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 20, 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
3682270	2	100	0,1	sleep7	3682268	-21	ssh	22:48:23	7
3194331	2	56	46,7	sleep5	0	-21	swapper/5	19:06:33	5
3194333	2	54	20,29	sleep7	0	-21	swapper/7	19:06:35	7
3194698	99	45	41,3	cyclictest	3528076	-21	kworker/u16:4+flush-8:0	22:02:36	6
3194407	2	43	32,8	sleep4	0	-21	swapper/4	19:07:36	4
3194698	99	40	38,2	cyclictest	3696374	-21	kworker/u16:1+events_unbound	23:22:59	6
3194698	99	39	36,2	cyclictest	3696374	-21	kworker/u16:1+events_unbound	23:47:50	6
3194702	99	37	36,0	cyclictest	0	-21	swapper/7	22:32:38	7
3194702	99	36	34,1	cyclictest	3276250	-21	turbostat	19:47:36	7
3194702	99	36	0,34	cyclictest	3443741	-21	latency_hist	21:12:36	7
3194702	99	35	30,3	cyclictest	3826487	-21	users	23:48:10	7
3194398	2	34	24,7	sleep6	0	-21	swapper/6	19:07:30	6
3194702	99	33	32,0	cyclictest	0	-21	swapper/7	21:47:31	7
3194702	99	32	30,1	cyclictest	3431802	-21	diskmemload	23:06:46	7
3194693	99	31	28,2	cyclictest	3344202	-21	kworker/u16:3+flush-8:0	20:22:31	5
3194693	99	31	28,2	cyclictest	3344202	-21	kworker/u16:3+flush-8:0	20:22:31	5
3194698	99	30	28,2	cyclictest	3564208	-21	kworker/u16:3+events_unbound	22:27:50	6
3194702	99	29	28,0	cyclictest	0	-21	swapper/7	21:55:18	7
3194702	99	29	28,0	cyclictest	0	-21	swapper/7	21:21:14	7
3194702	99	29	28,0	cyclictest	0	-21	swapper/7	00:03:00	7
3194698	99	29	27,2	cyclictest	3840171	-21	kworker/u16:2+events_unbound	23:58:06	6
3194693	99	29	25,3	cyclictest	3412349	-21	kworker/u16:2+events_unbound	21:37:49	5
3194702	99	28	27,0	cyclictest	0	-21	swapper/7	22:00:19	7
3194702	99	27	26,0	cyclictest	0	-21	swapper/7	23:45:47	7
3194702	99	27	26,0	cyclictest	0	-21	swapper/7	21:41:14	7
3194702	99	27	26,0	cyclictest	0	-21	swapper/7	19:17:47	7
3194702	99	27	25,1	cyclictest	3900696	-21	ssh	00:22:14	7
3194702	99	27	25,1	cyclictest	3900696	-21	ssh	00:22:14	7
3194702	99	27	25,1	cyclictest	3431802	-21	diskmemload	23:32:34	7
3194698	99	27	25,2	cyclictest	3887613	-21	kworker/u16:2+flush-8:0	00:22:30	6
3194698	99	27	25,2	cyclictest	3887613	-21	kworker/u16:2+flush-8:0	00:22:30	6
3194688	99	27	26,1	cyclictest	3528076	-21	kworker/u16:4+events_unbound	22:59:30	4
3194688	99	27	26,1	cyclictest	3528076	-21	kworker/u16:4+events_unbound	22:59:30	4
3194702	99	26	25,0	cyclictest	0	-21	swapper/7	22:14:46	7
3194702	99	26	24,1	cyclictest	3695283	-21	sh	22:55:22	7
3194702	99	26	23,2	cyclictest	3887519	-21	ssh	00:14:54	7
3194698	99	26	23,2	cyclictest	3184489	-21	kworker/u16:2+events_unbound	20:07:51	6
3194698	99	26	22,3	cyclictest	3717534	-21	kworker/u16:0+flush-8:0	00:22:53	6
3194688	99	26	22,3	cyclictest	3227551	-21	kworker/u16:3+events_unbound	19:27:49	4
3194702	99	25	24,0	cyclictest	0	-21	swapper/7	21:31:43	7
3194702	99	25	23,1	cyclictest	3875507	-21	ssh	00:09:58	7
3194702	99	25	23,1	cyclictest	3431802	-21	diskmemload	00:35:14	7
3194702	99	25	23,1	cyclictest	0	-21	swapper/7	23:40:30	7
3194702	99	25	23,1	cyclictest	0	-21	swapper/7	23:40:30	7
3194702	99	25	23,1	cyclictest	0	-21	swapper/7	21:47:41	7
3194693	99	25	23,2	cyclictest	3696374	-21	kworker/u16:1+events_unbound	22:57:54	5
3194693	99	25	23,2	cyclictest	3696374	-21	kworker/u16:1+events_unbound	22:57:54	5
3194693	99	25	22,2	cyclictest	3817081	-21	kworker/u16:3+flush-8:0	00:12:47	5
3194702	99	24	23,0	cyclictest	0	-21	swapper/7	23:07:41	7
3194702	99	24	23,0	cyclictest	0	-21	swapper/7	22:20:50	7
3194702	99	24	22,1	cyclictest	3623890	-21	ssh	22:26:50	7
3194702	99	24	22,1	cyclictest	3431802	-21	diskmemload	23:34:07	7
3194702	99	24	21,2	cyclictest	3502728	-21	ssh	21:35:14	7
3194693	99	24	22,2	cyclictest	3528076	-21	kworker/u16:4+flush-8:0	23:08:01	5
3194693	99	24	22,2	cyclictest	3422458	-21	kworker/u16:0+events_unbound	21:27:49	5
3194702	99	23	22,0	cyclictest	0	-21	swapper/7	23:27:18	7
3194702	99	23	22,0	cyclictest	0	-21	swapper/7	22:40:46	7
3194702	99	23	20,2	cyclictest	3910705	-21	ssh	00:23:13	7
3194693	99	23	21,2	cyclictest	3887613	-21	kworker/u16:2+flush-8:0	00:37:31	5
3194693	99	23	21,2	cyclictest	3717534	-21	kworker/u16:0+flush-8:0	23:42:58	5
3194693	99	23	20,2	cyclictest	3237485	-21	kworker/u16:4+events_unbound	19:52:54	5
3194688	99	23	19,3	cyclictest	3528076	-21	kworker/u16:4+flush-8:0	22:27:51	4
3194702	99	22	21,0	cyclictest	0	-21	swapper/7	22:59:38	7
3194702	99	22	21,0	cyclictest	0	-21	swapper/7	22:59:38	7
3194702	99	22	21,0	cyclictest	0	-21	swapper/7	22:08:38	7
3194702	99	22	21,0	cyclictest	0	-21	swapper/7	00:29:22	7
3194702	99	22	20,1	cyclictest	3742797	-21	ssh	23:14:10	7
3194693	99	22	20,2	cyclictest	3525285	-21	kworker/u16:1+flush-8:0	21:47:42	5
3194693	99	22	19,2	cyclictest	3184489	-21	kworker/u16:2+flush-8:0	19:27:47	5
3194702	99	21	20,0	cyclictest	0	-21	swapper/7	19:57:39	7
3194702	99	21	19,1	cyclictest	3431802	-21	diskmemload	22:30:23	7
3194702	99	21	19,1	cyclictest	0	-21	swapper/7	23:56:55	7
3194702	99	21	18,2	cyclictest	3574048	-21	ssh	22:03:19	7
3194702	99	21	15,5	cyclictest	648	-21	systemd-journal	20:32:37	7
3194698	99	21	19,2	cyclictest	3275116	-21	kworker/u16:0+flush-8:0	20:12:51	6
3194693	99	21	19,2	cyclictest	3275116	-21	kworker/u16:0+events_unbound	20:02:58	5
3194702	99	20	17,2	cyclictest	3755345	-21	ssh	23:20:08	7
3194698	99	20	18,2	cyclictest	3383869	-21	kworker/u16:4+flush-8:0	20:47:48	6
3194702	99	19	18,0	cyclictest	0	-21	swapper/7	21:26:31	7
3194702	99	19	18,0	cyclictest	0	-21	swapper/7	19:23:06	7
3194702	99	19	14,4	cyclictest	648	-21	systemd-journal	21:02:36	7
3194698	99	19	15,3	cyclictest	3354192	-21	kworker/u16:2+flush-8:0	20:28:02	6
3194688	99	19	18,1	cyclictest	3528076	-21	kworker/u16:4+events_unbound	23:18:51	4
3194688	99	19	17,2	cyclictest	3696374	-21	kworker/u16:1+flush-8:0	23:48:12	4
3194702	99	18	14,3	cyclictest	1302	-21	snmpd	21:04:54	7
3194702	99	18	0,16	cyclictest	1302	-21	snmpd	20:30:44	7
3194693	99	18	16,2	cyclictest	3840778	-21	kworker/u16:4+flush-8:0	23:58:12	5
3194693	99	18	16,2	cyclictest	3528076	-21	kworker/u16:4+flush-8:0	23:22:31	5
3194693	99	18	16,2	cyclictest	3491040	-21	kworker/u16:3+events_unbound	21:33:01	5
3194693	99	18	16,2	cyclictest	3199039	-21	kworker/u16:4+events_unbound	19:08:07	5
3194693	99	18	15,2	cyclictest	3528076	-21	kworker/u16:4+flush-8:0	22:13:02	5
3194693	99	18	15,2	cyclictest	3525285	-21	kworker/u16:1+events_unbound	21:52:42	5
3194693	99	18	15,2	cyclictest	3285829	-21	kworker/u16:1+flush-8:0	20:32:51	5
3194693	99	18	14,4	cyclictest	3441480	-21	kworker/u16:1+flush-8:0	21:27:37	5
3194688	99	18	15,2	cyclictest	3503311	-21	kworker/u16:0+flush-8:0	21:42:46	4
3194702	99	17	16,0	cyclictest	0	-21	swapper/7	21:14:31	7
3194702	99	17	16,0	cyclictest	0	-21	swapper/7	19:53:06	7
3194702	99	17	16,0	cyclictest	0	-21	swapper/7	00:01:26	7
3194702	99	17	0,1	cyclictest	0	-21	swapper/7	20:38:00	7
3194698	99	17	15,2	cyclictest	3564208	-21	kworker/u16:3+flush-8:0	22:08:15	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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