OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System rack0slot2.osadl.org (updated Tue Apr 28, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
896695	2	59	49,7	sleep5	0	-21	swapper/5	07:05:09	5
897262	99	54	52,2	cyclictest	1139781	-21	kworker/u16:0+events_unbound	10:05:48	5
896741	2	54	43,8	sleep4	0	-21	swapper/4	07:05:49	4
897261	99	49	46,2	cyclictest	1374670	-21	kworker/u16:3+events_unbound	12:09:20	4
1372362	2	48	0,0	sleep7	1372361	-21	rm	10:45:15	7
897272	99	41	0,39	cyclictest	124	-21	kswapd0	11:49:31	7
897267	99	40	38,2	cyclictest	1506312	-21	kworker/u16:2+events_unbound	11:54:39	6
897261	99	40	38,2	cyclictest	1557463	-21	kworker/u16:1+flush-8:0	12:04:39	4
896715	2	40	6,29	sleep7	0	-21	swapper/7	07:05:27	7
897261	99	37	35,2	cyclictest	1139781	-21	kworker/u16:0+flush-8:0	10:32:36	4
897261	99	37	34,2	cyclictest	1139781	-21	kworker/u16:0+events_unbound	10:49:07	4
897272	99	36	35,0	cyclictest	0	-21	swapper/7	12:26:07	7
897272	99	36	35,0	cyclictest	0	-21	swapper/7	08:54:08	7
897272	99	36	34,1	cyclictest	1580612	-21	ssh	12:11:59	7
897272	99	36	33,2	cyclictest	1568507	-21	ssh	12:07:07	7
897272	99	36	33,2	cyclictest	1550541	-21	kthreadcore	11:59:28	7
897272	99	36	33,2	cyclictest	1550541	-21	kthreadcore	11:59:28	7
897272	99	34	33,0	cyclictest	0	-21	swapper/7	10:20:06	7
897272	99	34	33,0	cyclictest	0	-21	swapper/7	10:17:59	7
897272	99	34	33,0	cyclictest	0	-21	swapper/7	09:35:44	7
897272	99	34	32,1	cyclictest	1385244	-21	ssh	10:51:20	7
897261	99	34	31,2	cyclictest	1506312	-21	kworker/u16:2+events_unbound	11:59:07	4
897261	99	34	31,2	cyclictest	1506312	-21	kworker/u16:2+events_unbound	11:59:07	4
897272	99	33	32,0	cyclictest	0	-21	swapper/7	12:22:59	7
897272	99	33	32,0	cyclictest	0	-21	swapper/7	11:13:23	7
897272	99	33	31,1	cyclictest	0	-21	swapper/7	12:16:50	7
897272	99	33	30,1	cyclictest	1130610	-21	diskmemload	11:55:30	7
897262	99	33	31,2	cyclictest	1557463	-21	kworker/u16:1+flush-8:0	12:14:34	5
897261	99	33	31,2	cyclictest	1557463	-21	kworker/u16:1+events_unbound	12:31:35	4
897261	99	33	31,2	cyclictest	1252435	-21	kworker/u16:4+events_unbound	10:47:14	4
897261	99	33	31,2	cyclictest	1111878	-21	kworker/u16:1+flush-8:0	09:19:43	4
897272	99	32	31,0	cyclictest	0	-21	swapper/7	12:37:56	7
897272	99	32	31,0	cyclictest	0	-21	swapper/7	11:32:55	7
897272	99	32	31,0	cyclictest	0	-21	swapper/7	11:16:27	7
897272	99	32	31,0	cyclictest	0	-21	swapper/7	07:09:08	7
897272	99	32	30,1	cyclictest	1130610	-21	diskmemload	10:06:03	7
897272	99	32	29,2	cyclictest	1191531	-21	ssh	09:33:59	7
897261	99	32	30,2	cyclictest	1139781	-21	kworker/u16:0+flush-8:0	10:00:28	4
897272	99	31	30,0	cyclictest	0	-21	swapper/7	11:27:35	7
897272	99	31	30,0	cyclictest	0	-21	swapper/7	11:01:51	7
897272	99	31	30,0	cyclictest	0	-21	swapper/7	10:28:28	7
897272	99	31	30,0	cyclictest	0	-21	swapper/7	09:57:04	7
897272	99	31	30,0	cyclictest	0	-21	swapper/7	09:57:04	7
897267	99	31	28,2	cyclictest	1252435	-21	kworker/u16:4+events_unbound	10:54:14	6
897261	99	31	29,2	cyclictest	1506312	-21	kworker/u16:2+events_unbound	11:52:38	4
897261	99	31	29,2	cyclictest	1411186	-21	kworker/u16:0+events_unbound	11:58:26	4
897261	99	31	29,2	cyclictest	1411186	-21	kworker/u16:0+events_unbound	11:35:16	4
897261	99	31	29,2	cyclictest	1374670	-21	kworker/u16:3+events_unbound	12:19:34	4
897261	99	31	29,2	cyclictest	1252435	-21	kworker/u16:4+events_unbound	10:58:16	4
897261	99	31	29,2	cyclictest	1111878	-21	kworker/u16:1+flush-8:0	09:24:36	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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