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 Mon Mar 16, 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
3124645	99	54	48,4	cyclictest	3160813	-21	kworker/u8:3+events_unbound	21:16:04	0
3124645	99	54	18,8	cyclictest	13	1	rcu_preempt	22:15:11	0
3124654	99	51	42,5	cyclictest	3232545	-21	apt-config	00:20:00	2
3124654	99	51	42,5	cyclictest	3232545	-21	apt-config	00:20:00	2
3124645	99	49	38,7	cyclictest	3197192	-21	grep	22:35:23	0
3124650	99	47	41,4	cyclictest	3209446	-21	kworker/u8:3+events_unbound	23:26:31	1
3124659	99	46	37,5	cyclictest	3236052	-21	cut	00:30:00	3
3124654	99	46	38,5	cyclictest	3135409	-21	munin-plugin-st	19:40:01	2
3124654	99	45	32,9	cyclictest	3207483	-21	grep	23:05:26	2
3124650	99	45	35,6	cyclictest	3168398	-21	fschecks_count	21:15:15	1
3124645	99	44	37,5	cyclictest	3230675	-21	kworker/u8:2+events_unbound	00:23:42	0
3124645	99	44	36,6	cyclictest	3143942	-21	kworker/u8:1+events_unbound	21:00:59	0
3124645	99	44	36,5	cyclictest	3211525	-21	sendmail	23:20:00	0
3124645	99	44	36,5	cyclictest	3211525	-21	sendmail	23:20:00	0
3124645	99	44	29,11	cyclictest	12	1	ktimers/0	23:10:12	0
3124654	99	42	21,8	cyclictest	13	1	rcu_preempt	19:45:01	2
3124659	99	41	33,4	cyclictest	0	-21	swapper/3	20:35:01	3
3124650	99	40	30,6	cyclictest	0	-21	swapper/1	22:45:00	1
3124645	99	40	34,4	cyclictest	3171260	-21	kworker/u8:3+events_unbound	21:36:14	0
3124645	99	40	31,6	cyclictest	3133241	-21	unixbench_multi	19:30:25	0
3124645	99	40	29,5	cyclictest	3160813	-21	kworker/u8:3+events_unbound	20:55:59	0
3124645	99	40	19,11	cyclictest	13	1	rcu_preempt	23:55:23	0
3124645	99	40	14,13	cyclictest	13	1	rcu_preempt	23:20:05	0
3124645	99	39	33,4	cyclictest	3200743	-21	kworker/u8:0+events_unbound	23:41:35	0
3124645	99	39	29,4	cyclictest	3179665	-21	kworker/u8:0+events_unbound	22:26:23	0
3124654	99	38	27,8	cyclictest	3174854	-21	auditctl	21:35:00	2
3124650	99	38	27,6	cyclictest	0	-21	swapper/1	23:20:00	1
3124650	99	38	27,6	cyclictest	0	-21	swapper/1	23:19:59	1
3124645	99	38	32,4	cyclictest	3225299	-21	kworker/u8:3+events_unbound	00:12:42	0
3124645	99	38	32,4	cyclictest	3225299	-21	kworker/u8:3+events_unbound	00:12:42	0
3124645	99	38	28,6	cyclictest	0	-21	swapper/0	00:40:00	0
3124645	99	38	26,7	cyclictest	0	-21	swapper/0	19:10:26	0
3124645	99	38	22,5	cyclictest	13	1	rcu_preempt	21:30:25	0
3124654	99	37	8,7	cyclictest	32	-21	ksoftirqd/2	23:35:25	2
3124654	99	37	27,7	cyclictest	3138373	-21	grep	19:45:24	2
3124645	99	37	31,4	cyclictest	3133455	-21	kworker/u8:0+events_unbound	19:40:44	0
3124645	99	37	24,4	cyclictest	13	1	rcu_preempt	00:15:17	0
3124645	99	37	24,4	cyclictest	13	1	rcu_preempt	00:15:17	0
3124645	99	37	12,12	cyclictest	0	-21	swapper/0	22:34:52	0
3124654	99	36	26,6	cyclictest	0	-21	swapper/2	20:00:27	2
3124654	99	36	20,6	cyclictest	13	1	rcu_preempt	21:02:53	2
3124650	99	36	29,3	cyclictest	0	-21	swapper/1	00:20:00	1
3124650	99	36	29,3	cyclictest	0	-21	swapper/1	00:20:00	1
3124650	99	36	26,6	cyclictest	0	-21	swapper/1	22:35:23	1
3124650	99	36	26,6	cyclictest	0	-21	swapper/1	20:55:24	1
3124650	99	36	23,8	cyclictest	0	-21	swapper/1	19:15:01	1
3124645	99	36	30,4	cyclictest	3213208	-21	kworker/u8:1+events_unbound	23:31:34	0
3124645	99	36	30,4	cyclictest	3122472	-21	kworker/u8:3+events_unbound	19:25:41	0
3124645	99	36	29,4	cyclictest	3183683	-21	latency_hist	22:00:01	0
3124645	99	36	25,7	cyclictest	0	-21	swapper/0	19:25:01	0
3124654	99	35	27,4	cyclictest	0	-21	swapper/2	22:30:16	2
3124654	99	35	27,4	cyclictest	0	-21	swapper/2	20:40:24	2
3124654	99	35	25,6	cyclictest	3167616	-21	grep	21:10:25	2
3124650	99	35	25,6	cyclictest	0	-21	swapper/1	23:00:25	1
3124645	99	35	7,4	cyclictest	13	1	rcu_preempt	20:29:41	0
3124645	99	35	29,4	cyclictest	3156006	-21	kworker/u8:2+events_unbound	20:44:41	0
3124645	99	35	25,6	cyclictest	0	-21	swapper/0	21:20:24	0
3124645	99	35	23,7	cyclictest	0	-21	swapper/0	22:05:24	0
3124645	99	35	19,4	cyclictest	13	1	rcu_preempt	20:23:44	0
3124645	99	35	15,11	cyclictest	13	1	rcu_preempt	20:50:37	0
3124659	99	34	26,4	cyclictest	0	-21	swapper/3	00:20:25	3
3124659	99	34	25,5	cyclictest	0	-21	swapper/3	23:40:16	3
3124659	99	34	23,6	cyclictest	3138386	-21	head	19:45:25	3
3124654	99	34	26,4	cyclictest	0	-21	swapper/2	22:00:16	2
3124654	99	34	24,6	cyclictest	0	-21	swapper/2	20:10:00	2
3124654	99	34	10,6	cyclictest	30	1	rcuc/2	22:55:25	2
3124650	99	34	20,6	cyclictest	3154282	-21	kworker/u8:0+events_unbound	20:49:10	1
3124650	99	34	18,4	cyclictest	13	1	rcu_preempt	23:42:23	1
3124645	99	34	25,6	cyclictest	0	-21	swapper/0	19:45:25	0
3124645	99	34	19,5	cyclictest	13	1	rcu_preempt	21:45:16	0
3124645	99	34	17,4	cyclictest	13	1	rcu_preempt	23:28:58	0
3124645	99	34	16,5	cyclictest	13	1	rcu_preempt	23:00:18	0
3124645	99	34	15,4	cyclictest	0	-21	swapper/0	19:50:40	0
3124645	99	34	15,10	cyclictest	13	1	rcu_preempt	21:08:04	0
3124645	99	34	14,10	cyclictest	0	-21	swapper/0	23:35:18	0
3124645	99	34	13,5	cyclictest	13	1	rcu_preempt	00:00:26	0
3124645	99	34	12,4	cyclictest	13	1	rcu_preempt	20:00:22	0
3124659	99	33	25,4	cyclictest	0	-21	swapper/3	00:20:00	3
3124659	99	33	25,4	cyclictest	0	-21	swapper/3	00:19:59	3
3124654	99	33	8,6	cyclictest	0	-21	swapper/2	23:10:12	2
3124654	99	33	25,4	cyclictest	0	-21	swapper/2	19:55:01	2
3124654	99	33	24,6	cyclictest	3141988	-21	unixbench_multi	19:55:25	2
3124654	99	33	23,7	cyclictest	3126419	-21	latency_hist	19:15:01	2
3124654	99	33	23,6	cyclictest	0	-21	swapper/2	20:55:23	2
3124654	99	33	22,8	cyclictest	3183389	-21	idleruntime-cro	22:00:00	2
3124654	99	33	15,5	cyclictest	3149512	-21	apt-get	20:20:12	2
3124650	99	33	25,4	cyclictest	0	-21	swapper/1	23:05:26	1
3124650	99	33	25,4	cyclictest	0	-21	swapper/1	20:35:52	1
3124650	99	33	25,4	cyclictest	0	-21	swapper/1	19:25:39	1
3124650	99	33	23,6	cyclictest	0	-21	swapper/1	19:35:26	1
3124650	99	33	23,6	cyclictest	0	-21	swapper/1	00:25:24	1
3124650	99	33	20,9	cyclictest	3154029	-21	sshd	20:30:52	1
3124650	99	33	11,10	cyclictest	24	-21	ksoftirqd/1	19:50:16	1
3124645	99	33	27,3	cyclictest	0	-21	swapper/0	23:10:00	0
3124645	99	33	25,6	cyclictest	3195256	-21	kworker/u8:2+events_unbound	22:41:25	0
3124645	99	33	15,9	cyclictest	13	1	rcu_preempt	20:35:17	0
3124645	99	33	13,4	cyclictest	0	-21	swapper/0	20:46:52	0
3124659	99	32	24,4	cyclictest	0	-21	swapper/3	22:46:25	3
3124659	99	32	21,7	cyclictest	3188917	-21	cron	22:15:01	3
3124659	99	32	21,7	cyclictest	3172704	-21	grep	21:25:25	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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