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 50 highest latencies:

System r0s0s.osadl.org (updated Mon Mar 16, 2026 00:46:22)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1474613	2	309	286,15	sleep7	0	-21	swapper/7	19:05:26	7
1475829	2	299	287,8	sleep6	0	-21	swapper/6	19:07:58	6
1475818	2	293	273,12	sleep4	0	-21	swapper/4	19:07:48	4
1473869	2	293	260,26	sleep0	0	-21	swapper/0	19:05:03	0
1475943	2	287	268,12	sleep5	0	-21	swapper/5	19:09:34	5
1475834	2	287	267,13	sleep1	0	-21	swapper/1	19:08:01	1
1475700	2	287	268,12	sleep2	0	-21	swapper/2	19:06:09	2
1473872	2	286	266,13	sleep3	0	-21	swapper/3	19:05:06	3
1476450	99	41	39,2	cyclictest	1616500	-21	kworker/u16:2+flush-8:0	00:10:00	4
1476450	99	40	38,2	cyclictest	1470836	-21	kworker/u16:3+flush-8:0	19:15:05	4
1476450	99	38	36,2	cyclictest	1522903	-21	kworker/u16:0+flush-8:0	20:50:29	4
1476448	99	38	36,2	cyclictest	1630960	-21	kworker/u16:0+flush-8:0	00:30:26	2
1476450	99	35	32,3	cyclictest	1578344	-21	kworker/u16:1+events_unbound	22:40:28	4
1476452	99	33	30,2	cyclictest	449069	-21	snmpd	22:58:00	6
1476452	99	33	30,2	cyclictest	449069	-21	snmpd	22:15:57	6
1476452	99	33	30,2	cyclictest	449069	-21	snmpd	21:47:20	6
1476452	99	33	0,30	cyclictest	0	-21	swapper/6	19:12:27	6
1476452	99	33	0,30	cyclictest	0	-21	swapper/6	00:39:30	6
1476452	99	33	0,30	cyclictest	0	-21	swapper/6	00:24:19	6
1476451	99	33	30,2	cyclictest	449069	-21	snmpd	21:24:43	5
1476451	99	33	29,3	cyclictest	449069	-21	snmpd	23:58:12	5
1476450	99	33	32,1	cyclictest	1543416	-21	kworker/u16:3+flush-8:0	22:00:00	4
1476449	99	33	0,30	cyclictest	0	-21	swapper/3	21:40:11	3
1476447	99	33	30,2	cyclictest	449069	-21	snmpd	20:32:26	1
1476447	99	33	30,2	cyclictest	449069	-21	snmpd	20:10:20	1
1476446	99	33	0,30	cyclictest	0	-21	swapper/0	20:57:18	0
1476453	99	32	30,1	cyclictest	449069	-21	snmpd	21:40:14	7
1476453	99	32	30,1	cyclictest	449069	-21	snmpd	21:02:31	7
1476453	99	32	29,2	cyclictest	449069	-21	snmpd	23:04:09	7
1476453	99	32	29,2	cyclictest	449069	-21	snmpd	20:30:11	7
1476453	99	32	29,2	cyclictest	449069	-21	snmpd	19:49:00	7
1476453	99	32	0,31	cyclictest	0	-21	swapper/7	20:06:32	7
1476452	99	32	30,1	cyclictest	449069	-21	snmpd	23:22:59	6
1476452	99	32	30,1	cyclictest	449069	-21	snmpd	23:07:28	6
1476452	99	32	29,2	cyclictest	449069	-21	snmpd	23:51:42	6
1476452	99	32	29,2	cyclictest	449069	-21	snmpd	00:11:11	6
1476452	99	32	0,30	cyclictest	0	-21	swapper/6	23:48:21	6
1476451	99	32	30,2	cyclictest	449069	-21	snmpd	21:11:01	5
1476451	99	32	30,1	cyclictest	449069	-21	snmpd	22:30:21	5
1476451	99	32	30,1	cyclictest	449069	-21	snmpd	20:59:19	5
1476451	99	32	30,1	cyclictest	449069	-21	snmpd	19:58:23	5
1476451	99	32	29,2	cyclictest	449069	-21	snmpd	21:32:11	5
1476451	99	32	0,31	cyclictest	0	-21	swapper/5	23:05:42	5
1476451	99	32	0,31	cyclictest	0	-21	swapper/5	20:42:54	5
1476451	99	32	0,31	cyclictest	0	-21	swapper/5	20:05:14	5
1476451	99	32	0,31	cyclictest	0	-21	swapper/5	19:36:37	5
1476451	99	32	0,31	cyclictest	0	-21	swapper/5	00:15:12	5
1476451	99	32	0,31	cyclictest	0	-21	swapper/5	00:15:11	5
1476450	99	32	30,2	cyclictest	1630960	-21	kworker/u16:0+flush-8:0	00:20:29	4
1476450	99	32	0,31	cyclictest	0	-21	swapper/4	19:40:22	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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