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 Mon Aug 17, 2026 00:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
986941	99	71	53,16	cyclictest	954685	-21	kworker/u8:2+flush-8:0	22:10:00	0
986944	99	60	54,4	cyclictest	1253458	-21	kworker/u8:3+events_unbound	23:57:59	1
986944	99	57	51,5	cyclictest	1203170	-21	kworker/u8:2+flush-8:0	23:32:56	1
986944	99	57	51,4	cyclictest	1203170	-21	kworker/u8:2+events_unbound	22:57:57	1
986941	99	56	50,4	cyclictest	1196290	-21	kworker/u8:1+flush-8:0	22:52:59	0
986944	99	55	50,3	cyclictest	1073674	-21	kworker/u8:1+events_unbound	21:25:00	1
986944	99	55	49,4	cyclictest	1158766	-21	kworker/u8:0+events_unbound	22:22:56	1
986944	99	54	45,7	cyclictest	1208260	-21	latency_hist	22:50:01	1
986944	99	53	48,4	cyclictest	1273122	-21	kworker/u8:1+events_unbound	00:02:59	1
986944	99	53	47,4	cyclictest	954685	-21	kworker/u8:2+flush-8:0	20:17:58	1
986944	99	53	47,4	cyclictest	954685	-21	kworker/u8:2+events_unbound	20:47:43	1
986944	99	53	47,4	cyclictest	1158766	-21	kworker/u8:0+events_unbound	23:12:57	1
986944	99	52	47,3	cyclictest	1129002	-21	kworker/u8:0+flush-8:0	21:37:55	1
986944	99	52	47,3	cyclictest	1129002	-21	kworker/u8:0+flush-8:0	21:37:55	1
986941	99	51	47,3	cyclictest	1073674	-21	kworker/u8:1+flush-8:0	21:00:01	0
986944	99	50	45,4	cyclictest	954685	-21	kworker/u8:2+events_unbound	20:27:47	1
986944	99	50	45,3	cyclictest	954685	-21	kworker/u8:2+events_unbound	22:12:47	1
986944	99	50	44,4	cyclictest	954685	-21	kworker/u8:2+events_unbound	22:07:44	1
986941	99	50	38,9	cyclictest	1132993	-21	ntpq	21:32:55	0
986944	99	49	44,3	cyclictest	1073674	-21	kworker/u8:1+events_unbound	21:03:00	1
986944	99	49	43,4	cyclictest	1273122	-21	kworker/u8:1+flush-8:0	00:07:58	1
986944	99	49	41,6	cyclictest	1273122	-21	kworker/u8:1+flush-8:0	00:12:55	1
986944	99	49	38,8	cyclictest	1073674	-21	kworker/u8:1+flush-8:0	20:57:54	1
986944	99	49	38,4	cyclictest	1203170	-21	kworker/u8:2+events_unbound	23:07:50	1
986948	99	48	43,4	cyclictest	1158766	-21	kworker/u8:0+flush-8:0	22:40:00	2
986944	99	48	38,3	cyclictest	1019459	-21	kworker/u8:3+flush-8:0	19:52:43	1
986944	99	47	41,4	cyclictest	954685	-21	kworker/u8:2+flush-8:0	19:57:52	1
986944	99	47	41,4	cyclictest	137619	-21	kworker/u8:0+flush-8:0	19:17:55	1
986944	99	47	39,6	cyclictest	1198346	-21	latency_hist	22:40:01	1
986941	99	47	38,6	cyclictest	1223358	-21	latency_hist	23:05:01	0
986941	99	47	36,8	cyclictest	275	-21	systemd-journal	22:35:00	0
986944	99	46	42,3	cyclictest	954685	-21	kworker/u8:2+events_unbound	20:32:47	1
986944	99	46	40,5	cyclictest	1081422	-21	kworker/u8:3+events_unbound	20:42:55	1
986944	99	46	39,5	cyclictest	943956	-21	kworker/u8:3+flush-8:0	19:12:53	1
986941	99	46	36,8	cyclictest	1088036	-21	ntpq	20:47:54	0
986941	99	46	36,7	cyclictest	1153531	-21	latency_hist	21:55:01	0
986941	99	46	1,41	cyclictest	1	-21	systemd	22:55:55	0
986941	99	46	0,43	cyclictest	1	-21	systemd	20:40:00	0
986944	99	45	41,3	cyclictest	1158766	-21	kworker/u8:0+events_unbound	23:22:55	1
986944	99	45	40,4	cyclictest	1273122	-21	kworker/u8:1+flush-8:0	00:32:48	1
986944	99	45	40,4	cyclictest	1258467	-21	kworker/u8:0+events_unbound	00:22:44	1
986944	99	45	39,4	cyclictest	1019459	-21	kworker/u8:3+events_unbound	20:02:54	1
986944	99	45	37,6	cyclictest	954685	-21	kworker/u8:2+flush-8:0	21:32:47	1
986944	99	45	36,7	cyclictest	986777	-21	latency_hist	19:10:00	1
986941	99	45	38,5	cyclictest	1248319	-21	latency_hist	23:30:01	0
986944	99	44	39,4	cyclictest	1081422	-21	kworker/u8:3+flush-8:0	20:52:44	1
986944	99	44	39,3	cyclictest	954685	-21	kworker/u8:2+events_unbound	19:27:51	1
986944	99	44	39,3	cyclictest	954685	-21	kworker/u8:2+events_unbound	19:27:50	1
986944	99	43	38,4	cyclictest	954685	-21	kworker/u8:2+events_unbound	22:17:43	1
986944	99	43	37,4	cyclictest	1073674	-21	kworker/u8:1+flush-8:0	21:27:47	1
986944	99	43	35,6	cyclictest	1253458	-21	kworker/u8:3+flush-8:0	23:37:55	1
986944	99	43	35,6	cyclictest	1183962	-21	apt-get	22:27:39	1
986944	99	43	35,6	cyclictest	1108769	-21	latency_hist	21:10:01	1
986948	99	42	34,6	cyclictest	1293186	-21	turbostat.cron	00:15:01	2
986944	99	42	37,4	cyclictest	137619	-21	kworker/u8:0+events_unbound	19:45:03	1
986944	99	42	36,5	cyclictest	1019459	-21	kworker/u8:3+events_unbound	20:12:43	1
986944	99	42	36,4	cyclictest	1138513	-21	kworker/u8:3+flush-8:0	21:47:47	1
986944	99	42	35,5	cyclictest	1293599	-21	kworker/u8:2+flush-8:0	00:17:58	1
986948	99	40	34,4	cyclictest	1093687	-21	apt-get	20:55:00	2
986944	99	40	36,3	cyclictest	954685	-21	kworker/u8:2+events_unbound	19:20:07	1
986944	99	40	36,3	cyclictest	1293599	-21	kworker/u8:2+flush-8:0	00:38:00	1
986944	99	40	35,4	cyclictest	1019459	-21	kworker/u8:3+flush-8:0	20:22:46	1
986944	99	40	31,7	cyclictest	1262561	-21	ntpq	23:42:56	1
986941	99	40	32,5	cyclictest	1019391	-21	wc	19:40:01	0
986941	99	40	31,7	cyclictest	1112992	-21	ntpq	21:12:54	0
986944	99	39	35,3	cyclictest	1258467	-21	kworker/u8:0+events_unbound	23:47:59	1
986944	99	39	33,4	cyclictest	1218663	-21	kworker/u8:3+flush-8:0	23:17:57	1
1059975	2	39	0,1	sleep0	1059979	-21	sed	20:22:46	0
986944	99	38	33,4	cyclictest	137619	-21	kworker/u8:0+events_unbound	19:42:53	1
986941	99	38	29,6	cyclictest	1228300	-21	latency_hist	23:10:00	0
986944	99	37	31,4	cyclictest	1168850	-21	kworker/u8:3+events_unbound	22:42:52	1
986941	99	37	29,6	cyclictest	1312257	-21	ntpq	00:32:54	0
986944	99	36	28,6	cyclictest	1153958	-21	/usr/sbin/munin	21:57:51	1
986941	99	36	31,4	cyclictest	954685	-21	kworker/u8:2+flush-8:0	19:20:00	0
986941	99	36	28,6	cyclictest	1008613	-21	latency_hist	19:30:00	0
986941	99	36	28,6	cyclictest	1008613	-21	latency_hist	19:30:00	0
986941	99	36	25,8	cyclictest	1093687	-21	apt-get	20:55:00	0
986941	99	36	1,30	cyclictest	944618	-21	kworker/0:1+events	19:10:00	0
986941	99	36	1,28	cyclictest	1113727	-21	kworker/0:2+events	22:47:38	0
1210606	2	36	0,5	sleep3	0	-21	swapper/3	22:52:49	3
986944	99	35	31,3	cyclictest	1158766	-21	kworker/u8:0+events_unbound	23:27:50	1
986944	99	35	30,3	cyclictest	954685	-21	kworker/u8:2+flush-8:0	22:32:51	1
986944	99	35	29,4	cyclictest	275	-21	systemd-journal	21:15:00	1
986944	99	35	28,5	cyclictest	1196290	-21	kworker/u8:1+events_unbound	22:52:58	1
986944	99	35	27,6	cyclictest	275	-21	systemd-journal	19:38:55	1
986941	99	35	1,32	cyclictest	1268169	-21	kworker/0:0+events	00:27:54	0
986944	99	34	30,3	cyclictest	1203170	-21	kworker/u8:2+events_unbound	23:52:48	1
986944	99	34	29,4	cyclictest	1258467	-21	kworker/u8:0+events_unbound	00:27:49	1
986944	99	34	29,3	cyclictest	1151218	-21	kthreadcore	21:52:49	1
986941	99	34	3,28	cyclictest	1113727	-21	kworker/0:2+events	22:12:40	0
986941	99	34	30,3	cyclictest	1083555	-21	munin-plugin-st	20:45:00	0
986941	99	34	28,4	cyclictest	1282550	-21	ntpq	00:02:54	0
986941	99	34	27,4	cyclictest	1313415	-21	apt-get	00:37:42	0
986941	99	34	24,8	cyclictest	1162695	-21	ntpq	22:02:50	0
1024861	2	34	0,4	chrt	0	-21	swapper/3	19:47:42	3
986948	99	33	21,10	cyclictest	1138645	-21	cat	21:40:00	2
986948	99	33	21,10	cyclictest	1138645	-21	cat	21:40:00	2
986944	99	33	28,3	cyclictest	1073674	-21	kworker/u8:1+events_unbound	21:17:44	1
986941	99	33	9,22	cyclictest	944618	-21	kworker/0:1+events	20:32:40	0
986941	99	33	8,23	cyclictest	1113727	-21	kworker/0:2+events	23:17:56	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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