OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Tue May 12, 2026 00:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
975869	2	77	0,2	sleep3	47	1	rcuc/3	00:36:03	3
648705	99	71	62,6	cyclictest	280	-21	systemd-journal	22:00:00	0
648705	99	65	57,6	cyclictest	665372	-21	kworker/u8:3+flush-8:0	20:26:10	0
648705	99	65	55,7	cyclictest	898777	-21	latency_hist	23:20:00	0
698897	2	64	0,3	chrt	28	1	rcuc/1	19:56:04	1
648711	99	63	59,3	cyclictest	734465	-21	kworker/u8:1+flush-8:0	20:56:07	1
648711	99	62	57,3	cyclictest	655703	-21	kworker/u8:0+events_unbound	19:40:58	1
648705	99	61	52,7	cyclictest	829069	-21	latency_hist	22:10:01	0
648711	99	60	54,4	cyclictest	655703	-21	kworker/u8:0+events_unbound	20:35:56	1
648711	99	60	50,4	cyclictest	665372	-21	kworker/u8:3+events_unbound	20:00:56	1
648711	99	59	54,4	cyclictest	734465	-21	kworker/u8:1+events_unbound	22:01:09	1
648711	99	59	53,5	cyclictest	868609	-21	kworker/u8:3+events_unbound	23:41:05	1
648711	99	57	51,4	cyclictest	665372	-21	kworker/u8:3+events_unbound	20:21:09	1
648711	99	56	51,4	cyclictest	899257	-21	kworker/u8:0+events_unbound	00:15:55	1
648711	99	56	50,5	cyclictest	863670	-21	kworker/u8:1+events_unbound	22:51:05	1
648711	99	56	50,5	cyclictest	675488	-21	kworker/u8:2+events_unbound	19:36:08	1
648711	99	56	50,4	cyclictest	793853	-21	kworker/u8:0+events_unbound	22:06:08	1
648711	99	56	49,5	cyclictest	899257	-21	kworker/u8:0+events_unbound	00:35:56	1
648711	99	56	47,6	cyclictest	280	-21	systemd-journal	23:28:17	1
648705	99	56	46,7	cyclictest	280	-21	systemd-journal	19:50:01	0
648711	99	55	51,3	cyclictest	734465	-21	kworker/u8:1+flush-8:0	21:41:11	1
648711	99	55	50,3	cyclictest	793853	-21	kworker/u8:0+events_unbound	22:41:08	1
648711	99	55	49,5	cyclictest	769689	-21	kworker/u8:0+events_unbound	21:15:56	1
648711	99	55	49,4	cyclictest	655703	-21	kworker/u8:0+flush-8:0	20:31:08	1
648711	99	55	42,10	cyclictest	947687	-21	ntpq	00:06:08	1
648711	99	54	50,3	cyclictest	769689	-21	kworker/u8:0+flush-8:0	21:20:58	1
648711	99	54	49,4	cyclictest	665372	-21	kworker/u8:3+flush-8:0	20:16:13	1
648711	99	54	48,5	cyclictest	734465	-21	kworker/u8:1+events_unbound	22:31:09	1
648711	99	54	47,6	cyclictest	868609	-21	kworker/u8:3+events_unbound	23:16:05	1
648711	99	54	47,6	cyclictest	854076	-21	kworker/u8:2+events_unbound	23:30:57	1
648711	99	54	47,6	cyclictest	854076	-21	kworker/u8:2+events_unbound	23:30:57	1
648711	99	53	48,3	cyclictest	665372	-21	kworker/u8:3+events_unbound	20:26:12	1
648711	99	53	48,3	cyclictest	643659	-21	kworker/u8:3+events_unbound	19:11:10	1
648711	99	53	47,4	cyclictest	655703	-21	kworker/u8:0+events_unbound	19:50:57	1
648711	99	53	45,6	cyclictest	868609	-21	kworker/u8:3+events_unbound	23:11:06	1
648717	99	52	47,3	cyclictest	868609	-21	kworker/u8:3+flush-8:0	23:20:57	2
648711	99	52	47,4	cyclictest	734465	-21	kworker/u8:1+flush-8:0	21:36:12	1
648717	99	51	42,7	cyclictest	280	-21	systemd-journal	20:24:16	2
648711	99	51	47,3	cyclictest	793853	-21	kworker/u8:0+flush-8:0	21:56:10	1
648711	99	51	45,4	cyclictest	938879	-21	kworker/u8:4+events_unbound	00:25:56	1
648711	99	51	45,4	cyclictest	868609	-21	kworker/u8:3+events_unbound	23:00:56	1
648711	99	51	44,5	cyclictest	854076	-21	kworker/u8:2+events_unbound	23:20:56	1
648711	99	50	46,3	cyclictest	734465	-21	kworker/u8:1+flush-8:0	21:31:12	1
648711	99	50	44,5	cyclictest	868609	-21	kworker/u8:3+events_unbound	23:05:57	1
648711	99	50	43,6	cyclictest	863670	-21	kworker/u8:1+events_unbound	22:46:01	1
648717	99	49	43,4	cyclictest	744763	-21	kworker/u8:2+flush-8:0	20:45:58	2
648711	99	49	43,4	cyclictest	591324	-21	kworker/u8:1+events_unbound	19:16:11	1
648711	99	49	43,4	cyclictest	591324	-21	kworker/u8:1+events_unbound	19:16:10	1
648705	99	49	43,4	cyclictest	665372	-21	kworker/u8:3+flush-8:0	20:01:10	0
648711	99	48	43,4	cyclictest	863670	-21	kworker/u8:1+flush-8:0	22:55:58	1
648711	99	48	43,4	cyclictest	734465	-21	kworker/u8:1+flush-8:0	21:26:07	1
648711	99	47	43,3	cyclictest	938879	-21	kworker/u8:4+events_unbound	00:31:07	1
648711	99	47	41,4	cyclictest	839527	-21	apt-get	22:20:51	1
648711	99	47	39,6	cyclictest	280	-21	systemd-journal	20:45:00	1
648711	99	47	38,3	cyclictest	591324	-21	kworker/u8:1+events_unbound	19:31:13	1
648705	99	47	31,13	cyclictest	280	-21	systemd-journal	00:38:18	0
648717	99	46	40,4	cyclictest	675488	-21	kworker/u8:2+flush-8:0	19:51:10	2
648717	99	45	39,4	cyclictest	769689	-21	kworker/u8:0+flush-8:0	21:16:14	2
648711	99	45	41,3	cyclictest	828704	-21	kworker/u8:2+events_unbound	22:11:11	1
648711	99	45	41,3	cyclictest	809208	-21	kworker/u8:3+events_unbound	21:51:00	1
648711	99	45	37,6	cyclictest	280	-21	systemd-journal	23:38:18	1
648711	99	44	40,3	cyclictest	744763	-21	kworker/u8:2+events_unbound	20:46:10	1
648717	99	43	38,3	cyclictest	868609	-21	kworker/u8:3+flush-8:0	23:06:13	2
648711	99	43	39,3	cyclictest	899257	-21	kworker/u8:0+flush-8:0	00:11:11	1
648711	99	43	36,5	cyclictest	928672	-21	kworker/u8:1+events_unbound	00:04:18	1
648711	99	42	38,3	cyclictest	744763	-21	kworker/u8:2+events_unbound	21:01:10	1
648711	99	42	38,3	cyclictest	744763	-21	kworker/u8:2+events_unbound	21:01:09	1
648711	99	42	37,4	cyclictest	655703	-21	kworker/u8:0+events_unbound	20:06:06	1
648711	99	42	33,6	cyclictest	933852	-21	kworker/u8:3+flush-8:0	23:56:12	1
648705	99	42	35,5	cyclictest	868609	-21	kworker/u8:3+events_unbound	23:01:10	0
648711	99	41	37,3	cyclictest	734465	-21	kworker/u8:1+events_unbound	22:25:53	1
648711	99	41	36,4	cyclictest	899257	-21	kworker/u8:0+events_unbound	00:21:00	1
648711	99	41	35,4	cyclictest	924036	-21	apt-get	23:45:52	1
648711	99	41	35,4	cyclictest	655703	-21	kworker/u8:0+events_unbound	19:46:07	1
648705	99	41	35,4	cyclictest	643659	-21	kworker/u8:3+flush-8:0	19:11:07	0
648705	99	41	34,5	cyclictest	280	-21	systemd-journal	20:31:16	0
648705	99	41	33,6	cyclictest	734856	-21	/usr/sbin/munin	20:36:05	0
648711	99	40	37,2	cyclictest	665372	-21	kworker/u8:3+events_unbound	20:51:06	1
648711	99	40	36,3	cyclictest	655703	-21	kworker/u8:0+flush-8:0	19:20:57	1
648705	99	40	33,5	cyclictest	280	-21	systemd-journal	21:35:00	0
648711	99	39	35,3	cyclictest	734465	-21	kworker/u8:1+events_unbound	21:06:09	1
648711	99	39	29,7	cyclictest	280	-21	systemd-journal	21:15:01	1
648705	99	39	35,3	cyclictest	655703	-21	kworker/u8:0+flush-8:0	20:06:10	0
648705	99	39	31,7	cyclictest	734465	-21	kworker/u8:1+events_unbound	21:51:06	0
648705	99	39	28,9	cyclictest	715369	-21	diskstats	20:15:56	0
648705	99	39	27,9	cyclictest	798191	-21	ntpq	21:36:04	0
648711	99	38	34,3	cyclictest	828704	-21	kworker/u8:2+flush-8:0	22:16:17	1
648711	99	38	34,3	cyclictest	793853	-21	kworker/u8:0+events_unbound	22:36:10	1
648705	99	38	33,3	cyclictest	962581	-21	kworker/u8:1+events_unbound	00:21:13	0
648705	99	38	28,8	cyclictest	783378	-21	ntpq	21:21:06	0
648705	99	38	27,8	cyclictest	280	-21	systemd-journal	22:50:00	0
648705	99	38	27,8	cyclictest	280	-21	systemd-journal	22:20:01	0
648711	99	37	33,3	cyclictest	854076	-21	kworker/u8:2+events_unbound	23:51:08	1
648705	99	37	33,3	cyclictest	863670	-21	kworker/u8:1+flush-8:0	22:46:13	0
648705	99	37	32,4	cyclictest	734465	-21	kworker/u8:1+events_unbound	22:26:08	0
648705	99	37	29,6	cyclictest	749431	-21	apt-get	20:50:01	0
648717	99	36	31,3	cyclictest	953496	-21	latency_hist	00:15:01	2
648717	99	36	29,4	cyclictest	754916	-21	apt-get	20:55:54	2
648705	99	36	32,3	cyclictest	868609	-21	kworker/u8:3+events_unbound	23:46:05	0
648705	99	36	32,3	cyclictest	675488	-21	kworker/u8:2+events_unbound	19:51:07	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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