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 Fri May 29, 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
3850840	2	100	0,1	sleep7	3850841	-21	ssh	11:33:21	7
3670408	2	96	0,1	sleep7	3670409	-21	rm	10:18:35	7
3936454	2	93	0,0	sleep6	0	-21	swapper/6	12:10:47	6
3336818	99	66	63,2	cyclictest	3934299	-21	smartctl	12:07:32	7
3336283	2	57	46,7	sleep5	0	-21	swapper/5	07:03:46	5
3336499	2	49	37,8	sleep4	0	-21	swapper/4	07:06:50	4
3336818	99	43	42,0	cyclictest	0	-21	swapper/7	09:52:04	7
3336803	99	42	40,2	cyclictest	3612036	-21	kworker/u16:1+events_unbound	10:56:47	4
3336818	99	40	39,0	cyclictest	0	-21	swapper/7	11:17:04	7
3336169	2	40	5,29	sleep7	0	-21	swapper/7	07:02:11	7
3336818	99	39	38,0	cyclictest	0	-21	swapper/7	12:34:04	7
3336818	99	38	36,1	cyclictest	0	-21	swapper/7	10:36:51	7
3336803	99	38	35,2	cyclictest	3705956	-21	kworker/u16:0+flush-8:0	10:42:02	4
3336818	99	37	36,0	cyclictest	0	-21	swapper/7	09:13:16	7
3336818	99	37	35,1	cyclictest	3502927	-21	ssh	09:10:44	7
3336818	99	37	35,1	cyclictest	0	-21	swapper/7	11:06:51	7
3336818	99	37	34,2	cyclictest	3551655	-21	ssh	09:31:48	7
3336803	99	37	34,2	cyclictest	3432954	-21	kworker/u16:3+flush-8:0	08:52:02	4
3336818	99	36	34,1	cyclictest	3889332	-21	ssh	11:52:03	7
3336818	99	36	34,1	cyclictest	3491576	-21	diskmemload	12:12:39	7
3336818	99	36	34,1	cyclictest	3491576	-21	diskmemload	09:42:43	7
3336816	99	36	34,2	cyclictest	3828836	-21	kworker/u16:3+flush-8:0	12:15:31	6
3336803	99	36	34,2	cyclictest	3828836	-21	kworker/u16:3+events_unbound	11:52:19	4
3336818	99	35	34,0	cyclictest	0	-21	swapper/7	11:12:48	7
3336818	99	35	34,0	cyclictest	0	-21	swapper/7	09:26:24	7
3336818	99	35	33,1	cyclictest	0	-21	swapper/7	10:08:55	7
3336818	99	34	33,0	cyclictest	0	-21	swapper/7	12:06:43	7
3336818	99	34	33,0	cyclictest	0	-21	swapper/7	09:38:35	7
3336818	99	34	32,1	cyclictest	3491576	-21	diskmemload	12:19:27	7
3336818	99	34	30,3	cyclictest	3742565	-21	ssh	10:48:31	7
3336803	99	34	32,2	cyclictest	3749176	-21	kworker/u16:2+events_unbound	11:26:47	4
3336206	2	34	24,7	sleep6	0	-21	swapper/6	07:02:43	6
3336818	99	33	32,0	cyclictest	0	-21	swapper/7	10:42:55	7
3336818	99	33	32,0	cyclictest	0	-21	swapper/7	09:36:28	7
3336818	99	33	31,1	cyclictest	3491576	-21	diskmemload	11:31:36	7
3336816	99	33	31,2	cyclictest	3828836	-21	kworker/u16:3+events_unbound	12:26:49	6
3336818	99	32	31,0	cyclictest	0	-21	swapper/7	12:23:51	7
3336818	99	32	31,0	cyclictest	0	-21	swapper/7	10:57:35	7
3336818	99	32	30,1	cyclictest	3911916	-21	ssh	12:00:00	7
3336818	99	32	30,1	cyclictest	3876660	-21	ssh	11:46:31	7
3336818	99	31	30,0	cyclictest	0	-21	swapper/7	11:48:48	7
3336818	99	31	30,0	cyclictest	0	-21	swapper/7	11:48:48	7
3336818	99	31	30,0	cyclictest	0	-21	swapper/7	10:52:56	7
3336818	99	30	29,0	cyclictest	0	-21	swapper/7	11:24:31	7
3336818	99	30	29,0	cyclictest	0	-21	swapper/7	10:05:00	7
3336818	99	30	29,0	cyclictest	0	-21	swapper/7	09:48:09	7
3336818	99	30	0,28	cyclictest	3984378	-21	ssh	12:29:35	7
3336818	99	30	0,28	cyclictest	3984378	-21	ssh	12:29:35	7
3336816	99	30	28,2	cyclictest	3612036	-21	kworker/u16:1+events_unbound	11:02:27	6
3336818	99	29	28,0	cyclictest	0	-21	swapper/7	10:02:00	7
3336818	99	29	28,0	cyclictest	0	-21	swapper/7	09:18:43	7
3336818	99	29	27,1	cyclictest	3693947	-21	ssh	10:27:40	7
3336803	99	29	27,2	cyclictest	3705956	-21	kworker/u16:0+flush-8:0	10:50:50	4
3336803	99	29	27,2	cyclictest	3657852	-21	kworker/u16:0+events_unbound	10:14:11	4
3336803	99	29	27,2	cyclictest	3612036	-21	kworker/u16:1+flush-8:0	11:17:24	4
3336818	99	28	27,0	cyclictest	0	-21	swapper/7	11:39:27	7
3336818	99	28	27,0	cyclictest	0	-21	swapper/7	10:38:27	7
3336808	99	28	21,7	cyclictest	3612036	-21	kworker/u16:1+flush-8:0	11:47:01	5
3336803	99	28	26,2	cyclictest	3937164	-21	kworker/u16:2+events_unbound	12:33:43	4
3336803	99	27	25,2	cyclictest	3876954	-21	kworker/u16:0+events_unbound	12:06:47	4
3336803	99	27	25,2	cyclictest	3749176	-21	kworker/u16:2+flush-8:0	11:31:11	4
3336803	99	27	25,2	cyclictest	3370010	-21	kworker/u16:2+flush-8:0	09:17:23	4
3336818	99	26	24,1	cyclictest	3683206	-21	sh	10:25:03	7
3336818	99	26	24,1	cyclictest	3683206	-21	sh	10:25:03	7
3336816	99	26	24,2	cyclictest	3401876	-21	kworker/u16:0+events_unbound	09:15:29	6
3336816	99	26	24,2	cyclictest	3336564	-21	kworker/u16:3+events_unbound	07:12:04	6
3336803	99	26	24,2	cyclictest	3636212	-21	kworker/u16:4+events_unbound	11:12:31	4
3336803	99	26	24,2	cyclictest	3443419	-21	kworker/u16:1+flush-8:0	09:32:12	4
3336803	99	26	24,2	cyclictest	3370010	-21	kworker/u16:2+flush-8:0	09:48:05	4
3336803	99	26	23,2	cyclictest	3539785	-21	kworker/u16:3+events_unbound	10:02:04	4
3336816	99	25	23,2	cyclictest	3828836	-21	kworker/u16:3+events_unbound	11:32:29	6
3336816	99	25	23,2	cyclictest	3636212	-21	kworker/u16:4+events_unbound	10:27:14	6
3336803	99	25	23,2	cyclictest	3828836	-21	kworker/u16:3+flush-8:0	11:47:31	4
3336803	99	25	23,2	cyclictest	3828836	-21	kworker/u16:3+flush-8:0	11:47:31	4
3336803	99	25	23,2	cyclictest	3597575	-21	kworker/u16:0+flush-8:0	09:52:31	4
3336816	99	24	22,2	cyclictest	3326222	-21	kworker/u16:1+events_unbound	07:07:15	6
3336816	99	24	21,2	cyclictest	3539785	-21	kworker/u16:3+events_unbound	10:12:04	6
3336803	99	24	21,2	cyclictest	3401876	-21	kworker/u16:0+events_unbound	08:52:22	4
3336818	99	23	22,0	cyclictest	0	-21	swapper/7	10:15:03	7
3336816	99	23	21,2	cyclictest	3876954	-21	kworker/u16:0+events_unbound	11:51:11	6
3336816	99	23	21,2	cyclictest	3876954	-21	kworker/u16:0+events_unbound	11:51:11	6
3336816	99	23	21,2	cyclictest	3749176	-21	kworker/u16:2+events_unbound	10:54:44	6
3336803	99	23	21,2	cyclictest	3828836	-21	kworker/u16:3+events_unbound	11:57:14	4
3336803	99	23	21,2	cyclictest	3636212	-21	kworker/u16:4+flush-8:0	10:32:23	4
3336816	99	22	20,2	cyclictest	3937164	-21	kworker/u16:2+events_unbound	12:27:53	6
3336816	99	22	20,2	cyclictest	3937164	-21	kworker/u16:2+events_unbound	12:27:53	6
3336816	99	22	20,2	cyclictest	3749176	-21	kworker/u16:2+events_unbound	11:31:40	6
3336816	99	22	20,2	cyclictest	3749176	-21	kworker/u16:2+events_unbound	11:13:12	6
3336816	99	22	20,2	cyclictest	3612036	-21	kworker/u16:1+events_unbound	12:01:12	6
3336816	99	22	20,2	cyclictest	3612036	-21	kworker/u16:1+events_unbound	11:23:43	6
3336816	99	22	20,2	cyclictest	3539785	-21	kworker/u16:3+events_unbound	09:47:11	6
3336816	99	22	20,2	cyclictest	3443419	-21	kworker/u16:1+events_unbound	09:25:00	6
3336808	99	22	20,2	cyclictest	3749176	-21	kworker/u16:2+flush-8:0	11:37:28	5
3336803	99	22	20,2	cyclictest	3335494	-21	kworker/u16:4+flush-8:0	07:22:03	4
3336818	99	21	20,0	cyclictest	0	-21	swapper/7	11:09:35	7
3336818	99	21	20,0	cyclictest	0	-21	swapper/7	11:09:35	7
3336816	99	21	19,2	cyclictest	3749176	-21	kworker/u16:2+events_unbound	11:21:32	6
3336816	99	21	19,2	cyclictest	3636212	-21	kworker/u16:4+events_unbound	10:26:24	6
3336816	99	21	19,2	cyclictest	3636212	-21	kworker/u16:4+events_unbound	10:26:24	6
3336816	99	21	19,2	cyclictest	3443419	-21	kworker/u16:1+events_unbound	09:30:28	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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