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 Fri Jun 12, 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
878116	2	390	0,2	sleep3	48	1	ktimers/3	12:00:00	3
698764	2	175	0,1	sleep3	75	-21	kworker/3:1-events	08:55:49	3
602758	2	171	0,6	sleep3	0	-21	swapper/3	07:20:38	3
588531	99	75	68,5	cyclictest	758968	-21	kworker/u8:3+flush-8:0	10:05:46	1
588525	99	69	59,7	cyclictest	918181	-21	latency_hist	12:40:00	0
588535	99	60	49,8	cyclictest	913403	-21	cat	12:35:01	2
588531	99	60	51,7	cyclictest	1704890	-21	systemd-journal	10:53:09	1
588531	99	59	47,9	cyclictest	723225	-21	ntpq	09:20:42	1
588531	99	58	53,3	cyclictest	620373	-21	kworker/u8:2+flush-8:0	07:55:31	1
588531	99	58	53,3	cyclictest	620373	-21	kworker/u8:2+flush-8:0	07:55:30	1
588531	99	56	51,4	cyclictest	723261	-21	kworker/u8:2+events_unbound	10:15:41	1
588531	99	56	49,5	cyclictest	567992	-21	kworker/u8:3+flush-8:0	08:20:42	1
588531	99	54	47,5	cyclictest	669507	-21	kworker/u8:0+flush-8:0	09:10:30	1
588531	99	54	47,4	cyclictest	758968	-21	kworker/u8:3+events_unbound	11:50:29	1
588531	99	54	43,8	cyclictest	892007	-21	ntpq	12:10:40	1
588525	99	54	44,7	cyclictest	592575	-21	ntpq	07:10:43	0
588531	99	50	44,4	cyclictest	567992	-21	kworker/u8:3+flush-8:0	08:35:42	1
588531	99	49	42,5	cyclictest	614902	-21	kworker/u8:1+flush-8:0	08:15:34	1
588531	99	49	38,9	cyclictest	629177	-21	ntpq	07:45:44	1
588535	99	48	37,8	cyclictest	679467	-21	cat	08:40:01	2
588531	99	48	42,4	cyclictest	614902	-21	kworker/u8:1+events_unbound	07:35:41	1
588531	99	48	41,5	cyclictest	567992	-21	kworker/u8:3+flush-8:0	08:30:32	1
588531	99	47	41,4	cyclictest	908415	-21	kworker/u8:2+flush-8:0	12:35:43	1
588531	99	47	41,4	cyclictest	620373	-21	kworker/u8:2+events_unbound	08:00:45	1
588531	99	47	40,4	cyclictest	614902	-21	kworker/u8:1+events_unbound	08:10:44	1
588531	99	47	39,5	cyclictest	828698	-21	latency_hist	11:10:00	1
588531	99	47	37,8	cyclictest	1704890	-21	systemd-journal	10:00:01	1
588535	99	46	40,4	cyclictest	588395	-21	kworker/u8:1+flush-8:0	07:10:31	2
588531	99	46	41,3	cyclictest	813055	-21	kworker/u8:1+events_unbound	12:00:36	1
588531	99	46	37,7	cyclictest	733327	-21	ntpq	09:30:40	1
588531	99	46	36,8	cyclictest	743310	-21	ntpq	09:40:42	1
588531	99	46	36,7	cyclictest	896950	-21	ntpq	12:15:39	1
588531	99	46	35,8	cyclictest	847581	-21	ntpq	11:25:42	1
588531	99	45	39,4	cyclictest	723261	-21	kworker/u8:2+flush-8:0	10:00:45	1
588531	99	45	38,5	cyclictest	567992	-21	kworker/u8:3+events_unbound	08:40:46	1
588525	99	45	35,8	cyclictest	734485	-21	/usr/sbin/munin	09:35:39	0
588531	99	44	34,8	cyclictest	693577	-21	ntpq	08:50:45	1
588531	99	44	32,9	cyclictest	1704890	-21	systemd-journal	09:45:41	1
588531	99	44	32,9	cyclictest	1704890	-21	systemd-journal	09:45:40	1
588525	99	44	34,8	cyclictest	1704890	-21	systemd-journal	11:00:00	0
588535	99	43	37,4	cyclictest	567992	-21	kworker/u8:3+flush-8:0	08:25:31	2
588535	99	43	34,7	cyclictest	674456	-21	/usr/sbin/munin	08:35:01	2
588531	99	43	37,4	cyclictest	813055	-21	kworker/u8:1+flush-8:0	11:10:27	1
588525	99	43	32,9	cyclictest	643901	-21	ntpq	08:00:38	0
588531	99	42	35,5	cyclictest	567992	-21	kworker/u8:3+events_unbound	07:50:43	1
588256	2	42	27,10	sleep1	0	-21	swapper/1	07:08:57	1
588531	99	41	36,4	cyclictest	503921	-21	kworker/u8:0+events_unbound	07:25:44	1
588531	99	41	34,5	cyclictest	908415	-21	kworker/u8:2+flush-8:0	12:30:31	1
588531	99	41	29,9	cyclictest	792661	-21	ntpq	10:30:39	1
588531	99	40	34,4	cyclictest	567992	-21	kworker/u8:3+events_unbound	09:15:43	1
588531	99	40	33,6	cyclictest	758968	-21	kworker/u8:3+events_unbound	10:35:42	1
588531	99	40	33,6	cyclictest	567992	-21	kworker/u8:3+events_unbound	07:30:48	1
588535	99	39	30,7	cyclictest	729053	-21	apt-get	09:30:00	2
588531	99	39	31,6	cyclictest	783892	-21	kworker/u8:1+flush-8:0	10:25:42	1
588531	99	39	24,10	cyclictest	729053	-21	apt-get	09:30:01	1
588525	99	39	30,7	cyclictest	862438	-21	ntpq	11:40:41	0
588525	99	39	30,7	cyclictest	862438	-21	ntpq	11:40:41	0
588525	99	39	30,7	cyclictest	819012	-21	/usr/sbin/munin	11:00:39	0
588525	99	39	26,10	cyclictest	758968	-21	kworker/u8:3+flush-8:0	11:25:12	0
588525	99	39	1,37	cyclictest	758984	-21	kworker/0:2+events	10:21:05	0
613371	2	38	0,5	sleep3	45	1	irq_work/3	07:30:41	3
588535	99	38	34,3	cyclictest	567992	-21	kworker/u8:3+events_unbound	08:25:01	2
588531	99	38	34,3	cyclictest	758968	-21	kworker/u8:3+flush-8:0	12:05:46	1
588531	99	38	33,3	cyclictest	588395	-21	kworker/u8:1+flush-8:0	07:10:46	1
588531	99	38	30,6	cyclictest	758968	-21	kworker/u8:3+events_unbound	10:55:31	1
588531	99	38	30,6	cyclictest	723261	-21	kworker/u8:2+flush-8:0	10:10:46	1
588531	99	38	29,6	cyclictest	1704890	-21	systemd-journal	11:47:41	1
588525	99	38	32,4	cyclictest	669507	-21	kworker/u8:0+flush-8:0	09:50:31	0
588535	99	37	33,3	cyclictest	723261	-21	kworker/u8:2+flush-8:0	09:20:44	2
588531	99	37	32,4	cyclictest	902221	-21	kworker/u8:0+events_unbound	12:20:46	1
588531	99	37	31,4	cyclictest	758968	-21	kworker/u8:3+events_unbound	10:20:37	1
588531	99	37	29,5	cyclictest	858665	-21	apt-get	11:40:27	1
588531	99	37	29,5	cyclictest	858665	-21	apt-get	11:40:27	1
588535	99	36	31,3	cyclictest	758968	-21	kworker/u8:3+events_unbound	10:05:30	2
588531	99	36	28,5	cyclictest	503921	-21	kworker/u8:0+events_unbound	07:20:40	1
588531	99	36	27,6	cyclictest	689533	-21	latency_hist	08:50:01	1
588525	99	36	31,4	cyclictest	614902	-21	kworker/u8:1+flush-8:0	08:10:47	0
588525	99	36	30,5	cyclictest	669507	-21	kworker/u8:0+flush-8:0	08:32:11	0
588525	99	36	25,10	cyclictest	793200	-21	kworker/u8:2+flush-8:0	12:20:02	0
588525	99	36	0,34	cyclictest	1	-21	systemd	07:45:00	0
588525	99	35	31,3	cyclictest	804527	-21	irqrtprio	10:45:34	0
588525	99	35	29,5	cyclictest	813055	-21	kworker/u8:1+flush-8:0	10:55:01	0
588525	99	35	26,7	cyclictest	679385	-21	latency_hist	08:40:00	0
588525	99	35	2,31	cyclictest	639924	-21	kworker/0:1+events	09:30:09	0
588525	99	35	1,33	cyclictest	798607	-21	kworker/0:1+events	11:59:51	0
588535	99	34	29,4	cyclictest	620373	-21	kworker/u8:2+flush-8:0	07:55:48	2
588535	99	34	29,4	cyclictest	620373	-21	kworker/u8:2+flush-8:0	07:55:47	2
588531	99	34	27,5	cyclictest	758968	-21	kworker/u8:3+events_unbound	10:40:31	1
588531	99	34	27,5	cyclictest	567992	-21	kworker/u8:3+flush-8:0	08:55:35	1
588531	99	34	26,6	cyclictest	645118	-21	apt-get	08:05:25	1
588531	99	34	24,7	cyclictest	813055	-21	kworker/u8:1+flush-8:0	11:35:40	1
588525	99	34	8,21	cyclictest	798607	-21	kworker/0:1+events	12:15:05	0
588525	99	34	29,4	cyclictest	813055	-21	kworker/u8:1+events_unbound	12:30:47	0
588525	99	34	25,6	cyclictest	763903	-21	latency_hist	10:05:02	0
588525	99	34	2,31	cyclictest	568743	-21	kworker/0:3+events	07:57:51	0
588525	99	34	2,31	cyclictest	568743	-21	kworker/0:3+events	07:57:50	0
588525	99	34	2,30	cyclictest	639924	-21	kworker/0:1+events	09:48:41	0
588525	99	34	2,30	cyclictest	639924	-21	kworker/0:1+events	09:48:40	0
588525	99	34	2,26	cyclictest	639924	-21	kworker/0:1+events	09:25:18	0
773120	2	33	0,5	sleep3	45	1	irq_work/3	10:10:45	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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