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 Jun 26, 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
4082459	2	193	0,2	sleep3	48	1	ktimers/3	21:30:25	3
4027004	2	63	0,19	sleep2	0	-21	swapper/2	20:35:17	2
3940311	99	63	44,17	cyclictest	4075251	-21	ntpq	21:20:29	0
3940313	99	61	51,6	cyclictest	1704890	-21	systemd-journal	22:45:17	1
3940313	99	59	53,4	cyclictest	4036614	-21	kworker/u8:1+flush-8:0	20:55:32	1
3940313	99	59	53,4	cyclictest	4036614	-21	kworker/u8:1+flush-8:0	20:55:31	1
3940313	99	58	52,4	cyclictest	4042096	-21	kworker/u8:0+flush-8:0	22:35:35	1
3940313	99	57	45,8	cyclictest	4080792	-21	kworker/u8:1+flush-8:0	21:30:29	1
3940311	99	55	45,7	cyclictest	4032156	-21	diskstats	20:40:20	0
3940311	99	55	35,8	cyclictest	1704890	-21	systemd-journal	19:20:00	0
3940313	99	54	47,5	cyclictest	11380	-21	kworker/u8:3+events_unbound	23:55:17	1
3940313	99	54	45,6	cyclictest	1704890	-21	systemd-journal	19:25:16	1
3940313	99	52	44,6	cyclictest	3947347	-21	kworker/u8:1+flush-8:0	19:30:35	1
3940313	99	52	42,7	cyclictest	1704890	-21	systemd-journal	23:25:00	1
3940311	99	52	31,6	cyclictest	1704890	-21	systemd-journal	22:15:01	0
3940313	99	51	45,4	cyclictest	3989849	-21	kworker/u8:2+events_unbound	20:45:17	1
3940313	99	51	44,5	cyclictest	4075352	-21	kworker/u8:3+events_unbound	21:20:36	1
3940311	99	51	28,7	cyclictest	4086121	-21	latency_hist	21:35:02	0
3940313	99	50	45,4	cyclictest	3898260	-21	kworker/u8:3+flush-8:0	20:30:31	1
3940317	99	49	44,3	cyclictest	4042096	-21	kworker/u8:0+flush-8:0	22:45:29	2
3940313	99	48	39,7	cyclictest	4154963	-21	ntpq	22:40:29	1
3940317	99	47	41,4	cyclictest	3989849	-21	kworker/u8:2+flush-8:0	20:00:20	2
3940313	99	47	39,6	cyclictest	71190	-21	latency_hist	00:35:02	1
3989956	2	46	0,4	sleep3	75	-21	kworker/3:1-mm_percpu_wq	19:55:26	3
3940313	99	46	40,5	cyclictest	4140692	-21	kworker/u8:1+events_unbound	23:50:33	1
3940313	99	46	40,5	cyclictest	4140692	-21	kworker/u8:1+events_unbound	23:50:33	1
3940313	99	46	40,5	cyclictest	3898260	-21	kworker/u8:3+events_unbound	20:40:28	1
3940313	99	46	39,4	cyclictest	4042096	-21	kworker/u8:0+events_unbound	21:00:33	1
3940313	99	46	36,7	cyclictest	4135213	-21	ntpq	22:20:31	1
3940313	99	46	35,7	cyclictest	1704890	-21	systemd-journal	23:10:01	1
3940311	99	46	37,6	cyclictest	3981932	-21	apt-get	19:50:00	0
3940317	99	45	39,4	cyclictest	4140692	-21	kworker/u8:1+flush-8:0	23:25:35	2
3940313	99	45	39,4	cyclictest	4036614	-21	kworker/u8:1+events_unbound	21:05:18	1
3940313	99	45	39,4	cyclictest	36757	-21	kworker/u8:1+events_unbound	00:00:34	1
3940313	99	45	39,4	cyclictest	36757	-21	kworker/u8:1+events_unbound	00:00:34	1
3940313	99	45	37,6	cyclictest	4140692	-21	kworker/u8:1+events_unbound	23:30:35	1
3940311	99	45	36,6	cyclictest	46470	-21	latency_hist	00:10:00	0
3940311	99	45	36,6	cyclictest	3997042	-21	latency_hist	20:05:01	0
3940311	99	45	1,42	cyclictest	1	-21	systemd	21:05:00	0
3940313	99	44	37,5	cyclictest	4042096	-21	kworker/u8:0+events_unbound	21:35:30	1
3940313	99	44	32,9	cyclictest	3996128	-21	ntpq	20:00:28	1
3955932	2	43	0,6	sleep2	0	-21	swapper/2	19:20:26	2
3940317	99	43	33,7	cyclictest	1704890	-21	systemd-journal	20:25:17	2
3940313	99	43	34,7	cyclictest	1704890	-21	systemd-journal	22:05:00	1
3940313	99	43	31,9	cyclictest	1704890	-21	systemd-journal	23:45:00	1
3940311	99	43	34,6	cyclictest	4031626	-21	latency_hist	20:40:01	0
3940313	99	42	38,3	cyclictest	3989849	-21	kworker/u8:2+flush-8:0	20:20:32	1
3940313	99	42	35,5	cyclictest	4080792	-21	kworker/u8:1+flush-8:0	22:05:31	1
3940313	99	41	35,4	cyclictest	4140692	-21	kworker/u8:1+flush-8:0	22:30:32	1
3940311	99	41	35,4	cyclictest	4184722	-21	kworker/u8:0+flush-8:0	23:10:36	0
3940317	99	40	34,4	cyclictest	4111284	-21	kworker/u8:2+flush-8:0	22:50:34	2
3940313	99	40	35,4	cyclictest	3947347	-21	kworker/u8:1+events_unbound	19:40:31	1
3940313	99	40	35,3	cyclictest	4123532	-21	kworker/u8:3+events_unbound	22:15:28	1
3940313	99	40	34,4	cyclictest	4180905	-21	apt-get	23:10:15	1
3940313	99	40	33,5	cyclictest	3989849	-21	kworker/u8:2+flush-8:0	19:55:31	1
3940313	99	40	31,7	cyclictest	3947362	-21	/usr/sbin/munin	19:15:33	1
3940311	99	40	31,6	cyclictest	1704890	-21	systemd-journal	21:15:00	0
3936890	2	40	4,7	sleep0	0	-21	swapper/0	19:05:22	0
3940317	99	39	34,3	cyclictest	4080792	-21	kworker/u8:1+events_unbound	22:10:24	2
3940317	99	39	33,4	cyclictest	11380	-21	kworker/u8:3+flush-8:0	00:10:30	2
3940313	99	39	33,4	cyclictest	4091313	-21	apt-get	21:40:17	1
3940313	99	38	32,5	cyclictest	4042096	-21	kworker/u8:0+flush-8:0	22:25:21	1
3940313	99	37	33,3	cyclictest	11380	-21	kworker/u8:3+events_unbound	00:05:36	1
3940313	99	37	32,4	cyclictest	3947347	-21	kworker/u8:1+events_unbound	19:50:32	1
3940313	99	37	31,4	cyclictest	3089799	-21	kworker/u8:2+events_unbound	19:15:00	1
3940313	99	37	29,6	cyclictest	36757	-21	kworker/u8:1+flush-8:0	00:35:32	1
3940311	99	37	28,6	cyclictest	3972053	-21	latency_hist	19:40:01	0
3940313	99	36	32,3	cyclictest	3930077	-21	kworker/u8:0+events_unbound	20:05:34	1
3940313	99	36	30,4	cyclictest	3947347	-21	kworker/u8:1+flush-8:0	19:35:36	1
3940313	99	36	29,5	cyclictest	3947347	-21	kworker/u8:1+flush-8:0	19:20:30	1
3940313	99	36	28,6	cyclictest	6790	-21	latency_hist	23:30:00	1
3940313	99	36	27,6	cyclictest	3989849	-21	kworker/u8:2+flush-8:0	21:10:30	1
3940317	99	35	31,3	cyclictest	11380	-21	kworker/u8:3+flush-8:0	00:20:30	2
3940313	99	35	31,3	cyclictest	3989849	-21	kworker/u8:2+flush-8:0	21:25:31	1
3940313	99	35	31,3	cyclictest	3989849	-21	kworker/u8:2+events_unbound	20:35:19	1
3940313	99	35	28,5	cyclictest	3989849	-21	kworker/u8:2+flush-8:0	21:15:36	1
3940313	99	35	28,5	cyclictest	21904	-21	apt-get	23:45:14	1
3940313	99	35	28,4	cyclictest	4111284	-21	kworker/u8:2+flush-8:0	00:25:20	1
3940313	99	35	27,6	cyclictest	4020818	-21	ntpq	20:25:27	1
3940313	99	35	27,6	cyclictest	3977242	-21	/usr/sbin/munin	19:45:25	1
3940311	99	35	26,7	cyclictest	4190602	-21	latency_hist	23:20:01	0
3940311	99	35	26,6	cyclictest	16684	-21	latency_hist	23:40:01	0
3940313	99	34	29,4	cyclictest	3989849	-21	kworker/u8:2+events_unbound	20:50:19	1
3940313	99	34	29,4	cyclictest	3989849	-21	kworker/u8:2+events_unbound	20:50:18	1
3940313	99	34	27,5	cyclictest	36757	-21	kworker/u8:1+flush-8:0	00:15:22	1
3940311	99	34	27,5	cyclictest	4106370	-21	apt-get	21:55:16	0
3940311	99	34	25,7	cyclictest	4056881	-21	diskstats	21:05:19	0
3940311	99	34	24,7	cyclictest	61318	-21	latency_hist	00:25:01	0
3940311	99	34	10,22	cyclictest	4081177	-21	kworker/0:2+events	22:00:34	0
3940317	99	33	29,3	cyclictest	3089799	-21	kworker/u8:2+events_unbound	19:15:02	2
3940317	99	33	25,6	cyclictest	31614	-21	cat	23:55:01	2
3940317	99	33	25,6	cyclictest	31614	-21	cat	23:55:01	2
3940313	99	33	28,3	cyclictest	3989849	-21	kworker/u8:2+events_unbound	20:15:19	1
3940313	99	33	27,5	cyclictest	3898260	-21	kworker/u8:3+flush-8:0	20:10:30	1
3940313	99	33	27,4	cyclictest	4080792	-21	kworker/u8:1+flush-8:0	21:45:23	1
3940311	99	33	9,23	cyclictest	4081177	-21	kworker/0:2+events	21:35:19	0
3940311	99	33	26,5	cyclictest	3947347	-21	kworker/u8:1+flush-8:0	19:40:39	0
3940317	99	32	27,3	cyclictest	4111284	-21	kworker/u8:2+flush-8:0	23:35:16	2
3940317	99	32	22,8	cyclictest	4115990	-21	turbostat.cron	22:05:01	2
3940313	99	32	28,3	cyclictest	11380	-21	kworker/u8:3+flush-8:0	23:35:26	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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