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 Tue Jun 16, 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
4005963	2	88	0,6	chrt	0	-21	swapper/2	07:45:34	2
3965566	99	74	65,7	cyclictest	4190655	-21	kworker/u8:0+flush-8:0	11:15:43	0
4040491	2	72	0,5	chrt	0	-21	swapper/2	08:20:34	2
3965566	99	66	45,8	cyclictest	4125436	-21	ntpq	09:45:39	0
3965574	99	64	54,8	cyclictest	4161112	-21	cp	10:25:00	2
3965574	99	62	56,4	cyclictest	4190655	-21	kworker/u8:0+flush-8:0	11:40:44	2
3965574	99	61	55,4	cyclictest	31536	-21	apt-get	11:30:00	2
3965571	99	60	54,4	cyclictest	4106255	-21	kworker/u8:3+events_unbound	10:05:42	1
3965571	99	59	48,6	cyclictest	1704890	-21	systemd-journal	09:45:42	1
3965571	99	58	51,4	cyclictest	56754	-21	kworker/u8:1+events_unbound	12:35:42	1
3965571	99	58	51,4	cyclictest	56754	-21	kworker/u8:1+events_unbound	12:35:42	1
3965571	99	58	50,6	cyclictest	4106255	-21	kworker/u8:3+flush-8:0	09:30:36	1
3965571	99	58	47,8	cyclictest	4150194	-21	ntpq	10:10:38	1
3965571	99	58	46,9	cyclictest	4115580	-21	ntpq	09:35:38	1
3965574	99	57	52,4	cyclictest	4076485	-21	kworker/u8:1+events_unbound	11:00:43	2
3965571	99	56	50,4	cyclictest	2596405	-21	kworker/u8:2+events_unbound	08:40:00	1
3965571	99	56	49,4	cyclictest	4106255	-21	kworker/u8:3+flush-8:0	10:00:31	1
3965571	99	56	49,4	cyclictest	4106255	-21	kworker/u8:3+flush-8:0	10:00:31	1
3965571	99	56	48,6	cyclictest	4042542	-21	kworker/u8:3+events_unbound	08:45:43	1
82803	2	55	0,2	chrt	75	-21	kworker/3:1+events	12:20:33	3
3965571	99	55	48,5	cyclictest	2596405	-21	kworker/u8:2+flush-8:0	07:25:44	1
3965571	99	55	47,6	cyclictest	4057381	-21	/usr/sbin/munin	08:40:44	1
3965574	99	53	49,3	cyclictest	3908046	-21	kworker/u8:0+flush-8:0	07:40:43	2
3965571	99	53	49,3	cyclictest	4042542	-21	kworker/u8:3+flush-8:0	08:25:41	1
3965571	99	53	44,6	cyclictest	4156081	-21	latency_hist	10:20:02	1
4167338	2	52	0,1	sleep1	4167344	-21	sed	10:30:32	1
3965571	99	52	44,6	cyclictest	4077160	-21	/usr/sbin/munin	09:00:39	1
3965571	99	52	44,6	cyclictest	2596405	-21	kworker/u8:2+flush-8:0	08:30:28	1
3965571	99	51	39,9	cyclictest	1704890	-21	systemd-journal	11:50:41	1
3965574	99	50	44,4	cyclictest	4042542	-21	kworker/u8:3+flush-8:0	08:55:39	2
3965571	99	50	44,4	cyclictest	3908046	-21	kworker/u8:0+flush-8:0	08:10:30	1
3965571	99	50	41,6	cyclictest	3976403	-21	ntpq	07:15:37	1
3965571	99	49	16,31	cyclictest	1	-21	systemd	09:55:41	1
3965571	99	49	16,31	cyclictest	1	-21	systemd	09:55:41	1
3965566	99	49	40,6	cyclictest	4026992	-21	latency_hist	08:10:01	0
3965566	99	48	38,7	cyclictest	66399	-21	latency_hist	12:05:01	0
3965566	99	47	39,6	cyclictest	56754	-21	kworker/u8:1+flush-8:0	12:05:26	0
3965566	99	47	37,8	cyclictest	2596405	-21	kworker/u8:2+flush-8:0	08:35:31	0
3965566	99	47	37,7	cyclictest	4042542	-21	kworker/u8:3+flush-8:0	08:45:31	0
3965571	99	46	40,4	cyclictest	4091970	-21	kworker/u8:2+flush-8:0	09:15:31	1
3965571	99	46	35,8	cyclictest	10889	-21	ntpq	11:05:37	1
3965566	99	46	36,8	cyclictest	4090878	-21	ntpq	09:10:40	0
3965571	99	45	39,4	cyclictest	3908046	-21	kworker/u8:0+flush-8:0	07:20:36	1
3965574	99	44	39,4	cyclictest	4042542	-21	kworker/u8:3+flush-8:0	08:40:45	2
3965574	99	44	38,5	cyclictest	4091970	-21	kworker/u8:2+flush-8:0	09:15:33	2
3965571	99	44	36,5	cyclictest	81475	-21	latency_hist	12:20:00	1
3965571	99	44	34,8	cyclictest	4156627	-21	diskstats	10:20:26	1
3965566	99	44	35,7	cyclictest	4072482	-21	diskstats	08:55:29	0
3965566	99	44	34,7	cyclictest	4047262	-21	latency_hist	08:30:01	0
3965574	99	43	39,3	cyclictest	56754	-21	kworker/u8:1+events_unbound	12:10:40	2
3965574	99	43	34,7	cyclictest	4111526	-21	turbostat.cron	09:34:59	2
3965574	99	43	34,6	cyclictest	1704890	-21	systemd-journal	12:35:00	2
3965571	99	43	37,4	cyclictest	4012450	-21	apt-get	07:55:25	1
3965571	99	43	36,5	cyclictest	3908046	-21	kworker/u8:0+flush-8:0	08:20:28	1
3965571	99	43	36,3	cyclictest	3908046	-21	kworker/u8:0+flush-8:0	07:35:26	1
3965571	99	43	33,7	cyclictest	4076897	-21	latency_hist	09:00:01	1
3965571	99	43	31,9	cyclictest	3969560	-21	ntpq	07:10:36	1
3965571	99	42	36,4	cyclictest	4042542	-21	kworker/u8:3+flush-8:0	08:50:41	1
3965571	99	42	35,4	cyclictest	12076	-21	apt-get	11:10:22	1
3965571	99	42	32,7	cyclictest	4186235	-21	/usr/sbin/munin	10:50:39	1
3965574	99	41	37,3	cyclictest	4091970	-21	kworker/u8:2+flush-8:0	10:40:26	2
3965574	99	41	30,9	cyclictest	4057122	-21	awk	08:40:00	2
3965571	99	41	35,4	cyclictest	4106255	-21	kworker/u8:3+events_unbound	09:40:38	1
3965571	99	41	33,5	cyclictest	56754	-21	kworker/u8:1+events_unbound	12:25:27	1
3965571	99	41	25,10	cyclictest	1704890	-21	systemd-journal	09:21:41	1
3965566	99	41	31,8	cyclictest	3997073	-21	apt-get	07:40:01	0
3965566	99	41	30,9	cyclictest	4037094	-21	apt-get	08:20:00	0
3965566	99	41	29,9	cyclictest	1704890	-21	systemd-journal	11:40:00	0
3965571	99	40	33,5	cyclictest	46126	-21	kworker/u8:2+events_unbound	12:20:28	1
3965571	99	40	31,6	cyclictest	60586	-21	ntpq	11:55:40	1
3965571	99	40	31,2	cyclictest	16	1	rcu_preempt	09:14:59	1
3965566	99	40	36,3	cyclictest	4190655	-21	kworker/u8:0+events_unbound	11:20:34	0
3965571	99	39	30,7	cyclictest	1704890	-21	systemd-journal	10:42:42	1
3965571	99	39	29,7	cyclictest	4085897	-21	ntpq	09:05:38	1
3965566	99	39	29,8	cyclictest	4180135	-21	ntpq	10:40:36	0
3965566	99	39	29,8	cyclictest	1704890	-21	systemd-journal	10:20:00	0
3965571	99	38	33,4	cyclictest	3908046	-21	kworker/u8:0+flush-8:0	08:05:29	1
3965571	99	38	32,4	cyclictest	4091970	-21	kworker/u8:2+events_unbound	10:25:42	1
3965571	99	38	32,4	cyclictest	2596405	-21	kworker/u8:2+flush-8:0	07:30:31	1
3965566	99	38	33,4	cyclictest	2596405	-21	kworker/u8:2+events_unbound	09:05:42	0
3961193	2	38	4,10	sleep2	0	-21	swapper/2	07:05:31	2
3961193	2	38	4,10	sleep2	0	-21	swapper/2	07:05:31	2
3965574	99	37	32,3	cyclictest	46126	-21	kworker/u8:2+flush-8:0	12:15:40	2
3965571	99	37	31,4	cyclictest	4076485	-21	kworker/u8:1+flush-8:0	11:35:26	1
3965566	99	37	32,3	cyclictest	4091970	-21	kworker/u8:2+flush-8:0	10:25:32	0
3965566	99	37	31,4	cyclictest	4091970	-21	kworker/u8:2+events_unbound	09:20:40	0
3965566	99	37	27,8	cyclictest	1704890	-21	systemd-journal	12:30:41	0
3965571	99	36	30,4	cyclictest	46126	-21	kworker/u8:2+events_unbound	12:30:33	1
3965571	99	36	29,4	cyclictest	4161477	-21	kworker/u8:0+flush-8:0	10:35:37	1
3965571	99	36	27,6	cyclictest	4106255	-21	kworker/u8:3+events_unbound	09:50:30	1
3965566	99	36	30,5	cyclictest	4091970	-21	kworker/u8:2+events_unbound	09:15:34	0
3965566	99	36	30,5	cyclictest	3908046	-21	kworker/u8:0+flush-8:0	07:15:29	0
3965566	99	36	26,8	cyclictest	4171389	-21	kworker/u8:3+flush-8:0	11:30:37	0
3965566	99	36	26,7	cyclictest	4135481	-21	ntpq	09:55:39	0
3965566	99	36	26,7	cyclictest	4135481	-21	ntpq	09:55:38	0
3965571	99	35	30,4	cyclictest	2596405	-21	kworker/u8:2+events_unbound	07:45:37	1
3965571	99	35	29,4	cyclictest	4181352	-21	apt-get	10:45:25	1
3965571	99	35	27,6	cyclictest	4076485	-21	kworker/u8:1+events_unbound	10:55:43	1
3965566	99	35	30,3	cyclictest	4161477	-21	kworker/u8:0+events_unbound	10:35:42	0
3965566	99	35	25,7	cyclictest	76543	-21	latency_hist	12:15:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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