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 Mon Jun 15, 2026 12:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
110136	2	376	0,2	sleep3	75	-21	kworker/3:1-events	08:55:01	3
297119	2	188	0,2	sleep3	47	1	rcuc/3	12:30:35	3
302924	2	78	0,2	chrt	75	-21	kworker/3:1+events	12:35:44	3
3844	99	77	73,3	cyclictest	4192615	-21	kworker/u8:1+flush-8:0	07:20:01	1
3843	99	70	58,9	cyclictest	174727	-21	diskstats	10:30:29	0
3844	99	66	61,4	cyclictest	100167	-21	kworker/u8:2+flush-8:0	12:00:44	1
3844	99	66	58,6	cyclictest	243571	-21	kworker/u8:1+events_unbound	12:25:43	1
3843	99	63	33,19	cyclictest	138970	-21	kworker/u8:0+flush-8:0	09:20:44	0
3844	99	62	54,5	cyclictest	119681	-21	kworker/u8:4+flush-8:0	10:20:22	1
3844	99	62	53,7	cyclictest	29599	-21	ntpq	07:30:39	1
3844	99	61	55,4	cyclictest	119681	-21	kworker/u8:4+flush-8:0	10:30:45	1
3844	99	61	54,5	cyclictest	119681	-21	kworker/u8:4+events_unbound	09:50:31	1
3844	99	60	55,4	cyclictest	4177720	-21	kworker/u8:2+events_unbound	07:20:41	1
3844	99	60	54,4	cyclictest	234307	-21	kworker/u8:0+events_unbound	11:45:29	1
3844	99	60	54,4	cyclictest	106282	-21	kworker/u8:3+events_unbound	09:05:43	1
3844	99	59	55,2	cyclictest	234307	-21	kworker/u8:0+events_unbound	12:05:43	1
3844	99	59	53,5	cyclictest	4145848	-21	kworker/u8:0+flush-8:0	07:35:26	1
3844	99	59	53,4	cyclictest	158907	-21	kworker/u8:1+events_unbound	11:10:29	1
3844	99	59	52,5	cyclictest	158907	-21	kworker/u8:1+flush-8:0	11:00:36	1
3844	99	59	51,6	cyclictest	60909	-21	kworker/u8:1+events_unbound	08:10:45	1
3843	99	59	53,4	cyclictest	199124	-21	kworker/u8:3+flush-8:0	11:25:29	0
3843	99	59	52,5	cyclictest	228656	-21	latency_hist	11:25:00	0
3844	99	58	54,3	cyclictest	100167	-21	kworker/u8:2+events_unbound	10:40:38	1
3844	99	57	51,4	cyclictest	119681	-21	kworker/u8:4+flush-8:0	09:35:23	1
3844	99	57	51,4	cyclictest	119681	-21	kworker/u8:4+events_unbound	09:10:38	1
3844	99	56	50,4	cyclictest	4192615	-21	kworker/u8:1+events_unbound	07:10:41	1
3844	99	56	50,4	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	08:15:25	1
3844	99	56	49,5	cyclictest	4192615	-21	kworker/u8:1+events_unbound	07:25:39	1
3843	99	56	46,8	cyclictest	119681	-21	kworker/u8:4+flush-8:0	09:35:36	0
3844	99	55	50,4	cyclictest	4177720	-21	kworker/u8:2+events_unbound	07:45:37	1
3844	99	55	49,4	cyclictest	243571	-21	kworker/u8:1+events_unbound	12:35:42	1
3843	99	55	45,8	cyclictest	84372	-21	ntpq	08:25:38	0
3844	99	53	47,3	cyclictest	158907	-21	kworker/u8:1+flush-8:0	10:55:27	1
3844	99	52	48,3	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	08:00:40	1
3844	99	52	47,4	cyclictest	199124	-21	kworker/u8:3+flush-8:0	11:35:40	1
3844	99	52	47,3	cyclictest	243571	-21	kworker/u8:1+events_unbound	12:20:28	1
3844	99	52	46,4	cyclictest	106282	-21	kworker/u8:3+events_unbound	09:00:36	1
3844	99	52	45,5	cyclictest	100167	-21	kworker/u8:2+flush-8:0	11:15:40	1
3843	99	52	40,9	cyclictest	59378	-21	ntpq	08:00:39	0
3844	99	51	47,2	cyclictest	263731	-21	latency_hist	12:00:00	1
3844	99	51	46,4	cyclictest	119681	-21	kworker/u8:4+events_unbound	10:15:01	1
3844	99	51	46,3	cyclictest	85507	-21	kworker/u8:3+flush-8:0	08:40:33	1
3844	99	51	45,4	cyclictest	243571	-21	kworker/u8:1+events_unbound	12:10:29	1
3844	99	51	45,4	cyclictest	199124	-21	kworker/u8:3+events_unbound	11:25:36	1
3844	99	51	44,5	cyclictest	60909	-21	kworker/u8:1+flush-8:0	08:25:39	1
3843	99	51	46,4	cyclictest	100167	-21	kworker/u8:2+flush-8:0	11:05:43	0
3843	99	51	45,4	cyclictest	4145848	-21	kworker/u8:0+flush-8:0	07:35:26	0
3844	99	50	45,3	cyclictest	198000	-21	ntpq	10:50:38	1
3844	99	50	45,3	cyclictest	100167	-21	kworker/u8:2+flush-8:0	11:05:41	1
3844	99	50	44,4	cyclictest	60909	-21	kworker/u8:1+flush-8:0	08:35:31	1
3844	99	49	43,5	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	07:40:45	1
3844	99	49	43,4	cyclictest	100167	-21	kworker/u8:2+flush-8:0	11:20:40	1
3844	99	49	42,5	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	07:50:40	1
3844	99	49	42,5	cyclictest	234307	-21	kworker/u8:0+events_unbound	12:15:43	1
3844	99	49	40,7	cyclictest	54418	-21	ntpq	07:55:38	1
3843	99	49	43,4	cyclictest	234307	-21	kworker/u8:0+flush-8:0	11:40:32	0
3843	99	49	40,7	cyclictest	1704890	-21	systemd-journal	11:35:01	0
3843	99	49	37,9	cyclictest	1704890	-21	systemd-journal	09:20:01	0
3844	99	48	44,3	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	08:20:42	1
3844	99	48	44,3	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	08:20:42	1
3844	99	48	43,3	cyclictest	100167	-21	kworker/u8:2+events_unbound	11:30:45	1
3844	99	48	43,2	cyclictest	100167	-21	kworker/u8:2+events_unbound	10:00:33	1
3844	99	48	41,5	cyclictest	293715	-21	/usr/sbin/munin	12:30:40	1
3844	99	48	40,6	cyclictest	105370	-21	/usr/sbin/munin	08:50:36	1
3844	99	47	38,7	cyclictest	1704890	-21	systemd-journal	09:50:01	1
3843	99	47	40,5	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	07:15:40	0
3844	99	46	41,4	cyclictest	100167	-21	kworker/u8:2+flush-8:0	08:45:44	1
3844	99	46	40,4	cyclictest	119681	-21	kworker/u8:4+events_unbound	09:20:28	1
3844	99	46	39,5	cyclictest	119681	-21	kworker/u8:4+flush-8:0	09:15:37	1
3844	99	45	40,4	cyclictest	100167	-21	kworker/u8:2+flush-8:0	10:25:31	1
3843	99	45	40,4	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	07:45:28	0
3843	99	45	38,5	cyclictest	110334	-21	/usr/sbin/munin	08:55:36	0
3843	99	44	36,6	cyclictest	100167	-21	kworker/u8:2+events_unbound	08:45:38	0
3844	99	43	37,4	cyclictest	106282	-21	kworker/u8:3+flush-8:0	08:55:39	1
3843	99	43	39,3	cyclictest	85507	-21	kworker/u8:3+events_unbound	08:30:45	0
3843	99	43	37,4	cyclictest	60909	-21	kworker/u8:1+flush-8:0	08:15:40	0
3843	99	43	37,4	cyclictest	158907	-21	kworker/u8:1+events_unbound	11:00:42	0
3843	99	43	33,7	cyclictest	1704890	-21	systemd-journal	07:15:01	0
3843	99	43	32,9	cyclictest	140545	-21	cp	09:30:01	0
3844	99	42	35,5	cyclictest	4177720	-21	kworker/u8:2+events_unbound	08:05:31	1
3843	99	42	36,4	cyclictest	243571	-21	kworker/u8:1+events_unbound	11:40:00	0
3843	99	42	36,4	cyclictest	119681	-21	kworker/u8:4+flush-8:0	10:20:24	0
3848	99	41	35,4	cyclictest	234307	-21	kworker/u8:0+flush-8:0	12:10:40	2
3848	99	41	33,6	cyclictest	234217	-21	cat	11:30:00	2
3844	99	41	34,6	cyclictest	100167	-21	kworker/u8:2+events_unbound	11:50:40	1
3843	99	41	35,4	cyclictest	106282	-21	kworker/u8:3+events_unbound	09:05:45	0
3843	99	41	29,8	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	08:20:26	0
3843	99	41	29,8	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	08:20:25	0
3844	99	39	34,3	cyclictest	234307	-21	kworker/u8:0+flush-8:0	11:40:36	1
3843	99	39	34,4	cyclictest	4177720	-21	kworker/u8:2+flush-8:0	07:30:30	0
3843	99	39	32,5	cyclictest	55334	-21	latency_hist	08:00:00	0
3843	99	39	32,5	cyclictest	243571	-21	kworker/u8:1+flush-8:0	12:30:38	0
3843	99	39	32,5	cyclictest	100167	-21	kworker/u8:2+flush-8:0	10:55:37	0
3844	99	38	34,3	cyclictest	60909	-21	kworker/u8:1+flush-8:0	08:30:30	1
3843	99	38	33,4	cyclictest	60909	-21	kworker/u8:1+flush-8:0	08:40:36	0
3843	99	38	31,5	cyclictest	278167	-21	kworker/u8:3+events_unbound	12:15:37	0
3843	99	37	33,3	cyclictest	60909	-21	kworker/u8:1+events_unbound	08:50:43	0
3843	99	37	33,3	cyclictest	287685	-21	kworker/u8:2+flush-8:0	12:24:05	0
3843	99	37	31,5	cyclictest	100167	-21	kworker/u8:2+events_unbound	10:10:38	0
3843	99	37	31,4	cyclictest	60909	-21	kworker/u8:1+events_unbound	08:35:43	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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