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 Thu Mar 26, 2026 00:46:20)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
925500	2	301	273,20	sleep6	0	-21	swapper/6	19:05:15	6
926816	2	298	284,9	sleep3	0	-21	swapper/3	19:06:33	3
926919	2	293	262,24	sleep2	0	-21	swapper/2	19:08:00	2
926789	2	291	257,26	sleep5	0	-21	swapper/5	19:06:10	5
926833	2	290	273,10	sleep0	0	-21	swapper/0	19:06:46	0
926858	2	288	268,12	sleep7	0	-21	swapper/7	19:07:08	7
926861	2	287	266,13	sleep1	0	-21	swapper/1	19:07:10	1
926757	2	287	267,13	sleep4	0	-21	swapper/4	19:05:45	4
927531	99	34	0,33	cyclictest	0	-21	swapper/1	21:00:31	1
927531	99	34	0,33	cyclictest	0	-21	swapper/1	20:19:53	1
927537	99	33	30,2	cyclictest	943946	-21	cat	19:40:14	7
927537	99	33	0,30	cyclictest	0	-21	swapper/7	23:22:32	7
927536	99	33	30,2	cyclictest	971751	-21	cat	20:35:14	6
927536	99	33	30,2	cyclictest	1040233	-21	cat	22:50:14	6
927536	99	33	0,30	cyclictest	0	-21	swapper/6	19:28:22	6
927533	99	33	30,2	cyclictest	449069	-21	snmpd	23:13:05	3
927533	99	33	30,2	cyclictest	449069	-21	snmpd	00:13:22	3
927533	99	33	0,30	cyclictest	0	-21	swapper/3	22:25:46	3
927533	99	33	0,30	cyclictest	0	-21	swapper/3	21:07:50	3
927533	99	33	0,30	cyclictest	0	-21	swapper/3	20:57:25	3
927532	99	33	0,31	cyclictest	0	-21	swapper/2	22:34:34	2
927531	99	33	30,2	cyclictest	989523	-21	cat	21:10:14	1
927531	99	33	30,2	cyclictest	449069	-21	snmpd	22:47:22	1
927531	99	33	30,2	cyclictest	449069	-21	snmpd	21:58:00	1
927531	99	33	30,2	cyclictest	449069	-21	snmpd	00:13:07	1
927531	99	33	0,31	cyclictest	0	-21	swapper/1	20:35:13	1
927537	99	32	30,2	cyclictest	449069	-21	snmpd	20:57:02	7
927537	99	32	29,2	cyclictest	449069	-21	snmpd	19:25:55	7
927537	99	32	29,2	cyclictest	1072779	-21	cat	23:55:14	7
927537	99	32	0,31	cyclictest	0	-21	swapper/7	20:47:15	7
927536	99	32	30,1	cyclictest	449069	-21	snmpd	20:01:50	6
927536	99	32	29,2	cyclictest	987033	-21	cat	21:05:14	6
927536	99	32	29,2	cyclictest	946408	-21	cat	19:45:13	6
927536	99	32	29,2	cyclictest	449069	-21	snmpd	23:31:39	6
927536	99	32	29,2	cyclictest	449069	-21	snmpd	20:44:31	6
927536	99	32	29,2	cyclictest	449069	-21	snmpd	19:55:14	6
927536	99	32	0,30	cyclictest	0	-21	swapper/6	20:31:36	6
927535	99	32	30,2	cyclictest	449069	-21	snmpd	22:54:13	5
927535	99	32	30,2	cyclictest	449069	-21	snmpd	22:10:57	5
927535	99	32	30,2	cyclictest	449069	-21	snmpd	21:01:10	5
927535	99	32	30,2	cyclictest	449069	-21	snmpd	20:54:12	5
927535	99	32	30,2	cyclictest	449069	-21	snmpd	20:43:39	5
927535	99	32	30,2	cyclictest	449069	-21	snmpd	19:33:28	5
927534	99	32	30,2	cyclictest	516654	-21	ntpd	21:04:43	4
927534	99	32	30,2	cyclictest	449069	-21	snmpd	22:51:50	4
927534	99	32	30,2	cyclictest	449069	-21	snmpd	20:50:57	4
927534	99	32	30,2	cyclictest	1093085	-21	cat	00:35:14	4
927534	99	32	29,2	cyclictest	516654	-21	ntpd	19:34:43	4
927533	99	32	30,2	cyclictest	449069	-21	snmpd	20:20:15	3
927533	99	32	30,1	cyclictest	449069	-21	snmpd	20:10:35	3
927533	99	32	0,31	cyclictest	0	-21	swapper/3	23:16:03	3
927533	99	32	0,30	cyclictest	0	-21	swapper/3	23:07:45	3
927532	99	32	30,2	cyclictest	449069	-21	snmpd	19:22:04	2
927532	99	32	29,2	cyclictest	449069	-21	snmpd	23:35:24	2
927532	99	32	29,2	cyclictest	449069	-21	snmpd	20:53:57	2
927532	99	32	0,31	cyclictest	1091053	-21	ntpq	00:30:25	2
927532	99	32	0,31	cyclictest	0	-21	swapper/2	19:33:31	2
927531	99	32	30,1	cyclictest	449069	-21	snmpd	23:22:38	1
927531	99	32	30,1	cyclictest	449069	-21	snmpd	22:06:33	1
927531	99	32	30,1	cyclictest	449069	-21	snmpd	21:18:58	1
927531	99	32	30,1	cyclictest	449069	-21	snmpd	20:00:50	1
927531	99	32	29,2	cyclictest	449069	-21	snmpd	21:52:20	1
927531	99	32	29,2	cyclictest	1045260	-21	cat	23:00:14	1
927531	99	32	0,31	cyclictest	0	-21	swapper/1	00:01:30	1
927531	99	32	0,30	cyclictest	0	-21	swapper/1	23:47:18	1
927531	99	32	0,30	cyclictest	0	-21	swapper/1	23:37:51	1
927531	99	32	0,30	cyclictest	0	-21	swapper/1	23:32:57	1
927531	99	32	0,30	cyclictest	0	-21	swapper/1	23:25:29	1
927531	99	32	0,30	cyclictest	0	-21	swapper/1	21:48:59	1
927531	99	32	0,30	cyclictest	0	-21	swapper/1	00:35:31	1
927530	99	32	30,2	cyclictest	449069	-21	snmpd	23:44:45	0
927530	99	32	29,2	cyclictest	449069	-21	snmpd	22:26:34	0
927537	99	31	30,1	cyclictest	930044	-21	kworker/7:1+events	19:15:04	7
927537	99	31	29,2	cyclictest	449069	-21	snmpd	23:12:47	7
927537	99	31	29,2	cyclictest	449069	-21	snmpd	20:43:36	7
927537	99	31	29,2	cyclictest	449069	-21	snmpd	00:15:46	7
927537	99	31	29,1	cyclictest	449069	-21	snmpd	00:30:58	7
927537	99	31	0,30	cyclictest	0	-21	swapper/7	22:35:17	7
927537	99	31	0,30	cyclictest	0	-21	swapper/7	21:59:52	7
927537	99	31	0,1	cyclictest	0	-21	swapper/7	20:20:29	7
927536	99	31	30,1	cyclictest	449069	-21	snmpd	22:08:36	6
927536	99	31	30,1	cyclictest	449069	-21	snmpd	00:30:37	6
927536	99	31	30,1	cyclictest	449069	-21	snmpd	00:27:01	6
927536	99	31	29,1	cyclictest	0	-21	swapper/6	23:10:11	6
927536	99	31	28,2	cyclictest	1027447	-21	cat	22:25:13	6
927536	99	31	0,30	cyclictest	0	-21	swapper/6	23:17:54	6
927536	99	31	0,30	cyclictest	0	-21	swapper/6	20:52:49	6
927536	99	31	0,30	cyclictest	0	-21	swapper/6	19:24:43	6
927536	99	31	0,30	cyclictest	0	-21	swapper/6	00:18:52	6
927536	99	31	0,30	cyclictest	0	-21	swapper/6	00:05:33	6
927536	99	31	0,1	cyclictest	0	-21	swapper/6	23:35:36	6
927535	99	31	30,1	cyclictest	449069	-21	snmpd	23:59:09	5
927535	99	31	30,1	cyclictest	449069	-21	snmpd	23:48:00	5
927535	99	31	30,1	cyclictest	449069	-21	snmpd	22:25:34	5
927535	99	31	29,2	cyclictest	449069	-21	snmpd	23:29:59	5
927535	99	31	29,2	cyclictest	449069	-21	snmpd	20:09:11	5
927535	99	31	29,2	cyclictest	449069	-21	snmpd	19:23:01	5
927535	99	31	28,2	cyclictest	449069	-21	snmpd	19:25:08	5
927535	99	31	0,31	cyclictest	0	-21	swapper/5	20:39:57	5
927535	99	31	0,31	cyclictest	0	-21	swapper/5	20:02:24	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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