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 Tue Nov 18, 2025 12:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
106546	2	55	19,32	sleep7	0	-21	swapper/7	15:20:10	7
107126	99	54	52,2	cyclictest	658208	-21	kworker/u16:3+events_unbound	19:54:14	6
107124	99	50	48,2	cyclictest	670947	-21	kworker/u16:4+flush-8:0	20:19:17	5
107124	99	50	48,2	cyclictest	618013	-21	kworker/u16:0+events_unbound	19:49:17	5
107129	99	48	40,6	cyclictest	589235	-21	systemd-journal	19:38:47	7
107126	99	48	46,2	cyclictest	211925	-21	kworker/u16:4+flush-8:0	16:34:12	6
107126	99	48	45,2	cyclictest	632300	-21	kworker/u16:2+flush-8:0	20:09:01	6
107124	99	48	46,2	cyclictest	688866	-21	kworker/u16:3+events_unbound	20:38:05	5
107124	99	48	46,2	cyclictest	323129	-21	kworker/u16:2+events_unbound	17:14:17	5
107126	99	47	44,3	cyclictest	222511	-21	kworker/u16:1+flush-8:0	16:30:22	6
107124	99	47	45,2	cyclictest	632300	-21	kworker/u16:2+events_unbound	20:29:17	5
107124	99	47	45,2	cyclictest	303467	-21	kworker/u16:0+events_unbound	17:26:22	5
107124	99	47	44,2	cyclictest	252219	-21	kworker/u16:5+flush-8:0	16:38:47	5
107124	99	46	44,2	cyclictest	272432	-21	kworker/u16:1+events_unbound	16:43:22	5
107124	99	46	42,3	cyclictest	670947	-21	kworker/u16:4+flush-8:0	20:04:09	5
106792	2	46	36,7	sleep6	0	-21	swapper/6	15:23:30	6
106725	2	46	35,8	sleep4	0	-21	swapper/4	15:22:39	4
107124	99	45	43,2	cyclictest	181766	-21	kworker/u16:0+events_unbound	16:19:20	5
107124	99	45	43,2	cyclictest	170619	-21	kworker/u16:2+flush-8:0	15:54:02	5
107126	99	44	42,2	cyclictest	520615	-21	kworker/u16:3+events_unbound	18:49:17	6
107126	99	44	41,2	cyclictest	537390	-21	kworker/u16:2+flush-8:0	19:29:02	6
106677	2	44	34,7	sleep5	0	-21	swapper/5	15:22:00	5
107126	99	43	41,2	cyclictest	405567	-21	kworker/u16:2+events_unbound	18:10:43	6
107124	99	43	41,2	cyclictest	648105	-21	kworker/u16:1+events_unbound	20:43:07	5
107124	99	43	41,2	cyclictest	282770	-21	kworker/u16:0+flush-8:0	16:49:16	5
107117	99	43	41,2	cyclictest	383984	-21	kworker/u16:0+events_unbound	17:49:04	4
107129	99	42	37,4	cyclictest	648426	-21	latency_hist	19:48:46	7
107126	99	42	40,2	cyclictest	405567	-21	kworker/u16:2+flush-8:0	18:29:16	6
107124	99	42	40,2	cyclictest	394617	-21	kworker/u16:5+flush-8:0	19:44:15	5
107124	99	42	40,2	cyclictest	272432	-21	kworker/u16:1+flush-8:0	16:59:04	5
107124	99	42	40,2	cyclictest	151110	-21	kworker/u16:4+flush-8:0	15:44:02	5
107124	99	41	40,1	cyclictest	373800	-21	kworker/u16:3+events_unbound	17:41:07	5
107126	99	40	38,2	cyclictest	394617	-21	kworker/u16:5+events_unbound	19:44:16	6
107124	99	40	38,2	cyclictest	648105	-21	kworker/u16:1+events_unbound	20:44:14	5
107124	99	40	38,2	cyclictest	50708	-21	kworker/u16:1+events_unbound	15:52:22	5
107124	99	40	38,2	cyclictest	117169	-21	kworker/u16:3+flush-8:0	15:59:22	5
107129	99	39	34,3	cyclictest	589235	-21	systemd-journal	16:35:35	7
107126	99	39	37,2	cyclictest	516711	-21	kworker/u16:1+flush-8:0	18:59:03	6
107126	99	39	37,2	cyclictest	383984	-21	kworker/u16:0+flush-8:0	17:39:19	6
107126	99	39	36,2	cyclictest	292690	-21	kworker/u16:6+flush-8:0	17:34:02	6
107124	99	39	38,1	cyclictest	394617	-21	kworker/u16:5+flush-8:0	19:04:09	5
107124	99	39	37,2	cyclictest	373800	-21	kworker/u16:3+events_unbound	17:47:22	5
107124	99	39	37,2	cyclictest	373800	-21	kworker/u16:3+events_unbound	17:47:22	5
107126	99	38	36,2	cyclictest	50708	-21	kworker/u16:1+flush-8:0	16:09:21	6
107126	99	38	36,2	cyclictest	50708	-21	kworker/u16:1+flush-8:0	15:29:15	6
107124	99	38	36,2	cyclictest	223023	-21	kworker/u16:2+flush-8:0	16:30:15	5
107117	99	38	36,2	cyclictest	50708	-21	kworker/u16:1+events_unbound	15:28:49	4
107126	99	37	35,2	cyclictest	476661	-21	kworker/u16:0+events_unbound	18:34:59	6
107126	99	37	34,3	cyclictest	632300	-21	kworker/u16:2+flush-8:0	20:49:18	6
107124	99	37	35,2	cyclictest	537390	-21	kworker/u16:2+events_unbound	19:20:22	5
107126	99	36	34,2	cyclictest	658208	-21	kworker/u16:3+events_unbound	19:52:46	6
107126	99	36	34,2	cyclictest	222511	-21	kworker/u16:1+flush-8:0	16:24:18	6
107126	99	36	34,2	cyclictest	170619	-21	kworker/u16:2+events_unbound	16:02:57	6
107124	99	36	34,2	cyclictest	658208	-21	kworker/u16:3+events_unbound	19:56:21	5
107124	99	36	34,2	cyclictest	50708	-21	kworker/u16:1+events_unbound	15:42:22	5
107124	99	36	34,2	cyclictest	383984	-21	kworker/u16:0+events_unbound	17:59:21	5
107126	99	35	33,2	cyclictest	648105	-21	kworker/u16:1+flush-8:0	20:39:02	6
107126	99	35	33,2	cyclictest	394617	-21	kworker/u16:5+flush-8:0	17:54:18	6
107126	99	35	33,2	cyclictest	151110	-21	kworker/u16:4+events_unbound	15:44:05	6
107124	99	35	33,2	cyclictest	466323	-21	kworker/u16:1+events_unbound	18:21:22	5
107124	99	35	33,2	cyclictest	383984	-21	kworker/u16:0+flush-8:0	17:49:03	5
107124	99	35	33,2	cyclictest	292690	-21	kworker/u16:6+events_unbound	17:04:17	5
107126	99	34	32,2	cyclictest	516711	-21	kworker/u16:1+flush-8:0	19:05:58	6
107126	99	34	32,2	cyclictest	354090	-21	kworker/u16:2+flush-8:0	17:26:31	6
107126	99	34	32,2	cyclictest	292690	-21	kworker/u16:6+events_unbound	16:59:16	6
107126	99	34	32,2	cyclictest	252219	-21	kworker/u16:5+events_unbound	16:44:19	6
107126	99	34	32,2	cyclictest	121274	-21	kworker/u16:5+events_unbound	15:33:59	6
107126	99	34	31,2	cyclictest	537390	-21	kworker/u16:2+flush-8:0	19:23:49	6
107126	99	34	31,2	cyclictest	394617	-21	kworker/u16:5+events_unbound	17:44:01	6
107126	99	34	31,2	cyclictest	394617	-21	kworker/u16:5+events_unbound	17:44:01	6
107126	99	34	31,2	cyclictest	252219	-21	kworker/u16:5+flush-8:0	16:42:26	6
107124	99	34	31,2	cyclictest	632300	-21	kworker/u16:2+events_unbound	20:24:06	5
107126	99	33	31,2	cyclictest	723482	-21	kworker/u16:5+flush-8:0	20:32:29	6
107126	99	33	31,2	cyclictest	394617	-21	kworker/u16:5+events_unbound	19:09:50	6
107124	99	33	31,2	cyclictest	670947	-21	kworker/u16:4+events_unbound	20:11:22	5
107124	99	33	31,2	cyclictest	537389	-21	kworker/u16:0+events_unbound	19:16:21	5
107124	99	33	31,2	cyclictest	506134	-21	kworker/u16:4+events_unbound	18:44:16	5
107124	99	33	31,2	cyclictest	170619	-21	kworker/u16:2+flush-8:0	16:09:12	5
107124	99	33	30,2	cyclictest	223023	-21	kworker/u16:2+flush-8:0	16:24:02	5
107126	99	32	30,2	cyclictest	670947	-21	kworker/u16:4+events_unbound	19:59:13	6
107126	99	32	30,2	cyclictest	648105	-21	kworker/u16:1+events_unbound	20:25:34	6
107126	99	32	30,2	cyclictest	632300	-21	kworker/u16:2+events_unbound	20:19:13	6
107126	99	32	30,2	cyclictest	50708	-21	kworker/u16:1+events_unbound	15:40:54	6
107126	99	32	30,2	cyclictest	405567	-21	kworker/u16:2+flush-8:0	18:03:30	6
107126	99	32	30,2	cyclictest	323130	-21	kworker/u16:4+events_unbound	17:23:10	6
107126	99	32	30,2	cyclictest	323130	-21	kworker/u16:4+events_unbound	17:11:01	6
107126	99	32	30,2	cyclictest	252219	-21	kworker/u16:5+events_unbound	16:56:02	6
107126	99	32	30,2	cyclictest	211925	-21	kworker/u16:4+events_unbound	16:16:14	6
107126	99	32	29,2	cyclictest	723482	-21	kworker/u16:5+events_unbound	20:33:49	6
107124	99	32	30,2	cyclictest	50708	-21	kworker/u16:1+flush-8:0	15:24:19	5
107124	99	32	30,2	cyclictest	394617	-21	kworker/u16:5+events_unbound	19:30:49	5
107124	99	32	30,2	cyclictest	373800	-21	kworker/u16:3+flush-8:0	17:34:17	5
107124	99	32	30,2	cyclictest	252219	-21	kworker/u16:5+flush-8:0	16:58:41	5
107124	99	32	30,2	cyclictest	117169	-21	kworker/u16:3+events_unbound	15:37:21	5
107124	99	32	29,2	cyclictest	668546	-21	kworker/u16:0+flush-8:0	19:59:02	5
107129	99	31	30,0	cyclictest	0	-21	swapper/7	20:44:30	7
107126	99	31	29,2	cyclictest	670947	-21	kworker/u16:4+events_unbound	20:08:09	6
107126	99	31	29,2	cyclictest	466323	-21	kworker/u16:1+events_unbound	18:22:19	6
107126	99	31	29,2	cyclictest	292690	-21	kworker/u16:6+flush-8:0	17:31:02	6
107126	99	31	29,2	cyclictest	272432	-21	kworker/u16:1+events_unbound	16:50:57	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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