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 Fri Sep 04, 2026 12:44:48)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1082820	99	50	42,6	cyclictest	1109238	-21	kworker/u8:0+events_unbound	08:24:50	1
1082824	99	47	38,5	cyclictest	1100614	-21	munin-run	08:00:00	2
1082820	99	47	26,14	cyclictest	13	1	rcu_preempt	10:00:19	1
1082820	99	46	37,6	cyclictest	1179459	-21	unixbench_multi	11:45:23	1
1082820	99	45	39,4	cyclictest	1121351	-21	kworker/u8:1+events_unbound	09:45:01	1
1082820	99	45	38,5	cyclictest	1107495	-21	kworker/u8:1+events_unbound	08:19:50	1
1082824	99	44	38,4	cyclictest	1159180	-21	kworker/u8:1+events_unbound	11:05:22	2
1082820	99	43	32,7	cyclictest	1096767	-21	grep	07:45:25	1
1082820	99	43	28,4	cyclictest	13	1	rcu_preempt	09:57:17	1
1082820	99	43	28,4	cyclictest	13	1	rcu_preempt	09:57:17	1
1082829	99	42	36,3	cyclictest	0	-21	swapper/3	11:20:01	3
1082829	99	42	35,4	cyclictest	1116392	-21	cron	08:45:00	3
1082829	99	42	33,5	cyclictest	1104659	-21	fschecks_time	08:10:15	3
1082829	99	42	32,6	cyclictest	0	-21	swapper/3	11:45:00	3
1082824	99	42	28,11	cyclictest	31	1	ktimers/2	12:20:14	2
1082820	99	42	9,7	cyclictest	24	-21	ksoftirqd/1	07:10:26	1
1082820	99	41	25,4	cyclictest	13	1	rcu_preempt	10:24:45	1
1082820	99	41	24,4	cyclictest	1098541	-21	kworker/u8:0-events_freezable_power_	08:02:54	1
1082820	99	41	22,5	cyclictest	13	1	rcu_preempt	08:46:13	1
1082815	99	41	32,5	cyclictest	1143698	-21	grep	10:05:00	0
1082815	99	41	32,5	cyclictest	0	-21	swapper/0	12:35:01	0
1082829	99	40	34,4	cyclictest	1159180	-21	kworker/u8:1+events_unbound	11:10:23	3
1082824	99	40	34,4	cyclictest	1153584	-21	kworker/u8:0+events_unbound	11:00:22	2
1082824	99	40	27,8	cyclictest	0	-21	swapper/2	11:30:01	2
1082820	99	40	31,6	cyclictest	1114688	-21	grep	08:40:00	1
1082815	99	40	31,4	cyclictest	0	-21	swapper/0	11:35:00	0
1082824	99	39	33,4	cyclictest	1197191	-21	munin-plugin-st	12:40:00	2
1082820	99	39	27,7	cyclictest	1155350	-21	grep	10:35:25	1
1082820	99	39	21,5	cyclictest	13	1	rcu_preempt	12:15:01	1
1082815	99	39	29,6	cyclictest	0	-21	swapper/0	07:15:00	0
1082815	99	39	28,6	cyclictest	0	-21	swapper/0	11:05:23	0
1082824	99	38	19,6	cyclictest	1121351	-21	kworker/u8:1+events_unbound	09:30:02	2
1082820	99	38	26,8	cyclictest	1193362	-21	grep	12:25:26	1
1082820	99	38	26,4	cyclictest	13	1	rcu_preempt	10:45:18	1
1082820	99	38	26,4	cyclictest	13	1	rcu_preempt	10:45:18	1
1082820	99	38	19,5	cyclictest	13	1	rcu_preempt	08:55:24	1
1082815	99	38	18,11	cyclictest	1121351	-21	kworker/u8:1+events_unbound	09:22:32	0
1082829	99	37	31,4	cyclictest	1148819	-21	sendmail	10:20:01	3
1082829	99	37	29,5	cyclictest	1197174	-21	cron	12:40:01	3
1082829	99	37	22,4	cyclictest	13	1	rcu_preempt	12:12:11	3
1082824	99	37	28,6	cyclictest	0	-21	swapper/2	12:15:01	2
1082824	99	37	26,6	cyclictest	0	-21	swapper/2	07:15:24	2
1082824	99	37	19,5	cyclictest	1111013	-21	kworker/u8:1+events_unbound	08:35:07	2
1082820	99	37	26,6	cyclictest	1121909	-21	fschecks_count	09:00:15	1
1082820	99	37	26,6	cyclictest	0	-21	swapper/1	12:35:22	1
1082820	99	37	25,8	cyclictest	1160685	-21	grep	10:50:28	1
1082820	99	37	24,9	cyclictest	1133444	-21	cron	09:35:01	1
1082815	99	37	28,6	cyclictest	1158791	-21	unixbench_multi	10:45:23	0
1082815	99	37	28,6	cyclictest	1158791	-21	unixbench_multi	10:45:23	0
1082815	99	37	27,6	cyclictest	1179456	-21	grep	11:45:24	0
1082815	99	37	20,11	cyclictest	1119606	-21	kworker/u8:0+events_unbound	08:56:38	0
1082829	99	36	26,6	cyclictest	0	-21	swapper/3	10:00:26	3
1082829	99	36	26,6	cyclictest	0	-21	swapper/3	07:20:16	3
1082829	99	36	25,7	cyclictest	0	-21	swapper/3	10:25:15	3
1082829	99	36	19,11	cyclictest	1121351	-21	kworker/u8:1+events_unbound	09:35:21	3
1082829	99	36	16,13	cyclictest	1084287	-21	kworker/u8:3+events_unbound	07:25:24	3
1082824	99	36	27,6	cyclictest	0	-21	swapper/2	09:05:15	2
1082824	99	36	21,8	cyclictest	13	1	rcu_preempt	10:50:01	2
1082824	99	36	21,8	cyclictest	13	1	rcu_preempt	10:50:01	2
1082820	99	36	30,4	cyclictest	1090340	-21	kworker/u8:0+events_unbound	07:38:41	1
1082820	99	36	25,7	cyclictest	1184594	-21	grep	12:00:26	1
1082820	99	36	12,4	cyclictest	13	1	rcu_preempt	07:25:17	1
1082815	99	36	28,4	cyclictest	0	-21	swapper/0	12:40:01	0
1082815	99	36	24,8	cyclictest	1111059	-21	cron	08:30:01	0
1082815	99	36	21,12	cyclictest	12	1	ktimers/0	07:35:10	0
1082815	99	36	19,5	cyclictest	1123151	-21	kworker/u8:2+events_unbound	09:13:53	0
1082829	99	35	29,4	cyclictest	1185047	-21	cron	12:05:00	3
1082829	99	35	27,4	cyclictest	0	-21	swapper/3	11:39:59	3
1082829	99	35	26,6	cyclictest	1181622	-21	apt	11:55:00	3
1082829	99	35	25,6	cyclictest	0	-21	swapper/3	10:50:18	3
1082829	99	35	25,6	cyclictest	0	-21	swapper/3	07:15:24	3
1082829	99	35	25,4	cyclictest	1116148	-21	kworker/u8:1+events_unbound	08:45:11	3
1082829	99	35	16,5	cyclictest	1116148	-21	kworker/u8:1+events_unbound	08:51:34	3
1082824	99	35	29,4	cyclictest	1084287	-21	kworker/u8:3+events_unbound	07:24:40	2
1082824	99	35	27,4	cyclictest	0	-21	swapper/2	08:40:15	2
1082824	99	35	26,6	cyclictest	0	-21	swapper/2	09:40:00	2
1082824	99	35	23,7	cyclictest	0	-21	swapper/2	10:40:25	2
1082824	99	35	18,7	cyclictest	13	1	rcu_preempt	10:23:52	2
1082824	99	35	14,12	cyclictest	1173021	-21	kworker/u8:2+events_unbound	12:25:19	2
1082820	99	35	29,4	cyclictest	1166138	-21	kworker/u8:0+events_unbound	11:15:26	1
1082820	99	35	27,4	cyclictest	0	-21	swapper/1	08:25:25	1
1082820	99	35	25,5	cyclictest	0	-21	swapper/1	08:10:16	1
1082820	99	35	11,5	cyclictest	13	1	rcu_preempt	10:40:15	1
1082815	99	35	22,10	cyclictest	13	1	rcu_preempt	08:45:01	0
1082829	99	34	27,3	cyclictest	0	-21	swapper/3	08:00:01	3
1082829	99	34	24,6	cyclictest	1182859	-21	grep	11:55:26	3
1082829	99	34	24,6	cyclictest	1182859	-21	grep	11:55:25	3
1082829	99	34	21,9	cyclictest	39	1	ktimers/3	09:55:12	3
1082829	99	34	21,9	cyclictest	39	1	ktimers/3	09:55:12	3
1082829	99	34	17,5	cyclictest	13	1	rcu_preempt	09:15:01	3
1082829	99	34	17,5	cyclictest	1121351	-21	kworker/u8:1+events_unbound	09:08:43	3
1082829	99	34	17,10	cyclictest	1121351	-21	kworker/u8:1+events_unbound	09:31:45	3
1082824	99	34	27,4	cyclictest	0	-21	swapper/2	10:35:00	2
1082824	99	34	24,6	cyclictest	0	-21	swapper/2	12:00:16	2
1082824	99	34	23,7	cyclictest	0	-21	swapper/2	07:30:24	2
1082824	99	34	22,5	cyclictest	1104681	-21	kworker/u8:3+events_unbound	08:29:50	2
1082824	99	34	19,7	cyclictest	13	1	rcu_preempt	07:35:24	2
1082820	99	34	28,4	cyclictest	1166138	-21	kworker/u8:0+events_unbound	11:39:41	1
1082820	99	34	23,6	cyclictest	0	-21	swapper/1	12:15:00	1
1082820	99	34	22,8	cyclictest	1	-21	systemd	11:50:31	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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