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 Wed Feb 18, 2026 00:43:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
620495	2	62	52,7	sleep5	0	-21	swapper/5	19:03:16	5
620495	2	62	52,7	sleep5	0	-21	swapper/5	19:03:16	5
620552	2	58	48,7	sleep6	0	-21	swapper/6	19:04:05	6
620552	2	58	48,7	sleep6	0	-21	swapper/6	19:04:05	6
620959	99	53	51,2	cyclictest	1081164	-21	kworker/u16:1+events_unbound	23:15:56	6
620959	99	47	45,2	cyclictest	1211945	-21	kworker/u16:1+events_unbound	23:40:57	6
620959	99	46	44,2	cyclictest	4101335	-21	kworker/u16:2+events_unbound	19:15:53	6
620956	99	46	44,2	cyclictest	889777	-21	kworker/u16:2+events_unbound	22:40:40	4
620957	99	44	41,2	cyclictest	601688	-21	kworker/u16:3+flush-8:0	19:20:28	5
620959	99	43	41,2	cyclictest	1078380	-21	kworker/u16:0+events_unbound	22:37:24	6
620959	99	42	40,2	cyclictest	1307566	-21	kworker/u16:1+events_unbound	00:21:32	6
620959	99	42	40,2	cyclictest	1235697	-21	kworker/u16:0+events_unbound	23:56:47	6
620957	99	42	40,2	cyclictest	601688	-21	kworker/u16:3+events_unbound	19:45:28	5
620963	99	41	36,4	cyclictest	985084	-21	latency_hist	22:00:28	7
620959	99	41	39,2	cyclictest	682238	-21	kworker/u16:0+events_unbound	21:13:32	6
612297	2	41	4,31	sleep7	0	-21	swapper/7	19:00:45	7
612297	2	41	4,31	sleep7	0	-21	swapper/7	19:00:45	7
620959	99	40	38,2	cyclictest	889777	-21	kworker/u16:2+events_unbound	22:22:00	6
620959	99	40	38,2	cyclictest	875616	-21	kworker/u16:1+events_unbound	21:39:12	6
620959	99	40	38,2	cyclictest	620715	-21	kworker/u16:1+events_unbound	19:10:29	6
620959	99	40	37,2	cyclictest	1081164	-21	kworker/u16:1+events_unbound	23:10:32	6
620957	99	40	38,2	cyclictest	682238	-21	kworker/u16:0+flush-8:0	19:50:29	5
620959	99	39	37,2	cyclictest	889777	-21	kworker/u16:2+events_unbound	21:59:39	6
620959	99	39	37,2	cyclictest	889777	-21	kworker/u16:2+events_unbound	21:32:12	6
620959	99	39	37,2	cyclictest	875616	-21	kworker/u16:1+events_unbound	21:27:52	6
620959	99	39	37,2	cyclictest	1173339	-21	kworker/u16:2+events_unbound	23:28:32	6
620959	99	39	37,1	cyclictest	970821	-21	kworker/u16:0+events_unbound	22:25:29	6
620957	99	39	37,2	cyclictest	601688	-21	kworker/u16:3+flush-8:0	20:55:28	5
620963	99	38	37,0	cyclictest	0	-21	swapper/7	22:45:47	7
620963	99	38	33,4	cyclictest	1068822	-21	latency_hist	22:35:28	7
620959	99	38	36,2	cyclictest	970821	-21	kworker/u16:0+events_unbound	22:14:44	6
620959	99	38	36,2	cyclictest	1271599	-21	kworker/u16:4+events_unbound	00:07:43	6
620959	99	38	36,2	cyclictest	1259589	-21	kworker/u16:2+events_unbound	00:13:39	6
620959	99	38	36,2	cyclictest	1259589	-21	kworker/u16:2+events_unbound	00:13:39	6
620959	99	38	36,2	cyclictest	1259589	-21	kworker/u16:2+events_unbound	00:04:20	6
620959	99	38	36,2	cyclictest	1211945	-21	kworker/u16:1+events_unbound	23:38:48	6
620959	99	38	36,2	cyclictest	1127305	-21	kworker/u16:0+events_unbound	23:10:12	6
620959	99	38	36,2	cyclictest	1081164	-21	kworker/u16:1+events_unbound	23:24:32	6
620959	99	37	35,2	cyclictest	937287	-21	kworker/u16:3+events_unbound	21:42:04	6
620959	99	37	35,2	cyclictest	889777	-21	kworker/u16:2+events_unbound	23:02:51	6
620959	99	37	35,2	cyclictest	863406	-21	kworker/u16:5+events_unbound	21:08:27	6
620959	99	37	35,2	cyclictest	601688	-21	kworker/u16:3+events_unbound	21:16:24	6
620959	99	37	35,2	cyclictest	1331157	-21	kworker/u16:3+events_unbound	00:26:15	6
620959	99	37	35,2	cyclictest	1235697	-21	kworker/u16:0+events_unbound	00:33:35	6
620959	99	37	35,2	cyclictest	1199148	-21	kworker/u16:0+events_unbound	23:34:28	6
620959	99	37	35,2	cyclictest	1081164	-21	kworker/u16:1+events_unbound	22:50:16	6
620959	99	37	35,2	cyclictest	1010769	-21	kworker/u16:3+events_unbound	22:57:20	6
620959	99	37	35,2	cyclictest	1010769	-21	kworker/u16:3+events_unbound	22:19:59	6
620959	99	37	35,2	cyclictest	1010769	-21	kworker/u16:3+events_unbound	22:19:59	6
620959	99	37	34,2	cyclictest	601688	-21	kworker/u16:3+events_unbound	21:20:30	6
620959	99	36	34,2	cyclictest	970821	-21	kworker/u16:0+events_unbound	21:53:59	6
620959	99	36	34,2	cyclictest	889777	-21	kworker/u16:2+events_unbound	22:41:48	6
620959	99	36	34,2	cyclictest	889777	-21	kworker/u16:2+events_unbound	22:08:44	6
620959	99	36	34,2	cyclictest	875616	-21	kworker/u16:1+events_unbound	21:46:55	6
620959	99	36	34,2	cyclictest	1152347	-21	kworker/u16:3+events_unbound	23:53:35	6
620956	99	36	32,3	cyclictest	1259589	-21	kworker/u16:2+events_unbound	00:05:42	4
620959	99	35	33,2	cyclictest	682238	-21	kworker/u16:0+flush-8:0	20:40:58	6
620959	99	35	33,2	cyclictest	1307566	-21	kworker/u16:1+events_unbound	00:19:19	6
620959	99	35	33,2	cyclictest	1235697	-21	kworker/u16:0+events_unbound	23:46:55	6
620959	99	35	33,2	cyclictest	1010769	-21	kworker/u16:3+events_unbound	22:51:52	6
620959	99	35	33,2	cyclictest	1010769	-21	kworker/u16:3+events_unbound	22:31:32	6
620957	99	35	33,2	cyclictest	1211945	-21	kworker/u16:1+events_unbound	23:35:48	5
620959	99	34	32,2	cyclictest	970821	-21	kworker/u16:0+events_unbound	22:01:40	6
620957	99	33	30,3	cyclictest	1271599	-21	kworker/u16:4+events_unbound	00:05:50	5
620963	99	32	31,0	cyclictest	0	-21	swapper/7	22:50:40	7
620959	99	32	30,2	cyclictest	682238	-21	kworker/u16:0+events_unbound	20:05:51	6
620957	99	32	30,2	cyclictest	889777	-21	kworker/u16:2+flush-8:0	21:25:49	5
620957	99	32	30,2	cyclictest	796483	-21	kworker/u16:1+flush-8:0	20:45:24	5
620957	99	32	30,2	cyclictest	682238	-21	kworker/u16:0+flush-8:0	20:20:28	5
620957	99	32	30,2	cyclictest	1081164	-21	kworker/u16:1+events_unbound	23:25:48	5
620956	99	32	30,2	cyclictest	875616	-21	kworker/u16:1+events_unbound	21:30:46	4
620609	2	32	22,7	sleep4	0	-21	swapper/4	19:04:51	4
620609	2	32	22,7	sleep4	0	-21	swapper/4	19:04:51	4
620959	99	31	29,2	cyclictest	601688	-21	kworker/u16:3+events_unbound	20:04:39	6
620957	99	30	27,2	cyclictest	682238	-21	kworker/u16:0+flush-8:0	20:35:28	5
620959	99	29	27,2	cyclictest	682238	-21	kworker/u16:0+events_unbound	20:51:39	6
620956	99	29	27,2	cyclictest	620715	-21	kworker/u16:1+events_unbound	19:05:43	4
620959	99	28	26,2	cyclictest	601688	-21	kworker/u16:3+events_unbound	20:30:58	6
620956	99	28	26,2	cyclictest	889777	-21	kworker/u16:2+flush-8:0	22:10:44	4
620956	99	28	26,2	cyclictest	1081164	-21	kworker/u16:1+events_unbound	23:25:39	4
620963	99	27	26,0	cyclictest	0	-21	swapper/7	20:25:49	7
620963	99	27	25,1	cyclictest	0	-21	swapper/7	21:40:52	7
620963	99	27	0,25	cyclictest	1307332	-21	latency_hist	00:15:27	7
620963	99	27	0,25	cyclictest	1307332	-21	latency_hist	00:15:27	7
620959	99	27	25,2	cyclictest	682238	-21	kworker/u16:0+events_unbound	19:56:30	6
620959	99	27	25,2	cyclictest	601688	-21	kworker/u16:3+events_unbound	20:21:52	6
620956	99	27	25,2	cyclictest	796483	-21	kworker/u16:1+flush-8:0	20:35:24	4
620956	99	27	25,2	cyclictest	1259589	-21	kworker/u16:2+flush-8:0	00:00:52	4
620956	99	27	25,2	cyclictest	1127305	-21	kworker/u16:0+events_unbound	23:10:40	4
620956	99	27	25,2	cyclictest	1044954	-21	kworker/u16:1+events_unbound	22:25:56	4
620963	99	26	25,0	cyclictest	0	-21	swapper/7	20:05:43	7
620957	99	26	24,2	cyclictest	970821	-21	kworker/u16:0+flush-8:0	22:20:43	5
620956	99	26	24,2	cyclictest	889777	-21	kworker/u16:2+events_unbound	23:05:41	4
620956	99	26	24,2	cyclictest	889777	-21	kworker/u16:2+events_unbound	21:25:43	4
620956	99	26	24,2	cyclictest	875616	-21	kworker/u16:1+events_unbound	21:40:57	4
620956	99	26	23,2	cyclictest	1235697	-21	kworker/u16:0+flush-8:0	23:55:55	4
620963	99	25	4,20	cyclictest	0	-21	swapper/7	22:20:43	7
620963	99	25	23,1	cyclictest	1319173	-21	ssh	00:20:22	7
620963	99	25	23,1	cyclictest	0	-21	swapper/7	19:10:48	7
620963	99	25	22,2	cyclictest	124	-21	kswapd0	00:35:23	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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