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 Jan 26, 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
2394884	2	75	0,1	sleep7	2394885	-21	ssh	09:45:17	7
2061656	2	68	58,7	sleep6	0	-21	swapper/6	07:02:50	6
2061918	2	55	45,7	sleep5	0	-21	swapper/5	07:06:34	5
2061702	2	55	21,30	sleep7	0	-21	swapper/7	07:03:31	7
2062237	99	54	51,2	cyclictest	2063659	-21	kworker/u16:1+events_unbound	07:22:12	4
2062237	99	49	47,2	cyclictest	2517917	-21	kworker/u16:1+flush-8:0	11:37:29	4
2062237	99	48	45,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:52:11	4
2062237	99	47	45,2	cyclictest	2712913	-21	kworker/u16:0+flush-8:0	12:07:12	4
2062237	99	47	43,3	cyclictest	2517917	-21	kworker/u16:1+flush-8:0	11:22:26	4
2062248	99	46	0,44	cyclictest	2259468	-21	latency_hist	08:46:58	7
2062237	99	45	43,2	cyclictest	626190	-21	kworker/u16:2+flush-8:0	07:16:58	4
2062237	99	45	43,2	cyclictest	2420709	-21	kworker/u16:0+events_unbound	10:31:57	4
2062248	99	44	38,5	cyclictest	650	-21	systemd-journal	11:26:57	7
2062237	99	44	42,2	cyclictest	2615699	-21	kworker/u16:4+events_unbound	11:27:25	4
2062237	99	44	42,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:57:29	4
2062248	99	43	0,41	cyclictest	650	-21	systemd-journal	09:21:52	7
2062237	99	41	39,2	cyclictest	2152027	-21	kworker/u16:2+flush-8:0	08:01:58	4
2062243	99	40	36,3	cyclictest	2268797	-21	kworker/u16:2+flush-8:0	10:41:57	6
2062241	99	40	38,2	cyclictest	2615699	-21	kworker/u16:4+events_unbound	12:32:24	5
2062241	99	40	38,2	cyclictest	2615699	-21	kworker/u16:4+events_unbound	12:32:24	5
2062241	99	39	36,2	cyclictest	2529980	-21	kworker/u16:4+events_unbound	10:51:59	5
2062237	99	38	36,2	cyclictest	2420709	-21	kworker/u16:0+events_unbound	11:07:20	4
2062237	99	38	36,2	cyclictest	2334894	-21	kworker/u16:0+events_unbound	09:31:52	4
2062237	99	38	35,2	cyclictest	2615699	-21	kworker/u16:4+flush-8:0	12:17:12	4
2062241	99	37	35,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:16:54	5
2062241	99	37	35,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:16:54	5
2062237	99	37	35,2	cyclictest	2320086	-21	kworker/u16:4+events_unbound	09:47:20	4
2062237	99	36	34,2	cyclictest	2785874	-21	kworker/u16:1+flush-8:0	12:32:23	4
2062237	99	36	34,2	cyclictest	2785874	-21	kworker/u16:1+flush-8:0	12:32:23	4
2062237	99	36	34,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:48:57	4
2062237	99	36	34,2	cyclictest	2298189	-21	kworker/u16:3+events_unbound	09:14:01	4
2062241	99	35	33,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:35:22	5
2062241	99	35	33,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	10:47:25	5
2062241	99	35	33,2	cyclictest	2420709	-21	kworker/u16:0+events_unbound	10:45:54	5
2062237	99	35	32,2	cyclictest	2063659	-21	kworker/u16:1+flush-8:0	07:31:58	4
2061937	2	35	25,7	sleep4	0	-21	swapper/4	07:06:49	4
2062241	99	34	32,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:26:33	5
2062241	99	34	31,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	10:21:59	5
2062241	99	34	31,2	cyclictest	2071918	-21	kworker/u16:4+flush-8:0	07:22:14	5
2062237	99	34	32,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	10:57:59	4
2062248	99	33	32,0	cyclictest	0	-21	swapper/7	11:21:34	7
2062241	99	33	31,2	cyclictest	2615699	-21	kworker/u16:4+events_unbound	11:52:24	5
2062241	99	33	31,2	cyclictest	2420709	-21	kworker/u16:0+flush-8:0	10:57:46	5
2062237	99	33	31,2	cyclictest	2420709	-21	kworker/u16:0+events_unbound	10:55:24	4
2062237	99	33	31,2	cyclictest	2320086	-21	kworker/u16:4+flush-8:0	09:36:58	4
2062237	99	33	31,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	09:44:57	4
2062237	99	33	30,2	cyclictest	2320086	-21	kworker/u16:4+events_unbound	10:07:57	4
2062241	99	32	30,2	cyclictest	2770545	-21	kworker/u16:2+events_unbound	12:19:42	5
2062241	99	32	30,2	cyclictest	2636626	-21	kworker/u16:2+events_unbound	11:39:46	5
2062241	99	32	30,2	cyclictest	2320086	-21	kworker/u16:4+events_unbound	10:17:53	5
2062237	99	32	30,2	cyclictest	2615699	-21	kworker/u16:4+events_unbound	12:13:27	4
2062237	99	32	30,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	10:06:43	4
2062237	99	32	29,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:33:17	4
2062241	99	31	29,2	cyclictest	2320086	-21	kworker/u16:4+flush-8:0	09:48:07	5
2062241	99	31	29,2	cyclictest	2320086	-21	kworker/u16:4+events_unbound	10:08:50	5
2062241	99	31	28,2	cyclictest	2615699	-21	kworker/u16:4+events_unbound	11:27:08	5
2062237	99	31	29,2	cyclictest	2636626	-21	kworker/u16:2+flush-8:0	11:42:26	4
2062237	99	31	29,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	09:55:52	4
2062237	99	31	29,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	09:55:52	4
2062248	99	30	24,5	cyclictest	2162700	-21	latency_hist	07:56:58	7
2062241	99	30	28,2	cyclictest	2615699	-21	kworker/u16:4+events_unbound	12:08:55	5
2062237	99	30	28,2	cyclictest	2420709	-21	kworker/u16:0+events_unbound	10:18:01	4
2062237	99	30	27,2	cyclictest	2770545	-21	kworker/u16:2+flush-8:0	12:22:07	4
2062248	99	29	28,0	cyclictest	0	-21	swapper/7	12:24:35	7
2062241	99	29	27,2	cyclictest	2770545	-21	kworker/u16:2+events_unbound	12:25:30	5
2062241	99	29	27,2	cyclictest	2615699	-21	kworker/u16:4+events_unbound	12:28:10	5
2062241	99	29	27,2	cyclictest	2395923	-21	kworker/u16:1+flush-8:0	09:52:39	5
2062241	99	29	27,2	cyclictest	2395923	-21	kworker/u16:1+flush-8:0	09:52:39	5
2062241	99	29	27,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	09:30:26	5
2062237	99	29	27,2	cyclictest	2529980	-21	kworker/u16:4+events_unbound	10:51:32	4
2062237	99	29	27,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	09:24:18	4
2062241	99	28	26,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	12:14:45	5
2062241	99	28	26,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:06:29	5
2062241	99	28	26,2	cyclictest	2298189	-21	kworker/u16:3+events_unbound	09:23:06	5
2062241	99	28	26,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	10:34:30	5
2062241	99	28	26,2	cyclictest	2133864	-21	kworker/u16:0+events_unbound	08:23:45	5
2062241	99	28	25,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	10:02:21	5
2062237	99	28	27,1	cyclictest	2517917	-21	kworker/u16:1+events_unbound	12:06:44	4
2062237	99	28	26,2	cyclictest	2712913	-21	kworker/u16:0+events_unbound	12:28:08	4
2062237	99	28	26,2	cyclictest	2588860	-21	kworker/u16:2+events_unbound	11:13:56	4
2062237	99	28	26,2	cyclictest	2588860	-21	kworker/u16:2+events_unbound	11:13:56	4
2062237	99	28	26,2	cyclictest	2420709	-21	kworker/u16:0+events_unbound	09:58:01	4
2062237	99	28	26,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	10:46:48	4
2062241	99	27	25,2	cyclictest	2615699	-21	kworker/u16:4+flush-8:0	11:47:15	5
2062241	99	27	25,2	cyclictest	2268797	-21	kworker/u16:2+flush-8:0	10:12:37	5
2062241	99	27	25,2	cyclictest	2071918	-21	kworker/u16:4+events_unbound	07:39:12	5
2062241	99	27	24,2	cyclictest	2063659	-21	kworker/u16:1+events_unbound	07:56:59	5
2062237	99	27	25,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:06:17	4
2062237	99	27	25,2	cyclictest	2420709	-21	kworker/u16:0+events_unbound	10:13:00	4
2062237	99	27	24,3	cyclictest	2320086	-21	kworker/u16:4+flush-8:0	09:17:03	4
2383571	2	26	0,1	chrt	2383569	-21	ssh	09:41:56	7
2062241	99	26	24,2	cyclictest	2517917	-21	kworker/u16:1+events_unbound	11:59:26	5
2062241	99	26	24,2	cyclictest	2268797	-21	kworker/u16:2+events_unbound	10:37:43	5
2062241	99	26	24,2	cyclictest	2133864	-21	kworker/u16:0+events_unbound	08:15:48	5
2062241	99	26	24,2	cyclictest	2123681	-21	kworker/u16:3+events_unbound	07:43:16	5
2062241	99	26	24,2	cyclictest	2071918	-21	kworker/u16:4+events_unbound	07:35:29	5
2062241	99	26	24,2	cyclictest	2033105	-21	kworker/u16:3+events_unbound	07:09:04	5
2062237	99	26	24,2	cyclictest	2133864	-21	kworker/u16:0+flush-8:0	08:42:23	4
2062248	99	25	24,0	cyclictest	0	-21	swapper/7	09:02:13	7
2062241	99	25	23,2	cyclictest	2320086	-21	kworker/u16:4+flush-8:0	09:57:45	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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