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 Nov 28, 2025 00:46:27)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
887387	2	300	272,21	sleep1	0	-21	swapper/1	19:07:19	1
887306	2	297	261,28	sleep7	0	-21	swapper/7	19:06:13	7
887332	2	296	283,8	sleep4	0	-21	swapper/4	19:06:34	4
887502	2	290	257,25	sleep5	0	-21	swapper/5	19:08:51	5
887413	2	287	266,13	sleep2	0	-21	swapper/2	19:07:35	2
887369	2	286	266,13	sleep3	0	-21	swapper/3	19:07:04	3
887514	2	285	266,12	sleep6	0	-21	swapper/6	19:09:00	6
887298	2	285	266,12	sleep0	0	-21	swapper/0	19:06:05	0
888065	99	48	44,3	cyclictest	1708265	-21	systemd-journal	21:20:02	7
888065	99	34	34,0	cyclictest	0	-21	swapper/7	22:07:18	7
888063	99	34	30,3	cyclictest	833	-21	snmpd	23:39:06	5
888059	99	34	31,2	cyclictest	953126	-21	apt-get	21:25:14	1
888059	99	34	31,2	cyclictest	953126	-21	apt-get	21:25:14	1
888065	99	33	33,0	cyclictest	0	-21	swapper/7	23:47:59	7
888064	99	33	30,2	cyclictest	915892	-21	cat	20:05:16	6
888063	99	33	30,3	cyclictest	833	-21	snmpd	21:19:05	5
888061	99	33	30,2	cyclictest	833	-21	snmpd	22:20:46	3
888061	99	33	30,2	cyclictest	833	-21	snmpd	20:33:22	3
888061	99	33	30,2	cyclictest	833	-21	snmpd	20:19:48	3
888059	99	33	30,2	cyclictest	963102	-21	cat	21:45:15	1
888057	99	33	30,2	cyclictest	526955	-21	kworker/0:2+events	20:55:24	0
888057	99	33	0,30	cyclictest	0	-21	swapper/0	23:50:13	0
888065	99	32	30,2	cyclictest	833	-21	snmpd	20:40:46	7
888065	99	32	11,21	cyclictest	0	-21	swapper/7	19:50:21	7
888064	99	32	0,29	cyclictest	0	-21	swapper/6	22:34:07	6
888063	99	32	30,1	cyclictest	833	-21	snmpd	20:58:07	5
888063	99	32	30,1	cyclictest	833	-21	snmpd	20:24:24	5
888063	99	32	29,2	cyclictest	833	-21	snmpd	22:41:56	5
888063	99	32	29,2	cyclictest	833	-21	snmpd	22:22:34	5
888063	99	32	0,31	cyclictest	0	-21	swapper/5	20:37:31	5
888062	99	32	0,31	cyclictest	0	-21	swapper/4	21:06:40	4
888062	99	32	0,30	cyclictest	0	-21	swapper/4	19:51:44	4
888062	99	32	0,30	cyclictest	0	-21	swapper/4	19:35:09	4
888062	99	32	0,30	cyclictest	0	-21	swapper/4	19:35:08	4
888062	99	32	0,29	cyclictest	0	-21	swapper/4	23:01:14	4
888061	99	32	30,2	cyclictest	833	-21	snmpd	23:43:58	3
888061	99	32	30,2	cyclictest	833	-21	snmpd	20:15:00	3
888061	99	32	30,1	cyclictest	833	-21	snmpd	22:56:11	3
888061	99	32	30,1	cyclictest	833	-21	snmpd	22:08:12	3
888061	99	32	30,1	cyclictest	833	-21	snmpd	00:36:02	3
888060	99	32	30,2	cyclictest	833	-21	snmpd	22:58:02	2
888060	99	32	30,2	cyclictest	833	-21	snmpd	22:38:59	2
888060	99	32	30,2	cyclictest	833	-21	snmpd	21:36:44	2
888060	99	32	29,2	cyclictest	915857	-21	cat	20:05:16	2
888060	99	32	29,2	cyclictest	833	-21	snmpd	20:56:55	2
888060	99	32	0,31	cyclictest	0	-21	swapper/2	19:59:41	2
888060	99	32	0,30	cyclictest	0	-21	swapper/2	23:49:37	2
888059	99	32	30,2	cyclictest	833	-21	snmpd	23:44:23	1
888059	99	32	30,2	cyclictest	833	-21	snmpd	22:52:33	1
888059	99	32	30,2	cyclictest	833	-21	snmpd	22:09:57	1
888059	99	32	30,2	cyclictest	833	-21	snmpd	20:06:17	1
888059	99	32	0,31	cyclictest	0	-21	swapper/1	23:19:43	1
888059	99	32	0,31	cyclictest	0	-21	swapper/1	23:19:42	1
888059	99	32	0,31	cyclictest	0	-21	swapper/1	22:03:04	1
888057	99	32	30,1	cyclictest	833	-21	snmpd	22:20:26	0
888065	99	31	30,1	cyclictest	833	-21	snmpd	21:26:42	7
888065	99	31	30,1	cyclictest	833	-21	snmpd	21:26:41	7
888065	99	31	30,1	cyclictest	833	-21	snmpd	21:06:01	7
888065	99	31	29,2	cyclictest	968058	-21	cat	21:55:15	7
888065	99	31	29,2	cyclictest	833	-21	snmpd	21:33:36	7
888065	99	31	29,2	cyclictest	833	-21	snmpd	19:38:03	7
888065	99	31	29,2	cyclictest	833	-21	snmpd	19:38:02	7
888065	99	31	0,30	cyclictest	0	-21	swapper/7	22:30:19	7
888065	99	31	0,30	cyclictest	0	-21	swapper/7	22:26:02	7
888065	99	31	0,30	cyclictest	0	-21	swapper/7	22:24:05	7
888065	99	31	0,30	cyclictest	0	-21	swapper/7	22:11:46	7
888065	99	31	0,30	cyclictest	0	-21	swapper/7	20:33:03	7
888065	99	31	0,30	cyclictest	0	-21	swapper/7	20:05:23	7
888065	99	31	0,1	cyclictest	0	-21	swapper/7	22:56:54	7
888065	99	31	0,1	cyclictest	0	-21	swapper/7	22:17:40	7
888065	99	31	0,1	cyclictest	0	-21	swapper/7	21:51:31	7
888064	99	31	30,1	cyclictest	833	-21	snmpd	23:49:11	6
888064	99	31	30,1	cyclictest	833	-21	snmpd	22:22:46	6
888064	99	31	30,1	cyclictest	833	-21	snmpd	21:15:39	6
888064	99	31	30,1	cyclictest	833	-21	snmpd	00:15:35	6
888064	99	31	30,1	cyclictest	833	-21	snmpd	00:15:00	6
888064	99	31	30,1	cyclictest	833	-21	snmpd	00:04:38	6
888064	99	31	29,2	cyclictest	921661	-21	kworker/u16:0+flush-8:0	20:20:28	6
888064	99	31	29,1	cyclictest	833	-21	snmpd	22:46:02	6
888064	99	31	0,31	cyclictest	0	-21	swapper/6	23:07:14	6
888064	99	31	0,30	cyclictest	0	-21	swapper/6	23:56:19	6
888064	99	31	0,30	cyclictest	0	-21	swapper/6	22:17:31	6
888064	99	31	0,30	cyclictest	0	-21	swapper/6	21:49:07	6
888064	99	31	0,30	cyclictest	0	-21	swapper/6	21:37:00	6
888064	99	31	0,30	cyclictest	0	-21	swapper/6	21:09:23	6
888064	99	31	0,30	cyclictest	0	-21	swapper/6	00:22:53	6
888064	99	31	0,1	cyclictest	0	-21	swapper/6	21:53:13	6
888064	99	31	0,1	cyclictest	0	-21	swapper/6	20:44:26	6
888064	99	31	0,1	cyclictest	0	-21	swapper/6	19:20:10	6
888063	99	31	30,1	cyclictest	833	-21	snmpd	23:51:40	5
888063	99	31	30,1	cyclictest	833	-21	snmpd	23:26:24	5
888063	99	31	30,1	cyclictest	833	-21	snmpd	22:37:10	5
888063	99	31	30,1	cyclictest	833	-21	snmpd	22:12:01	5
888063	99	31	30,1	cyclictest	833	-21	snmpd	21:27:12	5
888063	99	31	30,1	cyclictest	833	-21	snmpd	21:27:11	5
888063	99	31	30,1	cyclictest	833	-21	snmpd	20:15:22	5
888063	99	31	30,1	cyclictest	833	-21	snmpd	19:27:49	5
888063	99	31	30,1	cyclictest	833	-21	snmpd	19:14:23	5
888063	99	31	30,1	cyclictest	833	-21	snmpd	00:20:45	5
888063	99	31	29,2	cyclictest	833	-21	snmpd	23:05:56	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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