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 Sat Jul 04, 2026 00:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2380251	2	72	0,2	sleep3	0	-21	swapper/3	21:25:18	3
2240871	99	72	67,3	cyclictest	2402534	-21	kworker/u8:0+events_unbound	22:05:27	1
2240871	99	72	63,7	cyclictest	2402534	-21	kworker/u8:0+flush-8:0	21:55:22	1
2240871	99	67	60,5	cyclictest	2291764	-21	kworker/u8:1+flush-8:0	22:35:27	1
2240871	99	67	58,6	cyclictest	2272966	-21	kworker/u8:0+events_unbound	19:40:20	1
2240875	99	66	58,6	cyclictest	1704890	-21	systemd-journal	20:00:00	2
2240871	99	66	60,4	cyclictest	2512162	-21	kworker/u8:1+events_unbound	00:20:28	1
2240871	99	66	58,6	cyclictest	2402534	-21	kworker/u8:0+flush-8:0	23:35:23	1
2240869	99	66	62,3	cyclictest	2251650	-21	kworker/u8:4+events_unbound	19:30:26	0
2299541	2	63	0,6	sleep0	0	-21	swapper/0	20:05:18	0
2240871	99	61	54,5	cyclictest	2251650	-21	kworker/u8:4+flush-8:0	19:30:21	1
2240871	99	61	50,8	cyclictest	2392385	-21	kworker/u8:3+flush-8:0	22:30:23	1
2240871	99	60	54,4	cyclictest	2392385	-21	kworker/u8:3+events_unbound	22:20:09	1
2240871	99	59	54,4	cyclictest	2512162	-21	kworker/u8:1+events_unbound	00:15:27	1
2240871	99	59	52,5	cyclictest	2392385	-21	kworker/u8:3+flush-8:0	22:00:23	1
2240871	99	59	52,5	cyclictest	2392385	-21	kworker/u8:3+flush-8:0	22:00:23	1
2240871	99	59	52,5	cyclictest	2240746	-21	kworker/u8:2+flush-8:0	20:45:29	1
2240869	99	59	49,7	cyclictest	2258444	-21	diskstats	19:25:12	0
2240871	99	58	53,3	cyclictest	2240746	-21	kworker/u8:2+flush-8:0	21:15:24	1
2240871	99	58	52,5	cyclictest	2491118	-21	kworker/u8:3+flush-8:0	23:55:24	1
2240871	99	58	51,5	cyclictest	2240746	-21	kworker/u8:2+events_unbound	20:15:23	1
2240871	99	58	51,5	cyclictest	2240746	-21	kworker/u8:2+events_unbound	20:15:23	1
2240871	99	57	51,4	cyclictest	2240746	-21	kworker/u8:2+flush-8:0	20:40:28	1
2240871	99	56	52,3	cyclictest	2392385	-21	kworker/u8:3+events_unbound	22:10:27	1
2240871	99	56	51,4	cyclictest	2491118	-21	kworker/u8:3+events_unbound	23:40:21	1
2240871	99	55	48,5	cyclictest	2476612	-21	kworker/u8:1+flush-8:0	23:15:10	1
2240871	99	55	48,5	cyclictest	2251649	-21	kworker/u8:3+events_unbound	19:35:20	1
2240871	99	55	47,6	cyclictest	2491118	-21	kworker/u8:3+flush-8:0	23:50:23	1
2240871	99	54	49,3	cyclictest	2452392	-21	kworker/u8:2+events_unbound	23:10:23	1
2240871	99	54	48,5	cyclictest	2251650	-21	kworker/u8:4+events_unbound	20:00:23	1
2240871	99	54	48,4	cyclictest	2291764	-21	kworker/u8:1+flush-8:0	20:30:25	1
2240871	99	54	48,4	cyclictest	2291764	-21	kworker/u8:1+events_unbound	20:20:24	1
2240871	99	54	48,4	cyclictest	2291764	-21	kworker/u8:1+events_unbound	20:20:23	1
2240871	99	54	45,7	cyclictest	2452392	-21	kworker/u8:2+flush-8:0	22:55:22	1
2240869	99	53	42,8	cyclictest	1704890	-21	systemd-journal	20:15:00	0
2240869	99	53	42,8	cyclictest	1704890	-21	systemd-journal	20:14:59	0
2240869	99	53	37,5	cyclictest	2209316	-21	munin-node	19:15:01	0
2240871	99	52	46,4	cyclictest	2251650	-21	kworker/u8:4+events_unbound	19:25:24	1
2240871	99	52	43,7	cyclictest	1704890	-21	systemd-journal	19:10:18	1
2240875	99	51	44,5	cyclictest	2377100	-21	cp	21:25:00	2
2240871	99	51	46,4	cyclictest	2512162	-21	kworker/u8:1+flush-8:0	00:10:29	1
2240871	99	51	44,5	cyclictest	2556589	-21	kworker/u8:2+events_unbound	00:25:22	1
2442941	2	50	0,2	chrt	0	-21	swapper/2	22:30:16	2
2240871	99	50	46,3	cyclictest	2240746	-21	kworker/u8:2+flush-8:0	21:40:27	1
2240871	99	50	45,4	cyclictest	2291764	-21	kworker/u8:1+flush-8:0	21:45:24	1
2240871	99	50	43,5	cyclictest	2240746	-21	kworker/u8:2+flush-8:0	21:35:24	1
2240871	99	50	42,7	cyclictest	2392385	-21	kworker/u8:3+flush-8:0	22:45:25	1
2240871	99	50	42,6	cyclictest	2240746	-21	kworker/u8:2+flush-8:0	20:10:20	1
2240871	99	50	42,6	cyclictest	2240746	-21	kworker/u8:2+flush-8:0	20:10:20	1
2240871	99	49	44,3	cyclictest	2371476	-21	kworker/u8:3+flush-8:0	21:25:23	1
2240871	99	49	43,5	cyclictest	2291764	-21	kworker/u8:1+flush-8:0	21:10:30	1
2240871	99	48	42,4	cyclictest	2392385	-21	kworker/u8:3+events_unbound	22:15:25	1
2240871	99	48	40,5	cyclictest	2481012	-21	ntpq	23:05:20	1
2240869	99	48	38,8	cyclictest	1704890	-21	systemd-journal	00:20:00	0
2240871	99	47	41,5	cyclictest	2531788	-21	kworker/u8:2+flush-8:0	00:00:23	1
2240871	99	47	40,5	cyclictest	2251650	-21	kworker/u8:4+flush-8:0	19:55:22	1
2240871	99	47	39,6	cyclictest	2291764	-21	kworker/u8:1+flush-8:0	21:30:25	1
2240869	99	47	39,6	cyclictest	2441058	-21	ntpq	22:25:21	0
2240871	99	46	40,5	cyclictest	2392385	-21	kworker/u8:3+events_unbound	22:25:12	1
2240871	99	46	40,4	cyclictest	2491118	-21	kworker/u8:3+events_unbound	23:50:01	1
2240871	99	45	40,3	cyclictest	2291764	-21	kworker/u8:1+events_unbound	20:05:22	1
2240871	99	45	38,5	cyclictest	2512162	-21	kworker/u8:1+flush-8:0	00:05:23	1
2240871	99	45	38,5	cyclictest	2512162	-21	kworker/u8:1+flush-8:0	00:05:22	1
2240869	99	45	38,4	cyclictest	1	-21	systemd	21:59:59	0
2240871	99	44	36,6	cyclictest	2240746	-21	kworker/u8:2+flush-8:0	20:25:21	1
2240871	99	44	33,9	cyclictest	2476013	-21	ntpq	23:00:19	1
2240869	99	44	37,5	cyclictest	2277954	-21	apt-get	19:45:09	0
2240869	99	44	33,9	cyclictest	2541074	-21	ntpq	00:05:22	0
2240869	99	44	33,9	cyclictest	2541074	-21	ntpq	00:05:21	0
2240869	99	44	32,9	cyclictest	2377743	-21	diskstats	21:25:13	0
2240875	99	43	37,4	cyclictest	2251650	-21	kworker/u8:4+flush-8:0	19:45:13	2
2240875	99	43	31,9	cyclictest	2347362	-21	cat	20:55:01	2
2240871	99	43	38,4	cyclictest	2491118	-21	kworker/u8:3+flush-8:0	23:30:26	1
2240871	99	43	36,5	cyclictest	2556589	-21	kworker/u8:2+flush-8:0	00:35:20	1
2240869	99	43	33,7	cyclictest	2462308	-21	/usr/sbin/munin	22:50:19	0
2240871	99	42	36,5	cyclictest	2291764	-21	kworker/u8:1+flush-8:0	21:00:14	1
2240871	99	42	36,4	cyclictest	2311532	-21	kworker/u8:3+flush-8:0	20:35:18	1
2240871	99	42	36,4	cyclictest	2251650	-21	kworker/u8:4+events_unbound	19:15:26	1
2240875	99	41	32,7	cyclictest	1704890	-21	systemd-journal	20:30:00	2
2240871	99	41	37,3	cyclictest	2491118	-21	kworker/u8:3+flush-8:0	23:20:19	1
2240871	99	41	35,5	cyclictest	2291764	-21	kworker/u8:1+flush-8:0	20:50:22	1
2240871	99	41	35,4	cyclictest	2452392	-21	kworker/u8:2+events_unbound	22:40:15	1
2240871	99	41	34,5	cyclictest	2251649	-21	kworker/u8:3+flush-8:0	19:20:11	1
2240869	99	41	32,7	cyclictest	2346088	-21	ntpq	20:50:23	0
2240869	99	41	27,11	cyclictest	1704890	-21	systemd-journal	20:25:00	0
2240869	99	41	27,11	cyclictest	1704890	-21	systemd-journal	20:25:00	0
2240632	2	41	27,9	sleep1	0	-21	swapper/1	19:09:00	1
2240871	99	39	34,3	cyclictest	2240746	-21	kworker/u8:2+flush-8:0	19:50:26	1
2240871	99	39	33,5	cyclictest	2452392	-21	kworker/u8:2+flush-8:0	23:25:23	1
2240871	99	39	33,4	cyclictest	2291764	-21	kworker/u8:1+events_unbound	20:55:19	1
2240875	99	37	31,4	cyclictest	2387252	-21	cp	21:35:00	2
2240869	99	37	8,12	cyclictest	589	-21	runrttasks	21:45:10	0
2240869	99	37	26,9	cyclictest	2422665	-21	diskstats	22:10:12	0
2240871	99	36	24,8	cyclictest	1704890	-21	systemd-journal	00:30:38	1
2240869	99	36	29,5	cyclictest	2502021	-21	latency_hist	23:30:02	0
2240869	99	36	26,7	cyclictest	2342063	-21	latency_hist	20:50:01	0
2240875	99	35	29,4	cyclictest	2402534	-21	kworker/u8:0+events_unbound	22:20:01	2
2240871	99	35	29,5	cyclictest	2402534	-21	kworker/u8:0+flush-8:0	21:50:11	1
2240869	99	35	28,4	cyclictest	2506958	-21	latency_hist	23:35:01	0
2240869	99	35	26,7	cyclictest	2307620	-21	/usr/sbin/munin	20:15:21	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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