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 100 highest latencies:

System rack0slot2.osadl.org (updated Thu Aug 13, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2922450	2	97	0,1	sleep7	2922451	-21	sh	23:23:11	7
2359642	2	56	46,7	sleep4	0	-21	swapper/4	19:05:30	4
2359523	2	54	19,30	sleep7	0	-21	swapper/7	19:03:48	7
2359606	2	41	31,7	sleep5	0	-21	swapper/5	19:04:58	5
2360117	99	38	35,2	cyclictest	2946028	-21	kworker/u16:3+events_unbound	00:33:04	5
2360117	99	36	34,2	cyclictest	2787855	-21	kworker/u16:0+events_unbound	22:31:50	5
2360117	99	34	32,2	cyclictest	2801696	-21	kworker/u16:1+events_unbound	22:40:28	5
2360117	99	34	32,2	cyclictest	2657358	-21	kworker/u16:2+flush-8:0	21:34:41	5
2360117	99	34	31,2	cyclictest	2787855	-21	kworker/u16:0+events_unbound	22:54:44	5
2861586	2	33	0,1	chrt	2861587	-21	sh	22:57:38	7
2360117	99	33	31,2	cyclictest	2946028	-21	kworker/u16:3+events_unbound	00:32:38	5
2360117	99	33	31,2	cyclictest	2657358	-21	kworker/u16:2+events_unbound	21:44:42	5
2360117	99	32	30,2	cyclictest	2910051	-21	kworker/u16:4+events_unbound	23:34:26	5
2360117	99	32	30,2	cyclictest	2910051	-21	kworker/u16:4+events_unbound	00:16:09	5
2360117	99	32	30,2	cyclictest	2801696	-21	kworker/u16:1+events_unbound	23:29:46	5
2360117	99	32	30,2	cyclictest	2681827	-21	kworker/u16:3+events_unbound	22:21:42	5
2360117	99	32	29,2	cyclictest	2528885	-21	kworker/u16:4+flush-8:0	21:53:10	5
2360122	99	31	29,2	cyclictest	3006698	-21	kworker/u16:2+events_unbound	23:58:18	6
2360122	99	31	29,2	cyclictest	2657358	-21	kworker/u16:2+flush-8:0	21:43:18	6
2360122	99	31	29,2	cyclictest	2369668	-21	kworker/u16:1+events_unbound	19:28:19	6
2360117	99	31	29,2	cyclictest	2946028	-21	kworker/u16:3+events_unbound	00:21:57	5
2360117	99	31	29,2	cyclictest	2910051	-21	kworker/u16:4+events_unbound	23:56:00	5
2360117	99	31	29,2	cyclictest	2681827	-21	kworker/u16:3+events_unbound	21:52:33	5
2360117	99	31	29,2	cyclictest	2657358	-21	kworker/u16:2+events_unbound	22:01:42	5
2360117	99	31	29,2	cyclictest	2657358	-21	kworker/u16:2+events_unbound	21:39:10	5
2360117	99	31	29,2	cyclictest	2657358	-21	kworker/u16:2+events_unbound	21:39:10	5
2360117	99	31	29,2	cyclictest	2610909	-21	kworker/u16:1+events_unbound	21:14:42	5
2360117	99	31	29,2	cyclictest	2528885	-21	kworker/u16:4+events_unbound	21:11:58	5
2359797	2	31	21,7	sleep6	0	-21	swapper/6	19:07:40	6
2360130	99	30	28,1	cyclictest	0	-21	swapper/7	19:13:05	7
2360117	99	30	28,2	cyclictest	2946028	-21	kworker/u16:3+events_unbound	00:27:20	5
2360117	99	30	28,2	cyclictest	2801696	-21	kworker/u16:1+flush-8:0	23:20:09	5
2360117	99	30	28,2	cyclictest	2618597	-21	kworker/u16:3+events_unbound	21:26:27	5
2360117	99	30	27,2	cyclictest	2657358	-21	kworker/u16:2+flush-8:0	22:48:04	5
2360117	99	29	27,2	cyclictest	2910051	-21	kworker/u16:4+events_unbound	00:04:57	5
2360117	99	29	27,2	cyclictest	2618597	-21	kworker/u16:3+events_unbound	21:18:56	5
2360117	99	29	27,2	cyclictest	2369668	-21	kworker/u16:1+flush-8:0	19:23:50	5
2360117	99	29	27,2	cyclictest	2369668	-21	kworker/u16:1+events_unbound	20:01:54	5
2360117	99	29	26,2	cyclictest	2402546	-21	kworker/u16:3+events_unbound	19:28:04	5
2360122	99	28	26,2	cyclictest	2967873	-21	kworker/u16:0+flush-8:0	23:53:30	6
2360122	99	28	26,2	cyclictest	2321185	-21	kworker/u16:2+flush-8:0	19:38:18	6
2360122	99	28	25,2	cyclictest	2369668	-21	kworker/u16:1+events_unbound	19:23:30	6
2360117	99	28	26,2	cyclictest	2967873	-21	kworker/u16:0+flush-8:0	23:49:41	5
2360117	99	28	26,2	cyclictest	2872326	-21	kworker/u16:3+flush-8:0	23:04:21	5
2360117	99	28	26,2	cyclictest	2801696	-21	kworker/u16:1+events_unbound	22:34:38	5
2360122	99	27	25,2	cyclictest	2528885	-21	kworker/u16:4+flush-8:0	21:08:33	6
2360122	99	27	25,2	cyclictest	2369668	-21	kworker/u16:1+events_unbound	20:08:19	6
2360117	99	27	25,2	cyclictest	2910051	-21	kworker/u16:4+events_unbound	00:02:32	5
2360117	99	27	25,2	cyclictest	2886130	-21	kworker/u16:2+events_unbound	23:25:56	5
2360117	99	27	25,2	cyclictest	2886130	-21	kworker/u16:2+events_unbound	23:16:33	5
2360117	99	27	25,2	cyclictest	2528885	-21	kworker/u16:4+events_unbound	20:37:26	5
2360130	99	26	24,1	cyclictest	2810989	-21	sh	22:33:29	7
2360122	99	26	24,2	cyclictest	2886130	-21	kworker/u16:2+events_unbound	23:18:26	6
2360122	99	26	24,2	cyclictest	2886130	-21	kworker/u16:2+events_unbound	23:08:17	6
2360117	99	26	24,2	cyclictest	3030540	-21	kworker/u16:0+events_unbound	00:09:09	5
2360117	99	26	24,2	cyclictest	2946028	-21	kworker/u16:3+events_unbound	23:39:56	5
2360117	99	26	24,2	cyclictest	2787855	-21	kworker/u16:0+events_unbound	23:10:37	5
2360117	99	26	24,2	cyclictest	2681827	-21	kworker/u16:3+flush-8:0	22:24:16	5
2360117	99	26	24,2	cyclictest	2618597	-21	kworker/u16:3+events_unbound	21:32:47	5
2360117	99	26	24,2	cyclictest	2577002	-21	kworker/u16:2+events_unbound	20:55:45	5
2360117	99	26	24,2	cyclictest	2499984	-21	kworker/u16:3+events_unbound	20:38:13	5
2360122	99	25	23,2	cyclictest	2499984	-21	kworker/u16:3+events_unbound	20:33:18	6
2360122	99	25	23,2	cyclictest	2481058	-21	kworker/u16:2+events_unbound	20:18:17	6
2360117	99	25	23,2	cyclictest	2801696	-21	kworker/u16:1+events_unbound	23:01:48	5
2360117	99	25	23,2	cyclictest	2681827	-21	kworker/u16:3+events_unbound	22:10:47	5
2360117	99	25	23,2	cyclictest	2681827	-21	kworker/u16:3+events_unbound	22:07:16	5
2360117	99	25	23,2	cyclictest	2657358	-21	kworker/u16:2+events_unbound	22:14:20	5
2360117	99	25	23,2	cyclictest	2430515	-21	kworker/u16:0+flush-8:0	20:43:09	5
2360117	99	25	23,2	cyclictest	2321185	-21	kworker/u16:2+events_unbound	19:18:25	5
2360122	99	24	22,2	cyclictest	2946028	-21	kworker/u16:3+flush-8:0	00:13:19	6
2360122	99	24	22,2	cyclictest	2657358	-21	kworker/u16:2+events_unbound	22:28:03	6
2360122	99	24	20,3	cyclictest	2946028	-21	kworker/u16:3+events_unbound	00:33:25	6
2360122	99	24	20,3	cyclictest	2430515	-21	kworker/u16:0+flush-8:0	20:38:29	6
2360117	99	24	22,2	cyclictest	2657358	-21	kworker/u16:2+events_unbound	22:44:24	5
2360117	99	24	22,2	cyclictest	2577002	-21	kworker/u16:2+events_unbound	21:00:26	5
2360130	99	23	22,0	cyclictest	0	-21	swapper/7	21:23:37	7
2360130	99	23	22,0	cyclictest	0	-21	swapper/7	20:38:17	7
2360130	99	23	22,0	cyclictest	0	-21	swapper/7	19:26:21	7
2360130	99	23	21,1	cyclictest	2728985	-21	ssh	22:02:00	7
2360130	99	23	20,2	cyclictest	125	-21	kswapd0	21:53:29	7
2360122	99	23	21,2	cyclictest	2946028	-21	kworker/u16:3+flush-8:0	23:52:58	6
2360117	99	23	21,2	cyclictest	2910051	-21	kworker/u16:4+events_unbound	23:45:48	5
2360117	99	23	21,2	cyclictest	2577002	-21	kworker/u16:2+events_unbound	21:05:45	5
2360117	99	23	21,2	cyclictest	2481058	-21	kworker/u16:2+flush-8:0	20:08:50	5
2360117	99	23	21,2	cyclictest	2481058	-21	kworker/u16:2+events_unbound	20:26:34	5
2360117	99	23	21,2	cyclictest	2369668	-21	kworker/u16:1+events_unbound	19:35:53	5
2360117	99	23	21,2	cyclictest	2369668	-21	kworker/u16:1+events_unbound	19:35:53	5
2360117	99	23	21,2	cyclictest	2369668	-21	kworker/u16:1+events_unbound	19:15:53	5
2360117	99	23	21,2	cyclictest	2321185	-21	kworker/u16:2+events_unbound	19:42:49	5
2360117	99	23	21,2	cyclictest	2286420	-21	kworker/u16:0+events_unbound	19:09:10	5
2528713	2	22	0,0	chrt	0	-21	swapper/5	20:33:03	5
2360130	99	22	21,0	cyclictest	0	-21	swapper/7	22:44:40	7
2360130	99	22	20,1	cyclictest	2596715	-21	diskmemload	23:21:01	7
2360122	99	22	20,2	cyclictest	3078876	-21	kworker/u16:0+flush-8:0	00:31:32	6
2360122	99	22	20,2	cyclictest	2801696	-21	kworker/u16:1+events_unbound	23:33:17	6
2360122	99	22	19,2	cyclictest	2538801	-21	kworker/u16:1+flush-8:0	20:53:04	6
2360117	99	22	20,2	cyclictest	2499984	-21	kworker/u16:3+events_unbound	20:20:26	5
2360117	99	22	20,2	cyclictest	2441750	-21	kworker/u16:3+events_unbound	19:50:30	5
2360130	99	21	20,0	cyclictest	0	-21	swapper/7	23:02:14	7
2360130	99	21	20,0	cyclictest	0	-21	swapper/7	19:56:33	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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