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 Aug 08, 2026 12:44:50)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
465128	99	61	50,7	cyclictest	512767	-21	sh	09:25:01	1
465136	99	55	48,5	cyclictest	530246	-21	kworker/u8:0+events_unbound	10:45:53	3
465133	99	47	37,7	cyclictest	511066	-21	sendmail	09:20:01	2
465128	99	47	36,7	cyclictest	516392	-21	kworker/u8:0+events_unbound	09:35:12	1
465136	99	46	36,6	cyclictest	482925	-21	awk	08:00:01	3
465133	99	45	38,5	cyclictest	512763	-21	cron	09:25:01	2
465124	99	45	38,4	cyclictest	511055	-21	cron	09:20:00	0
465136	99	43	36,5	cyclictest	551205	-21	kworker/u8:3+events_unbound	11:46:01	3
465128	99	43	32,7	cyclictest	575645	-21	apt	12:24:59	1
465128	99	42	33,5	cyclictest	542609	-21	munin-run	10:50:01	1
465128	99	41	29,8	cyclictest	508925	-21	grep	09:10:26	1
465136	99	40	27,8	cyclictest	472264	-21	grep	07:25:27	3
465128	99	40	33,4	cyclictest	561802	-21	munin-plugin-st	11:45:00	1
465124	99	40	31,6	cyclictest	204	-21	dbus-daemon	07:15:04	0
465136	99	39	21,6	cyclictest	13	1	rcu_preempt	08:20:13	3
465133	99	39	33,4	cyclictest	517877	-21	cron	09:40:01	2
465128	99	39	28,8	cyclictest	572214	-21	cron	12:15:00	1
465136	99	38	31,5	cyclictest	505137	-21	kworker/u8:1+events_unbound	09:15:41	3
465136	99	38	30,5	cyclictest	538767	-21	munin-run	10:39:59	3
465136	99	38	30,5	cyclictest	538767	-21	munin-run	10:39:59	3
465133	99	38	28,6	cyclictest	0	-21	swapper/2	11:10:01	2
465136	99	36	30,4	cyclictest	530246	-21	kworker/u8:0+events_unbound	10:15:46	3
465136	99	36	28,4	cyclictest	0	-21	swapper/3	11:35:16	3
465133	99	36	29,5	cyclictest	479289	-21	kworker/u8:2+events_unbound	07:55:22	2
465133	99	36	28,4	cyclictest	0	-21	swapper/2	10:50:00	2
465133	99	36	27,6	cyclictest	493581	-21	munin-run	08:30:01	2
465128	99	36	28,4	cyclictest	0	-21	swapper/1	07:40:08	1
465128	99	36	28,4	cyclictest	0	-21	swapper/1	07:40:07	1
465128	99	36	27,5	cyclictest	0	-21	swapper/1	10:20:01	1
465128	99	36	26,7	cyclictest	0	-21	swapper/1	08:20:01	1
465124	99	36	28,4	cyclictest	522992	-21	audit_send_reply	09:55:01	0
465124	99	36	28,4	cyclictest	0	-21	swapper/0	10:20:01	0
465124	99	36	26,6	cyclictest	0	-21	swapper/0	12:30:00	0
465136	99	35	27,5	cyclictest	495479	-21	cron	08:35:01	3
465136	99	35	27,5	cyclictest	495479	-21	cron	08:35:01	3
465136	99	35	16,6	cyclictest	13	1	rcu_preempt	09:50:11	3
465133	99	35	24,7	cyclictest	503809	-21	grep	08:55:26	2
465124	99	35	28,4	cyclictest	500824	-21	munin-plugin-st	08:50:00	0
465124	99	35	24,7	cyclictest	0	-21	swapper/0	10:40:00	0
465124	99	35	24,7	cyclictest	0	-21	swapper/0	10:40:00	0
465136	99	34	4,17	cyclictest	40	-21	ksoftirqd/3	10:05:13	3
465136	99	34	4,17	cyclictest	40	-21	ksoftirqd/3	10:05:12	3
465136	99	34	18,6	cyclictest	520981	-21	kworker/u8:0+events_unbound	09:56:38	3
465133	99	34	27,4	cyclictest	0	-21	swapper/2	11:15:54	2
465133	99	34	26,4	cyclictest	466739	-21	cron	07:15:01	2
465128	99	34	24,7	cyclictest	482492	-21	grep	07:55:26	1
465124	99	34	25,5	cyclictest	208	-21	systemd-logind	07:25:07	0
465124	99	34	22,8	cyclictest	204	-21	dbus-daemon	07:55:22	0
465136	99	33	25,6	cyclictest	479289	-21	kworker/u8:2+events_unbound	07:54:42	3
465136	99	33	24,5	cyclictest	0	-21	swapper/3	12:05:26	3
465136	99	33	23,7	cyclictest	489833	-21	kworker/u8:2-ext4-rsv-conversion	08:30:01	3
465136	99	33	23,6	cyclictest	0	-21	swapper/3	12:25:27	3
465136	99	33	22,8	cyclictest	438	-21	cron	08:54:59	3
465136	99	33	22,7	cyclictest	0	-21	swapper/3	08:40:25	3
465136	99	33	22,7	cyclictest	0	-21	swapper/3	08:40:25	3
465133	99	33	27,3	cyclictest	0	-21	swapper/2	12:15:27	2
465133	99	33	26,4	cyclictest	522983	-21	cron	09:55:00	2
465133	99	33	26,4	cyclictest	0	-21	swapper/2	12:00:28	2
465133	99	33	25,4	cyclictest	0	-21	swapper/2	11:40:59	2
465128	99	33	25,4	cyclictest	0	-21	swapper/1	11:30:18	1
465128	99	33	25,4	cyclictest	0	-21	swapper/1	11:30:17	1
465128	99	33	25,4	cyclictest	0	-21	swapper/1	09:55:16	1
465128	99	33	22,7	cyclictest	500808	-21	cron	08:49:59	1
465128	99	33	21,8	cyclictest	507270	-21	sshd	09:05:38	1
465124	99	33	26,3	cyclictest	0	-21	swapper/0	07:45:15	0
465124	99	33	23,7	cyclictest	493774	-21	apt-key	08:30:02	0
465124	99	33	23,6	cyclictest	0	-21	swapper/0	09:45:25	0
465136	99	32	26,4	cyclictest	544255	-21	kworker/u8:0+events_unbound	11:00:54	3
465136	99	32	23,5	cyclictest	568345	-21	grep	12:00:28	3
465136	99	32	20,7	cyclictest	0	-21	swapper/3	08:40:00	3
465136	99	32	20,7	cyclictest	0	-21	swapper/3	08:40:00	3
465133	99	32	24,4	cyclictest	0	-21	swapper/2	07:45:14	2
465133	99	32	22,6	cyclictest	545760	-21	grep	10:55:29	2
465128	99	32	5,4	cyclictest	13	1	rcu_preempt	10:50:11	1
465128	99	32	26,4	cyclictest	547863	-21	kworker/u8:2+events_unbound	11:05:55	1
465128	99	32	25,3	cyclictest	0	-21	swapper/1	10:40:20	1
465124	99	32	7,14	cyclictest	13	1	rcu_preempt	10:30:13	0
465124	99	32	26,3	cyclictest	0	-21	swapper/0	07:40:01	0
465124	99	32	12,9	cyclictest	13	1	rcu_preempt	09:40:13	0
465136	99	31	25,4	cyclictest	551205	-21	kworker/u8:3+events_unbound	11:50:19	3
465136	99	31	21,5	cyclictest	0	-21	swapper/3	10:45:00	3
465136	99	31	15,6	cyclictest	512619	-21	kworker/u8:1+events_unbound	09:32:06	3
465133	99	31	7,4	cyclictest	543050	-21	cpu	10:50:13	2
465133	99	31	25,3	cyclictest	0	-21	swapper/2	11:50:26	2
465133	99	31	21,7	cyclictest	521287	-21	sh	09:50:01	2
465128	99	31	26,3	cyclictest	544255	-21	kworker/u8:0+events_unbound	10:55:51	1
465124	99	31	25,3	cyclictest	0	-21	swapper/0	12:20:00	0
465124	99	31	23,4	cyclictest	0	-21	swapper/0	08:40:01	0
465124	99	31	23,4	cyclictest	0	-21	swapper/0	08:40:00	0
465124	99	31	22,4	cyclictest	0	-21	swapper/0	12:35:17	0
465136	99	30	24,4	cyclictest	484757	-21	kworker/u8:2+events_unbound	08:05:22	3
465136	99	30	24,4	cyclictest	472578	-21	kworker/u8:0+events_unbound	07:40:43	3
465136	99	30	24,4	cyclictest	472578	-21	kworker/u8:0+events_unbound	07:40:42	3
465136	99	30	23,4	cyclictest	0	-21	swapper/3	11:10:00	3
465136	99	30	21,7	cyclictest	562004	-21	sort	11:45:00	3
465136	99	30	14,10	cyclictest	39	1	ktimers/3	09:40:14	3
465136	99	30	12,11	cyclictest	40	-21	ksoftirqd/3	07:15:26	3
465128	99	30	23,4	cyclictest	538763	-21	kthreadd	10:40:00	1
465128	99	30	23,4	cyclictest	538763	-21	kthreadd	10:40:00	1
465128	99	30	22,4	cyclictest	0	-21	swapper/1	11:35:27	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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