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 Fri Sep 04, 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
4101386	99	73	63,7	cyclictest	275	-21	systemd-journal	19:40:00	0
4101386	99	64	55,6	cyclictest	4187877	-21	latency_hist	20:35:01	0
4101388	99	58	53,4	cyclictest	68128	-21	kworker/u8:0+flush-8:0	22:22:45	1
4101388	99	57	51,4	cyclictest	207675	-21	kworker/u8:0+events_unbound	00:25:00	1
4101388	99	57	51,4	cyclictest	207675	-21	kworker/u8:0+events_unbound	00:25:00	1
4101388	99	57	50,5	cyclictest	4113228	-21	kworker/u8:2+events_unbound	21:52:42	1
4101391	99	56	48,6	cyclictest	237773	-21	cp	00:40:00	2
4101388	99	55	47,6	cyclictest	4153394	-21	/usr/sbin/munin	20:02:45	1
4101386	99	55	47,6	cyclictest	88229	-21	kworker/u8:3+flush-8:0	23:19:59	0
4101386	99	55	47,6	cyclictest	4113228	-21	kworker/u8:2+flush-8:0	20:17:30	0
4101388	99	52	47,4	cyclictest	68128	-21	kworker/u8:0+events_unbound	22:17:32	1
4101388	99	52	42,8	cyclictest	275	-21	systemd-journal	00:20:00	1
4101391	99	51	40,8	cyclictest	103482	-21	cp	22:25:01	2
4101388	99	50	45,4	cyclictest	197009	-21	kworker/u8:1+events_unbound	00:07:42	1
4101388	99	50	39,9	cyclictest	275	-21	systemd-journal	21:35:01	1
4101388	99	49	42,5	cyclictest	4157924	-21	kworker/u8:3+events_unbound	21:42:38	1
4101388	99	49	42,5	cyclictest	128260	-21	kworker/u8:2+flush-8:0	23:32:40	1
4101391	99	48	36,9	cyclictest	38858	-21	awk	21:20:00	2
4101388	99	47	43,3	cyclictest	4118619	-21	kworker/u8:0+events_unbound	20:32:37	1
4101388	99	47	41,4	cyclictest	4113228	-21	kworker/u8:2+events_unbound	20:27:42	1
4101386	99	47	40,5	cyclictest	203196	-21	/usr/sbin/munin	00:07:43	0
4108875	2	46	0,1	sleep1	4108876	-21	/usr/sbin/munin	19:17:28	1
4101388	99	46	42,3	cyclictest	122902	-21	kworker/u8:1+events_unbound	22:47:30	1
4101388	99	46	40,5	cyclictest	68128	-21	kworker/u8:0+flush-8:0	22:07:45	1
4101388	99	46	40,5	cyclictest	3964904	-21	kworker/u8:1+events_unbound	19:12:41	1
4101388	99	46	40,5	cyclictest	217422	-21	kworker/u8:3+flush-8:0	00:37:47	1
4101388	99	46	40,4	cyclictest	4157924	-21	kworker/u8:3+events_unbound	21:12:40	1
4101386	99	46	42,3	cyclictest	68128	-21	kworker/u8:0+flush-8:0	22:42:31	0
4101386	99	46	39,5	cyclictest	182646	-21	latency_hist	23:45:00	0
4101386	99	46	36,8	cyclictest	236947	-21	ntpq	00:37:43	0
4101388	99	45	40,4	cyclictest	88229	-21	kworker/u8:3+events_unbound	23:37:47	1
4101388	99	45	38,5	cyclictest	197009	-21	kworker/u8:1+flush-8:0	00:02:47	1
4101388	99	45	36,7	cyclictest	142320	-21	ntpq	23:02:38	1
4101386	99	45	37,6	cyclictest	67679	-21	ntpq	21:47:40	0
4101386	99	45	36,7	cyclictest	108891	-21	diskstats	22:32:30	0
82288	2	44	0,4	sleep1	0	-21	swapper/1	22:02:37	1
4101388	99	44	38,5	cyclictest	4113228	-21	kworker/u8:2+events_unbound	21:27:41	1
4101388	99	44	38,4	cyclictest	88229	-21	kworker/u8:3+flush-8:0	23:12:29	1
4101386	99	44	38,4	cyclictest	4113228	-21	kworker/u8:2+flush-8:0	20:27:31	0
4101388	99	43	39,3	cyclictest	8753	-21	kworker/u8:1+flush-8:0	21:57:32	1
4101386	99	43	34,7	cyclictest	183569	-21	diskstats	23:47:30	0
4101388	99	42	37,4	cyclictest	128260	-21	kworker/u8:2+flush-8:0	23:57:44	1
4101388	99	42	36,4	cyclictest	4113228	-21	kworker/u8:2+flush-8:0	19:37:35	1
4101388	99	42	36,4	cyclictest	207675	-21	kworker/u8:0+flush-8:0	00:32:41	1
4101388	99	42	36,4	cyclictest	207675	-21	kworker/u8:0+flush-8:0	00:32:41	1
4101386	99	42	33,6	cyclictest	63551	-21	latency_hist	21:45:01	0
4101391	99	41	31,7	cyclictest	4162875	-21	awk	20:10:00	2
4101388	99	41	37,3	cyclictest	168037	-21	kworker/u8:0+events_unbound	23:47:35	1
4101388	99	41	36,4	cyclictest	2762707	-21	kworker/u8:4+flush-8:0	19:22:29	1
4101388	99	41	35,4	cyclictest	4113228	-21	kworker/u8:2+flush-8:0	21:22:40	1
4101388	99	41	32,7	cyclictest	13672	-21	latency_hist	20:55:00	1
4101391	99	40	28,9	cyclictest	4188554	-21	diskstats	20:37:29	2
4101388	99	40	36,3	cyclictest	207675	-21	kworker/u8:0+events_unbound	00:30:00	1
4101388	99	40	35,4	cyclictest	153005	-21	kworker/u8:1+flush-8:0	23:17:39	1
4101388	99	40	35,3	cyclictest	4118619	-21	kworker/u8:0+flush-8:0	19:52:35	1
4101391	99	39	30,7	cyclictest	23563	-21	apt-get	21:05:01	2
4101388	99	39	32,5	cyclictest	4123119	-21	grep	19:27:47	1
4101386	99	39	33,5	cyclictest	128260	-21	kworker/u8:2+flush-8:0	23:15:00	0
4101386	99	39	33,4	cyclictest	207675	-21	kworker/u8:0+flush-8:0	00:35:00	0
4101386	99	39	33,4	cyclictest	207675	-21	kworker/u8:0+flush-8:0	00:35:00	0
4101388	99	38	33,4	cyclictest	68128	-21	kworker/u8:0+flush-8:0	22:27:41	1
4101388	99	38	33,3	cyclictest	4157924	-21	kworker/u8:3+flush-8:0	21:47:43	1
4101388	99	38	33,3	cyclictest	4118619	-21	kworker/u8:0+events_unbound	20:07:33	1
4101388	99	38	33,3	cyclictest	197009	-21	kworker/u8:1+flush-8:0	00:12:35	1
4101388	99	38	31,5	cyclictest	4157924	-21	kworker/u8:3+flush-8:0	21:17:48	1
4101386	99	38	31,5	cyclictest	138158	-21	latency_hist	23:00:01	0
4101388	99	37	32,3	cyclictest	128260	-21	kworker/u8:2+flush-8:0	22:57:42	1
4101388	99	37	30,5	cyclictest	88229	-21	kworker/u8:3+flush-8:0	22:42:41	1
4101388	99	37	29,6	cyclictest	132990	-21	apt-get	22:55:00	1
4101388	99	37	29,4	cyclictest	108568	-21	kworker/u8:2+flush-8:0	22:37:43	1
4101388	99	37	27,8	cyclictest	275	-21	systemd-journal	23:55:00	1
4101386	99	37	27,8	cyclictest	275	-21	systemd-journal	20:40:00	0
4101386	99	37	27,7	cyclictest	128030	-21	latency_hist	22:50:01	0
4101388	99	36	32,3	cyclictest	4157924	-21	kworker/u8:3+events_unbound	20:17:43	1
4101388	99	36	31,4	cyclictest	4118619	-21	kworker/u8:0+flush-8:0	19:57:40	1
4101388	99	36	31,3	cyclictest	4113228	-21	kworker/u8:2+events_unbound	20:37:32	1
4101388	99	36	29,5	cyclictest	275	-21	systemd-journal	23:06:55	1
4101388	99	36	28,6	cyclictest	24203	-21	/usr/sbin/munin	21:07:45	1
4101388	99	35	29,4	cyclictest	4113228	-21	kworker/u8:2+flush-8:0	20:57:35	1
4101388	99	35	28,6	cyclictest	108568	-21	kworker/u8:2+flush-8:0	22:32:34	1
4101388	99	35	28,5	cyclictest	275	-21	systemd-journal	20:21:55	1
4101388	99	35	26,7	cyclictest	167083	-21	ntpq	23:27:41	1
4101386	99	35	31,2	cyclictest	33756	-21	base64	21:15:01	0
4101386	99	35	27,6	cyclictest	4105521	-21	ntpq	19:12:39	0
4101386	99	35	27,6	cyclictest	275	-21	systemd-journal	19:16:56	0
4101386	99	35	0,33	cyclictest	1	-21	systemd	21:59:55	0
4101391	99	34	26,6	cyclictest	133252	-21	cat	22:55:01	2
4101391	99	34	19,9	cyclictest	88649	-21	apt-get	22:12:28	2
4101391	99	34	16,11	cyclictest	4193266	-21	taskset	20:42:28	2
4101391	99	34	16,11	cyclictest	4193266	-21	taskset	20:42:28	2
4101388	99	34	30,3	cyclictest	4118619	-21	kworker/u8:0+events_unbound	19:32:31	1
4101388	99	34	28,5	cyclictest	4113228	-21	kworker/u8:2+events_unbound	21:37:45	1
4101388	99	34	28,3	cyclictest	4113228	-21	kworker/u8:2+events_unbound	22:15:00	1
4101386	99	34	27,5	cyclictest	3964904	-21	kworker/u8:1+flush-8:0	19:42:29	0
4101391	99	33	9,12	cyclictest	192110	-21	ntpq	23:52:41	2
4101391	99	33	17,10	cyclictest	4148443	-21	apt-get	19:57:28	2
4101388	99	33	29,3	cyclictest	4157924	-21	kworker/u8:3+events_unbound	20:47:36	1
4101388	99	33	29,3	cyclictest	4157924	-21	kworker/u8:3+events_unbound	20:47:36	1
4101388	99	33	28,4	cyclictest	4157924	-21	kworker/u8:3+flush-8:0	20:42:42	1
4101388	99	33	28,4	cyclictest	4157924	-21	kworker/u8:3+flush-8:0	20:42:42	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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