OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #0

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 r0s0s.osadl.org (updated Wed Apr 15, 2026 00:46:24)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3884407	2	304	287,10	sleep0	0	-21	swapper/0	19:09:41	0
3884152	2	304	288,10	sleep2	0	-21	swapper/2	19:06:13	2
3884242	2	299	260,12	sleep6	0	-21	swapper/6	19:07:22	6
3884316	2	296	262,26	sleep1	0	-21	swapper/1	19:08:21	1
3884190	2	292	273,12	sleep3	0	-21	swapper/3	19:06:47	3
3884128	2	290	257,25	sleep7	0	-21	swapper/7	19:05:54	7
3884337	2	289	270,12	sleep4	0	-21	swapper/4	19:08:41	4
3884291	2	287	266,13	sleep5	0	-21	swapper/5	19:08:01	5
3884905	99	38	36,2	cyclictest	3944555	-21	ntp_states	21:05:26	3
3884904	99	38	29,8	cyclictest	449069	-21	snmpd	23:16:05	2
3884905	99	36	35,1	cyclictest	3909229	-21	ntpq	19:55:24	3
3884908	99	35	30,5	cyclictest	449069	-21	snmpd	21:28:26	6
3884905	99	35	32,1	cyclictest	0	-21	swapper/3	00:28:40	3
3884905	99	35	32,1	cyclictest	0	-21	swapper/3	00:28:40	3
3884908	99	34	0,33	cyclictest	0	-21	swapper/6	21:40:08	6
3884907	99	34	0,33	cyclictest	0	-21	swapper/5	22:25:13	5
3884905	99	34	5,29	cyclictest	4003376	-21	sshd	23:04:38	3
3884905	99	34	4,30	cyclictest	3891806	-21	ntpq	19:20:26	3
3884905	99	34	32,2	cyclictest	3963216	-21	kworker/u16:3+events_unbound	21:50:58	3
3884905	99	34	32,2	cyclictest	3879474	-21	kworker/3:1-events	22:09:46	3
3884905	99	34	31,1	cyclictest	0	-21	swapper/3	22:45:10	3
3884905	99	34	2,1	cyclictest	17	1	rcu_preempt	21:35:26	3
3884905	99	34	1,30	cyclictest	45	-21	ksoftirqd/3	00:05:22	3
3884905	99	34	0,1	cyclictest	17	1	rcu_preempt	19:10:22	3
3884904	99	34	29,4	cyclictest	449069	-21	snmpd	00:00:10	2
3884904	99	34	0,33	cyclictest	0	-21	swapper/2	19:28:44	2
3884904	99	34	0,33	cyclictest	0	-21	swapper/2	00:28:26	2
3884904	99	34	0,33	cyclictest	0	-21	swapper/2	00:28:26	2
3884909	99	33	30,2	cyclictest	449069	-21	snmpd	21:45:14	7
3884909	99	33	29,3	cyclictest	0	-21	swapper/7	00:01:34	7
3884908	99	33	30,3	cyclictest	449069	-21	snmpd	20:30:12	6
3884908	99	33	0,30	cyclictest	0	-21	swapper/6	23:17:11	6
3884908	99	33	0,30	cyclictest	0	-21	swapper/6	23:04:20	6
3884907	99	33	30,2	cyclictest	449069	-21	snmpd	23:30:12	5
3884905	99	33	4,29	cyclictest	0	-21	swapper/3	21:55:12	3
3884905	99	33	3,30	cyclictest	4004887	-21	ntpq	23:05:24	3
3884905	99	33	3,30	cyclictest	0	-21	swapper/3	22:20:28	3
3884905	99	33	33,0	cyclictest	0	-21	swapper/3	20:45:14	3
3884905	99	33	33,0	cyclictest	0	-21	swapper/3	20:45:14	3
3884905	99	33	32,1	cyclictest	45	-21	ksoftirqd/3	20:53:02	3
3884905	99	33	31,2	cyclictest	3915050	-21	kworker/u16:2+events_unbound	20:31:10	3
3884905	99	33	31,2	cyclictest	339	-21	systemd-journal	22:10:28	3
3884905	99	33	31,2	cyclictest	16	-21	pr/tty0	22:53:42	3
3884905	99	33	30,2	cyclictest	0	-21	swapper/3	20:19:08	3
3884905	99	33	29,1	cyclictest	0	-21	swapper/3	20:28:04	3
3884905	99	33	0,30	cyclictest	17	1	rcu_preempt	23:40:36	3
3884904	99	33	30,2	cyclictest	449069	-21	snmpd	22:55:05	2
3884904	99	33	29,3	cyclictest	449069	-21	snmpd	20:49:16	2
3884904	99	33	29,3	cyclictest	449069	-21	snmpd	20:49:16	2
3884903	99	33	30,2	cyclictest	449069	-21	snmpd	19:55:14	1
3884909	99	32	30,2	cyclictest	449069	-21	snmpd	21:31:44	7
3884909	99	32	30,2	cyclictest	449069	-21	snmpd	20:02:41	7
3884908	99	32	30,2	cyclictest	449069	-21	snmpd	22:28:28	6
3884908	99	32	29,2	cyclictest	449069	-21	snmpd	20:08:12	6
3884907	99	32	30,2	cyclictest	516654	-21	ntpd	19:14:44	5
3884907	99	32	30,2	cyclictest	449069	-21	snmpd	19:53:41	5
3884907	99	32	29,2	cyclictest	449069	-21	snmpd	22:55:17	5
3884907	99	32	0,31	cyclictest	0	-21	swapper/5	23:21:11	5
3884907	99	32	0,31	cyclictest	0	-21	swapper/5	20:05:32	5
3884906	99	32	30,2	cyclictest	449069	-21	snmpd	21:14:16	4
3884906	99	32	30,2	cyclictest	449069	-21	snmpd	19:27:14	4
3884906	99	32	30,2	cyclictest	449069	-21	snmpd	19:16:25	4
3884905	99	32	3,29	cyclictest	0	-21	swapper/3	20:20:12	3
3884905	99	32	31,1	cyclictest	0	-21	swapper/3	23:16:34	3
3884905	99	32	31,1	cyclictest	0	-21	swapper/3	22:00:12	3
3884905	99	32	31,1	cyclictest	0	-21	swapper/3	19:26:24	3
3884905	99	32	31,1	cyclictest	0	-21	swapper/3	00:38:00	3
3884905	99	32	31,0	cyclictest	0	-21	swapper/3	21:34:04	3
3884905	99	32	30,2	cyclictest	45	-21	ksoftirqd/3	23:34:02	3
3884905	99	32	30,2	cyclictest	45	-21	ksoftirqd/3	00:19:44	3
3884905	99	32	30,2	cyclictest	4038794	-21	kworker/u16:1+flush-8:0	00:12:41	3
3884905	99	32	30,2	cyclictest	3884490	-21	kworker/u16:4+flush-8:0	19:17:47	3
3884905	99	32	30,2	cyclictest	0	-21	swapper/3	19:43:06	3
3884905	99	32	29,2	cyclictest	0	-21	swapper/3	00:02:44	3
3884905	99	32	28,3	cyclictest	3879474	-21	kworker/3:1+events	21:25:10	3
3884905	99	32	2,30	cyclictest	0	-21	swapper/3	22:33:22	3
3884905	99	32	2,30	cyclictest	0	-21	swapper/3	21:48:14	3
3884905	99	32	2,1	cyclictest	45	-21	ksoftirqd/3	23:25:23	3
3884905	99	32	0,32	cyclictest	0	-21	swapper/3	22:40:40	3
3884905	99	32	0,1	cyclictest	17	1	rcu_preempt	21:20:02	3
3884904	99	32	30,1	cyclictest	449069	-21	snmpd	23:52:28	2
3884904	99	32	30,1	cyclictest	449069	-21	snmpd	22:50:46	2
3884904	99	32	30,1	cyclictest	449069	-21	snmpd	22:46:16	2
3884904	99	32	30,1	cyclictest	449069	-21	snmpd	22:19:24	2
3884904	99	32	30,1	cyclictest	449069	-21	snmpd	22:09:39	2
3884904	99	32	30,1	cyclictest	449069	-21	snmpd	20:07:33	2
3884904	99	32	29,2	cyclictest	449069	-21	snmpd	21:55:27	2
3884904	99	32	29,2	cyclictest	449069	-21	snmpd	20:50:55	2
3884904	99	32	29,2	cyclictest	449069	-21	snmpd	20:41:42	2
3884904	99	32	29,2	cyclictest	449069	-21	snmpd	20:41:42	2
3884904	99	32	29,2	cyclictest	449069	-21	snmpd	20:17:03	2
3884904	99	32	29,2	cyclictest	3901318	-21	cat	19:40:16	2
3884904	99	32	0,31	cyclictest	0	-21	swapper/2	21:49:12	2
3884904	99	32	0,31	cyclictest	0	-21	swapper/2	19:46:08	2
3884904	99	32	0,31	cyclictest	0	-21	swapper/2	19:21:37	2
3884904	99	32	0,31	cyclictest	0	-21	swapper/2	00:14:22	2
3884903	99	32	30,2	cyclictest	449069	-21	snmpd	23:11:23	1
3884903	99	32	29,2	cyclictest	449069	-21	snmpd	21:26:56	1
3884903	99	32	0,31	cyclictest	4013147	-21	grep	23:20:29	1
3884902	99	32	30,2	cyclictest	449069	-21	snmpd	20:36:42	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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