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 01, 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
832455	2	329	0,6	sleep3	45	1	irq_work/3	19:30:42	3
1032954	2	58	0,4	chrt	0	-21	swapper/3	22:50:45	3
810166	99	55	45,8	cyclictest	995938	-21	diskstats	22:15:42	0
810166	99	54	42,9	cyclictest	911169	-21	apt-get	20:50:00	0
810168	99	53	46,5	cyclictest	1044210	-21	ntpq	23:00:48	1
810166	99	52	42,8	cyclictest	875710	-21	ntpq	20:10:55	0
1025153	2	52	0,3	chrt	0	-21	swapper/0	22:45:01	0
810166	99	51	46,3	cyclictest	790003	-21	kworker/u8:2+flush-8:0	20:00:44	0
810166	99	50	45,4	cyclictest	767441	-21	kworker/u8:3+events_unbound	19:35:03	0
810166	99	49	39,8	cyclictest	810591	-21	diskstats	19:10:42	0
1003095	2	49	0,4	chrt	0	-21	swapper/0	22:20:46	0
810168	99	48	41,5	cyclictest	1079272	-21	ntpq	23:35:49	1
810168	99	48	39,7	cyclictest	905440	-21	ntpq	20:40:51	1
810166	99	48	39,7	cyclictest	1034168	-21	ntpq	22:50:52	0
810166	99	48	1,45	cyclictest	1020157	-21	munin-run	22:40:00	0
810166	99	47	42,4	cyclictest	1038668	-21	kworker/u8:1+flush-8:0	23:05:56	0
810166	99	47	42,3	cyclictest	892045	-21	kworker/u8:0+flush-8:0	22:30:45	0
810166	99	47	42,3	cyclictest	1100169	-21	kworker/u8:2+flush-8:0	00:35:44	0
810171	99	46	34,10	cyclictest	1704890	-21	systemd-journal	23:12:48	2
810168	99	46	37,7	cyclictest	916629	-21	/usr/sbin/munin	20:55:49	1
810166	99	46	43,1	cyclictest	1038668	-21	kworker/u8:1+events_unbound	23:20:00	0
810166	99	46	38,6	cyclictest	1089119	-21	ntpq	23:45:50	0
810171	99	45	1,40	cyclictest	932025	-21	irqcore	21:10:44	2
810166	99	45	39,4	cyclictest	790003	-21	kworker/u8:2+flush-8:0	19:55:48	0
810166	99	45	38,5	cyclictest	852143	-21	apt-get	19:50:37	0
810166	99	45	38,5	cyclictest	852143	-21	apt-get	19:50:36	0
810166	99	45	35,7	cyclictest	790003	-21	kworker/u8:2+flush-8:0	19:25:51	0
810168	99	44	36,6	cyclictest	1015449	-21	apt-get	22:35:37	1
810168	99	44	33,8	cyclictest	1054994	-21	latency_hist	23:15:01	1
810168	99	44	31,9	cyclictest	1704890	-21	systemd-journal	23:20:58	1
810166	99	44	39,4	cyclictest	985174	-21	kworker/u8:3+events_unbound	22:05:01	0
810166	99	44	37,5	cyclictest	861722	-21	kworker/u8:1+flush-8:0	20:15:52	0
810166	99	44	34,8	cyclictest	1108986	-21	ntpq	00:05:56	0
810168	99	43	36,5	cyclictest	870809	-21	ntpq	20:05:53	1
810166	99	42	36,5	cyclictest	1069712	-21	kworker/u8:3+flush-8:0	23:40:52	0
810166	99	41	37,3	cyclictest	861722	-21	kworker/u8:1+events_unbound	21:00:59	0
810166	99	41	37,3	cyclictest	767441	-21	kworker/u8:3+events_unbound	19:40:59	0
810166	99	41	36,3	cyclictest	1069712	-21	kworker/u8:3+flush-8:0	00:15:46	0
810166	99	41	35,4	cyclictest	985789	-21	apt-get	22:05:40	0
810166	99	41	33,6	cyclictest	767441	-21	kworker/u8:3+flush-8:0	19:30:51	0
1122156	2	41	0,6	sleep2	0	-21	swapper/2	00:25:47	2
810171	99	40	23,15	cyclictest	900914	-21	unixbench_singl	20:35:56	2
810168	99	40	32,6	cyclictest	984635	-21	ntpq	22:00:51	1
810166	99	40	35,4	cyclictest	861722	-21	kworker/u8:1+flush-8:0	21:05:49	0
810166	99	40	34,4	cyclictest	1069712	-21	kworker/u8:3+events_unbound	23:50:51	0
810166	99	40	32,6	cyclictest	1100484	-21	diskstats	00:00:41	0
810166	99	40	32,6	cyclictest	1100484	-21	diskstats	00:00:40	0
810166	99	40	28,4	cyclictest	861722	-21	kworker/u8:1+events_unbound	21:50:53	0
810168	99	39	31,6	cyclictest	975895	-21	apt-get	21:55:34	1
810168	99	39	28,8	cyclictest	911265	-21	cp	20:50:00	1
810166	99	39	33,4	cyclictest	892045	-21	kworker/u8:0+events_unbound	23:35:55	0
810166	99	39	32,5	cyclictest	1038668	-21	kworker/u8:1+flush-8:0	23:00:50	0
810171	99	38	23,13	cyclictest	810426	-21	aten2_r5power_p	19:10:39	2
810168	99	38	29,7	cyclictest	964873	-21	ntpq	21:40:49	1
810166	99	38	34,3	cyclictest	767441	-21	kworker/u8:3+flush-8:0	20:30:56	0
810166	99	38	33,3	cyclictest	861722	-21	kworker/u8:1+flush-8:0	21:35:46	0
810166	99	38	33,3	cyclictest	790003	-21	kworker/u8:2+events_unbound	19:20:57	0
810166	99	38	30,6	cyclictest	817529	-21	diskstats	19:15:38	0
966192	2	37	0,6	sleep1	0	-21	swapper/1	21:45:39	1
810168	99	37	26,9	cyclictest	1704890	-21	systemd-journal	22:16:58	1
810166	99	37	35,1	cyclictest	767441	-21	kworker/u8:3+events_unbound	21:10:41	0
810166	99	37	30,5	cyclictest	955740	-21	kworker/u8:2+flush-8:0	21:40:50	0
810166	99	37	30,5	cyclictest	892045	-21	kworker/u8:0+flush-8:0	22:10:49	0
810166	99	37	26,7	cyclictest	1069712	-21	kworker/u8:3+events_unbound	00:30:37	0
810171	99	36	21,13	cyclictest	881109	-21	unixbench_singl	20:15:59	2
810168	99	36	30,4	cyclictest	1100169	-21	kworker/u8:2+events_unbound	00:30:46	1
810168	99	36	27,7	cyclictest	885529	-21	ntpq	20:20:49	1
810166	99	36	31,3	cyclictest	892045	-21	kworker/u8:0+flush-8:0	20:35:45	0
810166	99	36	31,3	cyclictest	867698	-21	irqrtprio	20:05:45	0
810166	99	36	29,5	cyclictest	892045	-21	kworker/u8:0+flush-8:0	21:15:50	0
810166	99	36	27,6	cyclictest	1040151	-21	latency_hist	23:00:01	0
810171	99	35	19,14	cyclictest	994975	-21	unixbench_multi	22:10:57	2
810168	99	35	28,5	cyclictest	1134596	-21	ntpq	00:35:49	1
810168	99	35	26,7	cyclictest	1114772	-21	ntpq	00:15:46	1
810168	99	35	25,7	cyclictest	1704890	-21	systemd-journal	23:30:59	1
810166	99	35	31,3	cyclictest	1069712	-21	kworker/u8:3+events_unbound	00:26:01	0
810166	99	35	29,4	cyclictest	955740	-21	kworker/u8:2+events_unbound	21:45:40	0
810166	99	35	29,4	cyclictest	892045	-21	kworker/u8:0+flush-8:0	22:25:43	0
810166	99	35	29,4	cyclictest	1038668	-21	kworker/u8:1+flush-8:0	23:30:50	0
810166	99	35	29,4	cyclictest	1038668	-21	kworker/u8:1+flush-8:0	23:10:51	0
810166	99	35	28,5	cyclictest	955740	-21	kworker/u8:2+events_unbound	21:55:47	0
810171	99	34	4,14	cyclictest	0	-21	swapper/2	21:05:21	2
810171	99	34	18,13	cyclictest	837181	-21	apt-key	19:35:01	2
810171	99	34	18,13	cyclictest	1704890	-21	systemd-journal	21:45:01	2
810168	99	34	29,3	cyclictest	1069712	-21	kworker/u8:3+events_unbound	23:55:55	1
810168	99	34	28,4	cyclictest	901287	-21	latency_hist	20:40:00	1
810168	99	34	26,6	cyclictest	1100235	-21	apt-get	00:00:37	1
810168	99	34	26,6	cyclictest	1100235	-21	apt-get	00:00:37	1
810168	99	34	25,7	cyclictest	832083	-21	/usr/sbin/munin	19:30:56	1
810168	99	34	25,7	cyclictest	1024176	-21	ntpq	22:40:50	1
810166	99	34	30,3	cyclictest	790003	-21	kworker/u8:2+events_unbound	20:25:58	0
810166	99	34	27,5	cyclictest	1116056	-21	tr	00:20:41	0
810166	99	34	26,6	cyclictest	892045	-21	kworker/u8:0+flush-8:0	23:55:42	0
810171	99	33	17,15	cyclictest	1020110	-21	sh	22:40:00	2
810171	99	33	1,25	cyclictest	837277	-21	apt-get	19:35:37	2
810168	99	33	27,4	cyclictest	1704890	-21	systemd-journal	21:02:23	1
810168	99	33	25,6	cyclictest	935184	-21	ntpq	21:10:51	1
810166	99	33	29,3	cyclictest	892045	-21	kworker/u8:0+events_unbound	21:25:48	0
810166	99	33	28,4	cyclictest	892045	-21	kworker/u8:0+events_unbound	20:40:55	0
810166	99	33	27,4	cyclictest	892045	-21	kworker/u8:0+flush-8:0	21:30:46	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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