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 Tue May 12, 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
2209517	2	52	28,7	sleep5	0	-21	swapper/5	07:07:55	5
2209844	99	47	45,2	cyclictest	2711828	-21	kworker/u16:3+events_unbound	11:08:41	6
2209844	99	43	41,2	cyclictest	2367305	-21	kworker/u16:2+flush-8:0	08:43:37	6
2209846	99	41	38,2	cyclictest	2638007	-21	ssh	10:24:46	7
2209844	99	41	39,2	cyclictest	2762055	-21	kworker/u16:0+events_unbound	11:19:45	6
2200331	2	40	3,31	sleep7	0	-21	swapper/7	07:03:16	7
2209842	99	39	37,2	cyclictest	2517864	-21	kworker/u16:3+events_unbound	10:07:50	5
2209836	99	39	37,2	cyclictest	2711828	-21	kworker/u16:3+events_unbound	10:58:13	4
2209836	99	39	37,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:51:45	4
2209836	99	39	37,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:51:45	4
2209846	99	38	37,0	cyclictest	0	-21	swapper/7	11:46:33	7
2209846	99	38	36,1	cyclictest	0	-21	swapper/7	11:08:35	7
2209836	99	38	36,2	cyclictest	2762055	-21	kworker/u16:0+events_unbound	11:25:37	4
2209846	99	37	36,0	cyclictest	0	-21	swapper/7	10:41:29	7
2209846	99	37	36,0	cyclictest	0	-21	swapper/7	10:31:42	7
2209844	99	37	35,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:34:37	6
2209844	99	37	31,6	cyclictest	2918994	-21	kworker/u16:0+events_unbound	12:19:17	6
2209842	99	37	32,4	cyclictest	2603332	-21	kworker/u16:1+flush-8:0	10:28:09	5
2209846	99	36	35,0	cyclictest	0	-21	swapper/7	12:13:14	7
2209846	99	36	35,0	cyclictest	0	-21	swapper/7	10:17:25	7
2209844	99	36	34,2	cyclictest	2933415	-21	kworker/u16:1+events_unbound	12:32:37	6
2209844	99	36	34,2	cyclictest	2872432	-21	kworker/u16:3+events_unbound	12:15:33	6
2209844	99	36	34,2	cyclictest	2799135	-21	kworker/u16:4+events_unbound	11:41:05	6
2209844	99	36	34,2	cyclictest	2786409	-21	kworker/u16:3+events_unbound	11:30:18	6
2209844	99	36	34,2	cyclictest	2517864	-21	kworker/u16:3+events_unbound	09:56:18	6
2209844	99	36	34,2	cyclictest	2453115	-21	kworker/u16:4+events_unbound	09:09:18	6
2209844	99	36	34,2	cyclictest	2453115	-21	kworker/u16:4+events_unbound	09:09:18	6
2209844	99	36	34,2	cyclictest	2395864	-21	kworker/u16:3+events_unbound	09:30:30	6
2209842	99	36	34,2	cyclictest	2480870	-21	kworker/u16:2+flush-8:0	09:59:10	5
2209836	99	36	34,2	cyclictest	2933415	-21	kworker/u16:1+events_unbound	12:35:17	4
2209836	99	36	34,2	cyclictest	2933415	-21	kworker/u16:1+events_unbound	12:35:17	4
2209836	99	36	34,2	cyclictest	2689340	-21	kworker/u16:4+events_unbound	11:16:06	4
2209836	99	36	34,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:28:57	4
2209836	99	36	34,2	cyclictest	2308620	-21	kworker/u16:1+flush-8:0	07:57:58	4
2209846	99	35	34,0	cyclictest	0	-21	swapper/7	10:50:22	7
2209846	99	35	34,0	cyclictest	0	-21	swapper/7	09:47:34	7
2209846	99	35	34,0	cyclictest	0	-21	swapper/7	09:33:09	7
2209844	99	35	33,2	cyclictest	2799135	-21	kworker/u16:4+events_unbound	12:11:05	6
2209844	99	35	33,2	cyclictest	2799135	-21	kworker/u16:4+events_unbound	11:47:30	6
2209844	99	35	33,2	cyclictest	2762055	-21	kworker/u16:0+events_unbound	11:27:22	6
2209844	99	35	33,2	cyclictest	2624463	-21	kworker/u16:0+events_unbound	10:53:49	6
2209844	99	35	33,2	cyclictest	2624463	-21	kworker/u16:0+events_unbound	10:22:31	6
2209844	99	35	33,2	cyclictest	2603332	-21	kworker/u16:1+events_unbound	10:45:25	6
2209844	99	35	33,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:53:05	6
2209844	99	35	33,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:53:05	6
2209844	99	35	33,2	cyclictest	2466056	-21	kworker/u16:0+events_unbound	09:41:58	6
2209844	99	35	33,2	cyclictest	2453115	-21	kworker/u16:4+events_unbound	09:19:14	6
2209842	99	35	33,2	cyclictest	2689340	-21	kworker/u16:4+flush-8:0	11:07:49	5
2209842	99	35	33,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:48:06	5
2209836	99	35	33,2	cyclictest	2703257	-21	kworker/u16:2+events_unbound	11:04:17	4
2209836	99	35	33,2	cyclictest	2689340	-21	kworker/u16:4+events_unbound	10:51:09	4
2209836	99	35	33,2	cyclictest	2603332	-21	kworker/u16:1+events_unbound	10:46:49	4
2209836	99	35	33,2	cyclictest	2603332	-21	kworker/u16:1+events_unbound	10:24:29	4
2209836	99	35	33,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:44:50	4
2209493	2	35	25,7	sleep4	0	-21	swapper/4	07:07:38	4
2209846	99	34	33,0	cyclictest	0	-21	swapper/7	10:36:49	7
2209846	99	34	33,0	cyclictest	0	-21	swapper/7	10:02:49	7
2209844	99	34	32,2	cyclictest	2703257	-21	kworker/u16:2+events_unbound	11:04:58	6
2209844	99	34	32,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:47:42	6
2209844	99	34	32,2	cyclictest	2466056	-21	kworker/u16:0+events_unbound	09:24:41	6
2209842	99	34	32,2	cyclictest	2764327	-21	kworker/u16:1+events_unbound	12:01:30	5
2209842	99	34	32,2	cyclictest	2603332	-21	kworker/u16:1+events_unbound	10:49:37	5
2209836	99	34	32,2	cyclictest	2872432	-21	kworker/u16:3+events_unbound	12:06:33	4
2209836	99	34	32,2	cyclictest	2517864	-21	kworker/u16:3+flush-8:0	10:14:45	4
2209836	99	34	32,2	cyclictest	2517864	-21	kworker/u16:3+flush-8:0	10:10:29	4
2209836	99	34	32,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	09:55:57	4
2209836	99	34	32,2	cyclictest	2453115	-21	kworker/u16:4+events_unbound	09:21:33	4
2209846	99	33	32,0	cyclictest	0	-21	swapper/7	09:14:33	7
2209846	99	33	31,1	cyclictest	0	-21	swapper/7	09:24:13	7
2209844	99	33	31,2	cyclictest	2624463	-21	kworker/u16:0+events_unbound	10:37:34	6
2209844	99	33	31,2	cyclictest	2603332	-21	kworker/u16:1+flush-8:0	10:24:49	6
2209844	99	33	31,2	cyclictest	2480870	-21	kworker/u16:2+events_unbound	10:07:54	6
2209842	99	33	31,2	cyclictest	2762055	-21	kworker/u16:0+events_unbound	11:18:58	5
2209842	99	33	31,2	cyclictest	2689340	-21	kworker/u16:4+events_unbound	11:08:37	5
2209842	99	33	30,3	cyclictest	2357369	-21	kworker/u16:1+flush-8:0	08:23:10	5
2209836	99	33	31,2	cyclictest	2799135	-21	kworker/u16:4+events_unbound	12:27:40	4
2209836	99	33	31,2	cyclictest	2799135	-21	kworker/u16:4+events_unbound	12:11:17	4
2209836	99	33	31,2	cyclictest	2799135	-21	kworker/u16:4+events_unbound	11:40:44	4
2209836	99	33	31,2	cyclictest	2764327	-21	kworker/u16:1+events_unbound	11:49:29	4
2209846	99	32	31,0	cyclictest	0	-21	swapper/7	12:02:21	7
2209846	99	32	31,0	cyclictest	0	-21	swapper/7	11:32:25	7
2209846	99	32	31,0	cyclictest	0	-21	swapper/7	11:26:22	7
2209846	99	32	31,0	cyclictest	0	-21	swapper/7	11:05:45	7
2209844	99	32	30,2	cyclictest	2946131	-21	kworker/u16:0+events_unbound	12:35:09	6
2209844	99	32	30,2	cyclictest	2946131	-21	kworker/u16:0+events_unbound	12:35:09	6
2209844	99	32	30,2	cyclictest	2859215	-21	kworker/u16:2+events_unbound	12:00:22	6
2209844	99	32	30,2	cyclictest	2703257	-21	kworker/u16:2+flush-8:0	10:59:01	6
2209844	99	32	30,2	cyclictest	2517864	-21	kworker/u16:3+events_unbound	10:14:21	6
2209844	99	32	29,2	cyclictest	2859215	-21	kworker/u16:2+flush-8:0	12:03:22	6
2209842	99	32	31,1	cyclictest	2859215	-21	kworker/u16:2+events_unbound	12:05:09	5
2209842	99	32	30,2	cyclictest	2799135	-21	kworker/u16:4+events_unbound	11:57:52	5
2209842	99	32	27,2	cyclictest	2480870	-21	kworker/u16:2+flush-8:0	10:08:15	5
2209836	99	32	30,2	cyclictest	2799135	-21	kworker/u16:4+events_unbound	11:56:29	4
2209836	99	32	30,2	cyclictest	2576195	-21	kworker/u16:1+events_unbound	10:00:22	4
2209836	99	32	30,2	cyclictest	2395864	-21	kworker/u16:3+events_unbound	09:23:11	4
2209279	2	32	10,7	sleep6	0	-21	swapper/6	07:04:36	6
2209846	99	31	30,0	cyclictest	0	-21	swapper/7	12:37:22	7
2209846	99	31	30,0	cyclictest	0	-21	swapper/7	12:37:22	7
2209846	99	31	30,0	cyclictest	0	-21	swapper/7	11:54:25	7
2209846	99	31	30,0	cyclictest	0	-21	swapper/7	10:07:05	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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