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 Thu Mar 19, 2026 12:46:25)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
35104	2	307	276,24	sleep6	0	-21	swapper/6	07:08:24	6
34968	2	302	281,14	sleep5	0	-21	swapper/5	07:06:30	5
35109	2	301	275,19	sleep2	0	-21	swapper/2	07:08:28	2
34924	2	295	278,10	sleep7	0	-21	swapper/7	07:05:52	7
35160	2	294	286,5	sleep3	0	-21	swapper/3	07:09:09	3
35074	2	294	284,6	sleep4	0	-21	swapper/4	07:07:59	4
34936	2	290	257,25	sleep1	0	-21	swapper/1	07:06:03	1
34926	2	284	275,6	sleep0	0	-21	swapper/0	07:05:52	0
163729	2	70	0,0	sleep7	0	-21	swapper/7	11:20:25	7
35697	99	51	47,2	cyclictest	138142	-21	kworker/u16:2+events_unbound	10:40:01	4
35697	99	39	38,1	cyclictest	154449	-21	kworker/u16:0+events_unbound	11:05:14	4
35697	99	36	34,1	cyclictest	117570	-21	diskstats	09:50:13	4
35697	99	35	33,2	cyclictest	129390	-21	kworker/u16:1+events_unbound	10:15:26	4
35697	99	35	33,2	cyclictest	114257	-21	kworker/u16:3+flush-8:0	09:55:02	4
35697	99	34	31,1	cyclictest	35755	-21	apt-get	07:10:12	4
35694	99	34	30,3	cyclictest	449069	-21	snmpd	11:28:26	1
35698	99	33	30,2	cyclictest	449069	-21	snmpd	09:59:59	5
35697	99	33	31,2	cyclictest	111701	-21	kworker/u16:1+events_unbound	09:45:24	4
35697	99	33	31,1	cyclictest	0	-21	swapper/4	08:50:28	4
35697	99	33	30,2	cyclictest	902	-21	mta-sts-daemon	09:34:36	4
35697	99	33	28,3	cyclictest	174989	-21	kworker/u16:3+flush-8:0	11:53:50	4
35697	99	33	0,33	cyclictest	0	-21	swapper/4	07:20:24	4
35697	99	33	0,32	cyclictest	0	-21	swapper/4	11:25:50	4
35697	99	33	0,1	cyclictest	17	1	rcu_preempt	08:42:47	4
35696	99	33	30,2	cyclictest	449069	-21	snmpd	11:16:20	3
35696	99	33	30,2	cyclictest	449069	-21	snmpd	09:48:11	3
35696	99	33	0,30	cyclictest	0	-21	swapper/3	08:59:47	3
35696	99	33	0,30	cyclictest	0	-21	swapper/3	08:59:46	3
35696	99	33	0,1	cyclictest	0	-21	swapper/3	08:10:14	3
35695	99	33	30,2	cyclictest	449069	-21	snmpd	10:32:46	2
35695	99	33	30,2	cyclictest	449069	-21	snmpd	09:58:05	2
35695	99	33	30,2	cyclictest	449069	-21	snmpd	07:25:22	2
35695	99	33	30,2	cyclictest	449069	-21	snmpd	07:15:10	2
35695	99	33	0,30	cyclictest	0	-21	swapper/2	12:04:25	2
35694	99	33	30,2	cyclictest	449069	-21	snmpd	09:41:44	1
35700	99	32	30,2	cyclictest	449069	-21	snmpd	08:07:44	7
35700	99	32	30,2	cyclictest	120586	-21	cat	09:55:14	7
35700	99	32	29,2	cyclictest	143106	-21	cat	10:40:13	7
35699	99	32	31,1	cyclictest	174989	-21	kworker/u16:3+events_unbound	12:00:02	6
35698	99	32	29,2	cyclictest	173139	-21	cat	11:40:12	5
35698	99	32	0,31	cyclictest	0	-21	swapper/5	07:31:22	5
35698	99	32	0,30	cyclictest	0	-21	swapper/5	10:10:21	5
35697	99	32	31,1	cyclictest	154449	-21	kworker/u16:0+events_unbound	11:45:27	4
35697	99	32	30,2	cyclictest	449069	-21	snmpd	08:10:14	4
35697	99	32	1,1	cyclictest	112845	-21	gawk	09:40:20	4
35696	99	32	30,2	cyclictest	449069	-21	snmpd	09:34:11	3
35696	99	32	30,2	cyclictest	449069	-21	snmpd	07:10:40	3
35696	99	32	30,1	cyclictest	449069	-21	snmpd	09:26:41	3
35696	99	32	29,2	cyclictest	449069	-21	snmpd	07:36:13	3
35696	99	32	29,2	cyclictest	123094	-21	cat	10:00:15	3
35696	99	32	27,4	cyclictest	449069	-21	snmpd	11:26:11	3
35695	99	32	30,1	cyclictest	449069	-21	snmpd	11:47:51	2
35695	99	32	30,1	cyclictest	449069	-21	snmpd	09:25:26	2
35695	99	32	30,1	cyclictest	449069	-21	snmpd	08:00:15	2
35695	99	32	29,2	cyclictest	449069	-21	snmpd	08:41:18	2
35695	99	32	0,30	cyclictest	0	-21	swapper/2	11:54:06	2
35695	99	32	0,30	cyclictest	0	-21	swapper/2	11:08:56	2
35695	99	32	0,30	cyclictest	0	-21	swapper/2	08:08:14	2
35695	99	32	0,29	cyclictest	0	-21	swapper/2	10:03:48	2
35694	99	32	30,1	cyclictest	449069	-21	snmpd	11:20:02	1
35694	99	32	30,1	cyclictest	0	-21	swapper/1	11:51:51	1
35694	99	32	29,2	cyclictest	449069	-21	snmpd	10:14:09	1
35694	99	32	0,31	cyclictest	0	-21	swapper/1	12:09:52	1
35694	99	32	0,31	cyclictest	0	-21	swapper/1	11:17:20	1
35694	99	32	0,31	cyclictest	0	-21	swapper/1	08:25:14	1
35693	99	32	30,2	cyclictest	449069	-21	snmpd	11:03:44	0
35693	99	32	30,2	cyclictest	449069	-21	snmpd	10:33:18	0
35693	99	32	30,2	cyclictest	449069	-21	snmpd	08:57:38	0
35693	99	32	30,2	cyclictest	449069	-21	snmpd	08:57:37	0
35693	99	32	30,2	cyclictest	449069	-21	snmpd	07:22:40	0
35693	99	32	30,2	cyclictest	175652	-21	cat	11:45:14	0
35693	99	32	0,32	cyclictest	0	-21	swapper/0	08:27:42	0
35700	99	31	30,1	cyclictest	449069	-21	snmpd	11:49:30	7
35700	99	31	29,2	cyclictest	79927	-21	cat	08:35:15	7
35700	99	31	29,1	cyclictest	0	-21	swapper/7	10:58:19	7
35700	99	31	28,2	cyclictest	449069	-21	snmpd	10:31:12	7
35700	99	31	0,30	cyclictest	0	-21	swapper/7	11:15:17	7
35700	99	31	0,30	cyclictest	0	-21	swapper/7	09:44:38	7
35700	99	31	0,30	cyclictest	0	-21	swapper/7	09:27:26	7
35700	99	31	0,30	cyclictest	0	-21	swapper/7	08:42:22	7
35700	99	31	0,30	cyclictest	0	-21	swapper/7	07:29:55	7
35700	99	31	0,1	cyclictest	0	-21	swapper/7	11:05:13	7
35699	99	31	30,1	cyclictest	449069	-21	snmpd	11:57:57	6
35699	99	31	29,2	cyclictest	449069	-21	snmpd	12:09:16	6
35699	99	31	29,2	cyclictest	449069	-21	snmpd	11:00:46	6
35699	99	31	29,2	cyclictest	449069	-21	snmpd	10:57:17	6
35699	99	31	29,2	cyclictest	449069	-21	snmpd	08:15:22	6
35699	99	31	29,2	cyclictest	449069	-21	snmpd	08:09:08	6
35699	99	31	29,2	cyclictest	190914	-21	cat	12:15:14	6
35699	99	31	29,2	cyclictest	135608	-21	cat	10:25:14	6
35699	99	31	0,31	cyclictest	0	-21	swapper/6	09:20:16	6
35699	99	31	0,30	cyclictest	0	-21	swapper/6	11:53:06	6
35699	99	31	0,30	cyclictest	0	-21	swapper/6	11:39:06	6
35699	99	31	0,30	cyclictest	0	-21	swapper/6	11:30:23	6
35699	99	31	0,30	cyclictest	0	-21	swapper/6	11:23:17	6
35699	99	31	0,30	cyclictest	0	-21	swapper/6	10:40:13	6
35699	99	31	0,30	cyclictest	0	-21	swapper/6	10:02:21	6
35699	99	31	0,30	cyclictest	0	-21	swapper/6	09:14:31	6
35699	99	31	0,30	cyclictest	0	-21	swapper/6	07:28:38	6
35699	99	31	0,1	cyclictest	0	-21	swapper/6	11:40:12	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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