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 Sun Mar 22, 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
2505794	99	46	43,2	cyclictest	2818034	-21	kworker/u8:3+events_unbound	00:35:14	1
2505794	99	46	43,2	cyclictest	2604939	-21	kworker/u8:2+events_unbound	22:00:16	1
2505794	99	44	40,3	cyclictest	2687397	-21	kworker/u8:0+flush-259:0	23:10:21	1
2505792	99	43	37,4	cyclictest	2786665	-21	diskstats	23:40:13	0
2505798	99	42	38,3	cyclictest	451428	-21	kworker/u8:0+events_unbound	19:15:14	2
2505794	99	42	39,2	cyclictest	2797173	-21	kworker/u8:3+events_unbound	23:55:12	1
2505794	99	41	37,3	cyclictest	2691593	-21	kworker/u8:1+events_unbound	22:10:18	1
2505798	99	40	36,3	cyclictest	2691593	-21	kworker/u8:1+events_unbound	22:20:13	2
2505794	99	40	37,2	cyclictest	2594589	-21	kworker/u8:3+events_unbound	20:50:14	1
2505794	99	39	36,2	cyclictest	2521833	-21	kworker/u8:1+events_unbound	19:35:25	1
2505794	99	38	34,3	cyclictest	2547417	-21	kworker/u8:2+events_unbound	20:30:13	1
2505794	99	38	34,3	cyclictest	2547417	-21	kworker/u8:2+events_unbound	20:30:13	1
2505794	99	37	34,2	cyclictest	2776150	-21	kworker/u8:1+events_unbound	23:35:17	1
2505794	99	37	34,2	cyclictest	2594589	-21	kworker/u8:3+flush-259:0	20:45:20	1
2505794	99	37	34,2	cyclictest	2348667	-21	kworker/u8:1+flush-259:0	19:10:25	1
2505794	99	36	33,2	cyclictest	2646120	-21	kworker/u8:0+events_unbound	21:30:17	1
2505794	99	36	33,2	cyclictest	2578969	-21	kworker/u8:3+flush-259:0	20:20:24	1
2505794	99	35	31,3	cyclictest	2594589	-21	kworker/u8:3+flush-259:0	20:55:21	1
2505794	99	34	31,2	cyclictest	2818034	-21	kworker/u8:3+flush-259:0	00:15:21	1
2505794	99	34	31,2	cyclictest	2776150	-21	kworker/u8:1+flush-259:0	00:00:21	1
2505794	99	34	31,2	cyclictest	2760693	-21	kworker/u8:2+events_unbound	23:25:20	1
2505794	99	34	31,2	cyclictest	2719440	-21	kworker/u8:1+flush-259:0	22:50:25	1
2505794	99	34	31,2	cyclictest	2547417	-21	kworker/u8:2+flush-259:0	19:55:25	1
2505792	99	34	28,4	cyclictest	2822712	-21	ntpq	00:10:23	0
2505798	99	33	29,3	cyclictest	2594589	-21	kworker/u8:3+flush-259:0	20:45:23	2
2505794	99	33	30,2	cyclictest	2776150	-21	kworker/u8:1+flush-259:0	23:40:19	1
2505794	99	33	30,2	cyclictest	2734695	-21	kworker/u8:3+events_unbound	23:30:29	1
2505794	99	33	30,2	cyclictest	2604939	-21	kworker/u8:2+flush-259:0	21:55:15	1
2505794	99	33	30,2	cyclictest	2547417	-21	kworker/u8:2+events_unbound	20:00:14	1
2505794	99	33	29,3	cyclictest	2776150	-21	kworker/u8:1+events_unbound	23:50:22	1
2505794	99	33	29,3	cyclictest	2691593	-21	kworker/u8:1+flush-259:0	22:20:24	1
2505794	99	33	29,3	cyclictest	2666673	-21	kworker/u8:4+events_unbound	21:50:13	1
2505794	99	33	26,2	cyclictest	2687397	-21	kworker/u8:0+flush-259:0	22:30:21	1
2505792	99	33	27,4	cyclictest	2818205	-21	cp	00:10:01	0
2505798	99	32	29,2	cyclictest	2760693	-21	kworker/u8:2+flush-259:0	23:25:24	2
2505794	99	32	29,2	cyclictest	2687397	-21	kworker/u8:0+flush-259:0	22:40:21	1
2505794	99	32	29,2	cyclictest	2521833	-21	kworker/u8:1+events_unbound	20:15:24	1
2505798	99	31	27,2	cyclictest	2594589	-21	kworker/u8:3+events_unbound	21:25:15	2
2505794	99	31	29,2	cyclictest	2687397	-21	kworker/u8:0+flush-259:0	22:05:20	1
2505794	99	31	27,3	cyclictest	2818034	-21	kworker/u8:3+events_unbound	00:10:19	1
2505794	99	31	24,3	cyclictest	2594589	-21	kworker/u8:3+flush-259:0	21:15:01	1
2505798	99	30	27,2	cyclictest	2666673	-21	kworker/u8:4+flush-259:0	21:50:21	2
2505798	99	30	25,3	cyclictest	2604939	-21	kworker/u8:2+events_unbound	21:00:13	2
2505794	99	30	27,2	cyclictest	2661510	-21	kworker/u8:1+flush-259:0	21:45:16	1
2505794	99	30	25,2	cyclictest	2724610	-21	kworker/u8:2+flush-259:0	22:45:21	1
2505794	99	30	25,2	cyclictest	2724610	-21	kworker/u8:2+flush-259:0	22:45:21	1
2505792	99	30	25,4	cyclictest	2797182	-21	/usr/sbin/munin	23:50:15	0
2505798	99	29	26,2	cyclictest	2348667	-21	kworker/u8:1+events_unbound	19:10:18	2
2505798	99	29	24,3	cyclictest	2797173	-21	kworker/u8:3+flush-259:0	23:55:24	2
2505794	99	29	26,2	cyclictest	2766188	-21	kworker/u8:0+events_unbound	23:20:26	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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