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 Fri Mar 27, 2026 00:46:19)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1684998	2	308	288,12	sleep2	0	-21	swapper/2	19:05:13	2
1686785	2	307	280,20	sleep1	0	-21	swapper/1	19:05:43	1
1686923	2	303	282,13	sleep4	0	-21	swapper/4	19:07:39	4
1686800	2	300	261,13	sleep7	0	-21	swapper/7	19:05:57	7
1686969	2	298	261,29	sleep0	0	-21	swapper/0	19:08:15	0
1684993	2	295	262,26	sleep6	0	-21	swapper/6	19:05:08	6
1684992	2	291	256,28	sleep5	0	-21	swapper/5	19:05:08	5
1686961	2	287	267,13	sleep3	0	-21	swapper/3	19:08:10	3
1687785	99	35	30,5	cyclictest	449069	-21	snmpd	00:08:53	4
1687794	99	33	0,30	cyclictest	0	-21	swapper/7	22:18:46	7
1687788	99	33	30,2	cyclictest	449069	-21	snmpd	21:14:47	5
1687788	99	33	30,2	cyclictest	1822484	-21	cat	23:55:17	5
1687788	99	33	0,31	cyclictest	0	-21	swapper/5	22:12:16	5
1687785	99	33	0,30	cyclictest	0	-21	swapper/4	23:02:23	4
1687783	99	33	0,30	cyclictest	0	-21	swapper/3	19:13:26	3
1687779	99	33	30,2	cyclictest	449069	-21	snmpd	22:11:25	2
1687777	99	33	31,2	cyclictest	1718944	-21	kworker/u16:3+events_unbound	20:40:25	1
1687774	99	33	30,2	cyclictest	449069	-21	snmpd	22:15:04	0
1687774	99	33	30,2	cyclictest	449069	-21	snmpd	19:48:51	0
1687794	99	32	30,2	cyclictest	449069	-21	snmpd	19:39:15	7
1687794	99	32	30,2	cyclictest	449069	-21	snmpd	19:13:22	7
1687794	99	32	30,2	cyclictest	1514821	-21	kworker/7:0+events	20:10:12	7
1687794	99	32	30,1	cyclictest	449069	-21	snmpd	21:56:54	7
1687794	99	32	0,31	cyclictest	0	-21	swapper/7	20:07:15	7
1687790	99	32	30,2	cyclictest	449069	-21	snmpd	23:49:43	6
1687788	99	32	30,2	cyclictest	449069	-21	snmpd	19:12:49	5
1687788	99	32	30,2	cyclictest	449069	-21	snmpd	00:34:51	5
1687788	99	32	29,2	cyclictest	1784468	-21	cat	22:40:15	5
1687785	99	32	30,2	cyclictest	449069	-21	snmpd	22:58:59	4
1687785	99	32	30,2	cyclictest	449069	-21	snmpd	22:49:29	4
1687785	99	32	30,2	cyclictest	449069	-21	snmpd	21:10:23	4
1687785	99	32	0,31	cyclictest	0	-21	swapper/4	22:00:57	4
1687785	99	32	0,31	cyclictest	0	-21	swapper/4	00:16:23	4
1687783	99	32	30,1	cyclictest	449069	-21	snmpd	23:11:24	3
1687783	99	32	29,2	cyclictest	449069	-21	snmpd	21:53:45	3
1687783	99	32	29,2	cyclictest	449069	-21	snmpd	21:27:41	3
1687783	99	32	29,2	cyclictest	449069	-21	snmpd	00:35:06	3
1687783	99	32	29,2	cyclictest	449069	-21	snmpd	00:19:59	3
1687783	99	32	29,2	cyclictest	449069	-21	snmpd	00:05:47	3
1687783	99	32	0,30	cyclictest	0	-21	swapper/3	20:11:03	3
1687779	99	32	30,1	cyclictest	871	-21	runrttasks	23:03:42	2
1687779	99	32	29,2	cyclictest	516654	-21	ntpd	20:09:43	2
1687779	99	32	29,2	cyclictest	449069	-21	snmpd	20:44:26	2
1687779	99	32	0,31	cyclictest	0	-21	swapper/2	23:26:06	2
1687777	99	32	30,2	cyclictest	449069	-21	snmpd	22:16:02	1
1687777	99	32	30,2	cyclictest	449069	-21	snmpd	21:36:05	1
1687777	99	32	30,2	cyclictest	1759635	-21	cat	21:30:14	1
1687774	99	32	29,2	cyclictest	449069	-21	snmpd	23:51:07	0
1687774	99	32	0,31	cyclictest	0	-21	swapper/0	23:35:58	0
1687774	99	32	0,31	cyclictest	0	-21	swapper/0	22:09:55	0
1687774	99	32	0,31	cyclictest	0	-21	swapper/0	19:22:16	0
1687794	99	31	30,1	cyclictest	449069	-21	snmpd	23:04:15	7
1687794	99	31	30,1	cyclictest	449069	-21	snmpd	21:54:24	7
1687794	99	31	30,1	cyclictest	449069	-21	snmpd	00:00:29	7
1687794	99	31	29,2	cyclictest	449069	-21	snmpd	21:24:15	7
1687794	99	31	29,2	cyclictest	449069	-21	snmpd	19:31:08	7
1687794	99	31	0,30	cyclictest	0	-21	swapper/7	20:55:22	7
1687794	99	31	0,30	cyclictest	0	-21	swapper/7	19:44:11	7
1687794	99	31	0,30	cyclictest	0	-21	swapper/7	00:19:41	7
1687794	99	31	0,30	cyclictest	0	-21	swapper/7	00:08:05	7
1687794	99	31	0,1	cyclictest	0	-21	swapper/7	22:37:11	7
1687790	99	31	30,1	cyclictest	449069	-21	snmpd	23:42:55	6
1687790	99	31	30,1	cyclictest	449069	-21	snmpd	23:32:19	6
1687790	99	31	30,1	cyclictest	449069	-21	snmpd	23:17:54	6
1687790	99	31	30,1	cyclictest	449069	-21	snmpd	22:28:01	6
1687790	99	31	30,1	cyclictest	449069	-21	snmpd	22:05:33	6
1687790	99	31	30,1	cyclictest	449069	-21	snmpd	19:46:50	6
1687790	99	31	29,2	cyclictest	449069	-21	snmpd	23:04:12	6
1687790	99	31	29,2	cyclictest	449069	-21	snmpd	00:15:23	6
1687790	99	31	29,2	cyclictest	1747129	-21	cat	21:05:14	6
1687790	99	31	0,30	cyclictest	0	-21	swapper/6	19:21:49	6
1687790	99	31	0,1	cyclictest	0	-21	swapper/6	23:09:39	6
1687790	99	31	0,1	cyclictest	0	-21	swapper/6	21:28:26	6
1687790	99	31	0,1	cyclictest	0	-21	swapper/6	20:14:39	6
1687790	99	31	0,1	cyclictest	0	-21	swapper/6	20:01:42	6
1687788	99	31	28,2	cyclictest	449069	-21	snmpd	23:43:40	5
1687788	99	31	0,31	cyclictest	0	-21	swapper/5	19:36:23	5
1687788	99	31	0,30	cyclictest	0	-21	swapper/5	23:26:36	5
1687788	99	31	0,30	cyclictest	0	-21	swapper/5	20:19:24	5
1687788	99	31	0,30	cyclictest	0	-21	swapper/5	00:25:44	5
1687788	99	31	0,1	cyclictest	0	-21	swapper/5	20:53:19	5
1687785	99	31	29,2	cyclictest	449069	-21	snmpd	21:49:48	4
1687785	99	31	0,31	cyclictest	0	-21	swapper/4	20:17:39	4
1687785	99	31	0,30	cyclictest	0	-21	swapper/4	23:50:28	4
1687785	99	31	0,30	cyclictest	0	-21	swapper/4	21:23:21	4
1687785	99	31	0,30	cyclictest	0	-21	swapper/4	00:01:29	4
1687785	99	31	0,1	cyclictest	0	-21	swapper/4	23:46:31	4
1687785	99	31	0,1	cyclictest	0	-21	swapper/4	23:35:22	4
1687785	99	31	0,1	cyclictest	0	-21	swapper/4	23:20:27	4
1687785	99	31	0,1	cyclictest	0	-21	swapper/4	22:34:49	4
1687785	99	31	0,1	cyclictest	0	-21	swapper/4	20:49:22	4
1687785	99	31	0,1	cyclictest	0	-21	swapper/4	19:48:38	4
1687783	99	31	30,1	cyclictest	449069	-21	snmpd	19:42:38	3
1687783	99	31	30,1	cyclictest	449069	-21	snmpd	00:28:51	3
1687783	99	31	29,2	cyclictest	449069	-21	snmpd	19:50:32	3
1687783	99	31	29,1	cyclictest	449069	-21	snmpd	23:15:36	3
1687783	99	31	29,1	cyclictest	449069	-21	snmpd	23:04:21	3
1687783	99	31	27,3	cyclictest	449069	-21	snmpd	20:22:49	3
1687783	99	31	0,30	cyclictest	0	-21	swapper/3	22:37:59	3
1687783	99	31	0,30	cyclictest	0	-21	swapper/3	22:34:28	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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