OSADL QA Farm on Real-time of Mainline Linux

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

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
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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: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackbslot5s.osadl.org (updated Sat Feb 21, 2026 00:44:46)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
800995	99	63	56,5	cyclictest	909095	-21	kworker/u8:0+events_unbound	00:30:03	0
801007	99	48	37,8	cyclictest	899420	-21	grep	23:50:24	3
801004	99	46	24,13	cyclictest	909095	-21	kworker/u8:0+events_unbound	00:26:39	2
801007	99	45	30,4	cyclictest	819997	-21	kworker/u8:0+events_unbound	20:16:02	3
801007	99	44	24,5	cyclictest	889841	-21	kworker/u8:2+events_unbound	23:33:40	3
801004	99	44	34,7	cyclictest	898537	-21	fschecks_count	23:50:15	2
801000	99	44	37,4	cyclictest	880634	-21	munin-plugin-st	22:59:59	1
801004	99	43	31,8	cyclictest	906721	-21	grep	00:10:25	2
801004	99	43	31,8	cyclictest	906721	-21	grep	00:10:25	2
800995	99	43	34,6	cyclictest	847942	-21	munin-plugin-st	21:25:00	0
800995	99	43	34,6	cyclictest	847942	-21	munin-plugin-st	21:24:59	0
800995	99	43	32,7	cyclictest	813950	-21	fschecks_time	19:45:15	0
801007	99	42	35,5	cyclictest	882575	-21	kworker/u8:0+events_unbound	23:21:34	3
801007	99	42	33,5	cyclictest	823969	-21	cron	20:15:01	3
801004	99	42	34,5	cyclictest	832524	-21	munin-plugin-st	20:40:01	2
801007	99	41	30,6	cyclictest	811790	-21	latency_hist	19:40:01	3
801007	99	41	28,9	cyclictest	915937	-21	seq	00:40:00	3
801004	99	41	31,6	cyclictest	0	-21	swapper/2	21:25:00	2
801004	99	41	31,6	cyclictest	0	-21	swapper/2	21:25:00	2
800995	99	41	30,6	cyclictest	0	-21	swapper/0	20:15:01	0
801007	99	40	34,4	cyclictest	819997	-21	kworker/u8:0+events_unbound	20:21:04	3
801000	99	40	31,6	cyclictest	856847	-21	fschecks_count	21:50:16	1
801000	99	40	30,6	cyclictest	0	-21	swapper/1	21:50:01	1
800995	99	40	30,6	cyclictest	0	-21	swapper/0	20:05:01	0
801007	99	39	30,7	cyclictest	905151	-21	kworker/u8:0+events_unbound	00:13:25	3
801007	99	39	30,7	cyclictest	905151	-21	kworker/u8:0+events_unbound	00:13:25	3
801007	99	39	29,6	cyclictest	913731	-21	unixbench_multi	00:30:26	3
801004	99	39	32,4	cyclictest	866953	-21	munin-plugin-st	22:20:00	2
800995	99	39	31,3	cyclictest	0	-21	swapper/0	23:20:01	0
801007	99	38	31,5	cyclictest	854660	-21	kworker/u8:0+events_unbound	21:46:17	3
801007	99	38	26,7	cyclictest	849224	-21	grep	21:25:25	3
801000	99	38	32,4	cyclictest	866953	-21	munin-plugin-st	22:20:00	1
801000	99	38	31,4	cyclictest	846201	-21	cron	21:20:00	1
800995	99	38	29,6	cyclictest	811325	-21	unixbench_multi	19:35:24	0
801007	99	37	30,4	cyclictest	881903	-21	unixbench_multi	23:00:23	3
801007	99	37	27,7	cyclictest	873800	-21	idleruntime-cro	22:40:00	3
801007	99	37	27,6	cyclictest	0	-21	swapper/3	22:45:00	3
801007	99	37	26,5	cyclictest	0	-21	swapper/3	21:00:25	3
801007	99	37	25,8	cyclictest	902230	-21	fschecks_time	00:00:16	3
801004	99	37	31,4	cyclictest	889420	-21	munin-plugin-st	23:25:01	2
801004	99	37	31,4	cyclictest	808252	-21	kworker/u8:0+events_unbound	19:32:41	2
800995	99	37	27,6	cyclictest	0	-21	swapper/0	22:00:26	0
801007	99	36	28,5	cyclictest	859433	-21	unixbench_multi	21:55:25	3
801007	99	36	25,5	cyclictest	0	-21	swapper/3	00:18:25	3
801007	99	36	24,8	cyclictest	868193	-21	grep	22:20:24	3
801007	99	36	24,8	cyclictest	835463	-21	grep	20:45:26	3
801004	99	36	28,4	cyclictest	0	-21	swapper/2	19:25:24	2
801004	99	36	27,5	cyclictest	0	-21	swapper/2	23:05:00	2
801004	99	36	27,4	cyclictest	0	-21	swapper/2	22:05:15	2
801004	99	36	26,7	cyclictest	802148	-21	grep	19:10:24	2
801004	99	36	18,6	cyclictest	871733	-21	kworker/u8:1+events_unbound	22:32:40	2
801004	99	36	17,4	cyclictest	819997	-21	kworker/u8:0+events_unbound	20:09:45	2
801000	99	36	28,5	cyclictest	0	-21	swapper/1	19:55:01	1
801000	99	36	27,6	cyclictest	864760	-21	grep	22:10:25	1
801000	99	36	24,8	cyclictest	813503	-21	apt	19:45:01	1
801000	99	36	14,11	cyclictest	880612	-21	kworker/u8:1+events_unbound	23:14:36	1
801004	99	35	27,4	cyclictest	0	-21	swapper/2	21:15:25	2
801004	99	35	24,7	cyclictest	904747	-21	grep	00:05:24	2
801004	99	35	24,7	cyclictest	818217	-21	grep	19:55:26	2
801004	99	35	24,7	cyclictest	0	-21	swapper/2	21:30:25	2
801000	99	35	27,5	cyclictest	0	-21	swapper/1	23:40:00	1
800995	99	35	26,5	cyclictest	0	-21	swapper/0	23:59:59	0
801007	99	34	27,5	cyclictest	899635	-21	kworker/u8:2+events_unbound	00:28:32	3
801007	99	34	27,4	cyclictest	863445	-21	latency_hist	22:10:01	3
801007	99	34	25,5	cyclictest	846198	-21	cron	21:20:00	3
801007	99	34	25,5	cyclictest	0	-21	swapper/3	21:10:15	3
801007	99	34	22,6	cyclictest	0	-21	swapper/3	21:20:26	3
801007	99	34	22,6	cyclictest	0	-21	swapper/3	21:20:25	3
801004	99	34	26,4	cyclictest	0	-21	swapper/2	21:50:25	2
801004	99	34	24,6	cyclictest	0	-21	swapper/2	21:40:25	2
801000	99	34	26,3	cyclictest	0	-21	swapper/1	20:30:27	1
801000	99	34	25,5	cyclictest	0	-21	swapper/1	20:25:01	1
801000	99	34	25,4	cyclictest	0	-21	swapper/1	20:15:01	1
800995	99	34	25,6	cyclictest	850030	-21	fschecks_count	21:30:16	0
801007	99	33	4,9	cyclictest	40	-21	ksoftirqd/3	23:45:11	3
801007	99	33	26,5	cyclictest	832432	-21	kworker/u8:1+events_unbound	20:56:09	3
801007	99	33	23,4	cyclictest	0	-21	swapper/3	20:40:01	3
801004	99	33	3,4	cyclictest	13	1	rcu_preempt	23:40:11	2
801004	99	33	22,7	cyclictest	856046	-21	grep	21:45:25	2
801004	99	33	17,6	cyclictest	877081	-21	kworker/u8:1+events_unbound	22:50:15	2
800995	99	33	24,4	cyclictest	0	-21	swapper/0	22:10:22	0
800995	99	33	23,6	cyclictest	0	-21	swapper/0	21:15:25	0
800995	99	33	22,8	cyclictest	12	1	ktimers/0	19:15:12	0
800995	99	33	21,9	cyclictest	813160	-21	sshd	19:40:56	0
801007	99	32	23,7	cyclictest	39	1	ktimers/3	20:00:11	3
801007	99	32	23,6	cyclictest	904767	-21	unixbench_multi	00:05:25	3
801007	99	32	23,4	cyclictest	0	-21	swapper/3	23:15:01	3
801007	99	32	22,5	cyclictest	0	-21	swapper/3	21:40:16	3
801007	99	32	21,7	cyclictest	883655	-21	grep	23:05:24	3
801007	99	32	20,8	cyclictest	818154	-21	grep	19:55:25	3
801007	99	32	19,9	cyclictest	1	-21	systemd	19:50:58	3
801007	99	32	13,6	cyclictest	13	1	rcu_preempt	19:20:23	3
801004	99	32	23,6	cyclictest	0	-21	swapper/2	00:25:00	2
801004	99	32	22,7	cyclictest	31	1	ktimers/2	23:30:12	2
801004	99	32	22,6	cyclictest	0	-21	swapper/2	21:55:25	2
801004	99	32	21,7	cyclictest	0	-21	swapper/2	19:15:16	2
801004	99	32	19,4	cyclictest	889841	-21	kworker/u8:2+events_unbound	23:27:56	2
801004	99	32	17,5	cyclictest	870016	-21	kworker/u8:0+events_unbound	22:27:48	2
801004	99	32	13,6	cyclictest	806500	-21	kworker/u8:1+events_unbound	19:38:11	2
801000	99	32	25,4	cyclictest	0	-21	swapper/1	20:40:25	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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