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 Thu Dec 04, 2025 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1206583	2	94	0,5	chrt	0	-21	swapper/3	10:21:16	3
1288649	2	73	0,2	chrt	45	1	irq_work/3	11:46:12	3
1012069	99	68	59,7	cyclictest	282	-21	systemd-journal	07:20:01	2
1012064	99	63	57,4	cyclictest	1058545	-21	kworker/u8:1+events_unbound	08:25:01	0
1012064	99	62	56,4	cyclictest	1173690	-21	kworker/u8:1+events_unbound	10:00:01	0
1012064	99	61	55,4	cyclictest	1311999	-21	kworker/u8:2+events_unbound	12:16:07	0
1012064	99	60	55,3	cyclictest	1093898	-21	kworker/u8:0+events_unbound	10:20:01	0
1012069	99	58	49,6	cyclictest	282	-21	systemd-journal	09:16:07	2
1012064	99	57	51,5	cyclictest	187351	-21	kworker/u8:3+events_unbound	07:21:24	0
1012064	99	57	51,4	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	09:21:22	0
1012064	99	55	51,3	cyclictest	1232811	-21	kworker/u8:2+flush-8:0	10:51:22	0
1012064	99	55	50,3	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	09:41:08	0
1012067	99	54	46,6	cyclictest	282	-21	systemd-journal	11:00:00	1
1012064	99	53	43,7	cyclictest	1282771	-21	latency_hist	11:40:01	0
1012067	99	52	44,6	cyclictest	187351	-21	kworker/u8:3+flush-8:0	07:26:25	1
1012064	99	52	44,5	cyclictest	1011906	-21	latency_hist	07:10:01	0
1192302	2	51	0,3	chrt	48	1	ktimers/3	10:06:16	3
1012067	99	51	43,6	cyclictest	282	-21	systemd-journal	09:16:08	1
1012064	99	51	45,4	cyclictest	1286888	-21	kworker/u8:3+flush-8:0	12:36:23	0
1088426	2	50	0,2	sleep2	0	-21	swapper/2	08:21:23	2
1012064	99	50	46,3	cyclictest	1218166	-21	kworker/u8:3+flush-8:0	11:11:23	0
1012064	99	50	44,5	cyclictest	971518	-21	kworker/u8:2+flush-8:0	07:15:06	0
1012064	99	50	43,5	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	08:41:21	0
1012064	99	49	45,3	cyclictest	1083980	-21	kworker/u8:3+flush-8:0	09:26:25	0
1012064	99	49	39,8	cyclictest	282	-21	systemd-journal	11:35:00	0
1012064	99	48	43,4	cyclictest	1083980	-21	kworker/u8:3+flush-8:0	08:56:30	0
1012064	99	48	42,4	cyclictest	971518	-21	kworker/u8:2+flush-8:0	07:11:16	0
1012064	99	48	42,4	cyclictest	1173690	-21	kworker/u8:1+events_unbound	10:46:22	0
1012064	99	48	39,6	cyclictest	1188564	-21	latency_hist	10:05:01	0
1012069	99	47	37,7	cyclictest	282	-21	systemd-journal	08:30:00	2
1012064	99	47	42,4	cyclictest	1043366	-21	kworker/u8:2+flush-8:0	07:41:18	0
1012064	99	47	41,4	cyclictest	1043366	-21	kworker/u8:2+flush-8:0	08:01:23	0
1012064	99	47	39,6	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	09:36:21	0
1012067	99	46	37,7	cyclictest	282	-21	systemd-journal	11:45:00	1
1012067	99	46	37,6	cyclictest	1292954	-21	/usr/sbin/munin	11:51:15	1
1012064	99	46	41,4	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	09:16:22	0
1012064	99	46	39,5	cyclictest	1083980	-21	kworker/u8:3+events_unbound	08:35:00	0
1012064	99	46	37,7	cyclictest	282	-21	systemd-journal	12:35:00	0
1012064	99	46	37,7	cyclictest	282	-21	systemd-journal	12:34:59	0
1012064	99	46	33,11	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	11:06:17	0
1046176	2	45	0,6	sleep2	0	-21	swapper/2	07:41:15	2
1012069	99	45	36,7	cyclictest	1158579	-21	apt-get	09:35:00	2
1012067	99	45	38,5	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	08:41:24	1
1012064	99	45	40,3	cyclictest	1265412	-21	kworker/u8:1+events_unbound	11:56:19	0
1012064	99	45	40,3	cyclictest	1073810	-21	kworker/u8:0+events_unbound	08:10:16	0
1012064	99	45	40,3	cyclictest	1043366	-21	kworker/u8:2+flush-8:0	08:06:19	0
1012064	99	45	34,9	cyclictest	282	-21	systemd-journal	10:56:17	0
1012067	99	44	40,3	cyclictest	1083980	-21	kworker/u8:3+events_unbound	10:11:23	1
1012067	99	44	37,5	cyclictest	1058855	-21	apt-get	07:56:03	1
1012064	99	44	39,4	cyclictest	1265412	-21	kworker/u8:1+flush-8:0	11:26:22	0
1012064	99	44	38,5	cyclictest	1043366	-21	kworker/u8:2+flush-8:0	07:46:17	0
1012064	99	44	38,4	cyclictest	1173690	-21	kworker/u8:1+events_unbound	10:26:17	0
1012067	99	43	37,4	cyclictest	1198758	-21	apt-get	10:16:04	1
1012067	99	43	35,6	cyclictest	1149006	-21	apt-get	09:26:05	1
1012067	99	43	34,7	cyclictest	282	-21	systemd-journal	09:46:17	1
1012067	99	43	33,8	cyclictest	282	-21	systemd-journal	10:55:00	1
1012067	99	43	33,8	cyclictest	282	-21	systemd-journal	09:56:16	1
1012064	99	43	39,3	cyclictest	1173690	-21	kworker/u8:1+flush-8:0	10:41:21	0
1012064	99	43	36,5	cyclictest	1173690	-21	kworker/u8:1+flush-8:0	10:06:20	0
1145762	2	42	0,2	sleep3	586	-21	kworker/3:2+events	09:21:13	3
1012067	99	42	36,4	cyclictest	1232811	-21	kworker/u8:2+flush-8:0	11:06:22	1
1012064	99	42	38,3	cyclictest	1218166	-21	kworker/u8:3+events_unbound	11:16:23	0
1012064	99	42	36,4	cyclictest	1093898	-21	kworker/u8:0+events_unbound	09:46:19	0
1012067	99	41	33,6	cyclictest	282	-21	systemd-journal	12:30:17	1
1012067	99	41	33,6	cyclictest	282	-21	systemd-journal	12:30:17	1
1012064	99	41	37,3	cyclictest	1301720	-21	kworker/u8:0+flush-8:0	12:01:24	0
1012064	99	41	37,3	cyclictest	1138157	-21	kworker/u8:1+events_unbound	09:31:18	0
1012064	99	41	30,8	cyclictest	1127682	-21	ntpq	09:01:16	0
1012069	99	40	29,9	cyclictest	282	-21	systemd-journal	12:24:59	2
1012067	99	40	35,3	cyclictest	1118438	-21	gpgv	08:54:59	1
1012064	99	39	35,3	cyclictest	1218166	-21	kworker/u8:3+events_unbound	10:36:24	0
1012064	99	39	34,4	cyclictest	1058545	-21	kworker/u8:1+events_unbound	08:26:15	0
1012064	99	39	33,4	cyclictest	1093898	-21	kworker/u8:0+events_unbound	10:21:21	0
1012064	99	39	33,4	cyclictest	1019163	-21	kworker/u8:0+flush-8:0	07:31:18	0
1012067	99	38	32,5	cyclictest	1173690	-21	kworker/u8:1+events_unbound	10:41:17	1
1012067	99	38	27,8	cyclictest	1048684	-21	latency_hist	07:45:01	1
1012064	99	38	33,4	cyclictest	187351	-21	kworker/u8:3+events_unbound	07:51:25	0
1012064	99	38	33,4	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	09:11:20	0
1012064	99	38	32,4	cyclictest	187351	-21	kworker/u8:3+events_unbound	07:36:12	0
1012067	99	37	32,4	cyclictest	1084016	-21	kworker/u8:4+events_unbound	08:21:08	1
1012067	99	37	31,5	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	11:21:23	1
1012067	99	37	30,5	cyclictest	1253142	-21	apt-get	11:11:04	1
1012067	99	37	30,5	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	09:51:18	1
1012067	99	37	29,6	cyclictest	1034136	-21	apt-get	07:31:03	1
1012064	99	37	32,3	cyclictest	187351	-21	kworker/u8:3+flush-8:0	07:26:14	0
1012064	99	37	31,5	cyclictest	1108801	-21	kworker/u8:1+flush-8:0	08:51:20	0
1011699	2	37	4,28	sleep3	0	-21	swapper/3	07:07:38	3
1012064	99	36	32,3	cyclictest	1232811	-21	kworker/u8:2+flush-8:0	11:21:27	0
1012064	99	36	31,4	cyclictest	1173690	-21	kworker/u8:1+flush-8:0	10:31:22	0
1012064	99	36	30,4	cyclictest	1286888	-21	kworker/u8:3+flush-8:0	11:51:13	0
1012064	99	36	24,4	cyclictest	1265412	-21	kworker/u8:1+events_unbound	11:41:08	0
1011831	2	36	3,9	sleep1	0	-21	swapper/1	07:09:21	1
1012067	99	35	31,3	cyclictest	1265412	-21	kworker/u8:1+events_unbound	11:39:59	1
1012067	99	35	29,5	cyclictest	1311999	-21	kworker/u8:2+events_unbound	12:26:09	1
1012067	99	35	29,5	cyclictest	1083980	-21	kworker/u8:3+flush-8:0	08:36:20	1
1012067	99	35	28,5	cyclictest	282	-21	systemd-journal	07:15:00	1
1012067	99	35	26,6	cyclictest	282	-21	systemd-journal	08:00:13	1
1012064	99	35	30,4	cyclictest	1093898	-21	kworker/u8:0+flush-8:0	09:51:20	0
1012064	99	35	29,4	cyclictest	1218166	-21	kworker/u8:3+events_unbound	11:01:17	0
1012064	99	35	29,4	cyclictest	1073810	-21	kworker/u8:0+events_unbound	08:16:17	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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