OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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
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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.

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 rack4slot1s.osadl.org (updated Thu Jun 04, 2026 00:44:18)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
17819	2	71	0,3	sleep3	0	-21	swapper/3	00:07:57	3
17819	2	71	0,3	sleep3	0	-21	swapper/3	00:07:57	3
16426	2	69	0,3	sleep3	0	-21	swapper/3	21:03:01	3
16426	2	69	0,3	sleep3	0	-21	swapper/3	21:03:01	3
4161	2	64	0,8	sleep1	4166	-21	timerwakeupswit	20:13:02	1
4161	2	64	0,8	sleep1	4166	-21	timerwakeupswit	20:13:02	1
22745	2	59	0,2	sleep3	0	-21	swapper/3	21:27:57	3
22745	2	59	0,2	sleep3	0	-21	swapper/3	21:27:57	3
5150	2	56	0,3	chrt	0	-21	swapper/3	22:07:57	3
19280	2	54	0,3	sleep1	19282	-21	head	21:13:04	1
19280	2	54	0,3	sleep1	19282	-21	head	21:13:04	1
19280	2	54	0,3	sleep1	19282	-21	head	21:13:04	1
21607	2	53	0,3	chrt	0	-21	swapper/3	00:17:58	3
21607	2	53	0,3	chrt	0	-21	swapper/3	00:17:58	3
21607	2	53	0,3	chrt	0	-21	swapper/3	00:17:58	3
14405	2	50	0,2	sleep2	0	-21	swapper/2	23:57:59	2
14405	2	50	0,2	sleep2	0	-21	swapper/2	23:57:59	2
27314	2	49	0,3	chrt	0	-21	swapper/3	23:07:51	3
27314	2	49	0,3	chrt	0	-21	swapper/3	23:07:51	3
27314	2	49	0,3	chrt	0	-21	swapper/3	23:07:51	3
24906	2	48	0,4	chrt	0	-21	swapper/2	22:58:05	2
24906	2	48	0,4	chrt	0	-21	swapper/2	22:58:05	2
10955	2	48	0,2	sleep1	0	-21	swapper/1	20:42:53	1
10955	2	48	0,2	sleep1	0	-21	swapper/1	20:42:53	1
20778	99	47	39,6	cyclictest	0	-21	swapper/0	00:02:59	0
20778	99	47	39,6	cyclictest	0	-21	swapper/0	00:02:59	0
20778	99	47	39,6	cyclictest	0	-21	swapper/0	00:02:59	0
10365	2	47	0,2	chrt	10368	-21	sed	20:42:44	0
8797	2	46	0,3	sleep3	0	-21	swapper/3	20:32:58	3
9093	2	43	0,3	sleep2	0	-21	swapper/2	20:33:01	2
20786	99	43	5,27	cyclictest	15538	-21	chrt	00:02:51	3
20786	99	43	5,27	cyclictest	15538	-21	chrt	00:02:51	3
20778	99	43	1,36	cyclictest	13154	-21	kworker/u9:2+rpciod	00:02:51	0
20778	99	43	1,36	cyclictest	13154	-21	kworker/u9:2+rpciod	00:02:51	0
32042	2	42	0,3	sleep3	0	-21	swapper/3	21:52:58	3
32042	2	42	0,3	sleep3	0	-21	swapper/3	21:52:58	3
31261	2	42	0,2	sleep2	0	-21	swapper/2	19:52:57	2
31261	2	42	0,2	sleep2	0	-21	swapper/2	19:52:57	2
31261	2	42	0,2	sleep2	0	-21	swapper/2	19:52:57	2
28667	2	40	0,2	sleep2	0	-21	swapper/2	21:43:01	2
28667	2	40	0,2	sleep2	0	-21	swapper/2	21:43:01	2
28667	2	40	0,2	sleep2	0	-21	swapper/2	21:43:01	2
29039	2	39	0,3	sleep3	0	-21	swapper/3	21:43:05	3
29039	2	39	0,3	sleep3	0	-21	swapper/3	21:43:05	3
29039	2	39	0,3	sleep3	0	-21	swapper/3	21:43:05	3
20779	99	39	33,4	cyclictest	1	-21	systemd	00:02:44	1
20779	99	39	33,4	cyclictest	1	-21	systemd	00:02:44	1
6378	2	38	0,3	sleep2	0	-21	swapper/2	20:23:01	2
6378	2	38	0,3	sleep2	0	-21	swapper/2	20:23:01	2
31808	2	38	0,3	sleep3	0	-21	swapper/3	19:53:02	3
31808	2	38	0,3	sleep3	0	-21	swapper/3	19:53:02	3
31808	2	38	0,3	sleep3	0	-21	swapper/3	19:53:02	3
20781	99	38	2,25	cyclictest	16380	-21	chrt	00:03:02	2
20781	99	38	2,25	cyclictest	16380	-21	chrt	00:03:02	2
20781	99	38	2,25	cyclictest	16380	-21	chrt	00:03:02	2
20779	99	38	32,4	cyclictest	10332	-21	latency_hist	22:22:58	1
20779	99	38	32,4	cyclictest	10332	-21	latency_hist	22:22:58	1
28798	2	37	0,2	sleep2	0	-21	swapper/2	00:37:55	2
28798	2	37	0,2	sleep2	0	-21	swapper/2	00:37:55	2
28798	2	37	0,2	sleep2	0	-21	swapper/2	00:37:55	2
24711	2	37	0,2	sleep1	24905	-21	unixbench_singl	22:58:05	1
24711	2	37	0,2	sleep1	24905	-21	unixbench_singl	22:58:05	1
22950	2	37	0,2	sleep2	0	-21	swapper/2	22:53:07	2
22950	2	37	0,2	sleep2	0	-21	swapper/2	22:53:07	2
22950	2	37	0,2	sleep2	0	-21	swapper/2	22:53:07	2
11995	2	37	0,3	sleep1	0	-21	swapper/1	23:52:56	1
11995	2	37	0,3	sleep1	0	-21	swapper/1	23:52:56	1
21894	2	36	0,3	chrt	0	-21	swapper/2	00:18:01	2
21894	2	36	0,3	chrt	0	-21	swapper/2	00:18:01	2
21894	2	36	0,3	chrt	0	-21	swapper/2	00:18:01	2
20779	99	35	30,3	cyclictest	5895	-21	kworker/u9:4-xprtiod	00:02:56	1
20779	99	35	30,3	cyclictest	5895	-21	kworker/u9:4-xprtiod	00:02:56	1
20779	99	35	30,3	cyclictest	5895	-21	kworker/u9:4-xprtiod	00:02:56	1
4609	2	34	0,4	chrt	4611	-21	grep	23:32:57	0
4609	2	34	0,4	chrt	4611	-21	grep	23:32:57	0
20779	99	34	29,3	cyclictest	19726	-21	latency_hist	22:47:43	1
20779	99	34	29,3	cyclictest	19726	-21	latency_hist	22:47:43	1
20778	99	34	25,7	cyclictest	6922	-21	netstat	23:38:03	0
20778	99	34	25,7	cyclictest	6922	-21	netstat	23:38:03	0
20778	99	34	25,7	cyclictest	6922	-21	netstat	23:38:03	0
26885	2	33	0,3	chrt	0	-21	swapper/2	19:33:03	2
26885	2	33	0,3	chrt	0	-21	swapper/2	19:33:03	2
20779	99	33	28,4	cyclictest	572	-21	cups-browsed	23:23:03	1
20779	99	33	28,4	cyclictest	572	-21	cups-browsed	23:23:03	1
20779	99	33	27,4	cyclictest	8349	-21	gltestperf	20:32:53	1
20779	99	33	27,4	cyclictest	8349	-21	gltestperf	20:32:53	1
20779	99	33	26,5	cyclictest	335	-21	latency_hist	20:02:44	1
20779	99	33	26,5	cyclictest	335	-21	latency_hist	20:02:44	1
20779	99	33	25,6	cyclictest	10358	-21	cut	22:22:44	1
20779	99	33	25,6	cyclictest	10358	-21	cut	22:22:44	1
20779	99	33	25,6	cyclictest	10358	-21	cut	22:22:44	1
20779	99	33	25,6	cyclictest	10358	-21	cut	22:22:44	1
20778	99	33	28,3	cyclictest	2828	-21	latency_hist	22:02:44	0
20778	99	33	28,3	cyclictest	2828	-21	latency_hist	22:02:44	0
20779	99	32	26,5	cyclictest	3477	-21	threads	23:28:05	1
20779	99	32	26,5	cyclictest	3477	-21	threads	23:28:05	1
20779	99	32	26,5	cyclictest	3477	-21	threads	23:28:05	1
20779	99	32	25,5	cyclictest	27899	-21	threads	00:33:07	1
20779	99	32	25,5	cyclictest	27899	-21	threads	00:33:07	1
20779	99	32	25,5	cyclictest	27899	-21	threads	00:33:07	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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