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 Jul 15, 2026 00:45:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4189	98	63	0,61	rtkit-daemon	0	-21	swapper/10	19:05:03	2
1067387	2	57	55,1	sleep7	0	-21	swapper/7	19:07:04	13
1068133	99	46	8,25	cyclictest	1050836	-1	kworker/u33:0+i915_flip	23:05:46	6
1068133	99	43	5,25	cyclictest	0	-21	swapper/14	19:59:02	6
1067344	2	43	41,1	sleep14	0	-21	swapper/14	19:06:39	6
1068133	99	42	4,25	cyclictest	618598	-21	thunderbird	00:22:38	6
1068113	99	41	40,0	cyclictest	1055044	-1	kworker/u33:1+i915_flip	22:05:25	15
1068110	99	41	37,4	cyclictest	0	-21	swapper/8	19:14:51	14
1068092	99	40	38,2	cyclictest	618598	-21	thunderbird	23:39:43	8
1067586	2	40	37,2	sleep11	0	-21	swapper/11	19:09:16	3
1067535	2	40	38,1	sleep1	0	-21	swapper/1	19:08:34	1
1068133	99	39	14,25	cyclictest	618680	-21	Compositor	21:48:52	6
1068092	99	39	38,1	cyclictest	3578	-21	gnome-shell	23:45:41	8
1068092	99	39	37,2	cyclictest	618598	-21	thunderbird	23:17:00	8
1068092	99	39	37,2	cyclictest	618598	-21	thunderbird	23:16:59	8
1067475	2	39	37,1	sleep12	0	-21	swapper/12	19:07:57	4
1068133	99	38	37,1	cyclictest	618698	-21	WRScene~ilder#1	22:28:15	6
1068133	99	38	37,1	cyclictest	0	-21	swapper/14	22:47:47	6
1068092	99	38	38,0	cyclictest	0	-21	swapper/2	22:27:06	8
1068092	99	38	37,1	cyclictest	618598	-21	thunderbird	22:15:13	8
1068092	99	38	37,1	cyclictest	618598	-21	thunderbird	19:34:37	8
1068092	99	38	37,1	cyclictest	618598	-21	thunderbird	00:34:04	8
1068092	99	38	37,1	cyclictest	1214041	-21	ssh	21:44:06	8
1068092	99	38	35,1	cyclictest	618598	-21	thunderbird	21:30:54	8
1067280	2	38	36,1	sleep15	0	-21	swapper/15	19:05:52	7
1068135	99	37	36,1	cyclictest	0	-21	swapper/15	00:34:10	7
1068133	99	37	36,1	cyclictest	1319949	-21	kworker/u32:4+events_unbound	23:30:20	6
1068133	99	37	36,1	cyclictest	1276581	-21	kworker/u32:3+events_unbound	22:40:16	6
1068108	99	37	36,1	cyclictest	1366058	-21	kworker/u32:5+events_unbound	00:35:18	13
1068101	99	37	37,0	cyclictest	0	-21	swapper/5	20:43:57	11
1068092	99	37	36,1	cyclictest	618598	-21	thunderbird	22:51:51	8
1068092	99	37	36,1	cyclictest	618598	-21	thunderbird	21:26:27	8
1068092	99	37	36,1	cyclictest	1366058	-21	kworker/u32:5+flush-259:0	00:20:54	8
1068092	99	37	35,2	cyclictest	618598	-21	thunderbird	00:10:14	8
1068092	99	37	34,3	cyclictest	1157025	-21	awk	20:55:00	8
1068092	99	37	34,2	cyclictest	1294442	-21	wc	22:45:20	8
1067147	2	37	35,1	sleep6	0	-21	swapper/6	19:05:26	12
1068133	99	36	36,0	cyclictest	1050836	-1	kworker/u33:0+i915_flip	23:46:29	6
1068133	99	36	36,0	cyclictest	0	-21	swapper/14	23:15:42	6
1068133	99	36	36,0	cyclictest	0	-21	swapper/14	23:15:41	6
1068098	99	36	36,0	cyclictest	0	-21	swapper/4	19:48:21	10
1068092	99	36	35,1	cyclictest	618598	-21	thunderbird	19:48:05	8
1068089	99	36	33,3	cyclictest	0	-21	swapper/1	20:41:58	1
1067556	2	36	34,1	sleep5	0	-21	swapper/5	19:08:54	11
1068101	99	35	35,0	cyclictest	0	-21	swapper/5	22:52:27	11
1068094	99	35	34,1	cyclictest	1055044	-1	kworker/u33:1+i915_flip	21:15:55	9
1068092	99	35	34,1	cyclictest	618598	-21	thunderbird	22:34:29	8
1068092	99	35	34,1	cyclictest	618598	-21	thunderbird	21:52:38	8
1068092	99	35	33,2	cyclictest	1168732	-21	find	21:05:23	8
1068092	99	35	33,2	cyclictest	0	-21	swapper/2	22:04:15	8
1068092	99	35	33,0	cyclictest	0	-21	swapper/2	23:40:20	8
1068092	99	35	32,3	cyclictest	618598	-21	thunderbird	23:54:06	8
1068092	99	35	32,3	cyclictest	0	-21	swapper/2	23:59:01	8
1068092	99	35	32,3	cyclictest	0	-21	swapper/2	22:35:26	8
1067492	2	35	32,2	sleep4	0	-21	swapper/4	19:08:05	10
1067469	2	35	33,1	sleep8	0	-21	swapper/8	19:07:53	14
1067308	2	35	33,1	sleep0	0	-21	swapper/0	19:06:08	0
1068133	99	34	33,1	cyclictest	0	-21	swapper/14	00:28:25	6
1068092	99	34	33,1	cyclictest	618598	-21	thunderbird	00:29:11	8
1068092	99	34	33,0	cyclictest	0	-21	swapper/2	21:22:54	8
1068092	99	34	29,3	cyclictest	618598	-21	thunderbird	23:11:02	8
1068092	99	34	29,3	cyclictest	618598	-21	thunderbird	23:11:01	8
1068092	99	34	28,3	cyclictest	618598	-21	thunderbird	21:35:59	8
1068092	99	34	1,31	cyclictest	1315243	-21	kworker/2:1-events	23:05:26	8
1068092	99	34	0,32	cyclictest	1408226	-21	kworker/2:1+mm_percpu_wq	00:35:17	8
1067381	2	34	32,1	sleep3	0	-21	swapper/3	19:07:00	9
1068135	99	33	32,1	cyclictest	0	-21	swapper/15	21:54:20	7
1068133	99	33	9,11	cyclictest	0	-21	swapper/14	22:54:47	6
1068133	99	33	9,11	cyclictest	0	-21	swapper/14	22:32:49	6
1068133	99	33	9,11	cyclictest	0	-21	swapper/14	21:04:57	6
1068133	99	33	9,11	cyclictest	0	-21	swapper/14	20:42:58	6
1068133	99	33	9,11	cyclictest	0	-21	swapper/14	19:26:06	6
1068133	99	33	9,11	cyclictest	0	-21	swapper/14	00:00:40	6
1068128	99	33	32,1	cyclictest	0	-21	swapper/13	19:42:35	5
1068113	99	33	0,30	cyclictest	0	-21	swapper/9	23:25:15	15
1068098	99	33	33,0	cyclictest	0	-21	swapper/4	20:19:55	10
1068098	99	33	1,32	cyclictest	60	1	ktimers/4	20:29:07	10
1068098	99	33	1,32	cyclictest	60	1	ktimers/4	20:29:07	10
1068094	99	33	31,1	cyclictest	0	-21	swapper/3	20:26:49	9
1068094	99	33	31,1	cyclictest	0	-21	swapper/3	20:26:48	9
1068092	99	33	32,1	cyclictest	618598	-21	thunderbird	20:44:44	8
1068092	99	33	32,1	cyclictest	1092510	-21	kworker/u32:1+events_unbound	19:53:41	8
1068092	99	33	31,2	cyclictest	0	-21	swapper/2	19:44:59	8
1068092	99	33	31,0	cyclictest	0	-21	swapper/2	23:33:02	8
1068092	99	33	31,0	cyclictest	0	-21	swapper/2	21:45:57	8
1068092	99	33	31,0	cyclictest	0	-21	swapper/2	19:21:07	8
1068092	99	33	30,3	cyclictest	0	-21	swapper/2	23:23:18	8
1068092	99	33	30,3	cyclictest	0	-21	swapper/2	23:23:17	8
1068092	99	33	30,3	cyclictest	0	-21	swapper/2	22:11:23	8
1068092	99	33	30,3	cyclictest	0	-21	swapper/2	00:08:15	8
1068092	99	33	30,3	cyclictest	0	-21	swapper/2	00:03:28	8
1068092	99	33	29,4	cyclictest	618598	-21	thunderbird	19:25:45	8
1068092	99	33	28,3	cyclictest	618598	-21	thunderbird	20:09:37	8
1068092	99	33	24,6	cyclictest	1291174	-21	ssh	22:44:19	8
1068092	99	33	0,32	cyclictest	618598	-21	thunderbird	21:57:03	8
1067511	2	33	31,1	sleep2	0	-21	swapper/2	19:08:20	8
1067498	2	33	31,1	sleep9	0	-21	swapper/9	19:08:10	15
1068135	99	32	32,0	cyclictest	0	-21	swapper/15	23:58:09	7
1068135	99	32	32,0	cyclictest	0	-21	swapper/15	23:06:14	7
1068133	99	32	8,11	cyclictest	0	-21	swapper/14	20:53:57	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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