictest	1475591	-21	kworker/u8:3+flush-8:0	08:27:48	1
1453698	99	33	24,6	cyclictest	1654044	-21	kworker/u8:1+flush-8:0	11:32:49	0
1453698	99	33	10,15	cyclictest	1463438	-21	cut	07:17:43	0
1652393	2	32	0,2	sleep3	48	1	ktimers/3	10:27:44	3
1453701	99	32	27,4	cyclictest	1418855	-21	kworker/u8:1+flush-8:0	07:10:31	1
1453698	99	32	25,5	cyclictest	1748367	-21	latency_hist	12:05:00	0
1453698	99	32	21,8	cyclictest	1658400	-21	ntpq	10:32:48	0
1453701	99	31	26,4	cyclictest	1505781	-21	kworker/u8:1+events_unbound	08:42:47	1
1453698	99	31	9,6	cyclictest	1705492	-21	cat	11:22:44	0
1453698	99	31	9,6	cyclictest	1680609	-21	cat	10:57:44	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17