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 Tue Jun 16, 2026 00:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1960788	99	75	68,5	cyclictest	2206424	-21	kworker/u8:2+events_unbound	23:30:37	1
1960788	99	73	65,6	cyclictest	2101263	-21	kworker/u8:0+flush-8:0	22:05:41	1
1960788	99	70	62,4	cyclictest	2251243	-21	kworker/u8:4+flush-8:0	00:25:26	1
1960788	99	69	62,5	cyclictest	2251243	-21	kworker/u8:4+events_unbound	00:35:38	1
1960788	99	69	60,7	cyclictest	2052513	-21	kworker/u8:3+flush-8:0	21:05:40	1
1960788	99	68	62,4	cyclictest	2037253	-21	kworker/u8:0+events_unbound	20:30:44	1
1960788	99	68	60,6	cyclictest	2076871	-21	kworker/u8:2+events_unbound	21:40:38	1
1960788	99	67	62,4	cyclictest	2206424	-21	kworker/u8:2+flush-8:0	23:35:46	1
1960788	99	67	61,4	cyclictest	2002451	-21	kworker/u8:2+flush-8:0	20:00:41	1
1960788	99	67	58,7	cyclictest	2037253	-21	kworker/u8:0+flush-8:0	20:25:39	1
1960788	99	66	60,5	cyclictest	2086994	-21	kworker/u8:1+events_unbound	21:35:41	1
1960788	99	66	60,5	cyclictest	2086994	-21	kworker/u8:1+events_unbound	21:35:41	1
1960788	99	66	60,4	cyclictest	2251243	-21	kworker/u8:4+flush-8:0	00:05:42	1
1960788	99	66	60,4	cyclictest	2251243	-21	kworker/u8:4+events_unbound	00:20:39	1
1960788	99	66	60,4	cyclictest	2052513	-21	kworker/u8:3+flush-8:0	20:40:45	1
1960788	99	66	59,5	cyclictest	2076871	-21	kworker/u8:2+flush-8:0	21:25:40	1
1960788	99	66	55,8	cyclictest	1965651	-21	latency_hist	19:15:01	1
1960788	99	65	60,4	cyclictest	1928932	-21	kworker/u8:2+events_unbound	19:30:43	1
1960788	99	65	60,3	cyclictest	1987252	-21	kworker/u8:0+events_unbound	19:40:41	1
1960788	99	65	58,5	cyclictest	2101263	-21	kworker/u8:0+events_unbound	23:10:40	1
1960786	99	65	57,6	cyclictest	2245108	-21	ntpq	23:50:36	0
1960786	99	65	42,9	cyclictest	2100656	-21	ntpq	21:25:35	0
1960788	99	64	58,5	cyclictest	1928932	-21	kworker/u8:2+flush-8:0	19:20:40	1
1960788	99	64	58,4	cyclictest	2235581	-21	kworker/u8:3+events_unbound	23:50:41	1
1960788	99	63	56,6	cyclictest	1987252	-21	kworker/u8:0+flush-8:0	19:35:38	1
1960788	99	63	56,5	cyclictest	2101263	-21	kworker/u8:0+events_unbound	23:25:41	1
1960786	99	63	46,6	cyclictest	1704890	-21	systemd-journal	00:30:38	0
1960788	99	62	55,6	cyclictest	1928932	-21	kworker/u8:2+flush-8:0	19:15:41	1
1960788	99	62	55,5	cyclictest	2101263	-21	kworker/u8:0+flush-8:0	23:00:44	1
1960788	99	61	57,3	cyclictest	2052513	-21	kworker/u8:3+flush-8:0	20:55:25	1
1960788	99	61	56,3	cyclictest	2125561	-21	kworker/u8:1+events_unbound	22:00:36	1
1960788	99	61	56,3	cyclictest	2002451	-21	kworker/u8:2+events_unbound	19:50:43	1
1960788	99	61	54,4	cyclictest	1967812	-21	kworker/u8:1+flush-8:0	19:45:37	1
1960788	99	61	53,6	cyclictest	2002451	-21	kworker/u8:2+flush-8:0	19:55:40	1
1960788	99	60	55,3	cyclictest	2145989	-21	kworker/u8:2+events_unbound	22:30:43	1
1960788	99	60	53,5	cyclictest	2206424	-21	kworker/u8:2+events_unbound	23:20:26	1
1960788	99	60	53,5	cyclictest	2206424	-21	kworker/u8:2+events_unbound	23:20:25	1
1960786	99	60	50,7	cyclictest	2065821	-21	ntpq	20:50:37	0
1960786	99	60	49,8	cyclictest	2236216	-21	apt-get	23:45:22	0
1960792	99	59	53,4	cyclictest	2111778	-21	kworker/u8:3+flush-8:0	22:10:42	2
1960788	99	59	53,5	cyclictest	2251236	-21	kworker/u8:0+flush-8:0	00:10:30	1
1960788	99	59	53,4	cyclictest	2052513	-21	kworker/u8:3+events_unbound	21:15:27	1
1960788	99	59	51,5	cyclictest	1967812	-21	kworker/u8:1+events_unbound	20:05:39	1
1960788	99	58	51,6	cyclictest	2111778	-21	kworker/u8:3+events_unbound	21:55:38	1
1960788	99	58	51,5	cyclictest	1960628	-21	kworker/u8:3+flush-8:0	20:20:39	1
1960788	99	58	50,5	cyclictest	2111778	-21	kworker/u8:3+events_unbound	21:50:39	1
1960786	99	58	50,5	cyclictest	2037253	-21	kworker/u8:0+flush-8:0	20:30:42	0
1971596	2	57	0,6	chrt	0	-21	swapper/0	19:15:36	0
1960788	99	57	51,4	cyclictest	2125561	-21	kworker/u8:1+flush-8:0	22:20:27	1
1960786	99	57	47,8	cyclictest	2171726	-21	/usr/sbin/munin	22:40:37	0
1960788	99	56	50,4	cyclictest	2251243	-21	kworker/u8:4+events_unbound	00:30:40	1
1960788	99	56	49,5	cyclictest	2206424	-21	kworker/u8:2+flush-8:0	23:55:38	1
1960788	99	56	46,7	cyclictest	2031814	-21	latency_hist	20:20:01	1
1960786	99	56	50,4	cyclictest	2002451	-21	kworker/u8:2+flush-8:0	20:35:43	0
1960788	99	55	50,4	cyclictest	2190456	-21	kworker/u8:3+events_unbound	23:00:01	1
1960788	99	55	50,3	cyclictest	1704890	-21	systemd-journal	22:50:37	1
1960788	99	55	48,5	cyclictest	2145989	-21	kworker/u8:2+flush-8:0	22:15:42	1
2152202	2	54	0,5	sleep2	0	-21	swapper/2	22:20:31	2
1960788	99	54	48,4	cyclictest	2206424	-21	kworker/u8:2+events_unbound	23:45:36	1
1960788	99	53	47,4	cyclictest	2206424	-21	kworker/u8:2+events_unbound	23:15:42	1
1960788	99	53	46,5	cyclictest	1967812	-21	kworker/u8:1+flush-8:0	21:00:41	1
1960788	99	53	43,8	cyclictest	2235045	-21	ntpq	23:40:38	1
1960786	99	53	48,4	cyclictest	2251243	-21	kworker/u8:4+flush-8:0	00:25:43	0
1960786	99	53	46,5	cyclictest	1977484	-21	latency_hist	19:25:01	0
1960788	99	51	46,4	cyclictest	2052513	-21	kworker/u8:3+flush-8:0	20:50:39	1
1960788	99	51	45,4	cyclictest	1967812	-21	kworker/u8:1+events_unbound	20:10:43	1
1960788	99	51	44,5	cyclictest	2145989	-21	kworker/u8:2+flush-8:0	22:25:40	1
1960786	99	51	43,6	cyclictest	2081581	-21	latency_hist	21:10:01	0
1960786	99	51	42,7	cyclictest	2032593	-21	diskstats	20:20:27	0
1960786	99	51	42,6	cyclictest	2021964	-21	latency_hist	20:10:00	0
1960786	99	51	41,7	cyclictest	2156881	-21	apt-get	22:25:23	0
1960788	99	50	41,7	cyclictest	2269929	-21	ntpq	00:15:37	1
1960786	99	50	41,6	cyclictest	1704890	-21	systemd-journal	23:10:37	0
1960792	99	49	30,7	cyclictest	2240872	-21	apt-get	23:50:01	2
1960788	99	49	42,5	cyclictest	2101263	-21	kworker/u8:0+flush-8:0	22:45:40	1
1960788	99	49	41,6	cyclictest	1967812	-21	kworker/u8:1+events_unbound	19:25:38	1
1960792	99	48	42,4	cyclictest	1928932	-21	kworker/u8:2+flush-8:0	19:10:31	2
1960788	99	48	42,3	cyclictest	2101263	-21	kworker/u8:0+flush-8:0	22:10:34	1
1960788	99	48	37,8	cyclictest	2060906	-21	ntpq	20:45:39	1
1960786	99	48	40,6	cyclictest	2206424	-21	kworker/u8:2+events_unbound	00:00:01	0
1960786	99	48	35,10	cyclictest	2135620	-21	ntpq	22:00:37	0
1960792	99	46	37,6	cyclictest	1704890	-21	systemd-journal	19:35:01	2
1960788	99	46	41,4	cyclictest	2166043	-21	kworker/u8:3+flush-8:0	22:40:40	1
1960786	99	46	39,5	cyclictest	2125561	-21	kworker/u8:1+flush-8:0	22:20:01	0
2267777	2	45	0,3	sleep3	75	-21	kworker/3:1-events	00:15:34	3
1960788	99	45	41,3	cyclictest	2076871	-21	kworker/u8:2+flush-8:0	21:45:29	1
1960788	99	45	39,4	cyclictest	2086994	-21	kworker/u8:1+events_unbound	21:30:36	1
1960788	99	45	39,4	cyclictest	2052513	-21	kworker/u8:3+flush-8:0	21:10:40	1
1960786	99	45	35,7	cyclictest	2256014	-21	latency_hist	00:05:01	0
1960792	99	44	33,8	cyclictest	1704890	-21	systemd-journal	22:55:00	2
1960788	99	44	40,3	cyclictest	2101263	-21	kworker/u8:0+flush-8:0	22:35:27	1
1960788	99	44	39,3	cyclictest	2052513	-21	kworker/u8:3+flush-8:0	21:20:40	1
1960786	99	44	41,2	cyclictest	85	50	irq/124-ahci[0000:00:12.0]	21:35:40	0
1960786	99	44	41,2	cyclictest	85	50	irq/124-ahci[0000:00:12.0]	21:35:39	0
1960786	99	44	39,4	cyclictest	2251243	-21	kworker/u8:4+flush-8:0	00:20:32	0
1960786	99	44	34,8	cyclictest	2092260	-21	diskstats	21:20:29	0
1960786	99	44	34,7	cyclictest	1704890	-21	systemd-journal	22:45:36	0
1960786	99	43	34,7	cyclictest	2206424	-21	kworker/u8:2+flush-8:0	23:40:35	0
1960792	99	42	31,8	cyclictest	2126857	-21	cp	21:55:02	2
1960788	99	42	35,5	cyclictest	2002451	-21	kworker/u8:2+flush-8:0	20:35:40	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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