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
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: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackbslot5s.osadl.org (updated Sun Nov 23, 2025 12:44:49)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3084009	99	52	24,4	cyclictest	0	-21	swapper/2	07:15:26	2
3084000	99	51	44,5	cyclictest	3193097	-21	kworker/u8:0+events_unbound	12:35:20	0
3084013	99	50	43,5	cyclictest	3083804	-21	kworker/u8:2+events_unbound	07:19:28	3
3084013	99	49	36,10	cyclictest	39	1	ktimers/3	08:55:12	3
3084009	99	48	37,7	cyclictest	3122256	-21	grep	08:55:30	2
3084009	99	45	34,6	cyclictest	0	-21	swapper/2	08:39:36	2
3084004	99	45	38,4	cyclictest	3182810	-21	idleruntime-cro	11:55:00	1
3084009	99	43	28,11	cyclictest	31	1	ktimers/2	11:05:13	2
3084004	99	43	35,4	cyclictest	0	-21	swapper/1	07:15:00	1
3084004	99	43	35,4	cyclictest	0	-21	swapper/1	07:15:00	1
3084004	99	43	32,8	cyclictest	23	1	ktimers/1	10:30:12	1
3084000	99	43	37,4	cyclictest	3146510	-21	kworker/u8:2+events_unbound	10:40:05	0
3084000	99	42	31,8	cyclictest	12	1	ktimers/0	07:55:16	0
3084000	99	42	31,8	cyclictest	12	1	ktimers/0	07:55:15	0
3084013	99	40	34,4	cyclictest	3152095	-21	kworker/u8:3+events_unbound	10:25:02	3
3084013	99	40	28,7	cyclictest	0	-21	swapper/3	08:45:01	3
3084004	99	40	33,5	cyclictest	3101424	-21	kworker/u8:1+events_unbound	08:19:34	1
3084013	99	39	31,4	cyclictest	0	-21	swapper/3	07:20:15	3
3084013	99	39	16,11	cyclictest	0	-21	swapper/3	12:18:46	3
3084000	99	39	27,9	cyclictest	3191750	-21	cron	12:20:01	0
3084013	99	38	31,4	cyclictest	3164036	-21	munin-run	11:00:00	3
3084013	99	38	19,5	cyclictest	3134293	-21	kworker/u8:1-events_unbound	09:36:58	3
3084009	99	38	28,6	cyclictest	0	-21	swapper/2	08:00:00	2
3084009	99	38	28,6	cyclictest	0	-21	swapper/2	08:00:00	2
3084009	99	38	27,7	cyclictest	0	-21	swapper/2	08:45:27	2
3084000	99	38	29,6	cyclictest	3153821	-21	munin-plugin-st	10:30:00	0
3084013	99	37	31,4	cyclictest	3186311	-21	kworker/u8:1+events_unbound	12:20:18	3
3084013	99	37	31,4	cyclictest	3144803	-21	kworker/u8:0+events_unbound	10:04:57	3
3084013	99	37	31,4	cyclictest	3101424	-21	kworker/u8:1+events_unbound	08:14:33	3
3084013	99	37	30,5	cyclictest	3120614	-21	kworker/u8:2+events_unbound	08:54:40	3
3084013	99	37	30,5	cyclictest	3118738	-21	kworker/u8:1+events_unbound	08:49:38	3
3084013	99	37	29,5	cyclictest	3177700	-21	sendmail	11:40:00	3
3084013	99	37	25,7	cyclictest	3096057	-21	grep	07:40:27	3
3084009	99	37	27,6	cyclictest	3177682	-21	sh	11:40:01	2
3084004	99	37	30,4	cyclictest	3157210	-21	auditctl	10:40:00	1
3084004	99	37	29,4	cyclictest	0	-21	swapper/1	09:25:28	1
3084004	99	37	29,4	cyclictest	0	-21	swapper/1	09:25:28	1
3084004	99	37	2,4	cyclictest	13	1	rcu_preempt	11:30:13	1
3084000	99	37	28,4	cyclictest	0	-21	swapper/0	11:55:01	0
3084013	99	36	30,4	cyclictest	3160851	-21	kworker/u8:2+events_unbound	11:20:10	3
3084013	99	36	30,4	cyclictest	3125983	-21	kworker/u8:1+events_unbound	09:14:41	3
3084013	99	36	22,5	cyclictest	13	1	rcu_preempt	11:55:15	3
3084013	99	36	20,3	cyclictest	13	1	rcu_preempt	12:00:34	3
3084004	99	36	30,4	cyclictest	3125983	-21	kworker/u8:1+events_unbound	09:19:43	1
3084000	99	36	5,5	cyclictest	13	1	rcu_preempt	07:15:14	0
3084000	99	36	30,4	cyclictest	3193097	-21	kworker/u8:0+events_unbound	12:30:18	0
3084000	99	36	30,4	cyclictest	3150163	-21	kworker/u8:1+events_unbound	10:20:00	0
3084013	99	35	7,20	cyclictest	40	-21	ksoftirqd/3	09:45:01	3
3084013	99	35	29,4	cyclictest	3089270	-21	kworker/u8:0+events_unbound	07:34:30	3
3084013	99	35	27,4	cyclictest	0	-21	swapper/3	12:40:00	3
3084013	99	35	27,4	cyclictest	0	-21	swapper/3	09:55:25	3
3084013	99	35	25,6	cyclictest	0	-21	swapper/3	09:15:26	3
3084013	99	35	24,8	cyclictest	3182798	-21	idleruntime-cro	11:55:00	3
3084013	99	35	24,7	cyclictest	3167071	-21	grep	11:05:40	3
3084013	99	35	20,4	cyclictest	13	1	rcu_preempt	07:27:09	3
3084004	99	35	27,6	cyclictest	3177481	-21	kworker/u8:2+events_unbound	11:40:14	1
3084004	99	35	27,4	cyclictest	3191748	-21	kthreadd	12:20:00	1
3084004	99	35	25,7	cyclictest	3160631	-21	auditctl	10:50:00	1
3084000	99	35	27,4	cyclictest	0	-21	swapper/0	10:25:00	0
3084013	99	34	28,4	cyclictest	3105097	-21	kworker/u8:2+events_unbound	08:09:33	3
3084013	99	34	28,4	cyclictest	3089270	-21	kworker/u8:0+events_unbound	07:53:43	3
3084013	99	34	27,5	cyclictest	3083804	-21	kworker/u8:2+events_unbound	07:13:43	3
3084013	99	34	27,5	cyclictest	3083804	-21	kworker/u8:2+events_unbound	07:13:43	3
3084013	99	34	26,6	cyclictest	3188162	-21	kworker/u8:0+events_unbound	12:13:42	3
3084013	99	34	26,4	cyclictest	0	-21	swapper/3	12:30:18	3
3084013	99	34	25,5	cyclictest	0	-21	swapper/3	09:54:53	3
3084013	99	34	20,4	cyclictest	13	1	rcu_preempt	09:22:55	3
3084009	99	34	27,4	cyclictest	0	-21	swapper/2	12:05:16	2
3084009	99	34	26,4	cyclictest	0	-21	swapper/2	10:40:00	2
3084009	99	34	26,4	cyclictest	0	-21	swapper/2	09:45:29	2
3084009	99	34	26,4	cyclictest	0	-21	swapper/2	07:40:28	2
3084009	99	34	24,7	cyclictest	3153355	-21	unixbench_multi	10:25:26	2
3084009	99	34	23,7	cyclictest	3170428	-21	grep	11:15:26	2
3084004	99	34	28,4	cyclictest	3101424	-21	kworker/u8:1+events_unbound	08:04:33	1
3084004	99	34	27,4	cyclictest	3126109	-21	idleruntime-cro	09:10:00	1
3084004	99	34	27,4	cyclictest	3105212	-21	latency_hist	08:10:00	1
3084004	99	34	26,4	cyclictest	0	-21	swapper/1	11:55:25	1
3084004	99	34	13,4	cyclictest	13	1	rcu_preempt	10:40:12	1
3084000	99	34	24,6	cyclictest	0	-21	swapper/0	11:35:00	0
3084013	99	33	26,5	cyclictest	3174213	-21	kworker/u8:3+events_unbound	11:43:42	3
3084013	99	33	24,7	cyclictest	39	1	ktimers/3	08:30:13	3
3084013	99	33	19,7	cyclictest	3146510	-21	kworker/u8:2+events_unbound	10:16:53	3
3084013	99	33	15,11	cyclictest	13	1	rcu_preempt	09:45:13	3
3084013	99	33	13,3	cyclictest	13	1	rcu_preempt	12:28:04	3
3084013	99	33	13,3	cyclictest	13	1	rcu_preempt	12:28:04	3
3084009	99	33	26,4	cyclictest	3182799	-21	cron	11:55:00	2
3084009	99	33	23,7	cyclictest	0	-21	swapper/2	09:55:25	2
3084004	99	33	25,4	cyclictest	0	-21	swapper/1	09:10:15	1
3084004	99	33	25,4	cyclictest	0	-21	swapper/1	08:10:27	1
3084004	99	33	24,6	cyclictest	3162572	-21	kworker/u8:0+events_unbound	10:55:27	1
3084004	99	33	22,7	cyclictest	3137805	-21	grep	09:40:25	1
3084004	99	33	1,5	cyclictest	13	1	rcu_preempt	10:00:11	1
3084000	99	33	23,6	cyclictest	0	-21	swapper/0	11:50:00	0
3084000	99	33	15,11	cyclictest	13	1	rcu_preempt	12:20:32	0
3084013	99	32	23,5	cyclictest	0	-21	swapper/3	08:25:26	3
3084013	99	32	23,5	cyclictest	0	-21	swapper/3	08:25:25	3
3084013	99	32	19,5	cyclictest	13	1	rcu_preempt	08:18:06	3
3084013	99	32	19,4	cyclictest	13	1	rcu_preempt	11:10:21	3
3084013	99	32	13,4	cyclictest	13	1	rcu_preempt	09:05:12	3
3084013	99	32	13,3	cyclictest	13	1	rcu_preempt	08:22:38	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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