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 Mon Mar 30, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
751801	2	58	48,7	sleep6	0	-21	swapper/6	06:58:51	6
751941	2	56	46,7	sleep5	0	-21	swapper/5	07:00:50	5
751893	2	49	39,7	sleep4	0	-21	swapper/4	07:00:09	4
752364	99	47	45,2	cyclictest	1068085	-21	kworker/u16:3+events_unbound	09:38:14	6
752364	99	46	44,2	cyclictest	1068085	-21	kworker/u16:3+events_unbound	09:42:49	6
752364	99	45	43,2	cyclictest	1068085	-21	kworker/u16:3+events_unbound	09:56:09	6
752366	99	44	36,7	cyclictest	1213678	-21	latency_hist	10:37:47	7
751934	2	44	10,30	sleep7	0	-21	swapper/7	07:00:44	7
752364	99	43	41,2	cyclictest	1238178	-21	kworker/u16:1+events_unbound	11:35:41	6
752364	99	43	41,2	cyclictest	1238178	-21	kworker/u16:1+events_unbound	11:35:41	6
752359	99	43	40,2	cyclictest	1018779	-21	kworker/u16:0+flush-8:0	09:57:47	5
752364	99	42	40,2	cyclictest	1334126	-21	kworker/u16:2+events_unbound	12:25:41	6
752364	99	42	40,2	cyclictest	1334126	-21	kworker/u16:2+events_unbound	11:51:50	6
752364	99	42	40,2	cyclictest	1146817	-21	kworker/u16:3+events_unbound	10:38:41	6
752364	99	42	40,2	cyclictest	1146817	-21	kworker/u16:3+events_unbound	10:36:26	6
752364	99	41	39,2	cyclictest	1394361	-21	kworker/u16:0+events_unbound	12:15:58	6
752364	99	41	39,2	cyclictest	1394361	-21	kworker/u16:0+events_unbound	12:15:58	6
752364	99	41	39,2	cyclictest	1238178	-21	kworker/u16:1+events_unbound	12:32:08	6
752364	99	41	39,2	cyclictest	1238178	-21	kworker/u16:1+events_unbound	10:52:32	6
752364	99	41	39,2	cyclictest	1165646	-21	kworker/u16:4+events_unbound	10:27:13	6
752364	99	41	39,2	cyclictest	1146817	-21	kworker/u16:3+events_unbound	10:53:56	6
752364	99	41	39,2	cyclictest	1129858	-21	kworker/u16:1+events_unbound	10:05:14	6
752364	99	41	38,2	cyclictest	1238178	-21	kworker/u16:1+events_unbound	11:43:01	6
752359	99	41	39,2	cyclictest	1018779	-21	kworker/u16:0+flush-8:0	11:02:46	5
889644	2	40	0,0	sleep7	889646	-21	date	08:12:47	7
752366	99	40	35,4	cyclictest	650	-21	systemd-journal	09:22:42	7
752364	99	40	38,2	cyclictest	1334126	-21	kworker/u16:2+events_unbound	12:09:53	6
752364	99	40	38,2	cyclictest	1334126	-21	kworker/u16:2+events_unbound	12:00:52	6
752364	99	40	38,2	cyclictest	1334126	-21	kworker/u16:2+events_unbound	11:29:26	6
752364	99	40	38,2	cyclictest	1146817	-21	kworker/u16:3+events_unbound	11:25:53	6
752364	99	39	37,2	cyclictest	1238178	-21	kworker/u16:1+events_unbound	11:03:52	6
752364	99	39	37,2	cyclictest	1146817	-21	kworker/u16:3+events_unbound	11:11:41	6
752364	99	39	37,2	cyclictest	1018779	-21	kworker/u16:0+events_unbound	10:45:10	6
752364	99	39	37,2	cyclictest	1018779	-21	kworker/u16:0+events_unbound	09:24:21	6
752355	99	39	37,2	cyclictest	1018779	-21	kworker/u16:0+events_unbound	09:53:01	4
752364	99	38	36,2	cyclictest	985490	-21	kworker/u16:4+events_unbound	09:17:29	6
752364	99	38	36,2	cyclictest	1334126	-21	kworker/u16:2+events_unbound	12:03:53	6
752364	99	38	36,2	cyclictest	1238178	-21	kworker/u16:1+events_unbound	10:59:30	6
752364	99	38	36,2	cyclictest	1068085	-21	kworker/u16:3+events_unbound	09:50:13	6
752364	99	38	36,2	cyclictest	1018779	-21	kworker/u16:0+events_unbound	10:17:29	6
752364	99	38	36,2	cyclictest	1018779	-21	kworker/u16:0+events_unbound	10:17:29	6
752364	99	37	35,2	cyclictest	985490	-21	kworker/u16:4+events_unbound	09:05:53	6
752364	99	37	35,2	cyclictest	784789	-21	kworker/u16:3+flush-8:0	08:48:11	6
752364	99	37	35,2	cyclictest	1238178	-21	kworker/u16:1+events_unbound	11:41:05	6
752364	99	37	35,2	cyclictest	1146817	-21	kworker/u16:3+events_unbound	10:21:17	6
752364	99	37	35,2	cyclictest	1018779	-21	kworker/u16:0+flush-8:0	09:28:26	6
752364	99	37	35,2	cyclictest	1018779	-21	kworker/u16:0+events_unbound	11:19:18	6
752364	99	37	35,2	cyclictest	1018779	-21	kworker/u16:0+events_unbound	10:00:29	6
752364	99	37	34,2	cyclictest	742569	-21	kworker/u16:0+events_unbound	07:47:49	6
752359	99	37	33,3	cyclictest	1018779	-21	kworker/u16:0+flush-8:0	11:13:05	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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