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 Sat Jun 20, 2026 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1074358	99	83	60,20	cyclictest	1129699	-21	ntpq	20:00:34	0
1074362	99	75	68,5	cyclictest	1120724	-21	kworker/u8:3+flush-8:0	20:35:39	1
1074362	99	75	66,6	cyclictest	1136195	-21	kworker/u8:0+events_unbound	20:45:38	1
1074362	99	71	64,5	cyclictest	1280114	-21	kworker/u8:0+flush-8:0	23:10:35	1
1074362	99	71	63,6	cyclictest	1136195	-21	kworker/u8:0+events_unbound	20:55:35	1
1074362	99	70	62,6	cyclictest	1224946	-21	kworker/u8:2+flush-8:0	22:20:35	1
1074362	99	68	61,5	cyclictest	1086355	-21	kworker/u8:0+events_unbound	19:30:40	1
1074362	99	67	57,7	cyclictest	1095288	-21	kworker/u8:2+events_unbound	20:20:41	1
1074358	99	66	54,9	cyclictest	1085155	-21	ntpq	19:15:31	0
1074362	99	64	54,8	cyclictest	1289381	-21	ntpq	22:40:35	1
1074362	99	63	55,6	cyclictest	1329071	-21	kworker/u8:1+flush-8:0	00:30:36	1
1074358	99	63	54,6	cyclictest	1079247	-21	latency_hist	19:15:01	0
1074362	99	62	56,4	cyclictest	1064632	-21	kworker/u8:1+flush-8:0	19:10:25	1
1074362	99	62	54,6	cyclictest	1188518	-21	kworker/u8:2+flush-8:0	21:05:36	1
1074362	99	62	51,8	cyclictest	1244435	-21	ntpq	21:55:34	1
1074362	99	62	49,10	cyclictest	1353876	-21	ntpq	23:45:35	1
1074362	99	62	49,10	cyclictest	1353876	-21	ntpq	23:45:34	1
1074358	99	62	50,9	cyclictest	1219373	-21	ntpq	21:30:32	0
1074362	99	61	53,6	cyclictest	1319895	-21	kworker/u8:2+flush-8:0	23:25:36	1
1074358	99	61	52,7	cyclictest	1254612	-21	ntpq	22:05:33	0
1318608	2	60	0,3	chrt	75	-21	kworker/3:1-events	23:10:31	3
1074362	99	59	53,4	cyclictest	1348946	-21	kworker/u8:2+events_unbound	23:55:36	1
1074362	99	59	53,4	cyclictest	1348946	-21	kworker/u8:2+events_unbound	23:55:36	1
1074362	99	59	53,4	cyclictest	1136195	-21	kworker/u8:0+events_unbound	20:50:41	1
1074362	99	59	52,5	cyclictest	1151264	-21	kworker/u8:1+events_unbound	22:55:37	1
1074362	99	59	51,6	cyclictest	1335168	-21	kworker/u8:3+events_unbound	00:35:39	1
1074362	99	59	51,6	cyclictest	1255120	-21	kworker/u8:3+flush-8:0	22:25:36	1
1074362	99	59	48,8	cyclictest	1119881	-21	ntpq	19:50:36	1
1074358	99	59	48,8	cyclictest	1264520	-21	ntpq	22:15:34	0
1074358	99	59	38,5	cyclictest	1704890	-21	systemd-journal	23:40:00	0
1074362	99	58	53,3	cyclictest	1348946	-21	kworker/u8:2+events_unbound	00:05:34	1
1074362	99	58	52,4	cyclictest	1151264	-21	kworker/u8:1+flush-8:0	22:35:30	1
1074362	99	58	51,5	cyclictest	1383705	-21	kworker/u8:0+events_unbound	00:30:01	1
1074358	99	58	47,8	cyclictest	1348893	-21	ntpq	23:40:33	0
1360387	2	57	0,3	sleep3	75	-21	kworker/3:1-events	23:55:25	3
1360387	2	57	0,3	sleep3	75	-21	kworker/3:1-events	23:55:24	3
1074362	99	57	51,4	cyclictest	1095288	-21	kworker/u8:2+events_unbound	19:55:24	1
1227318	2	56	0,5	sleep3	0	-21	swapper/3	21:40:29	3
1140632	2	56	0,2	sleep3	48	1	ktimers/3	20:15:00	3
1074362	99	56	49,5	cyclictest	1159714	-21	ntpq	20:30:38	1
1074362	99	56	49,4	cyclictest	1255120	-21	kworker/u8:3+flush-8:0	22:15:26	1
1074362	99	56	46,7	cyclictest	1704890	-21	systemd-journal	19:25:40	1
1074362	99	56	45,8	cyclictest	1388681	-21	ntpq	00:20:37	1
1074362	99	55	49,4	cyclictest	1329071	-21	kworker/u8:1+flush-8:0	00:10:36	1
1074362	99	55	49,3	cyclictest	1329071	-21	kworker/u8:1+events_unbound	23:40:24	1
1074358	99	55	44,9	cyclictest	1274425	-21	ntpq	22:25:34	0
1074358	99	55	33,8	cyclictest	1239513	-21	ntpq	21:50:35	0
1074362	99	54	49,3	cyclictest	1095288	-21	kworker/u8:2+events_unbound	19:40:22	1
1074362	99	54	48,4	cyclictest	1151264	-21	kworker/u8:1+flush-8:0	21:40:40	1
1074362	99	54	48,4	cyclictest	1064632	-21	kworker/u8:1+events_unbound	19:35:42	1
1074362	99	54	48,4	cyclictest	1064632	-21	kworker/u8:1+events_unbound	19:35:42	1
1074362	99	54	46,6	cyclictest	1188518	-21	kworker/u8:2+flush-8:0	21:10:42	1
1074362	99	54	43,8	cyclictest	1255120	-21	kworker/u8:3+events_unbound	23:20:20	1
1074362	99	53	47,4	cyclictest	1280114	-21	kworker/u8:0+flush-8:0	23:15:32	1
1074362	99	53	45,6	cyclictest	1209540	-21	ntpq	21:20:36	1
1074358	99	53	46,5	cyclictest	1304119	-21	ntpq	22:55:33	0
1074358	99	53	42,8	cyclictest	1096537	-21	diskstats	19:30:25	0
1074362	99	52	48,3	cyclictest	1120724	-21	kworker/u8:3+events_unbound	21:30:34	1
1074362	99	52	45,5	cyclictest	1329071	-21	kworker/u8:1+flush-8:0	23:35:35	1
1074362	99	51	47,3	cyclictest	1151264	-21	kworker/u8:1+flush-8:0	21:45:24	1
1074362	99	51	45,4	cyclictest	1095288	-21	kworker/u8:2+events_unbound	20:00:37	1
1143219	2	50	0,2	chrt	0	-21	swapper/0	20:15:31	0
1074362	99	50	46,3	cyclictest	1348946	-21	kworker/u8:2+events_unbound	00:00:39	1
1074362	99	50	46,3	cyclictest	1348946	-21	kworker/u8:2+events_unbound	00:00:38	1
1074358	99	50	42,6	cyclictest	1294180	-21	ntpq	22:45:33	0
1074358	99	50	41,7	cyclictest	1704890	-21	systemd-journal	19:49:59	0
1074358	99	50	40,8	cyclictest	1160540	-21	apt-get	20:35:01	0
1074362	99	49	43,4	cyclictest	1240639	-21	kworker/u8:0+events_unbound	22:05:23	1
1074362	99	49	43,4	cyclictest	1120724	-21	kworker/u8:3+events_unbound	21:15:34	1
1074358	99	49	41,6	cyclictest	1124771	-21	ntpq	19:55:35	0
1185884	2	48	0,2	chrt	48	1	ktimers/3	21:00:23	3
1074362	99	48	42,5	cyclictest	1255120	-21	kworker/u8:3+events_unbound	22:10:25	1
1074362	99	48	41,5	cyclictest	1335168	-21	kworker/u8:3+events_unbound	23:50:39	1
1074362	99	48	41,5	cyclictest	1335168	-21	kworker/u8:3+events_unbound	23:50:38	1
1074362	99	48	39,6	cyclictest	1064632	-21	kworker/u8:1+flush-8:0	19:20:35	1
1074362	99	47	41,4	cyclictest	1329071	-21	kworker/u8:1+events_unbound	00:15:25	1
1074362	99	47	41,3	cyclictest	1136195	-21	kworker/u8:0+events_unbound	20:40:38	1
1074358	99	47	37,8	cyclictest	1204539	-21	ntpq	21:15:34	0
1074358	99	47	37,8	cyclictest	1139657	-21	ntpq	20:10:39	0
1074362	99	46	39,5	cyclictest	1280114	-21	kworker/u8:0+flush-8:0	22:50:37	1
1074362	99	46	35,8	cyclictest	1210670	-21	/usr/sbin/munin	21:25:38	1
1074358	99	46	39,5	cyclictest	1355037	-21	apt-get	23:50:20	0
1074358	99	46	39,5	cyclictest	1355037	-21	apt-get	23:50:19	0
1074358	99	46	39,5	cyclictest	1090128	-21	ntpq	19:20:33	0
1074358	99	46	36,8	cyclictest	1398475	-21	ntpq	00:30:34	0
1074358	99	46	36,7	cyclictest	1165706	-21	latency_hist	20:40:01	0
1074358	99	46	35,8	cyclictest	1334023	-21	ntpq	23:25:33	0
1074358	99	46	34,9	cyclictest	1704890	-21	systemd-journal	21:50:00	0
1074362	99	45	39,5	cyclictest	1151264	-21	kworker/u8:1+flush-8:0	21:50:36	1
1074362	99	45	38,5	cyclictest	1151264	-21	kworker/u8:1+flush-8:0	22:45:35	1
1074358	99	45	39,4	cyclictest	1318965	-21	ntpq	23:10:33	0
1074358	99	45	38,5	cyclictest	1151264	-21	kworker/u8:1+events_unbound	21:40:01	0
1074358	99	45	2,40	cyclictest	272130	-21	kworker/0:0+events	19:40:37	0
1074362	99	44	38,4	cyclictest	1280114	-21	kworker/u8:0+events_unbound	23:00:25	1
1074358	99	44	34,8	cyclictest	1403455	-21	ntpq	00:35:33	0
1074358	99	44	2,36	cyclictest	1210467	-21	kworker/0:1+events	22:00:22	0
1250721	2	43	0,21	sleep3	75	-21	kworker/3:1+events	22:05:01	3
1074364	99	43	37,4	cyclictest	1086355	-21	kworker/u8:0+flush-8:0	19:25:47	2
1074362	99	43	39,3	cyclictest	1151264	-21	kworker/u8:1+flush-8:0	23:05:44	1
1074362	99	43	36,5	cyclictest	1188518	-21	kworker/u8:2+flush-8:0	21:00:38	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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