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
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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sat May 16, 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
2275545	99	52	49,2	cyclictest	2414986	-21	kworker/u8:1+flush-259:0	21:25:21	1
2275550	99	50	47,2	cyclictest	2518770	-21	kworker/u8:5+events_unbound	23:50:24	3
2275550	99	47	44,2	cyclictest	2311521	-21	kworker/u8:2+flush-259:0	20:10:21	3
2275550	99	47	42,3	cyclictest	2337406	-21	latency_hist	20:10:01	3
2275542	99	46	39,5	cyclictest	2539091	-21	latency_hist	23:25:01	0
2275550	99	43	40,2	cyclictest	2414986	-21	kworker/u8:1+events_unbound	23:10:21	3
2275545	99	43	40,2	cyclictest	2301559	-21	kworker/u8:1+flush-259:0	20:30:44	1
2275542	99	43	39,3	cyclictest	2523926	-21	apt-get	23:10:10	0
2275545	99	42	39,2	cyclictest	2311521	-21	kworker/u8:2+flush-259:0	19:55:30	1
2275545	99	42	39,2	cyclictest	2275749	-21	kworker/u8:3+flush-259:0	19:20:24	1
2275550	99	41	39,1	cyclictest	2518770	-21	kworker/u8:5+flush-259:0	23:30:21	3
2275550	99	41	38,2	cyclictest	2456879	-21	kworker/u8:0+flush-259:0	22:15:00	3
2275550	99	40	37,2	cyclictest	2425360	-21	kworker/u8:3+flush-259:0	21:45:23	3
2275550	99	40	36,3	cyclictest	2575552	-21	kworker/u8:1+events_unbound	00:20:45	3
2275550	99	40	36,3	cyclictest	2575552	-21	kworker/u8:1+events_unbound	00:20:44	3
2275545	99	40	37,2	cyclictest	2285470	-21	kworker/u8:0+events_unbound	19:30:24	1
2275545	99	40	36,3	cyclictest	2435529	-21	kworker/u8:2+events_unbound	22:56:44	1
2275545	99	40	36,3	cyclictest	2275749	-21	kworker/u8:3+events_unbound	19:15:25	1
2275542	99	40	33,5	cyclictest	2590985	-21	latency_hist	00:15:00	0
2275550	99	39	32,5	cyclictest	2445117	-21	ntpq	21:50:21	3
2275546	99	39	34,3	cyclictest	2575552	-21	kworker/u8:1+flush-259:0	00:10:15	2
2275550	99	38	35,2	cyclictest	2311521	-21	kworker/u8:2+events_unbound	19:55:22	3
2275550	99	38	34,3	cyclictest	2518770	-21	kworker/u8:5+flush-259:0	23:05:21	3
2275550	99	38	34,3	cyclictest	2435529	-21	kworker/u8:2+events_unbound	23:36:13	3
2275550	99	38	34,3	cyclictest	2363106	-21	kworker/u8:2+events_unbound	21:12:45	3
2275545	99	38	34,2	cyclictest	1564019	-21	kworker/u8:2+flush-259:0	19:10:44	1
2275550	99	37	33,3	cyclictest	2414986	-21	kworker/u8:1+events_unbound	22:49:45	3
2275550	99	37	33,2	cyclictest	2414986	-21	kworker/u8:1+flush-259:0	21:30:17	3
2275546	99	37	31,4	cyclictest	2451084	-21	latency_hist	22:00:00	2
2275546	99	37	29,5	cyclictest	2595299	-21	ntpq	00:15:22	2
2275545	99	37	34,2	cyclictest	2414986	-21	kworker/u8:1+events_unbound	22:46:03	1
2275545	99	37	33,3	cyclictest	2456879	-21	kworker/u8:0+events_unbound	22:22:44	1
2275545	99	37	33,3	cyclictest	2435529	-21	kworker/u8:2+events_unbound	22:06:44	1
2275545	99	37	33,3	cyclictest	2414986	-21	kworker/u8:1+events_unbound	22:10:14	1
2275542	99	37	31,4	cyclictest	2379214	-21	apt-get	20:50:12	0
2275542	99	37	31,4	cyclictest	2357331	-21	kworker/u8:0+flush-259:0	21:20:25	0
2275550	99	36	33,2	cyclictest	2575552	-21	kworker/u8:1+events_unbound	00:30:01	3
2275550	99	36	33,2	cyclictest	2575552	-21	kworker/u8:1+events_unbound	00:30:00	3
2275550	99	36	33,2	cyclictest	2456879	-21	kworker/u8:0+flush-259:0	22:20:23	3
2275550	99	36	32,3	cyclictest	2435529	-21	kworker/u8:2+events_unbound	22:54:45	3
2275550	99	36	32,3	cyclictest	2425360	-21	kworker/u8:3+flush-259:0	21:35:21	3
2275550	99	36	32,3	cyclictest	2357331	-21	kworker/u8:0+events_unbound	20:29:44	3
2275545	99	36	33,2	cyclictest	2456879	-21	kworker/u8:0+events_unbound	22:15:22	1
2275545	99	36	32,3	cyclictest	2591213	-21	kworker/u8:0+events_unbound	00:28:45	1
2275545	99	36	32,3	cyclictest	2591213	-21	kworker/u8:0+events_unbound	00:28:44	1
2275545	99	36	32,3	cyclictest	2357331	-21	kworker/u8:0+flush-259:0	20:50:42	1
2275550	99	35	32,2	cyclictest	2357331	-21	kworker/u8:0+events_unbound	21:07:44	3
2275545	99	35	31,3	cyclictest	2518770	-21	kworker/u8:5+events_unbound	23:31:12	1
2275542	99	35	31,3	cyclictest	2435529	-21	kworker/u8:2+flush-259:0	22:10:26	0
2275550	99	34	31,2	cyclictest	2456879	-21	kworker/u8:0+flush-259:0	22:25:21	3
2275550	99	34	31,2	cyclictest	2456879	-21	kworker/u8:0+flush-259:0	22:15:20	3
2275550	99	34	31,2	cyclictest	2363106	-21	kworker/u8:2+events_unbound	20:56:45	3
2275550	99	34	31,2	cyclictest	2301559	-21	kworker/u8:1+events_unbound	20:31:45	3
2275550	99	34	30,3	cyclictest	2503046	-21	kworker/u8:0+events_unbound	23:02:45	3
2275550	99	34	30,3	cyclictest	2275749	-21	kworker/u8:3+events_unbound	19:27:44	3
2275545	99	34	28,4	cyclictest	252	-21	systemd-journal	22:32:43	1
2275550	99	33	31,2	cyclictest	2373414	-21	kworker/u8:3+events_unbound	20:47:45	3
2275550	99	33	30,2	cyclictest	2518770	-21	kworker/u8:5+events_unbound	23:18:44	3
2275550	99	33	30,2	cyclictest	2435529	-21	kworker/u8:2+flush-259:0	00:00:00	3
2275550	99	33	29,3	cyclictest	2357331	-21	kworker/u8:0+events_unbound	20:51:45	3
2275546	99	33	26,5	cyclictest	252	-21	systemd-journal	21:15:43	2
2275545	99	33	30,3	cyclictest	2357331	-21	kworker/u8:0+events_unbound	21:10:44	1
2275545	99	33	30,2	cyclictest	2591213	-21	kworker/u8:0+flush-259:0	00:15:21	1
2275545	99	33	30,2	cyclictest	2575552	-21	kworker/u8:1+events_unbound	00:38:26	1
2275545	99	33	30,2	cyclictest	2435529	-21	kworker/u8:2+events_unbound	23:21:11	1
2275545	99	33	29,3	cyclictest	2607062	-21	kworker/u8:2+events_unbound	00:32:44	1
2275545	99	33	29,3	cyclictest	2414986	-21	kworker/u8:1+events_unbound	22:00:17	1
2275550	99	32	28,3	cyclictest	2306728	-21	/usr/sbin/munin	19:40:13	3
2275546	99	32	25,5	cyclictest	252	-21	systemd-journal	23:01:05	2
2275545	99	32	29,2	cyclictest	2414986	-21	kworker/u8:1+events_unbound	21:30:50	1
2275545	99	32	29,2	cyclictest	2357331	-21	kworker/u8:0+events_unbound	21:21:45	1
2275545	99	32	28,3	cyclictest	2301559	-21	kworker/u8:1+events_unbound	20:05:23	1
2275542	99	32	28,3	cyclictest	2435529	-21	kworker/u8:2+flush-259:0	21:50:14	0
2275542	99	32	27,4	cyclictest	2472140	-21	kworker/u8:3+flush-259:0	22:35:22	0
2275550	99	31	29,2	cyclictest	2357331	-21	kworker/u8:0+flush-259:0	21:20:24	3
2275550	99	31	28,2	cyclictest	2301559	-21	kworker/u8:1+events_unbound	20:36:44	3
2275550	99	31	27,3	cyclictest	2414986	-21	kworker/u8:1+events_unbound	22:01:44	3
2275545	99	31	28,2	cyclictest	2435529	-21	kworker/u8:2+events_unbound	22:27:45	1
2275545	99	31	27,3	cyclictest	2518770	-21	kworker/u8:5+events_unbound	23:45:13	1
2275545	99	31	25,4	cyclictest	252	-21	systemd-journal	20:05:00	1
2275542	99	31	27,3	cyclictest	2357331	-21	kworker/u8:0+flush-259:0	21:05:25	0
2275550	99	30	27,2	cyclictest	2472140	-21	kworker/u8:3+events_unbound	22:42:43	3
2275550	99	30	27,2	cyclictest	2414986	-21	kworker/u8:1+events_unbound	22:05:24	3
2275550	99	30	24,2	cyclictest	1564019	-21	kworker/u8:2+events_unbound	19:10:22	3
2275545	99	30	27,3	cyclictest	2363106	-21	kworker/u8:2+flush-259:0	21:15:19	1
2275545	99	30	27,2	cyclictest	2575552	-21	kworker/u8:1+flush-259:0	00:20:21	1
2275545	99	30	27,2	cyclictest	2575552	-21	kworker/u8:1+flush-259:0	00:20:21	1
2275545	99	30	26,3	cyclictest	2518770	-21	kworker/u8:5+events_unbound	23:58:43	1
2275545	99	30	26,3	cyclictest	2301559	-21	kworker/u8:1+events_unbound	20:38:43	1
2275542	99	30	23,5	cyclictest	2563894	-21	ntpq	23:45:21	0
2275542	99	30	22,5	cyclictest	2611084	-21	ntpq	00:30:20	0
2275550	99	29	26,2	cyclictest	2575552	-21	kworker/u8:1+events_unbound	00:38:45	3
2275546	99	29	23,4	cyclictest	2617423	-21	cat	00:40:01	2
2275545	99	29	25,3	cyclictest	2275749	-21	kworker/u8:3+events_unbound	19:28:43	1
2275545	99	29	23,4	cyclictest	252	-21	systemd-journal	21:02:44	1
2275542	99	29	26,2	cyclictest	2394418	-21	kworker/u8:3+events_unbound	21:05:01	0
2275542	99	29	0,27	cyclictest	1	-21	systemd	19:22:43	0
2275550	99	28	25,3	cyclictest	2518770	-21	kworker/u8:5+events_unbound	23:41:13	3
2275550	99	28	25,2	cyclictest	2472140	-21	kworker/u8:3+flush-259:0	22:35:16	3
2275546	99	28	22,4	cyclictest	2420175	-21	latency_hist	21:30:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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