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 Thu Jan 22, 2026 00:44:49)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
985523	99	57	43,11	cyclictest	23	1	ktimers/1	00:00:11	1
985519	99	50	36,11	cyclictest	12	1	ktimers/0	21:55:12	0
985531	99	49	37,6	cyclictest	1077064	-21	kworker/u8:1+events_unbound	23:41:54	3
985519	99	48	39,6	cyclictest	1057854	-21	grep	22:35:24	0
985523	99	47	39,5	cyclictest	1037586	-21	munin-plugin-st	21:40:00	1
985531	99	46	38,5	cyclictest	208	-21	systemd-logind	22:21:46	3
985528	99	45	38,5	cyclictest	1092918	-21	kworker/u8:2+events_unbound	00:18:38	2
985519	99	45	31,11	cyclictest	12	1	ktimers/0	00:25:09	0
985519	99	45	31,11	cyclictest	12	1	ktimers/0	00:25:09	0
985531	99	44	36,5	cyclictest	1049978	-21	fschecks_time	22:15:15	3
985528	99	44	37,4	cyclictest	1022175	-21	cron	20:55:00	2
985528	99	42	35,5	cyclictest	1066781	-21	kworker/u8:2+events_unbound	23:16:53	2
985528	99	42	32,5	cyclictest	0	-21	swapper/2	00:23:40	2
985528	99	42	32,5	cyclictest	0	-21	swapper/2	00:23:40	2
985528	99	42	32,4	cyclictest	999731	-21	kworker/u8:2+events_unbound	19:56:36	2
985523	99	42	36,4	cyclictest	1012150	-21	kworker/u8:0+events_unbound	20:31:37	1
985519	99	42	30,8	cyclictest	1028586	-21	grep	21:10:24	0
985531	99	41	34,5	cyclictest	1066781	-21	kworker/u8:2+events_unbound	23:11:52	3
985531	99	41	26,4	cyclictest	1087814	-21	kworker/u8:1+events_unbound	00:13:36	3
985523	99	41	30,7	cyclictest	0	-21	swapper/1	00:14:59	1
985519	99	41	9,4	cyclictest	1081229	2	uniq	23:45:17	0
985519	99	41	30,7	cyclictest	1099773	-21	grep	00:35:26	0
985531	99	40	28,8	cyclictest	1001005	-21	grep	19:50:24	3
985528	99	40	34,4	cyclictest	986794	-21	kworker/u8:2+events_unbound	19:11:28	2
985528	99	40	31,5	cyclictest	208	-21	systemd-logind	00:38:41	2
985523	99	40	34,4	cyclictest	1094689	-21	kworker/u8:0+events_unbound	00:26:42	1
985523	99	40	34,4	cyclictest	1094689	-21	kworker/u8:0+events_unbound	00:26:42	1
985523	99	40	27,9	cyclictest	23	1	ktimers/1	21:05:13	1
985519	99	40	32,5	cyclictest	1093182	-21	sendmail	00:20:00	0
985531	99	39	33,4	cyclictest	994680	-21	kworker/u8:3+events_unbound	19:36:31	3
985531	99	39	30,6	cyclictest	999329	-21	unixbench_singl	19:45:26	3
985523	99	39	29,7	cyclictest	1059578	-21	grep	22:40:23	1
985531	99	38	31,4	cyclictest	1100247	-21	latency_hist	00:40:00	3
985531	99	38	28,7	cyclictest	1025140	-21	grep	21:00:27	3
985528	99	38	32,4	cyclictest	438	-21	cron	23:10:01	2
985528	99	38	28,6	cyclictest	0	-21	swapper/2	21:20:00	2
985523	99	38	27,8	cyclictest	1057918	-21	grep	22:35:24	1
985531	99	37	25,8	cyclictest	1092688	-21	grep	00:15:25	3
985531	99	37	24,5	cyclictest	13	1	rcu_preempt	20:50:00	3
985531	99	37	17,13	cyclictest	13	1	rcu_preempt	22:05:02	3
985528	99	37	29,5	cyclictest	996316	-21	cron	19:40:00	2
985528	99	37	27,5	cyclictest	0	-21	swapper/2	19:55:01	2
985523	99	37	28,6	cyclictest	0	-21	swapper/1	19:15:02	1
985519	99	37	27,7	cyclictest	12	1	ktimers/0	19:35:13	0
985519	99	37	26,7	cyclictest	0	-21	swapper/0	23:30:01	0
985519	99	37	25,7	cyclictest	1025126	-21	grep	21:00:26	0
985531	99	36	8,15	cyclictest	40	-21	ksoftirqd/3	23:20:24	3
985531	99	36	26,6	cyclictest	0	-21	swapper/3	21:45:26	3
985531	99	36	18,4	cyclictest	13	1	rcu_preempt	21:28:41	3
985531	99	36	18,4	cyclictest	13	1	rcu_preempt	21:28:40	3
985531	99	36	16,4	cyclictest	13	1	rcu_preempt	22:50:00	3
985531	99	36	15,13	cyclictest	13	1	rcu_preempt	23:05:02	3
985528	99	36	27,6	cyclictest	1059580	-21	unixbench_multi	22:40:24	2
985528	99	36	25,7	cyclictest	0	-21	swapper/2	23:55:26	2
985528	99	36	25,7	cyclictest	0	-21	swapper/2	00:10:00	2
985528	99	36	1,12	cyclictest	0	-21	swapper/2	22:35:12	2
985523	99	36	28,4	cyclictest	0	-21	swapper/1	20:20:25	1
985523	99	36	24,8	cyclictest	1030734	-21	sh	21:20:00	1
985519	99	36	25,6	cyclictest	0	-21	swapper/0	21:20:15	0
985531	99	35	27,4	cyclictest	0	-21	swapper/3	23:15:16	3
985531	99	35	24,4	cyclictest	13	1	rcu_preempt	22:40:55	3
985528	99	35	28,4	cyclictest	0	-21	swapper/2	20:20:15	2
985528	99	35	27,4	cyclictest	0	-21	swapper/2	20:55:15	2
985523	99	35	26,4	cyclictest	0	-21	swapper/1	21:00:16	1
985523	99	35	25,6	cyclictest	0	-21	swapper/1	23:55:00	1
985523	99	35	24,7	cyclictest	0	-21	swapper/1	20:05:25	1
985519	99	35	27,4	cyclictest	0	-21	swapper/0	23:35:00	0
985531	99	34	25,6	cyclictest	0	-21	swapper/3	22:50:24	3
985531	99	34	23,5	cyclictest	13	1	rcu_preempt	19:34:22	3
985531	99	34	22,5	cyclictest	13	1	rcu_preempt	23:07:40	3
985531	99	34	15,11	cyclictest	13	1	rcu_preempt	22:32:54	3
985531	99	34	10,7	cyclictest	40	-21	ksoftirqd/3	21:55:00	3
985528	99	34	28,4	cyclictest	1006245	-21	kworker/u8:1+events_unbound	20:10:40	2
985528	99	34	25,4	cyclictest	0	-21	swapper/2	23:35:16	2
985528	99	34	25,4	cyclictest	0	-21	swapper/2	23:31:54	2
985528	99	34	18,9	cyclictest	1032353	-21	kworker/u8:1+events_unbound	21:37:07	2
985523	99	34	23,7	cyclictest	1028539	-21	grep	21:10:24	1
985519	99	34	26,3	cyclictest	0	-21	swapper/0	21:00:01	0
985519	99	34	24,5	cyclictest	0	-21	swapper/0	22:30:25	0
985531	99	33	8,6	cyclictest	40	-21	ksoftirqd/3	19:55:25	3
985531	99	33	26,3	cyclictest	0	-21	swapper/3	21:30:25	3
985531	99	33	26,3	cyclictest	0	-21	swapper/3	21:30:25	3
985531	99	33	25,5	cyclictest	985866	-21	fschecks_time	19:10:15	3
985531	99	33	18,4	cyclictest	13	1	rcu_preempt	22:05:34	3
985531	99	33	15,8	cyclictest	1092918	-21	kworker/u8:2+events_unbound	00:22:30	3
985531	99	33	15,8	cyclictest	1092918	-21	kworker/u8:2+events_unbound	00:22:30	3
985531	99	33	15,10	cyclictest	13	1	rcu_preempt	21:35:20	3
985531	99	33	14,9	cyclictest	13	1	rcu_preempt	23:55:46	3
985528	99	33	26,3	cyclictest	0	-21	swapper/2	22:20:01	2
985528	99	33	25,4	cyclictest	1015713	-21	fschecks_count	20:35:15	2
985528	99	33	16,4	cyclictest	1087814	-21	kworker/u8:1+events_unbound	00:33:04	2
985523	99	33	5,4	cyclictest	13	1	rcu_preempt	23:25:12	1
985523	99	33	27,4	cyclictest	1072228	-21	munin-plugin-st	23:20:01	1
985523	99	33	25,4	cyclictest	0	-21	swapper/1	20:55:24	1
985523	99	33	24,6	cyclictest	0	-21	swapper/1	00:10:01	1
985523	99	33	16,6	cyclictest	1016941	-21	kworker/u8:2+events_unbound	20:43:47	1
985523	99	33	12,11	cyclictest	978251	-21	kworker/1:0+events	21:40:19	1
985523	99	33	12,11	cyclictest	978251	-21	kworker/1:0+events	21:40:19	1
985519	99	33	24,6	cyclictest	1059640	-21	grep	22:40:23	0
985519	99	33	24,6	cyclictest	0	-21	swapper/0	20:40:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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