OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 rack0slot4s.osadl.org (updated Wed Aug 26, 2026 00:45:48)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3808250	2	367	329,13	sleep15	0	-21	swapper/15	19:09:59	7
3807967	2	361	343,12	sleep6	0	-21	swapper/6	19:06:21	12
3808013	2	357	347,6	sleep11	0	-21	swapper/11	19:06:58	3
3807906	2	354	334,13	sleep9	0	-21	swapper/9	19:05:35	15
3804556	2	352	331,14	sleep7	0	-21	swapper/7	19:05:01	13
3807987	2	351	331,13	sleep8	0	-21	swapper/8	19:06:39	14
3807973	2	351	332,12	sleep12	0	-21	swapper/12	19:06:27	4
3808184	2	350	330,13	sleep4	0	-21	swapper/4	19:09:16	10
3808138	2	349	329,13	sleep1	0	-21	swapper/1	19:08:41	1
3808103	2	349	329,13	sleep2	0	-21	swapper/2	19:08:09	8
3808012	2	349	329,13	sleep10	0	-21	swapper/10	19:06:57	2
3807966	2	349	329,13	sleep5	0	-21	swapper/5	19:06:21	11
3807992	2	348	327,14	sleep13	0	-21	swapper/13	19:06:44	5
3807941	2	348	339,6	sleep0	0	-21	swapper/0	19:05:59	0
3808158	2	347	327,13	sleep14	0	-21	swapper/14	19:08:54	6
3807947	2	346	325,14	sleep3	0	-21	swapper/3	19:06:02	9
3897635	2	60	0,1	sleep3	52	-21	ksoftirqd/3	20:54:59	9
3886188	2	57	0,0	sleep13	0	-21	swapper/13	20:40:13	5
3808679	99	55	54,1	cyclictest	4056872	-21	kworker/u32:4+flush-259:0	00:07:43	8
3808679	99	53	53,0	cyclictest	4059064	-21	ssh	23:04:37	8
3808716	99	51	1,25	cyclictest	0	-21	swapper/14	00:16:54	6
3808716	99	51	1,25	cyclictest	0	-21	swapper/14	00:16:54	6
3808679	99	50	50,0	cyclictest	4129659	-21	ssh	23:58:10	8
3808679	99	50	45,5	cyclictest	0	-21	swapper/2	23:54:37	8
3808679	99	50	40,9	cyclictest	3915973	-21	kworker/u32:0+flush-259:0	21:39:27	8
3808679	99	49	45,4	cyclictest	0	-21	swapper/2	22:25:57	8
3808679	99	48	42,6	cyclictest	0	-21	swapper/2	23:42:15	8
3808679	99	47	43,4	cyclictest	0	-21	swapper/2	22:39:42	8
3808679	99	47	41,6	cyclictest	0	-21	swapper/2	00:04:55	8
3808679	99	47	38,5	cyclictest	4121862	-21	kworker/u32:3+events_unbound	00:17:17	8
3808679	99	47	38,5	cyclictest	4121862	-21	kworker/u32:3+events_unbound	00:17:17	8
3808679	99	47	34,9	cyclictest	4092278	-21	latency_hist	23:29:59	8
3808679	99	46	42,4	cyclictest	0	-21	swapper/2	22:59:28	8
3808679	99	46	42,4	cyclictest	0	-21	swapper/2	22:03:12	8
3808679	99	45	43,2	cyclictest	0	-21	swapper/2	22:09:53	8
3808679	99	45	41,4	cyclictest	4044953	-21	ssh	22:52:30	8
3808679	99	45	41,4	cyclictest	0	-21	swapper/2	23:33:09	8
3808679	99	45	41,4	cyclictest	0	-21	swapper/2	23:08:30	8
3808679	99	45	41,4	cyclictest	0	-21	swapper/2	22:10:21	8
3808679	99	45	35,4	cyclictest	21	1	rcu_preempt	21:16:15	8
3808679	99	45	35,4	cyclictest	21	1	rcu_preempt	21:16:15	8
3808679	99	44	40,4	cyclictest	0	-21	swapper/2	23:14:22	8
3808679	99	44	40,4	cyclictest	0	-21	swapper/2	21:13:17	8
3808679	99	44	40,4	cyclictest	0	-21	swapper/2	21:13:17	8
3808679	99	44	40,4	cyclictest	0	-21	swapper/2	00:34:23	8
3808679	99	44	40,0	cyclictest	0	-21	swapper/2	23:38:24	8
3808679	99	44	40,0	cyclictest	0	-21	swapper/2	21:25:51	8
3808679	99	44	36,4	cyclictest	0	-21	swapper/2	21:41:17	8
3808679	99	44	23,17	cyclictest	4167789	-21	kworker/2:2-events	00:29:03	8
3808679	99	44	23,17	cyclictest	0	-21	swapper/2	23:17:14	8
3808679	99	44	23,17	cyclictest	0	-21	swapper/2	21:50:55	8
3808716	99	43	43,0	cyclictest	0	-21	swapper/14	22:12:42	6
3808679	99	43	39,4	cyclictest	0	-21	swapper/2	21:55:59	8
3808679	99	43	39,4	cyclictest	0	-21	swapper/2	00:37:09	8
3808679	99	43	37,6	cyclictest	0	-21	swapper/2	21:45:41	8
3808716	99	42	42,0	cyclictest	0	-21	swapper/14	21:09:11	6
3808716	99	42	42,0	cyclictest	0	-21	swapper/14	19:43:21	6
3808679	99	42	40,0	cyclictest	21	1	rcu_preempt	22:30:13	8
3808679	99	42	39,3	cyclictest	0	-21	swapper/2	00:22:48	8
3808679	99	42	39,3	cyclictest	0	-21	swapper/2	00:22:47	8
3808679	99	42	38,4	cyclictest	0	-21	swapper/2	00:14:55	8
3808679	99	42	38,0	cyclictest	0	-21	swapper/2	19:45:18	8
3808679	99	42	34,4	cyclictest	43	-21	ksoftirqd/2	19:19:51	8
3808679	99	42	34,4	cyclictest	42	1	ktimers/2	22:46:39	8
3808679	99	42	34,4	cyclictest	0	-21	swapper/2	23:49:37	8
3808679	99	42	21,19	cyclictest	0	-21	swapper/2	20:30:23	8
3808679	99	42	21,17	cyclictest	0	-21	swapper/2	22:43:29	8
3808679	99	42	21,17	cyclictest	0	-21	swapper/2	22:21:59	8
3808679	99	42	21,17	cyclictest	0	-21	swapper/2	21:31:46	8
3808716	99	41	29,12	cyclictest	0	-21	swapper/14	20:57:29	6
3808716	99	41	1,39	cyclictest	0	-21	swapper/14	19:32:05	6
3808679	99	41	37,4	cyclictest	3980937	-21	kworker/2:2-events	22:15:41	8
3808679	99	41	37,4	cyclictest	0	-21	swapper/2	23:21:59	8
3808679	99	41	37,4	cyclictest	0	-21	swapper/2	21:20:05	8
3808679	99	41	37,0	cyclictest	0	-21	swapper/2	19:20:21	8
3808679	99	41	26,4	cyclictest	3745384	-21	kworker/2:2+mm_percpu_wq	20:00:13	8
3808679	99	40	36,4	cyclictest	0	-21	swapper/2	21:00:13	8
3808679	99	40	24,16	cyclictest	0	-21	swapper/2	21:05:37	8
3808679	99	39	33,6	cyclictest	0	-21	swapper/2	20:46:37	8
3808679	99	39	28,4	cyclictest	21	1	rcu_preempt	20:58:37	8
3808679	99	39	22,17	cyclictest	0	-21	swapper/2	19:35:21	8
3808679	99	38	26,12	cyclictest	0	-21	swapper/2	20:50:29	8
3808679	99	38	22,12	cyclictest	3745384	-21	kworker/2:2+mm_percpu_wq	19:56:31	8
3808679	99	37	33,0	cyclictest	0	-21	swapper/2	19:25:51	8
3808679	99	37	20,17	cyclictest	0	-21	swapper/2	19:10:15	8
3808679	99	37	16,17	cyclictest	0	-21	swapper/2	20:27:25	8
3808704	99	36	13,4	cyclictest	0	-21	swapper/10	23:08:58	2
3808686	99	36	0,30	cyclictest	0	-21	swapper/4	20:10:16	10
3808679	99	36	32,4	cyclictest	0	-21	swapper/2	19:50:17	8
3808679	99	36	31,5	cyclictest	3870798	-21	libvirt-ifstat	20:20:17	8
3808679	99	36	15,17	cyclictest	0	-21	swapper/2	19:42:55	8
3808679	99	36	15,17	cyclictest	0	-21	swapper/2	19:31:11	8
3808679	99	35	16,16	cyclictest	0	-21	swapper/2	20:10:05	8
3808679	99	35	0,31	cyclictest	0	-21	swapper/2	20:40:23	8
3808679	99	34	30,4	cyclictest	0	-21	swapper/2	20:35:21	8
3808679	99	34	26,4	cyclictest	0	-21	swapper/2	20:19:57	8
3808716	99	33	33,0	cyclictest	0	-21	swapper/14	20:18:23	6
3808716	99	33	33,0	cyclictest	0	-21	swapper/14	19:54:23	6
3808686	99	33	0,30	cyclictest	0	-21	swapper/4	21:06:09	10
3808679	99	33	29,0	cyclictest	3745384	-21	kworker/2:2+mm_percpu_wq	20:07:27	8
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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