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 Aug 18, 2026 00:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
765992	2	341	0,2	sleep3	48	1	ktimers/3	20:17:50	3
936412	2	334	0,2	sleep3	575	-21	kworker/3:2-events	23:10:01	3
995633	2	84	0,4	chrt	995628	-21	unixbench_multi	00:07:59	2
746571	2	64	0,4	sleep3	575	-21	kworker/3:2-events	19:57:56	3
695470	99	61	56,3	cyclictest	786645	-21	kworker/u8:0+events_unbound	21:02:58	1
695470	99	61	56,3	cyclictest	786645	-21	kworker/u8:0+events_unbound	21:02:58	1
695470	99	61	52,6	cyclictest	936121	-21	kworker/u8:3+events_unbound	23:12:50	1
695470	99	56	49,5	cyclictest	275	-21	systemd-journal	00:10:01	1
695470	99	53	44,7	cyclictest	896216	-21	latency_hist	22:30:00	1
695468	99	53	46,5	cyclictest	965976	-21	apt-get	23:40:01	0
857364	2	52	0,3	chrt	0	-21	swapper/2	21:52:43	2
695478	99	52	43,7	cyclictest	806836	-21	apt-get	21:00:00	2
695470	99	52	39,10	cyclictest	275	-21	systemd-journal	23:27:04	1
888149	2	51	0,2	chrt	47	1	rcuc/3	22:22:46	3
695468	99	51	42,7	cyclictest	717148	-21	latency_hist	19:30:01	0
695470	99	50	45,3	cyclictest	727300	-21	kworker/u8:0+events_unbound	20:15:01	1
695470	99	48	44,3	cyclictest	816960	-21	kworker/u8:2+flush-8:0	21:22:57	1
695470	99	48	42,4	cyclictest	871298	-21	kworker/u8:2+flush-8:0	22:47:57	1
695470	99	48	42,4	cyclictest	871298	-21	kworker/u8:2+flush-8:0	22:47:57	1
695470	99	48	42,4	cyclictest	841562	-21	kworker/u8:4+events_unbound	21:47:56	1
695470	99	48	40,6	cyclictest	961060	-21	kworker/u8:1+flush-8:0	23:37:52	1
947556	2	47	0,5	sleep2	0	-21	swapper/2	23:22:44	2
918724	2	47	0,2	sleep3	575	-21	kworker/3:2+events	22:52:48	3
695470	99	47	43,3	cyclictest	961060	-21	kworker/u8:1+events_unbound	00:32:58	1
695470	99	47	42,3	cyclictest	675733	-21	kworker/u8:1+events_unbound	19:12:51	1
695470	99	47	38,6	cyclictest	781902	-21	latency_hist	20:35:01	1
695470	99	47	33,10	cyclictest	275	-21	systemd-journal	22:03:04	1
695468	99	47	37,7	cyclictest	700342	-21	latency_hist	19:15:01	0
695470	99	46	42,2	cyclictest	653652	-21	kworker/u8:2+events_unbound	19:22:41	1
695470	99	46	41,4	cyclictest	936121	-21	kworker/u8:3+events_unbound	00:22:41	1
695470	99	46	40,5	cyclictest	3558332	-21	kworker/u8:4+flush-8:0	19:27:51	1
695470	99	46	40,4	cyclictest	841562	-21	kworker/u8:4+events_unbound	21:57:39	1
695470	99	46	40,4	cyclictest	792254	-21	kworker/u8:3+flush-8:0	21:08:00	1
695470	99	45	40,3	cyclictest	961060	-21	kworker/u8:1+events_unbound	00:17:42	1
695470	99	45	38,5	cyclictest	801903	-21	latency_hist	20:55:00	1
695468	99	45	37,6	cyclictest	906621	-21	latency_hist	22:40:01	0
695470	99	44	40,3	cyclictest	3558332	-21	kworker/u8:4+events_unbound	20:07:52	1
695470	99	44	39,4	cyclictest	871298	-21	kworker/u8:2+events_unbound	22:52:41	1
695470	99	44	36,6	cyclictest	841562	-21	kworker/u8:4+flush-8:0	21:42:56	1
695470	99	44	33,8	cyclictest	275	-21	systemd-journal	23:40:01	1
695470	99	43	39,3	cyclictest	916331	-21	kworker/u8:1+events_unbound	23:02:41	1
695470	99	43	39,3	cyclictest	792254	-21	kworker/u8:3+events_unbound	21:27:42	1
695470	99	43	37,4	cyclictest	961060	-21	kworker/u8:1+flush-8:0	23:52:58	1
695470	99	43	37,4	cyclictest	792254	-21	kworker/u8:3+events_unbound	21:12:52	1
695470	99	43	36,5	cyclictest	871298	-21	kworker/u8:2+flush-8:0	23:32:54	1
695470	99	42	37,3	cyclictest	871298	-21	kworker/u8:2+flush-8:0	23:17:47	1
695470	99	42	36,4	cyclictest	816960	-21	kworker/u8:2+events_unbound	21:17:49	1
695470	99	41	36,3	cyclictest	871298	-21	kworker/u8:2+events_unbound	22:07:48	1
695470	99	41	36,3	cyclictest	786645	-21	kworker/u8:0+flush-8:0	20:47:54	1
695470	99	41	36,3	cyclictest	766436	-21	kworker/u8:1+events_unbound	21:00:00	1
695470	99	41	35,4	cyclictest	901257	-21	kworker/u8:4+events_unbound	22:37:47	1
695470	99	41	35,4	cyclictest	3558332	-21	kworker/u8:4+events_unbound	20:37:43	1
695470	99	41	33,6	cyclictest	702724	-21	apt-get	19:17:39	1
695470	99	41	33,6	cyclictest	653652	-21	kworker/u8:2+flush-8:0	20:42:51	1
695468	99	41	33,6	cyclictest	986425	-21	/usr/sbin/munin	00:02:50	0
695468	99	41	1,38	cyclictest	1	-21	systemd	21:19:04	0
695470	99	40	35,3	cyclictest	886556	-21	kworker/u8:3+events_unbound	22:25:00	1
695470	99	40	34,5	cyclictest	727300	-21	kworker/u8:0+events_unbound	19:45:02	1
695470	99	40	32,6	cyclictest	961060	-21	kworker/u8:1+events_unbound	00:02:55	1
695470	99	40	31,7	cyclictest	275	-21	systemd-journal	23:45:05	1
695468	99	40	34,5	cyclictest	879115	-21	kworker/u8:0+events_unbound	23:27:42	0
695468	99	40	34,4	cyclictest	841562	-21	kworker/u8:4+flush-8:0	21:57:57	0
695468	99	40	33,5	cyclictest	796231	-21	ntpq	20:47:53	0
695468	99	40	32,6	cyclictest	901412	-21	apt-get	22:35:00	0
695468	99	40	30,8	cyclictest	786061	-21	ntpq	20:37:52	0
695470	99	39	35,3	cyclictest	3558332	-21	kworker/u8:4+events_unbound	20:00:01	1
695470	99	39	34,4	cyclictest	3558332	-21	kworker/u8:4+events_unbound	19:32:44	1
695470	99	39	33,4	cyclictest	879115	-21	kworker/u8:0+flush-8:0	22:42:58	1
695470	99	39	33,4	cyclictest	871298	-21	kworker/u8:2+flush-8:0	22:57:52	1
695468	99	39	33,4	cyclictest	1015740	-21	http	00:30:01	0
695470	99	38	33,4	cyclictest	721983	-21	kworker/u8:1+events_unbound	19:37:40	1
695470	99	38	33,3	cyclictest	871298	-21	kworker/u8:2+events_unbound	23:57:50	1
695470	99	38	31,4	cyclictest	275	-21	systemd-journal	22:19:04	1
695147	2	38	3,9	sleep1	0	-21	swapper/1	19:08:11	1
695470	99	37	32,4	cyclictest	1010768	-21	kworker/u8:0+events_unbound	00:37:56	1
695470	99	37	32,3	cyclictest	861552	-21	kworker/u8:1+events_unbound	22:12:46	1
695470	99	36	30,4	cyclictest	792254	-21	kworker/u8:3+events_unbound	21:32:48	1
695468	99	36	26,8	cyclictest	811263	-21	ntpq	21:02:52	0
695468	99	36	26,8	cyclictest	811263	-21	ntpq	21:02:52	0
695470	99	35	31,3	cyclictest	936121	-21	kworker/u8:3+flush-8:0	00:27:50	1
695470	99	35	30,4	cyclictest	879115	-21	kworker/u8:0+flush-8:0	23:22:44	1
695470	99	35	30,4	cyclictest	766436	-21	kworker/u8:1+events_unbound	20:27:43	1
695468	99	35	29,4	cyclictest	856442	-21	kworker/u8:0+events_unbound	22:02:18	0
695470	99	34	29,3	cyclictest	816960	-21	kworker/u8:2+events_unbound	21:37:48	1
695470	99	34	29,3	cyclictest	766436	-21	kworker/u8:1+flush-8:0	20:17:58	1
695470	99	34	28,4	cyclictest	871298	-21	kworker/u8:2+flush-8:0	00:12:56	1
695470	99	34	27,6	cyclictest	727300	-21	kworker/u8:0+events_unbound	19:42:42	1
695470	99	34	27,5	cyclictest	841562	-21	kworker/u8:4+flush-8:0	21:52:58	1
695470	99	34	26,6	cyclictest	751993	-21	apt-get	20:05:01	1
695468	99	34	24,8	cyclictest	792254	-21	kworker/u8:3+flush-8:0	21:32:47	0
695468	99	34	24,8	cyclictest	1025080	-21	ntpq	00:37:50	0
695470	99	33	26,6	cyclictest	727300	-21	kworker/u8:0+events_unbound	19:52:44	1
695468	99	33	25,6	cyclictest	275	-21	systemd-journal	20:08:04	0
695470	99	32	28,3	cyclictest	871298	-21	kworker/u8:2+flush-8:0	22:30:36	1
695468	99	32	22,8	cyclictest	761400	-21	ntpq	20:12:52	0
695468	99	32	22,4	cyclictest	916331	-21	kworker/u8:1+flush-8:0	23:02:39	0
695478	99	31	21,8	cyclictest	896582	-21	cat	22:30:01	2
695470	99	31	27,3	cyclictest	766436	-21	kworker/u8:1+flush-8:0	20:20:05	1
695468	99	31	26,3	cyclictest	926400	-21	systemd-run	23:00:01	0
695468	99	31	26,3	cyclictest	816927	-21	cron	21:10:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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