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 Mon Apr 13, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2343098	2	99	0,1	sleep7	2343099	-21	ssh	09:14:28	7
2074495	2	58	36,7	sleep6	0	-21	swapper/6	06:58:54	6
2074995	99	54	51,2	cyclictest	2646248	-21	kworker/u16:2+flush-8:0	12:26:51	5
2074521	2	53	42,7	sleep5	0	-21	swapper/5	06:59:17	5
2074991	99	49	47,2	cyclictest	2393197	-21	kworker/u16:0+flush-8:0	10:02:05	4
2075001	99	47	42,4	cyclictest	2356454	-21	latency_hist	09:21:51	7
2074558	2	47	36,7	sleep4	0	-21	swapper/4	06:59:49	4
2075000	99	45	42,3	cyclictest	2002714	-21	kworker/u16:1+flush-8:0	07:24:05	6
2074995	99	44	41,2	cyclictest	2289113	-21	kworker/u16:1+flush-8:0	09:41:51	5
2075000	99	42	40,2	cyclictest	2332463	-21	kworker/u16:3+events_unbound	09:22:14	6
2075000	99	42	40,2	cyclictest	2332463	-21	kworker/u16:3+events_unbound	09:22:14	6
2075001	99	41	35,4	cyclictest	2658320	-21	latency_hist	11:26:50	7
2075001	99	40	34,5	cyclictest	2320273	-21	latency_hist	09:06:51	7
2074995	99	40	36,3	cyclictest	2440259	-21	kworker/u16:2+flush-8:0	10:32:09	5
2075001	99	39	37,1	cyclictest	2308216	-21	diskmemload	12:16:04	7
2074580	2	39	4,31	sleep7	0	-21	swapper/7	07:00:08	7
2075001	99	37	35,1	cyclictest	0	-21	swapper/7	09:31:37	7
2075001	99	36	34,1	cyclictest	2667894	-21	ssh	11:27:25	7
2075001	99	36	34,1	cyclictest	2667894	-21	ssh	11:27:25	7
2074991	99	36	34,2	cyclictest	2477475	-21	kworker/u16:0+events_unbound	11:17:05	4
2075001	99	35	27,2	cyclictest	2789068	-21	ssh	12:18:43	7
2075000	99	35	32,2	cyclictest	2440259	-21	kworker/u16:2+flush-8:0	09:56:51	6
2075000	99	35	32,2	cyclictest	2308641	-21	kworker/u16:2+flush-8:0	09:07:11	6
2075001	99	34	0,33	cyclictest	6184	-21	gvfs-afc-volume	12:00:36	7
2075001	99	33	32,0	cyclictest	0	-21	swapper/7	10:24:09	7
2075001	99	33	31,1	cyclictest	2476950	-21	ssh	10:11:04	7
2075001	99	33	30,2	cyclictest	2501279	-21	ssh	10:21:23	7
2075000	99	33	30,2	cyclictest	2393197	-21	kworker/u16:0+flush-8:0	09:51:46	6
2075001	99	32	31,0	cyclictest	0	-21	swapper/7	10:37:25	7
2075001	99	32	31,0	cyclictest	0	-21	swapper/7	10:37:25	7
2074995	99	32	30,2	cyclictest	1341679	-21	kworker/u16:0+events_unbound	07:07:06	5
2075001	99	31	29,1	cyclictest	0	-21	swapper/7	07:42:17	7
2075001	99	30	30,0	cyclictest	0	-21	swapper/7	10:36:12	7
2075001	99	30	0,28	cyclictest	2402551	-21	sh	09:37:35	7
2074995	99	30	29,1	cyclictest	2646248	-21	kworker/u16:2+events_unbound	12:12:41	5
2074995	99	30	28,2	cyclictest	2778683	-21	kworker/u16:0+events_unbound	12:27:13	5
2074995	99	30	27,3	cyclictest	2126301	-21	kworker/u16:5+flush-8:0	09:17:17	5
2074991	99	30	28,2	cyclictest	2646248	-21	kworker/u16:2+flush-8:0	11:52:16	4
2074991	99	30	28,2	cyclictest	2550258	-21	kworker/u16:3+flush-8:0	11:36:50	4
2074991	99	30	28,2	cyclictest	2550258	-21	kworker/u16:3+events_unbound	11:37:05	4
2074991	99	30	28,2	cyclictest	2145858	-21	kworker/u16:0+events_unbound	07:37:06	4
2075001	99	29	29,0	cyclictest	0	-21	swapper/7	12:23:20	7
2075001	99	29	29,0	cyclictest	0	-21	swapper/7	10:03:40	7
2075001	99	29	29,0	cyclictest	0	-21	swapper/7	09:09:24	7
2075001	99	29	28,1	cyclictest	0	-21	swapper/7	11:38:27	7
2075001	99	29	25,3	cyclictest	124	-21	kswapd0	11:52:04	7
2074995	99	29	26,2	cyclictest	2719029	-21	kworker/u16:4+flush-8:0	11:56:56	5
2075001	99	28	28,0	cyclictest	0	-21	swapper/7	12:27:35	7
2075001	99	28	28,0	cyclictest	0	-21	swapper/7	09:25:08	7
2075001	99	28	28,0	cyclictest	0	-21	swapper/7	09:25:08	7
2075001	99	28	27,1	cyclictest	0	-21	swapper/7	10:31:47	7
2075001	99	28	27,0	cyclictest	0	-21	swapper/7	11:02:24	7
2075001	99	28	27,0	cyclictest	0	-21	swapper/7	08:56:42	7
2075001	99	28	26,1	cyclictest	0	-21	swapper/7	11:09:36	7
2075001	99	28	23,4	cyclictest	650	-21	systemd-journal	07:56:46	7
2075000	99	28	26,2	cyclictest	2126301	-21	kworker/u16:5+flush-8:0	08:11:51	6
2075000	99	28	25,2	cyclictest	2477475	-21	kworker/u16:0+events_unbound	11:02:08	6
2074991	99	28	26,2	cyclictest	2619669	-21	kworker/u16:1+events_unbound	11:27:05	4
2074991	99	28	26,2	cyclictest	2619669	-21	kworker/u16:1+events_unbound	11:27:05	4
2074991	99	28	26,2	cyclictest	2126301	-21	kworker/u16:5+events_unbound	09:42:55	4
2075001	99	27	27,0	cyclictest	0	-21	swapper/7	09:35:37	7
2075001	99	27	26,0	cyclictest	0	-21	swapper/7	08:16:07	7
2075001	99	27	26,0	cyclictest	0	-21	swapper/7	07:10:27	7
2075001	99	27	0,25	cyclictest	2203014	-21	latency_hist	08:06:51	7
2075000	99	27	25,2	cyclictest	2002714	-21	kworker/u16:1+events_unbound	07:52:09	6
2074995	99	27	25,2	cyclictest	2289113	-21	kworker/u16:1+flush-8:0	10:17:22	5
2074995	99	27	25,2	cyclictest	2126301	-21	kworker/u16:5+flush-8:0	09:32:21	5
2074995	99	27	24,2	cyclictest	2718981	-21	kworker/u16:3+flush-8:0	12:02:07	5
2074991	99	27	25,2	cyclictest	2646248	-21	kworker/u16:2+flush-8:0	11:42:49	4
2075001	99	26	26,0	cyclictest	0	-21	swapper/7	10:45:00	7
2075001	99	26	26,0	cyclictest	0	-21	swapper/7	10:14:48	7
2075001	99	26	25,0	cyclictest	0	-21	swapper/7	09:47:26	7
2075000	99	26	24,2	cyclictest	2145858	-21	kworker/u16:0+events_unbound	08:37:10	6
2074995	99	26	23,2	cyclictest	2289113	-21	kworker/u16:1+events_unbound	09:02:14	5
2075001	99	25	25,0	cyclictest	0	-21	swapper/7	12:10:20	7
2075001	99	25	25,0	cyclictest	0	-21	swapper/7	10:59:04	7
2075001	99	25	24,0	cyclictest	0	-21	swapper/7	07:20:06	7
2075000	99	25	23,2	cyclictest	2719029	-21	kworker/u16:4+flush-8:0	11:57:08	6
2075000	99	25	23,2	cyclictest	2145858	-21	kworker/u16:0+events_unbound	07:37:10	6
2074995	99	25	23,2	cyclictest	2477475	-21	kworker/u16:0+flush-8:0	10:57:06	5
2074995	99	25	22,2	cyclictest	2477475	-21	kworker/u16:0+flush-8:0	10:37:16	5
2074995	99	25	22,2	cyclictest	2477475	-21	kworker/u16:0+flush-8:0	10:37:16	5
2074991	99	25	23,2	cyclictest	2778683	-21	kworker/u16:0+flush-8:0	12:17:15	4
2074991	99	25	23,2	cyclictest	2145858	-21	kworker/u16:0+events_unbound	08:52:03	4
2074991	99	25	23,2	cyclictest	2046327	-21	kworker/u16:3+flush-8:0	07:23:57	4
2075001	99	24	23,0	cyclictest	0	-21	swapper/7	08:39:03	7
2075001	99	24	23,0	cyclictest	0	-21	swapper/7	08:35:47	7
2075001	99	24	23,0	cyclictest	0	-21	swapper/7	07:59:26	7
2075001	99	24	23,0	cyclictest	0	-21	swapper/7	07:28:06	7
2075000	99	24	22,2	cyclictest	2046327	-21	kworker/u16:3+events_unbound	07:12:11	6
2074995	99	24	22,2	cyclictest	2145858	-21	kworker/u16:0+events_unbound	08:37:04	5
2074991	99	24	22,2	cyclictest	2289113	-21	kworker/u16:1+flush-8:0	09:22:26	4
2074991	99	24	22,2	cyclictest	2289113	-21	kworker/u16:1+flush-8:0	09:22:26	4
2074991	99	24	22,2	cyclictest	2046327	-21	kworker/u16:3+events_unbound	07:27:16	4
2075001	99	23	23,0	cyclictest	0	-21	swapper/7	07:16:45	7
2075001	99	23	22,0	cyclictest	0	-21	swapper/7	09:00:25	7
2075001	99	23	22,0	cyclictest	0	-21	swapper/7	07:06:07	7
2075000	99	23	21,2	cyclictest	2550258	-21	kworker/u16:3+flush-8:0	11:37:17	6
2075000	99	23	19,3	cyclictest	1341679	-21	kworker/u16:0+events_unbound	07:06:56	6
2074991	99	23	21,2	cyclictest	2477475	-21	kworker/u16:0+flush-8:0	10:47:16	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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