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 50 highest latencies:

System rackeslot4s.osadl.org (updated Fri Jun 19, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2237621	99	40	34,4	cyclictest	2555000	-21	latency_hist	00:15:00	3
2237612	99	38	31,5	cyclictest	2528707	-21	cat	23:50:01	0
2237617	99	37	34,2	cyclictest	2424743	-21	kworker/u8:4+events_unbound	22:11:47	2
2237612	99	36	29,5	cyclictest	2538569	-21	ntpq	23:55:21	0
2237617	99	35	32,2	cyclictest	2560203	-21	kworker/u8:3+events_unbound	00:29:11	2
2237614	99	35	31,3	cyclictest	2450440	-21	kworker/u8:5+flush-259:0	22:40:00	1
2237612	99	35	29,5	cyclictest	2382727	-21	latency_hist	21:30:00	0
2237617	99	34	31,2	cyclictest	2263053	-21	kworker/u8:1+events_unbound	19:47:10	2
2237614	99	34	29,3	cyclictest	2570500	-21	latency_hist	00:30:01	1
2237617	99	33	30,2	cyclictest	2237790	-21	kworker/u8:0+events_unbound	20:08:12	2
2237617	99	33	30,2	cyclictest	2232423	-21	kworker/u8:3+events_unbound	20:32:10	2
2237612	99	33	27,4	cyclictest	2507701	-21	latency_hist	23:30:00	0
2237617	99	32	28,3	cyclictest	2351811	-21	kworker/u8:3+events_unbound	21:32:22	2
2237614	99	32	30,1	cyclictest	2242414	-21	fwupd	19:11:09	1
2237614	99	32	29,2	cyclictest	2424534	-21	kworker/u8:0+flush-259:0	22:50:00	1
2237612	99	32	25,5	cyclictest	2549012	-21	ntpq	00:05:23	0
2237612	99	32	25,5	cyclictest	2485678	-21	ntpq	23:05:22	0
2237614	99	30	26,3	cyclictest	2330675	-21	kworker/u8:1+events_unbound	20:50:18	1
2237614	99	30	26,3	cyclictest	2232423	-21	kworker/u8:3+flush-259:0	20:05:00	1
2237617	99	28	24,3	cyclictest	2351811	-21	kworker/u8:3+events_unbound	21:49:57	2
2237617	99	28	24,3	cyclictest	2253694	-21	kworker/u8:2+events_unbound	21:42:11	2
2237614	99	28	22,4	cyclictest	509	-21	rs:main		1
2237614	99	27	22,3	cyclictest	335557	-21	systemd-journal	20:56:10	1
2237612	99	27	19,6	cyclictest	2428784	-21	ntpq	22:10:21	0
2237617	99	26	23,3	cyclictest	2435092	-21	kworker/u8:2+events_unbound	23:54:13	2
2237614	99	26	22,3	cyclictest	2465920	-21	kworker/u8:3+flush-259:0	23:05:26	1
2237614	99	26	21,3	cyclictest	2388154	-21	apt-get	21:35:11	1
2237614	99	26	20,4	cyclictest	335557	-21	systemd-journal	00:04:11	1
2237617	99	25	22,2	cyclictest	2435092	-21	kworker/u8:2+events_unbound	22:24:55	2
2237617	99	25	22,2	cyclictest	2253694	-21	kworker/u8:2+events_unbound	22:01:44	2
2237617	99	25	22,2	cyclictest	2232423	-21	kworker/u8:3+events_unbound	20:44:56	2
2237617	99	25	20,3	cyclictest	335557	-21	systemd-journal	21:03:11	2
2237617	99	25	19,5	cyclictest	335557	-21	systemd-journal	22:30:00	2
2237614	99	25	21,3	cyclictest	2465920	-21	kworker/u8:3+flush-259:0	22:50:25	1
2237614	99	25	19,4	cyclictest	2414208	-21	latency_hist	22:00:01	1
2237612	99	25	21,3	cyclictest	2382081	-21	kworker/u8:4+flush-259:0	21:45:00	0
2237612	99	25	18,5	cyclictest	2496073	-21	ntpq	23:15:21	0
2237621	99	24	19,3	cyclictest	2440314	-21	apt-get	22:25:11	3
2237621	99	24	1,21	cyclictest	1	-21	systemd	22:15:00	3
2237617	99	24	21,2	cyclictest	2435092	-21	kworker/u8:2+events_unbound	23:44:55	2
2237617	99	24	20,3	cyclictest	2424534	-21	kworker/u8:0+events_unbound	23:34:56	2
2237614	99	24	20,3	cyclictest	2253694	-21	kworker/u8:2+flush-259:0	22:05:00	1
2237614	99	24	20,3	cyclictest	2232423	-21	kworker/u8:3+flush-259:0	20:40:00	1
2237612	99	24	20,3	cyclictest	2435092	-21	kworker/u8:2+events_unbound	22:20:19	0
2237612	99	24	20,3	cyclictest	2232424	-21	kworker/u8:4+events_unbound	19:11:09	0
2237612	99	24	20,3	cyclictest	2232423	-21	kworker/u8:3+flush-259:0	19:20:20	0
2237612	99	24	1,22	cyclictest	1	-21	systemd	20:56:10	0
2237621	99	23	9,12	cyclictest	2247907	-21	dump-pmu-power	19:20:00	3
2237621	99	23	17,5	cyclictest	509	-21	rs:main		3
2237621	99	23	17,4	cyclictest	2549860	-21	latency_hist	00:10:01	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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