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 Sat Jan 03, 2026 00:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3348885	2	55	0,2	sleep4	63	1	rcuc/4	22:08:52	4
2988356	2	50	39,8	sleep4	0	-21	swapper/4	19:05:52	4
2988856	99	49	43,5	cyclictest	3099092	-21	latency_hist	20:03:34	7
2988492	2	43	33,7	sleep6	0	-21	swapper/6	19:07:47	6
2988856	99	42	36,5	cyclictest	650	-21	systemd-journal	23:03:33	7
2988466	2	40	5,30	sleep7	0	-21	swapper/7	19:07:24	7
2988396	2	38	27,7	sleep5	0	-21	swapper/5	19:06:26	5
2988852	99	36	34,2	cyclictest	2915730	-21	kworker/u16:4+flush-8:0	21:43:49	6
2988856	99	35	29,5	cyclictest	3166984	-21	latency_hist	20:38:34	7
2988856	99	32	30,1	cyclictest	3458292	-21	latency_hist	23:08:33	7
2988856	99	32	26,5	cyclictest	3157276	-21	latency_hist	20:33:35	7
2988850	99	31	29,2	cyclictest	3564595	-21	kworker/u16:2+flush-8:0	00:13:28	5
2988856	99	30	0,28	cyclictest	902	-21	dbus-daemon	19:13:34	7
2988850	99	28	26,2	cyclictest	3167369	-21	kworker/u16:0+events_unbound	21:08:35	5
2988850	99	28	26,2	cyclictest	2998438	-21	kworker/u16:3+events_unbound	19:59:26	5
2988850	99	27	25,2	cyclictest	3564595	-21	kworker/u16:2+events_unbound	00:19:25	5
2988850	99	27	25,2	cyclictest	3292126	-21	kworker/u16:0+events_unbound	22:25:25	5
2988850	99	27	25,2	cyclictest	3292126	-21	kworker/u16:0+events_unbound	22:25:25	5
2988850	99	27	25,2	cyclictest	2940988	-21	kworker/u16:2+events_unbound	19:25:45	5
2988856	99	26	24,1	cyclictest	0	-21	swapper/7	22:08:49	7
2988852	99	26	24,2	cyclictest	3613716	-21	kworker/u16:0+flush-8:0	00:33:57	6
2988850	99	26	24,2	cyclictest	3167369	-21	kworker/u16:0+flush-8:0	21:20:13	5
2988850	99	25	23,2	cyclictest	3409727	-21	kworker/u16:0+events_unbound	22:45:29	5
2988850	99	25	23,2	cyclictest	2998438	-21	kworker/u16:3+events_unbound	19:47:46	5
2988850	99	25	23,2	cyclictest	2915730	-21	kworker/u16:4+events_unbound	20:04:46	5
2988850	99	24	22,2	cyclictest	3574871	-21	kworker/u16:0+events_unbound	00:16:50	5
2988850	99	24	22,2	cyclictest	3380661	-21	kworker/u16:1+events_unbound	22:37:45	5
2988850	99	24	22,2	cyclictest	3312700	-21	kworker/u16:3+events_unbound	22:10:45	5
2988850	99	24	22,2	cyclictest	3312700	-21	kworker/u16:3+events_unbound	21:56:14	5
2988850	99	24	22,2	cyclictest	3108970	-21	kworker/u16:1+events_unbound	20:15:45	5
2988850	99	24	22,2	cyclictest	2940988	-21	kworker/u16:2+events_unbound	19:28:58	5
2988850	99	24	22,2	cyclictest	2915730	-21	kworker/u16:4+events_unbound	19:19:47	5
2988850	99	24	21,2	cyclictest	3466774	-21	kworker/u16:4+flush-8:0	23:48:38	5
2988850	99	24	21,2	cyclictest	3292126	-21	kworker/u16:0+events_unbound	22:28:36	5
2988852	99	23	21,2	cyclictest	3380661	-21	kworker/u16:1+events_unbound	23:34:53	6
2988852	99	23	20,2	cyclictest	2998438	-21	kworker/u16:3+flush-8:0	19:48:35	6
2988850	99	23	21,2	cyclictest	3439210	-21	kworker/u16:3+events_unbound	23:15:34	5
2988850	99	23	21,2	cyclictest	3439210	-21	kworker/u16:3+events_unbound	23:15:34	5
2988850	99	23	21,2	cyclictest	3428817	-21	kworker/u16:2+events_unbound	22:57:45	5
2988850	99	23	21,2	cyclictest	3331647	-21	kworker/u16:6+events_unbound	21:59:35	5
2988850	99	23	21,2	cyclictest	3311731	-21	kworker/u16:2+flush-8:0	22:04:09	5
2988850	99	23	21,2	cyclictest	3141912	-21	kworker/u16:2+events_unbound	20:53:30	5
2988850	99	23	21,2	cyclictest	3141912	-21	kworker/u16:2+events_unbound	20:53:30	5
2988850	99	23	20,2	cyclictest	3292126	-21	kworker/u16:0+flush-8:0	21:44:05	5
2988850	99	23	20,2	cyclictest	2915730	-21	kworker/u16:4+flush-8:0	21:48:44	5
2988852	99	22	20,2	cyclictest	3380662	-21	kworker/u16:3+events_unbound	22:48:34	6
2988852	99	22	20,2	cyclictest	2915730	-21	kworker/u16:4+events_unbound	21:38:34	6
2988850	99	22	20,2	cyclictest	3589882	-21	kworker/u16:3+events_unbound	00:28:18	5
2988850	99	22	20,2	cyclictest	3564595	-21	kworker/u16:2+events_unbound	00:06:46	5
2988850	99	22	20,2	cyclictest	3564595	-21	kworker/u16:2+events_unbound	00:00:45	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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