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 Sun Sep 13, 2026 00:44:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1055749	2	207	0,2	sleep3	48	1	ktimers/3	21:40:00	3
914633	2	71	0,4	sleep0	0	-21	swapper/0	19:19:15	0
959386	2	51	0,5	sleep3	0	-21	swapper/3	20:04:15	3
904272	99	51	46,4	cyclictest	946274	-21	kworker/u8:0+events_unbound	20:14:10	1
904272	99	49	45,3	cyclictest	1095858	-21	kworker/u8:1+events_unbound	22:29:06	1
904277	99	47	37,8	cyclictest	278	-21	systemd-journal	19:20:00	2
904272	99	45	39,4	cyclictest	1180314	-21	kworker/u8:2+flush-8:0	00:14:10	1
904272	99	45	39,4	cyclictest	1180314	-21	kworker/u8:2+flush-8:0	00:14:10	1
904272	99	43	37,4	cyclictest	1110941	-21	kworker/u8:3+events_unbound	22:59:14	1
904272	99	43	36,5	cyclictest	1185280	-21	kworker/u8:3+flush-8:0	00:09:19	1
904272	99	43	33,8	cyclictest	1224460	-21	ntpq	00:29:16	1
904277	99	42	33,6	cyclictest	1110778	-21	cat	22:35:01	2
904272	99	42	37,4	cyclictest	548536	-21	kworker/u8:1+events_unbound	19:44:05	1
904272	99	42	36,5	cyclictest	1155164	-21	kworker/u8:2+flush-8:0	23:24:09	1
904272	99	42	35,5	cyclictest	3726084	-21	kworker/u8:2+flush-8:0	19:29:19	1
904272	99	42	35,5	cyclictest	1222774	-21	kworker/u8:3+flush-8:0	00:34:18	1
904270	99	42	37,4	cyclictest	1011076	-21	kworker/u8:0+flush-8:0	21:34:20	0
904272	99	41	37,3	cyclictest	1011076	-21	kworker/u8:0+events_unbound	21:24:11	1
904272	99	41	36,4	cyclictest	1095858	-21	kworker/u8:1+flush-8:0	22:24:20	1
904272	99	41	36,3	cyclictest	1025954	-21	kworker/u8:1+flush-8:0	21:29:23	1
904272	99	41	34,5	cyclictest	930965	-21	latency_hist	19:35:01	1
904272	99	40	36,3	cyclictest	986460	-21	kworker/u8:2+events_unbound	22:14:06	1
904272	99	40	36,3	cyclictest	1095858	-21	kworker/u8:1+events_unbound	22:45:00	1
904272	99	40	35,3	cyclictest	946274	-21	kworker/u8:0+events_unbound	20:34:24	1
904272	99	39	35,3	cyclictest	926023	-21	kworker/u8:3+flush-8:0	20:24:06	1
904272	99	39	34,3	cyclictest	1135396	-21	kworker/u8:1+events_unbound	23:29:19	1
904272	99	39	33,5	cyclictest	1205323	-21	kworker/u8:0+flush-8:0	00:39:23	1
904272	99	39	32,5	cyclictest	926023	-21	kworker/u8:3+flush-8:0	20:19:21	1
904270	99	39	34,4	cyclictest	1135396	-21	kworker/u8:1+flush-8:0	23:39:14	0
904270	99	39	32,5	cyclictest	1121187	-21	apt-get	22:49:03	0
904272	99	38	34,3	cyclictest	1095858	-21	kworker/u8:1+events_unbound	22:34:21	1
904272	99	38	32,3	cyclictest	1135396	-21	kworker/u8:1+events_unbound	23:49:03	1
904272	99	38	28,8	cyclictest	278	-21	systemd-journal	00:04:14	1
904272	99	38	27,9	cyclictest	915532	-21	ntpq	19:19:19	1
904270	99	38	25,11	cyclictest	1000919	-21	cron	20:45:00	0
904272	99	37	33,3	cyclictest	1180314	-21	kworker/u8:2+events_unbound	00:19:11	1
904272	99	37	30,4	cyclictest	986460	-21	kworker/u8:2+flush-8:0	21:14:22	1
904272	99	37	29,6	cyclictest	3726084	-21	kworker/u8:2+flush-8:0	20:09:14	1
904270	99	37	27,7	cyclictest	946049	-21	latency_hist	19:50:00	0
904272	99	36	31,3	cyclictest	1110941	-21	kworker/u8:3+events_unbound	22:54:22	1
904272	99	36	30,4	cyclictest	946274	-21	kworker/u8:0+flush-8:0	19:59:22	1
904272	99	36	29,5	cyclictest	926023	-21	kworker/u8:3+flush-8:0	19:49:24	1
904272	99	36	29,5	cyclictest	1011076	-21	kworker/u8:0+flush-8:0	23:44:22	1
904272	99	36	28,5	cyclictest	1011076	-21	kworker/u8:0+flush-8:0	21:34:14	1
904270	99	36	31,4	cyclictest	926023	-21	kworker/u8:3+flush-8:0	20:54:10	0
904270	99	36	31,4	cyclictest	548536	-21	kworker/u8:1+flush-8:0	19:44:18	0
904272	99	35	31,3	cyclictest	1135396	-21	kworker/u8:1+events_unbound	23:39:05	1
904272	99	35	29,5	cyclictest	1180314	-21	kworker/u8:2+flush-8:0	23:54:23	1
904272	99	35	29,4	cyclictest	548536	-21	kworker/u8:1+flush-8:0	19:39:22	1
904272	99	35	29,4	cyclictest	1110941	-21	kworker/u8:3+flush-8:0	22:39:07	1
904272	99	35	28,5	cyclictest	1060964	-21	kworker/u8:3+flush-8:0	22:04:23	1
904272	99	35	27,6	cyclictest	926023	-21	kworker/u8:3+flush-8:0	20:29:15	1
904270	99	35	29,5	cyclictest	986460	-21	kworker/u8:2+flush-8:0	21:09:21	0
904272	99	34	28,5	cyclictest	986460	-21	kworker/u8:2+events_unbound	21:49:04	1
904272	99	34	27,5	cyclictest	1011076	-21	kworker/u8:0+flush-8:0	21:04:12	1
904272	99	34	27,4	cyclictest	1135396	-21	kworker/u8:1+flush-8:0	23:34:15	1
904272	99	34	23,7	cyclictest	278	-21	systemd-journal	23:20:00	1
904270	99	34	30,3	cyclictest	1180320	-21	systemd-run	23:45:00	0
904270	99	34	26,6	cyclictest	1016017	-21	latency_hist	21:00:00	0
899737	2	34	4,10	sleep2	0	-21	swapper/2	19:08:50	2
904272	99	33	28,4	cyclictest	946274	-21	kworker/u8:0+events_unbound	20:39:10	1
904272	99	33	28,4	cyclictest	1135396	-21	kworker/u8:1+events_unbound	23:59:20	1
904272	99	33	26,5	cyclictest	1011076	-21	kworker/u8:0+flush-8:0	21:44:21	1
904272	99	33	23,6	cyclictest	1055552	-21	latency_hist	21:40:01	1
904270	99	33	29,3	cyclictest	1180314	-21	kworker/u8:2+events_unbound	00:04:11	0
904270	99	33	26,5	cyclictest	1035164	-21	ntpq	21:19:15	0
904277	99	32	24,6	cyclictest	1055548	-21	apt-get	21:40:00	2
904272	99	32	27,4	cyclictest	946274	-21	kworker/u8:0+flush-8:0	20:49:20	1
904272	99	32	27,3	cyclictest	986460	-21	kworker/u8:2+events_unbound	21:59:05	1
904272	99	32	27,3	cyclictest	904265	-21	cyclictest	23:04:23	1
904277	99	31	25,4	cyclictest	1085367	-21	unixbench_multi	22:09:22	2
904272	99	31	27,2	cyclictest	1081368	-21	fschecks_count	22:09:07	1
904272	99	31	25,5	cyclictest	1205323	-21	kworker/u8:0+events_unbound	00:24:18	1
904270	99	31	27,3	cyclictest	1	-21	systemd	20:50:00	0
904270	99	31	26,4	cyclictest	1135396	-21	kworker/u8:1+flush-8:0	23:33:46	0
904270	99	31	22,7	cyclictest	980640	-21	apt-get	20:25:00	0
904272	99	30	25,3	cyclictest	1095858	-21	kworker/u8:1+events_unbound	22:49:20	1
904272	99	30	24,3	cyclictest	0	-21	swapper/1	20:54:08	1
904270	99	30	26,2	cyclictest	1219474	-21	needreboot	00:24:17	0
904270	99	30	21,6	cyclictest	1090669	-21	latency_hist	22:15:01	0
904270	99	30	21,6	cyclictest	1060739	-21	latency_hist	21:45:01	0
904272	99	29	25,3	cyclictest	1011076	-21	kworker/u8:0+events_unbound	21:09:08	1
904272	99	29	24,3	cyclictest	3726084	-21	kworker/u8:2+events_unbound	19:25:01	1
904272	99	29	24,3	cyclictest	1016058	-21	systemd-run	21:00:00	1
904272	99	29	23,4	cyclictest	926023	-21	kworker/u8:3+events_unbound	20:44:22	1
904272	99	29	22,5	cyclictest	548536	-21	kworker/u8:1+events_unbound	19:14:05	1
904272	99	29	21,6	cyclictest	986460	-21	kworker/u8:2+flush-8:0	21:54:21	1
904277	99	28	24,3	cyclictest	955921	-21	sendmail	20:00:00	2
904277	99	28	24,2	cyclictest	976292	-21	aten2_r5power_c	20:24:06	2
904277	99	28	24,2	cyclictest	1001709	-21	cpuspeed_turbos	20:49:03	2
904272	99	28	24,2	cyclictest	0	-21	swapper/1	22:20:00	1
904270	99	28	3,24	cyclictest	940982	-21	kworker/0:1+events	22:08:55	0
904270	99	28	23,4	cyclictest	390	-21	dbus-daemon	23:20:01	0
904270	99	28	23,3	cyclictest	946274	-21	kworker/u8:0+events_unbound	20:35:01	0
904270	99	28	23,3	cyclictest	1164695	-21	needreboot	23:29:13	0
904270	99	28	2,25	cyclictest	940982	-21	kworker/0:1+events	00:05:35	0
904270	99	28	22,5	cyclictest	1011076	-21	kworker/u8:0+flush-8:0	21:54:38	0
904270	99	28	22,4	cyclictest	1229367	-21	needreboot	00:34:14	0
904270	99	28	22,4	cyclictest	1118433	-21	kthreadcore	22:44:13	0
904270	99	28	21,5	cyclictest	1205323	-21	kworker/u8:0+events_unbound	00:39:20	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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