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
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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 Aug 25, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
724300	2	186	0,5	sleep3	0	-21	swapper/3	10:12:45	3
659425	2	181	0,3	sleep3	0	-21	swapper/3	09:07:44	3
548551	2	159	0,3	sleep3	575	-21	kworker/3:2+events	07:17:48	3
644565	2	61	0,3	sleep3	575	-21	kworker/3:2-events	08:52:43	3
815773	2	60	0,2	sleep0	20	1	rcuc/0	11:47:41	0
539513	99	60	54,4	cyclictest	534482	-21	kworker/u8:0+events_unbound	07:15:02	1
539513	99	55	50,4	cyclictest	824756	-21	kworker/u8:3+events_unbound	12:22:52	1
539513	99	54	48,4	cyclictest	590866	-21	kworker/u8:2+flush-8:0	08:57:51	1
539508	99	53	42,8	cyclictest	859458	-21	latency_hist	12:30:00	0
539513	99	52	46,4	cyclictest	621193	-21	kworker/u8:3+events_unbound	09:30:01	1
822446	2	51	0,3	sleep3	575	-21	kworker/3:2+events	11:52:42	3
539513	99	51	45,4	cyclictest	804955	-21	kworker/u8:0+flush-8:0	11:37:50	1
539513	99	50	45,3	cyclictest	705195	-21	kworker/u8:1+flush-8:0	10:12:54	1
539513	99	50	44,4	cyclictest	740252	-21	kworker/u8:1+events_unbound	10:37:39	1
773988	2	49	0,3	chrt	20	1	rcuc/0	11:02:50	0
539513	99	49	43,4	cyclictest	740252	-21	kworker/u8:1+events_unbound	12:32:35	1
539513	99	49	39,7	cyclictest	275	-21	systemd-journal	08:55:01	1
539513	99	48	41,5	cyclictest	740252	-21	kworker/u8:1+flush-8:0	11:17:53	1
539513	99	48	39,7	cyclictest	544366	-21	latency_hist	07:15:01	1
539513	99	47	41,4	cyclictest	730318	-21	kworker/u8:2+events_unbound	10:22:46	1
539513	99	47	41,4	cyclictest	730318	-21	kworker/u8:2+events_unbound	10:22:46	1
539508	99	47	29,15	cyclictest	640766	-21	latency_hist	08:50:01	0
539508	99	47	24,19	cyclictest	789697	-21	apt-get	11:20:01	0
539513	99	46	39,5	cyclictest	824756	-21	kworker/u8:3+flush-8:0	12:02:52	1
539513	99	46	39,5	cyclictest	740252	-21	kworker/u8:1+flush-8:0	10:52:47	1
539513	99	46	39,5	cyclictest	621193	-21	kworker/u8:3+events_unbound	08:42:45	1
539513	99	46	39,5	cyclictest	590866	-21	kworker/u8:2+flush-8:0	09:02:45	1
539513	99	45	38,5	cyclictest	784945	-21	kworker/u8:3+flush-8:0	11:32:41	1
539508	99	45	27,16	cyclictest	401	-21	dbus-daemon	07:25:00	0
539513	99	44	39,3	cyclictest	740252	-21	kworker/u8:1+events_unbound	12:00:01	1
539513	99	44	38,4	cyclictest	621193	-21	kworker/u8:3+events_unbound	09:10:01	1
539513	99	44	38,4	cyclictest	590866	-21	kworker/u8:2+flush-8:0	08:37:48	1
539508	99	44	23,18	cyclictest	275	-21	systemd-journal	11:32:50	0
539513	99	43	39,3	cyclictest	3930081	-21	kworker/u8:1+flush-8:0	07:43:50	1
539513	99	43	37,4	cyclictest	3930081	-21	kworker/u8:1+events_unbound	09:15:01	1
539513	99	43	36,4	cyclictest	804955	-21	kworker/u8:0+flush-8:0	11:52:52	1
539513	99	42	37,4	cyclictest	590866	-21	kworker/u8:2+flush-8:0	09:20:00	1
539513	99	42	35,5	cyclictest	774636	-21	kworker/u8:2+flush-8:0	12:07:37	1
539513	99	41	35,4	cyclictest	740252	-21	kworker/u8:1+events_unbound	11:47:37	1
539513	99	41	33,6	cyclictest	810149	-21	apt-get	11:42:32	1
539513	99	41	32,7	cyclictest	275	-21	systemd-journal	08:31:20	1
539517	99	40	31,7	cyclictest	695359	-21	gpgv	09:45:00	2
539517	99	40	14,8	cyclictest	275	-21	systemd-journal	10:20:20	2
539517	99	40	14,8	cyclictest	275	-21	systemd-journal	10:20:20	2
539513	99	40	36,3	cyclictest	590866	-21	kworker/u8:2+flush-8:0	09:47:39	1
539513	99	40	34,4	cyclictest	740252	-21	kworker/u8:1+events_unbound	10:47:46	1
539513	99	40	32,5	cyclictest	570962	-21	latency_hist	07:40:01	1
539513	99	40	31,7	cyclictest	596017	-21	latency_hist	08:05:00	1
539508	99	40	32,6	cyclictest	749857	-21	latency_hist	10:40:01	0
539508	99	40	23,15	cyclictest	715920	-21	cpuspeed_turbos	10:07:36	0
539508	99	40	21,2	cyclictest	849352	-21	cron	12:20:00	0
539508	99	40	20,2	cyclictest	0	-21	swapper/0	09:57:53	0
539508	99	40	18,6	cyclictest	591479	-21	/usr/sbin/munin	08:02:51	0
539508	99	40	16,9	cyclictest	626622	-21	diskstats	08:37:39	0
539242	2	40	3,8	sleep1	0	-21	swapper/1	07:08:56	1
539517	99	39	24,13	cyclictest	544138	-21	unixbench_singl	07:12:53	2
539517	99	39	23,13	cyclictest	736408	-21	kthreadcore	10:27:38	2
539513	99	39	35,3	cyclictest	824756	-21	kworker/u8:3+flush-8:0	12:12:49	1
539513	99	39	34,3	cyclictest	705195	-21	kworker/u8:1+flush-8:0	10:10:01	1
539513	99	39	34,3	cyclictest	3930081	-21	kworker/u8:1+events_unbound	09:32:40	1
539513	99	39	33,4	cyclictest	720402	-21	kworker/u8:3+flush-8:0	10:32:37	1
539513	99	39	32,5	cyclictest	720402	-21	kworker/u8:3+events_unbound	10:27:34	1
539513	99	39	30,6	cyclictest	275	-21	systemd-journal	10:43:20	1
539508	99	39	32,5	cyclictest	646171	-21	apt-get	08:57:33	0
539508	99	39	2,35	cyclictest	0	-21	swapper/0	12:37:52	0
539508	99	39	19,2	cyclictest	0	-21	swapper/0	11:25:20	0
539508	99	39	18,3	cyclictest	0	-21	swapper/0	09:32:36	0
539508	99	39	15,8	cyclictest	575155	-21	ntpq	07:42:45	0
539508	99	39	0,35	cyclictest	1	-21	systemd	09:12:20	0
539513	99	38	29,7	cyclictest	275	-21	systemd-journal	07:33:50	1
539508	99	38	31,5	cyclictest	275	-21	systemd-journal	08:26:26	0
539508	99	38	21,6	cyclictest	700396	-21	latency_hist	09:50:01	0
539517	99	37	23,12	cyclictest	854249	-21	unixbench_multi	12:22:53	2
539517	99	37	22,13	cyclictest	834188	-21	unixbench_multi	12:02:52	2
539517	99	37	22,13	cyclictest	794635	-21	unixbench_singl	11:22:53	2
539513	99	37	33,3	cyclictest	720402	-21	kworker/u8:3+events_unbound	10:20:00	1
539513	99	37	32,4	cyclictest	576161	-21	kworker/u8:3+events_unbound	07:47:55	1
539513	99	37	32,3	cyclictest	844378	-21	kworker/u8:0+flush-8:0	12:17:40	1
539513	99	37	31,5	cyclictest	3930081	-21	kworker/u8:1+flush-8:0	08:12:51	1
539517	99	36	21,13	cyclictest	705133	-21	unixbench_singl	09:52:52	2
539517	99	36	21,13	cyclictest	595742	-21	unixbench_multi	08:02:53	2
539513	99	36	30,4	cyclictest	685336	-21	kworker/u8:0+flush-8:0	10:02:46	1
539508	99	36	19,2	cyclictest	790623	-21	cpuspeed_turbos	11:22:35	0
539508	99	36	18,3	cyclictest	833931	-21	mailstats	12:02:50	0
539508	99	36	17,17	cyclictest	736411	-21	kthreadcore	10:27:38	0
539508	99	36	15,3	cyclictest	0	-21	swapper/0	10:57:37	0
539513	99	35	31,3	cyclictest	590866	-21	kworker/u8:2+events_unbound	09:22:40	1
539513	99	35	29,4	cyclictest	740252	-21	kworker/u8:1+events_unbound	11:02:42	1
539513	99	35	29,4	cyclictest	685336	-21	kworker/u8:0+flush-8:0	11:12:49	1
539513	99	35	28,5	cyclictest	621193	-21	kworker/u8:3+flush-8:0	08:47:35	1
539508	99	35	23,1	cyclictest	0	-21	swapper/0	12:32:51	0
539517	99	34	23,8	cyclictest	275	-21	systemd-journal	12:05:20	2
539513	99	34	28,4	cyclictest	784945	-21	kworker/u8:3+events_unbound	11:22:49	1
539508	99	34	25,7	cyclictest	596942	-21	diskstats	08:07:35	0
539513	99	33	28,4	cyclictest	844378	-21	kworker/u8:0+events_unbound	12:30:00	1
539513	99	33	27,4	cyclictest	685336	-21	kworker/u8:0+flush-8:0	10:57:43	1
539513	99	33	27,4	cyclictest	576161	-21	kworker/u8:3+flush-8:0	07:52:52	1
539513	99	33	27,4	cyclictest	3930081	-21	kworker/u8:1+flush-8:0	08:17:41	1
539513	99	33	27,4	cyclictest	3930081	-21	kworker/u8:1+flush-8:0	08:17:41	1
539508	99	33	17,4	cyclictest	0	-21	swapper/0	09:27:47	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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