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 Tue Mar 10, 2026 00:46:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
951950	2	301	262,14	sleep3	0	-21	swapper/3	19:09:42	3
951779	2	299	279,12	sleep6	0	-21	swapper/6	19:07:19	6
951751	2	287	267,13	sleep7	0	-21	swapper/7	19:06:56	7
951699	2	287	267,13	sleep4	0	-21	swapper/4	19:06:13	4
951908	2	286	267,12	sleep2	0	-21	swapper/2	19:09:08	2
949870	2	286	267,12	sleep0	0	-21	swapper/0	19:05:04	0
951711	2	285	266,12	sleep5	0	-21	swapper/5	19:06:23	5
949871	2	284	265,12	sleep1	0	-21	swapper/1	19:05:05	1
952443	99	39	36,2	cyclictest	1089246	-21	apt-get	23:40:00	0
952443	99	39	36,2	cyclictest	1089246	-21	apt-get	23:40:00	0
952446	99	37	36,1	cyclictest	970130	-21	kworker/u16:1+flush-8:0	19:45:00	3
952445	99	37	37,0	cyclictest	0	-21	swapper/2	20:10:16	2
952443	99	35	29,3	cyclictest	0	-21	swapper/0	00:02:24	0
952446	99	34	30,3	cyclictest	449069	-21	snmpd	23:19:36	3
952445	99	34	34,0	cyclictest	0	-21	swapper/2	22:55:20	2
952449	99	33	30,2	cyclictest	449069	-21	snmpd	22:56:29	6
952449	99	33	30,2	cyclictest	449069	-21	snmpd	19:58:18	6
952449	99	33	30,2	cyclictest	449069	-21	snmpd	19:58:18	6
952448	99	33	0,30	cyclictest	0	-21	swapper/5	22:13:01	5
952447	99	33	0,1	cyclictest	0	-21	swapper/4	21:10:48	4
952446	99	33	30,2	cyclictest	449069	-21	snmpd	21:03:32	3
952444	99	33	30,2	cyclictest	449069	-21	snmpd	23:10:57	1
952444	99	33	30,2	cyclictest	449069	-21	snmpd	22:01:13	1
952444	99	33	30,2	cyclictest	449069	-21	snmpd	20:48:38	1
952444	99	33	0,30	cyclictest	0	-21	swapper/1	23:01:59	1
952443	99	33	30,2	cyclictest	449069	-21	snmpd	22:30:59	0
952450	99	32	30,2	cyclictest	449069	-21	snmpd	19:23:41	7
952450	99	32	30,2	cyclictest	449069	-21	snmpd	19:18:53	7
952449	99	32	30,2	cyclictest	449069	-21	snmpd	22:15:43	6
952449	99	32	30,2	cyclictest	449069	-21	snmpd	20:58:08	6
952449	99	32	30,1	cyclictest	449069	-21	snmpd	23:47:12	6
952449	99	32	30,1	cyclictest	449069	-21	snmpd	19:29:50	6
952449	99	32	0,31	cyclictest	0	-21	swapper/6	23:43:12	6
952449	99	32	0,31	cyclictest	0	-21	swapper/6	23:43:12	6
952449	99	32	0,30	cyclictest	0	-21	swapper/6	20:28:49	6
952449	99	32	0,30	cyclictest	0	-21	swapper/6	00:13:09	6
952448	99	32	30,2	cyclictest	449069	-21	snmpd	23:40:39	5
952448	99	32	30,2	cyclictest	449069	-21	snmpd	23:40:39	5
952448	99	32	30,2	cyclictest	449069	-21	snmpd	23:25:45	5
952448	99	32	30,2	cyclictest	449069	-21	snmpd	21:54:31	5
952448	99	32	30,2	cyclictest	449069	-21	snmpd	21:54:31	5
952448	99	32	30,1	cyclictest	449069	-21	snmpd	19:32:06	5
952448	99	32	29,2	cyclictest	449069	-21	snmpd	22:07:22	5
952448	99	32	29,2	cyclictest	449069	-21	snmpd	19:16:44	5
952448	99	32	29,2	cyclictest	1029996	-21	cat	21:40:15	5
952448	99	32	0,31	cyclictest	0	-21	swapper/5	21:18:33	5
952447	99	32	30,1	cyclictest	449069	-21	snmpd	22:19:16	4
952447	99	32	29,2	cyclictest	971401	-21	cat	19:45:15	4
952447	99	32	29,2	cyclictest	449069	-21	snmpd	19:10:05	4
952447	99	32	29,2	cyclictest	1012447	-21	cat	21:05:15	4
952447	99	32	0,30	cyclictest	0	-21	swapper/4	23:38:09	4
952447	99	32	0,30	cyclictest	0	-21	swapper/4	23:38:09	4
952446	99	32	30,1	cyclictest	986942	-21	diskstats	20:15:16	3
952446	99	32	30,1	cyclictest	449069	-21	snmpd	21:16:54	3
952446	99	32	29,3	cyclictest	449069	-21	snmpd	22:58:20	3
952446	99	32	29,2	cyclictest	449069	-21	snmpd	19:27:41	3
952446	99	32	0,31	cyclictest	1095320	-21	df_inode	23:50:12	3
952445	99	32	32,0	cyclictest	0	-21	swapper/2	21:52:04	2
952445	99	32	32,0	cyclictest	0	-21	swapper/2	21:52:04	2
952445	99	32	32,0	cyclictest	0	-21	swapper/2	19:25:38	2
952445	99	32	30,2	cyclictest	449069	-21	snmpd	23:25:03	2
952445	99	32	30,1	cyclictest	449069	-21	snmpd	23:50:25	2
952445	99	32	0,31	cyclictest	0	-21	swapper/2	00:31:53	2
952444	99	32	30,2	cyclictest	449069	-21	snmpd	00:32:44	1
952444	99	32	30,1	cyclictest	449069	-21	snmpd	21:32:27	1
952444	99	32	29,2	cyclictest	449069	-21	snmpd	21:50:55	1
952444	99	32	29,2	cyclictest	449069	-21	snmpd	21:50:55	1
952444	99	32	29,2	cyclictest	449069	-21	snmpd	19:50:10	1
952444	99	32	29,2	cyclictest	449069	-21	snmpd	19:24:26	1
952444	99	32	0,30	cyclictest	0	-21	swapper/1	22:23:29	1
952444	99	32	0,30	cyclictest	0	-21	swapper/1	20:40:47	1
952444	99	32	0,30	cyclictest	0	-21	swapper/1	20:15:34	1
952444	99	32	0,30	cyclictest	0	-21	swapper/1	00:23:07	1
952444	99	32	0,29	cyclictest	0	-21	swapper/1	00:11:55	1
952443	99	32	30,2	cyclictest	449069	-21	snmpd	21:40:51	0
952443	99	32	30,2	cyclictest	449069	-21	snmpd	19:18:59	0
952443	99	32	30,2	cyclictest	1004926	-21	cat	20:50:15	0
952443	99	32	0,31	cyclictest	0	-21	swapper/0	19:53:45	0
952450	99	31	30,1	cyclictest	449069	-21	snmpd	21:52:31	7
952450	99	31	30,1	cyclictest	449069	-21	snmpd	21:52:31	7
952450	99	31	30,1	cyclictest	449069	-21	snmpd	21:23:21	7
952450	99	31	30,1	cyclictest	0	-21	swapper/7	22:48:23	7
952450	99	31	29,2	cyclictest	449069	-21	snmpd	22:50:44	7
952450	99	31	29,2	cyclictest	449069	-21	snmpd	20:40:29	7
952450	99	31	0,31	cyclictest	0	-21	swapper/7	23:59:31	7
952450	99	31	0,31	cyclictest	0	-21	swapper/7	23:32:21	7
952450	99	31	0,30	cyclictest	0	-21	swapper/7	23:48:28	7
952450	99	31	0,30	cyclictest	0	-21	swapper/7	22:55:08	7
952450	99	31	0,1	cyclictest	0	-21	swapper/7	21:46:27	7
952450	99	31	0,1	cyclictest	0	-21	swapper/7	21:46:27	7
952450	99	31	0,1	cyclictest	0	-21	swapper/7	21:15:33	7
952450	99	31	0,1	cyclictest	0	-21	swapper/7	20:33:55	7
952450	99	31	0,1	cyclictest	0	-21	swapper/7	20:13:49	7
952450	99	31	0,1	cyclictest	0	-21	swapper/7	19:27:11	7
952450	99	31	0,1	cyclictest	0	-21	swapper/7	00:29:41	7
952450	99	31	0,1	cyclictest	0	-21	swapper/7	00:06:46	7
952449	99	31	29,1	cyclictest	449069	-21	snmpd	21:58:25	6
952449	99	31	29,1	cyclictest	449069	-21	snmpd	21:10:42	6
952449	99	31	28,2	cyclictest	449069	-21	snmpd	22:20:55	6
952449	99	31	0,30	cyclictest	0	-21	swapper/6	23:07:33	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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