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 Sun Nov 02, 2025 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2228344	2	59	49,7	sleep6	0	-21	swapper/6	15:21:23	6
2228588	2	57	46,7	sleep4	0	-21	swapper/4	15:24:42	4
2228901	99	53	49,3	cyclictest	2218505	-21	kworker/u16:3+flush-8:0	16:14:51	5
2228901	99	52	49,2	cyclictest	2394308	-21	kworker/u16:3+flush-8:0	16:44:51	5
2228906	99	47	42,4	cyclictest	2677113	-21	latency_hist	19:04:50	7
2228901	99	47	45,2	cyclictest	2354396	-21	kworker/u16:5+events_unbound	17:20:06	5
2228901	99	45	43,2	cyclictest	2808198	-21	kworker/u16:3+events_unbound	20:18:54	5
2228901	99	45	42,2	cyclictest	2565952	-21	kworker/u16:3+flush-8:0	18:14:54	5
2228899	99	45	43,2	cyclictest	2354396	-21	kworker/u16:5+flush-8:0	16:30:21	4
2228899	99	44	41,2	cyclictest	2424371	-21	kworker/u16:0+flush-8:0	17:10:17	4
2228901	99	43	41,2	cyclictest	2444900	-21	kworker/u16:4+flush-8:0	17:30:20	5
2228906	99	41	40,0	cyclictest	0	-21	swapper/7	18:40:06	7
2228906	99	41	0,39	cyclictest	2858914	-21	latency_hist	20:34:50	7
2228901	99	41	38,2	cyclictest	2444900	-21	kworker/u16:4+flush-8:0	18:05:14	5
2228899	99	41	38,3	cyclictest	2343770	-21	kworker/u16:1+flush-8:0	16:40:19	4
2228899	99	40	38,2	cyclictest	2525376	-21	kworker/u16:1+events_unbound	19:06:33	4
2227479	2	40	3,31	sleep7	0	-21	swapper/7	15:20:20	7
27655	89	39	0,32	rtkit-daemon	0	-21	swapper/5	15:20:22	5
2228901	99	39	37,2	cyclictest	2787409	-21	kworker/u16:5+events_unbound	20:27:31	5
2228901	99	39	35,3	cyclictest	2252811	-21	kworker/u16:4+flush-8:0	15:31:43	5
2228899	99	38	36,2	cyclictest	2218505	-21	kworker/u16:3+flush-8:0	16:13:32	4
2228906	99	37	32,4	cyclictest	2788174	-21	latency_hist	19:59:51	7
2228901	99	37	35,2	cyclictest	2444900	-21	kworker/u16:4+events_unbound	17:53:22	5
2228901	99	37	35,2	cyclictest	2273336	-21	kworker/u16:1+events_unbound	16:04:31	5
2228899	99	37	35,2	cyclictest	2787409	-21	kworker/u16:5+flush-8:0	20:04:31	4
2228899	99	37	35,2	cyclictest	2323472	-21	kworker/u16:0+events_unbound	16:22:33	4
2228901	99	36	34,2	cyclictest	2394308	-21	kworker/u16:3+events_unbound	17:00:26	5
2228899	99	36	34,2	cyclictest	2475178	-21	kworker/u16:1+events_unbound	17:28:31	4
2228901	99	35	33,2	cyclictest	2738890	-21	kworker/u16:0+events_unbound	20:05:15	5
2228901	99	35	32,2	cyclictest	2343770	-21	kworker/u16:1+events_unbound	16:30:18	5
2228899	99	35	33,2	cyclictest	2738890	-21	kworker/u16:0+events_unbound	19:48:32	4
2228899	99	35	33,2	cyclictest	2384159	-21	kworker/u16:2+events_unbound	17:18:31	4
2228899	99	35	32,2	cyclictest	2424371	-21	kworker/u16:0+events_unbound	17:20:18	4
2228901	99	34	32,2	cyclictest	2616376	-21	kworker/u16:3+events_unbound	18:32:31	5
2228901	99	34	31,2	cyclictest	2384159	-21	kworker/u16:2+events_unbound	17:39:31	5
2228899	99	34	32,2	cyclictest	2702124	-21	kworker/u16:2+events_unbound	19:58:59	4
2228899	99	34	32,2	cyclictest	2323472	-21	kworker/u16:0+flush-8:0	16:16:31	4
2228901	99	33	31,2	cyclictest	2768388	-21	kworker/u16:1+flush-8:0	19:53:31	5
2228899	99	33	31,2	cyclictest	2808198	-21	kworker/u16:3+flush-8:0	20:15:16	4
2228899	99	33	31,2	cyclictest	2702124	-21	kworker/u16:2+events_unbound	19:43:10	4
2228899	99	33	31,2	cyclictest	2505401	-21	kworker/u16:0+events_unbound	18:05:31	4
2228906	99	32	0,30	cyclictest	2616595	-21	latency_hist	18:34:51	7
2228905	99	32	30,2	cyclictest	2354396	-21	kworker/u16:5+events_unbound	16:45:19	6
2228901	99	32	30,2	cyclictest	2616382	-21	kworker/u16:5+flush-8:0	19:14:45	5
2228899	99	32	30,2	cyclictest	2808198	-21	kworker/u16:3+events_unbound	20:54:00	4
2228899	99	32	30,2	cyclictest	2616382	-21	kworker/u16:5+flush-8:0	19:17:51	4
2228899	99	32	30,2	cyclictest	2616382	-21	kworker/u16:5+flush-8:0	18:56:10	4
2228899	99	32	30,2	cyclictest	2616382	-21	kworker/u16:5+events_unbound	18:53:14	4
2228899	99	32	30,2	cyclictest	2238601	-21	kworker/u16:2+events_unbound	15:31:27	4
2228901	99	31	29,2	cyclictest	2787409	-21	kworker/u16:5+events_unbound	20:03:53	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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