OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sat Apr 25, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2325788	99	49	43,4	cyclictest	2558877	-21	cp	22:55:00	1
2325788	99	45	40,3	cyclictest	2346324	-21	kworker/u8:1+flush-259:0	19:45:17	1
2325785	99	42	39,2	cyclictest	2564273	-21	kworker/u8:3+events_unbound	00:10:23	0
2325795	99	40	36,3	cyclictest	2610509	-21	kworker/u8:0+flush-259:0	00:15:20	3
2325785	99	40	37,2	cyclictest	2475418	-21	kworker/u8:2+flush-259:0	21:45:00	0
2325785	99	40	37,2	cyclictest	2387505	-21	kworker/u8:1+flush-259:0	21:10:23	0
2325785	99	39	32,5	cyclictest	2414071	-21	diskstats	20:35:13	0
2325791	99	37	31,4	cyclictest	2372423	-21	diskstats	19:55:13	2
2325785	99	37	30,5	cyclictest	2365963	-21	ntpq	19:45:22	0
2325785	99	36	33,2	cyclictest	2393071	-21	kworker/u8:3+flush-259:0	20:30:21	0
2325785	99	36	33,2	cyclictest	2346324	-21	kworker/u8:1+flush-259:0	19:50:20	0
2325785	99	36	29,5	cyclictest	2340252	-21	ntpq	19:20:21	0
2325791	99	35	29,4	cyclictest	252	-21	systemd-journal	19:25:24	2
2325785	99	35	32,2	cyclictest	2393071	-21	kworker/u8:3+flush-259:0	21:00:00	0
2325785	99	35	32,2	cyclictest	2387505	-21	kworker/u8:1+events_unbound	20:15:15	0
2325785	99	35	28,5	cyclictest	2569810	-21	diskstats	23:05:13	0
2325791	99	34	31,2	cyclictest	2393071	-21	kworker/u8:3+events_unbound	20:45:16	2
2325788	99	34	30,3	cyclictest	2393071	-21	kworker/u8:3+flush-259:0	20:50:00	1
2325788	99	34	28,4	cyclictest	252	-21	systemd-journal	19:52:24	1
2325785	99	34	31,2	cyclictest	2573652	-21	kworker/u8:1+flush-259:0	23:30:21	0
2325785	99	34	30,3	cyclictest	2475418	-21	kworker/u8:2+events_unbound	21:55:01	0
2325788	99	33	27,4	cyclictest	2625907	-21	latency_hist	00:00:01	1
2325785	99	33	30,2	cyclictest	2387505	-21	kworker/u8:1+flush-259:0	21:04:59	0
2325785	99	33	26,5	cyclictest	2511063	-21	ntpq	22:05:20	0
2325788	99	32	26,4	cyclictest	2512209	-21	/usr/sbin/munin	22:10:13	1
2325785	99	32	28,3	cyclictest	2304429	-21	kworker/u8:3+flush-259:0	19:10:23	0
2325791	99	31	26,4	cyclictest	509	-21	rs:main		2
2325788	99	31	27,3	cyclictest	2475418	-21	kworker/u8:2+flush-259:0	22:45:19	1
2325788	99	31	26,3	cyclictest	2620770	-21	kworker/u8:2+events_unbound	00:35:01	1
2325788	99	31	24,5	cyclictest	2407629	-21	ntpq	20:25:22	1
2325785	99	31	27,3	cyclictest	2573652	-21	kworker/u8:1+events_unbound	23:45:23	0
2325785	99	31	27,3	cyclictest	2507070	-21	kworker/u8:0+flush-259:0	22:10:23	0
2325785	99	31	27,3	cyclictest	2304429	-21	kworker/u8:3+events_unbound	19:25:13	0
2325785	99	31	27,3	cyclictest	2282574	-21	kworker/u8:2+flush-259:0	19:55:16	0
2325785	99	31	0,29	cyclictest	1	-21	systemd	21:30:00	0
2325795	99	30	24,4	cyclictest	2449579	-21	latency_hist	21:10:01	3
2325791	99	30	27,2	cyclictest	2387505	-21	kworker/u8:1+events_unbound	20:55:18	2
2325791	99	30	26,3	cyclictest	2573652	-21	kworker/u8:1+flush-259:0	23:35:17	2
2325791	99	30	26,3	cyclictest	2573652	-21	kworker/u8:1+flush-259:0	23:35:16	2
2325785	99	30	26,3	cyclictest	2610509	-21	kworker/u8:0+events_unbound	00:00:20	0
2325785	99	30	26,3	cyclictest	2610509	-21	kworker/u8:0+events_unbound	00:00:01	0
2325788	99	29	23,4	cyclictest	2475658	-21	apt-get	21:35:12	1
2325788	99	29	22,5	cyclictest	2542385	-21	ntpq	22:35:21	1
2325788	99	29	21,5	cyclictest	2636189	-21	latency_hist	00:10:00	1
2325785	99	29	25,3	cyclictest	2393071	-21	kworker/u8:3+events_unbound	20:50:12	0
2325785	99	29	23,4	cyclictest	2480417	-21	apt-get	21:38:20	0
2325791	99	28	24,3	cyclictest	2282574	-21	kworker/u8:2+events_unbound	20:00:14	2
2325785	99	28	24,3	cyclictest	2610509	-21	kworker/u8:0+events_unbound	00:15:15	0
2325785	99	28	24,3	cyclictest	2573652	-21	kworker/u8:1+events_unbound	23:26:24	0
2325785	99	28	24,3	cyclictest	2475418	-21	kworker/u8:2+flush-259:0	22:45:24	0
2325785	99	28	24,3	cyclictest	2393071	-21	kworker/u8:3+events_unbound	20:41:28	0
2325785	99	28	24,3	cyclictest	2387505	-21	kworker/u8:1+events_unbound	21:30:23	0
2325795	99	27	21,4	cyclictest	2366870	-21	latency_hist	19:50:00	3
2325791	99	27	24,2	cyclictest	2538156	-21	kworker/u8:0+flush-259:0	22:35:24	2
2325791	99	27	23,3	cyclictest	2393071	-21	kworker/u8:3+events_unbound	20:20:26	2
2325791	99	27	22,4	cyclictest	252	-21	systemd-journal	21:09:59	2
2325791	99	27	22,4	cyclictest	252	-21	systemd-journal	19:45:24	2
2325785	99	27	23,3	cyclictest	2543505	-21	kworker/u8:3+events_unbound	22:40:18	0
2325785	99	27	23,3	cyclictest	2393071	-21	kworker/u8:3+events_unbound	20:45:23	0
2325785	99	27	23,3	cyclictest	2387505	-21	kworker/u8:1+flush-259:0	20:10:20	0
2325785	99	27	23,2	cyclictest	2475418	-21	kworker/u8:2+flush-259:0	22:55:21	0
2325795	99	26	21,3	cyclictest	2387505	-21	kworker/u8:1+flush-259:0	21:35:16	3
2325795	99	26	20,4	cyclictest	2485807	-21	latency_hist	21:45:01	3
2325788	99	26	22,3	cyclictest	2564273	-21	kworker/u8:3+flush-259:0	23:50:21	1
2325788	99	26	22,3	cyclictest	2449476	-21	kworker/u8:0+flush-259:0	21:50:26	1
2325788	99	26	22,3	cyclictest	2366902	-21	kworker/u8:3+flush-259:0	20:00:26	1
2325788	99	26	20,4	cyclictest	2449821	-21	/usr/sbin/munin	21:10:13	1
2325788	99	26	19,5	cyclictest	2398445	-21	/usr/sbin/munin	20:20:12	1
2325785	99	26	22,3	cyclictest	2564273	-21	kworker/u8:3+flush-259:0	23:10:20	0
2325785	99	26	22,3	cyclictest	2564273	-21	kworker/u8:3+events_unbound	23:15:25	0
2325785	99	26	22,3	cyclictest	2507070	-21	kworker/u8:0+flush-259:0	22:15:16	0
2325785	99	26	22,3	cyclictest	2304429	-21	kworker/u8:3+events_unbound	19:15:23	0
2325785	99	26	22,3	cyclictest	2282574	-21	kworker/u8:2+flush-259:0	20:00:21	0
2325791	99	25	22,2	cyclictest	2387505	-21	kworker/u8:1+events_unbound	21:30:19	2
2325788	99	25	21,3	cyclictest	2387505	-21	kworker/u8:1+flush-259:0	22:25:22	1
2325785	99	25	21,3	cyclictest	2475418	-21	kworker/u8:2+flush-259:0	23:00:24	0
2325785	99	25	21,3	cyclictest	2304429	-21	kworker/u8:3+events_unbound	19:31:19	0
2325791	99	24	20,3	cyclictest	2393071	-21	kworker/u8:3+flush-259:0	21:25:25	2
2325791	99	24	20,3	cyclictest	2387505	-21	kworker/u8:1+flush-259:0	20:39:59	2
2325791	99	24	20,3	cyclictest	2282574	-21	kworker/u8:2+events_unbound	20:05:21	2
2325788	99	24	19,3	cyclictest	509	-21	rs:main		1
2325788	99	24	18,4	cyclictest	2506429	-21	http	22:05:01	1
2325785	99	24	19,4	cyclictest	2564273	-21	kworker/u8:3+events_unbound	00:29:26	0
2325785	99	24	18,5	cyclictest	2496347	-21	/usr/sbin/munin	21:55:13	0
2325795	99	23	19,3	cyclictest	2590009	-21	kworker/u8:2+flush-259:0	23:40:00	3
2325795	99	23	19,3	cyclictest	2590009	-21	kworker/u8:2+flush-259:0	23:40:00	3
2325795	99	23	19,3	cyclictest	2393071	-21	kworker/u8:3+flush-259:0	21:15:00	3
2325795	99	23	18,3	cyclictest	2351721	-21	apt-get	19:35:11	3
2325788	99	23	20,1	cyclictest	2564273	-21	kworker/u8:3+flush-259:0	23:25:01	1
2325788	99	23	19,3	cyclictest	2475418	-21	kworker/u8:2+flush-259:0	21:45:18	1
2325788	99	23	19,3	cyclictest	2393071	-21	kworker/u8:3+flush-259:0	20:54:59	1
2325788	99	23	18,4	cyclictest	2559348	-21	/usr/sbin/munin	22:55:13	1
2325788	99	23	18,4	cyclictest	2465332	-21	/usr/sbin/munin	21:25:14	1
2325788	99	23	18,3	cyclictest	2387505	-21	kworker/u8:1+flush-259:0	21:30:16	1
2325785	99	23	19,3	cyclictest	2573652	-21	kworker/u8:1+events_unbound	23:36:59	0
2325785	99	23	19,3	cyclictest	2573652	-21	kworker/u8:1+events_unbound	23:36:59	0
2325785	99	23	19,3	cyclictest	2573652	-21	kworker/u8:1+events_unbound	23:20:21	0
2325785	99	23	19,3	cyclictest	2475418	-21	kworker/u8:2+flush-259:0	22:50:24	0
2325785	99	23	19,3	cyclictest	2393071	-21	kworker/u8:3+events_unbound	21:16:37	0
2325785	99	23	18,4	cyclictest	2522449	-21	kworker/u8:3+events_unbound	22:31:52	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34