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 Mon Mar 23, 2026 12:46:28)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3167446	2	300	281,12	sleep6	0	-21	swapper/6	07:06:25	6
3167413	2	296	283,8	sleep0	0	-21	swapper/0	07:05:55	0
3167465	2	295	258,28	sleep4	0	-21	swapper/4	07:06:39	4
3167477	2	291	257,26	sleep7	0	-21	swapper/7	07:06:50	7
3167511	2	288	268,13	sleep5	0	-21	swapper/5	07:07:21	5
3167481	2	286	266,13	sleep2	0	-21	swapper/2	07:06:53	2
3167414	2	286	266,13	sleep1	0	-21	swapper/1	07:05:56	1
3165609	2	286	266,13	sleep3	0	-21	swapper/3	07:05:10	3
3168184	99	36	33,3	cyclictest	3267440	-21	kworker/u16:3+events_unbound	10:25:22	3
3168183	99	35	29,5	cyclictest	449069	-21	snmpd	12:32:50	2
3168183	99	35	29,5	cyclictest	449069	-21	snmpd	08:05:19	2
3168188	99	34	30,3	cyclictest	449069	-21	snmpd	08:04:04	7
3168184	99	34	32,1	cyclictest	3276556	-21	collect2	10:40:24	3
3168184	99	34	32,1	cyclictest	3217383	-21	apt-get	08:45:12	3
3168184	99	34	31,3	cyclictest	3263719	-21	cat	10:15:22	3
3168184	99	34	31,3	cyclictest	3220858	-21	ntpq	08:50:24	3
3168188	99	33	30,2	cyclictest	449069	-21	snmpd	12:38:17	7
3168188	99	33	30,2	cyclictest	449069	-21	snmpd	10:57:20	7
3168188	99	33	30,2	cyclictest	449069	-21	snmpd	09:46:24	7
3168188	99	33	30,2	cyclictest	449069	-21	snmpd	09:18:06	7
3168188	99	33	30,2	cyclictest	449069	-21	snmpd	07:15:02	7
3168187	99	33	30,2	cyclictest	449069	-21	snmpd	10:31:14	6
3168187	99	33	0,30	cyclictest	0	-21	swapper/6	11:46:49	6
3168184	99	33	31,2	cyclictest	3307185	-21	ntpq	11:40:26	3
3168184	99	33	30,3	cyclictest	3314907	-21	ntpq	11:55:24	3
3168184	99	33	30,3	cyclictest	3314907	-21	ntpq	11:55:24	3
3168184	99	33	29,3	cyclictest	3254174	-21	kworker/u16:3+events_unbound	10:12:48	3
3168183	99	33	30,2	cyclictest	449069	-21	snmpd	12:39:41	2
3168183	99	33	30,2	cyclictest	449069	-21	snmpd	09:04:47	2
3168183	99	33	29,4	cyclictest	449069	-21	snmpd	11:08:48	2
3168183	99	33	29,4	cyclictest	449069	-21	snmpd	07:47:18	2
3168183	99	33	0,1	cyclictest	0	-21	swapper/2	10:25:46	2
3168182	99	33	30,2	cyclictest	449069	-21	snmpd	09:36:03	1
3168182	99	33	30,2	cyclictest	3256057	-21	cat	10:00:15	1
3168182	99	33	30,2	cyclictest	3256057	-21	cat	10:00:15	1
3168182	99	33	30,2	cyclictest	3251057	-21	cat	09:50:15	1
3168181	99	33	30,2	cyclictest	449069	-21	snmpd	12:00:07	0
3168181	99	33	0,30	cyclictest	0	-21	swapper/0	07:25:03	0
3168188	99	32	30,1	cyclictest	449069	-21	snmpd	12:33:47	7
3168188	99	32	30,1	cyclictest	449069	-21	snmpd	08:44:56	7
3168188	99	32	30,1	cyclictest	449069	-21	snmpd	08:25:01	7
3168188	99	32	29,2	cyclictest	449069	-21	snmpd	11:03:08	7
3168188	99	32	29,2	cyclictest	449069	-21	snmpd	08:50:29	7
3168188	99	32	28,3	cyclictest	449069	-21	snmpd	07:29:03	7
3168188	99	32	0,31	cyclictest	0	-21	swapper/7	12:25:14	7
3168188	99	32	0,31	cyclictest	0	-21	swapper/7	11:37:57	7
3168188	99	32	0,31	cyclictest	0	-21	swapper/7	11:25:15	7
3168188	99	32	0,31	cyclictest	0	-21	swapper/7	10:20:15	7
3168188	99	32	0,31	cyclictest	0	-21	swapper/7	08:31:45	7
3168188	99	32	0,31	cyclictest	0	-21	swapper/7	07:35:16	7
3168187	99	32	30,2	cyclictest	449069	-21	snmpd	12:30:47	6
3168187	99	32	30,2	cyclictest	3329965	-21	cat	12:25:14	6
3168187	99	32	30,1	cyclictest	449069	-21	snmpd	08:52:53	6
3168187	99	32	29,2	cyclictest	449069	-21	snmpd	11:26:18	6
3168187	99	32	0,31	cyclictest	0	-21	swapper/6	12:20:13	6
3168186	99	32	30,2	cyclictest	449069	-21	snmpd	08:25:43	5
3168186	99	32	30,2	cyclictest	449069	-21	snmpd	07:47:57	5
3168186	99	32	30,2	cyclictest	3263546	-21	cat	10:15:15	5
3168185	99	32	30,2	cyclictest	449069	-21	snmpd	12:26:02	4
3168185	99	32	30,2	cyclictest	449069	-21	snmpd	09:44:18	4
3168185	99	32	30,2	cyclictest	449069	-21	snmpd	07:18:59	4
3168185	99	32	30,2	cyclictest	3311671	-21	cat	11:50:17	4
3168185	99	32	30,2	cyclictest	3311671	-21	cat	11:50:17	4
3168185	99	32	30,1	cyclictest	449069	-21	snmpd	11:00:01	4
3168185	99	32	29,2	cyclictest	449069	-21	snmpd	12:05:18	4
3168185	99	32	29,2	cyclictest	449069	-21	snmpd	10:19:15	4
3168185	99	32	0,31	cyclictest	0	-21	swapper/4	10:36:38	4
3168184	99	32	31,1	cyclictest	3286553	-21	ntp_states	11:00:24	3
3168184	99	32	31,1	cyclictest	3203140	-21	ntpq	08:15:24	3
3168184	99	32	30,2	cyclictest	449069	-21	snmpd	08:02:42	3
3168184	99	32	30,2	cyclictest	3251590	-21	ntp_states	09:50:25	3
3168184	99	32	29,2	cyclictest	3172594	-21	ntpq	07:15:26	3
3168184	99	32	1,31	cyclictest	3244131	-21	ntpq	09:35:26	3
3168184	99	32	0,32	cyclictest	0	-21	swapper/3	08:22:52	3
3168183	99	32	30,1	cyclictest	449069	-21	snmpd	09:06:11	2
3168183	99	32	29,2	cyclictest	3205181	-21	cat	08:20:14	2
3168183	99	32	28,3	cyclictest	449069	-21	snmpd	09:35:03	2
3168183	99	32	0,31	cyclictest	0	-21	swapper/2	08:10:13	2
3168183	99	32	0,31	cyclictest	0	-21	swapper/2	08:10:13	2
3168182	99	32	30,1	cyclictest	449069	-21	snmpd	11:56:49	1
3168182	99	32	30,1	cyclictest	449069	-21	snmpd	11:56:48	1
3168182	99	32	30,1	cyclictest	449069	-21	snmpd	08:40:40	1
3168182	99	32	30,1	cyclictest	449069	-21	snmpd	08:37:34	1
3168182	99	32	30,1	cyclictest	449069	-21	snmpd	08:10:40	1
3168182	99	32	30,1	cyclictest	449069	-21	snmpd	08:10:40	1
3168182	99	32	0,31	cyclictest	0	-21	swapper/1	12:37:08	1
3168182	99	32	0,30	cyclictest	0	-21	swapper/1	10:29:53	1
3168181	99	32	30,1	cyclictest	3222080	-21	kworker/0:2+events	11:50:26	0
3168181	99	32	30,1	cyclictest	3222080	-21	kworker/0:2+events	11:50:25	0
3168181	99	32	29,2	cyclictest	449069	-21	snmpd	10:35:32	0
3168181	99	32	29,2	cyclictest	3220499	-21	cat	08:50:15	0
3168188	99	31	28,2	cyclictest	449069	-21	snmpd	11:13:17	7
3168188	99	31	28,2	cyclictest	449069	-21	snmpd	09:28:51	7
3168188	99	31	0,30	cyclictest	0	-21	swapper/7	10:45:14	7
3168188	99	31	0,30	cyclictest	0	-21	swapper/7	10:43:17	7
3168188	99	31	0,30	cyclictest	0	-21	swapper/7	10:30:04	7
3168188	99	31	0,30	cyclictest	0	-21	swapper/7	09:41:26	7
3168188	99	31	0,30	cyclictest	0	-21	swapper/7	09:31:21	7
3168188	99	31	0,30	cyclictest	0	-21	swapper/7	08:15:55	7
3168188	99	31	0,30	cyclictest	0	-21	swapper/7	08:08:58	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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