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 Sun Aug 16, 2026 00:45:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
714033	2	67	48,18	sleep11	0	-21	swapper/11	19:08:49	3
714090	2	48	46,1	sleep14	0	-21	swapper/14	19:09:24	6
4189	98	47	0,45	rtkit-daemon	0	-21	swapper/9	19:09:04	15
714587	99	44	8,11	cyclictest	1161449	-21	thunderbird	20:16:07	6
714587	99	44	6,14	cyclictest	1161449	-21	thunderbird	23:11:52	6
714587	99	43	18,1	cyclictest	1161449	-21	thunderbird	23:33:50	6
713831	2	42	40,1	sleep4	0	-21	swapper/4	19:06:35	10
713835	2	41	39,1	sleep7	0	-21	swapper/7	19:06:37	13
714585	99	40	39,1	cyclictest	968239	-21	kworker/u32:2+events_unbound	23:15:17	5
713971	2	40	38,1	sleep3	0	-21	swapper/3	19:08:09	9
713957	2	40	38,1	sleep10	0	-21	swapper/10	19:08:00	2
714560	99	39	37,2	cyclictest	1037006	-21	kworker/u32:4+events_unbound	00:21:34	11
714560	99	39	37,2	cyclictest	1037006	-21	kworker/u32:4+events_unbound	00:21:33	11
714046	2	39	37,1	sleep0	0	-21	swapper/0	19:08:55	0
713900	2	39	35,2	sleep6	0	-21	swapper/6	19:07:25	12
713780	2	39	37,1	sleep13	0	-21	swapper/13	19:05:55	5
714554	99	38	35,2	cyclictest	928274	-21	kworker/u32:1+flush-259:0	22:47:44	9
713886	2	38	36,1	sleep12	0	-21	swapper/12	19:07:14	4
713916	2	37	35,1	sleep5	0	-21	swapper/5	19:07:40	11
713749	2	37	35,1	sleep8	0	-21	swapper/8	19:05:34	14
714585	99	36	35,1	cyclictest	803339	-21	kworker/u32:2+flush-259:0	21:10:15	5
714068	2	36	34,1	sleep15	0	-21	swapper/15	19:09:09	7
714585	99	35	35,0	cyclictest	0	-21	swapper/13	00:05:10	5
714585	99	35	31,4	cyclictest	1037006	-21	kworker/u32:4+flush-259:0	00:18:33	5
714577	99	35	33,2	cyclictest	1073848	-21	kworker/u32:1+events_unbound	00:35:18	3
714575	99	34	33,1	cyclictest	1043974	-21	kworker/u32:3+flush-259:0	00:19:53	2
714585	99	33	33,0	cyclictest	0	-21	swapper/13	22:11:52	5
714585	99	33	32,1	cyclictest	748739	-21	kworker/u32:0+events_unbound	21:16:10	5
714585	99	33	0,31	cyclictest	1161449	-21	thunderbird	22:35:25	5
714581	99	33	31,2	cyclictest	1037006	-21	kworker/u32:4+flush-259:0	00:24:50	4
714581	99	33	31,2	cyclictest	1037006	-21	kworker/u32:4+flush-259:0	00:24:49	4
714562	99	33	28,4	cyclictest	1774	-21	snmpd	20:02:50	12
714560	99	33	31,2	cyclictest	768069	-21	kworker/u32:1+flush-259:0	20:40:21	11
714560	99	33	29,3	cyclictest	1774	-21	snmpd	23:11:28	11
714560	99	33	0,1	cyclictest	0	-21	swapper/5	23:06:14	11
713913	2	33	31,1	sleep2	0	-21	swapper/2	19:07:36	8
714591	99	32	29,2	cyclictest	1161449	-21	thunderbird	22:55:49	7
714587	99	32	29,3	cyclictest	0	-21	swapper/14	19:55:16	6
714585	99	32	32,0	cyclictest	0	-21	swapper/13	22:09:51	5
714585	99	32	31,1	cyclictest	723448	-21	kworker/u32:1+events_unbound	19:30:24	5
714585	99	32	31,1	cyclictest	0	-21	swapper/13	23:29:03	5
714585	99	32	30,2	cyclictest	1043974	-21	kworker/u32:3+events_unbound	00:11:57	5
714581	99	32	30,1	cyclictest	1774	-21	snmpd	00:27:50	4
714581	99	32	30,1	cyclictest	1774	-21	snmpd	00:27:49	4
714577	99	32	31,1	cyclictest	858598	-21	kworker/u32:1+flush-259:0	22:07:17	3
714575	99	32	30,1	cyclictest	799165	-21	kworker/10:0+events	21:02:08	2
714562	99	32	0,31	cyclictest	0	-21	swapper/6	21:43:43	12
714562	99	32	0,0	cyclictest	0	-21	swapper/6	22:46:28	12
714560	99	32	0,30	cyclictest	0	-21	swapper/5	22:32:51	11
714554	99	32	0,29	cyclictest	0	-21	swapper/3	21:45:14	9
714544	99	32	31,1	cyclictest	851893	-21	kworker/u32:3+flush-259:0	22:35:22	0
713874	2	32	30,1	sleep1	0	-21	swapper/1	19:07:04	1
714591	99	31	0,30	cyclictest	0	-21	swapper/15	00:35:16	7
714587	99	31	30,1	cyclictest	1774	-21	snmpd	22:05:57	6
714587	99	31	30,1	cyclictest	1774	-21	snmpd	21:49:05	6
714587	99	31	29,1	cyclictest	1774	-21	snmpd	19:48:29	6
714587	99	31	29,1	cyclictest	1774	-21	snmpd	19:35:47	6
714585	99	31	3,28	cyclictest	0	-21	swapper/13	23:05:11	5
714585	99	31	31,0	cyclictest	0	-21	swapper/13	19:53:36	5
714585	99	31	31,0	cyclictest	0	-21	swapper/13	19:16:45	5
714575	99	31	30,1	cyclictest	942695	-21	kworker/10:2+events	23:26:06	2
714575	99	31	30,1	cyclictest	1064173	-21	kworker/10:1+events	00:37:30	2
714575	99	31	30,1	cyclictest	1057214	-21	kworker/10:0+events	00:23:40	2
714575	99	31	30,1	cyclictest	1057214	-21	kworker/10:0+events	00:23:39	2
714575	99	31	29,1	cyclictest	942695	-21	kworker/10:2+events	23:51:37	2
714575	99	31	29,1	cyclictest	834803	-21	kworker/10:1+events	21:56:44	2
714575	99	31	29,1	cyclictest	723658	-21	kworker/10:0+events	19:40:13	2
714575	99	31	0,2	cyclictest	1161449	-21	thunderbird	21:14:08	2
714569	99	31	0,30	cyclictest	0	-21	swapper/8	22:14:45	14
714569	99	31	0,30	cyclictest	0	-21	swapper/8	21:56:11	14
714569	99	31	0,30	cyclictest	0	-21	swapper/8	21:45:21	14
714569	99	31	0,30	cyclictest	0	-21	swapper/8	20:50:14	14
714562	99	31	0,30	cyclictest	0	-21	swapper/6	23:34:20	12
714562	99	31	0,0	cyclictest	0	-21	swapper/6	20:05:07	12
714560	99	31	3,0	cyclictest	0	-21	swapper/5	22:46:28	11
714556	99	31	0,30	cyclictest	0	-21	swapper/4	22:42:16	10
714554	99	31	30,1	cyclictest	1774	-21	snmpd	20:56:08	9
714554	99	31	0,28	cyclictest	0	-21	swapper/3	21:05:15	9
714551	99	31	30,1	cyclictest	0	-21	swapper/2	22:07:39	8
714551	99	31	0,28	cyclictest	0	-21	swapper/2	22:58:31	8
714549	99	31	30,1	cyclictest	1774	-21	snmpd	23:29:15	1
714544	99	31	0,30	cyclictest	0	-21	swapper/0	22:40:15	0
714544	99	31	0,30	cyclictest	0	-21	swapper/0	00:13:59	0
714591	99	30	0,30	cyclictest	0	-21	swapper/15	22:40:56	7
714591	99	30	0,30	cyclictest	0	-21	swapper/15	20:03:17	7
714587	99	30	29,1	cyclictest	1774	-21	snmpd	23:05:52	6
714587	99	30	29,1	cyclictest	1774	-21	snmpd	20:47:58	6
714587	99	30	28,1	cyclictest	0	-21	swapper/14	20:12:36	6
714585	99	30	30,0	cyclictest	0	-21	swapper/13	22:57:51	5
714585	99	30	30,0	cyclictest	0	-21	swapper/13	22:54:06	5
714585	99	30	29,1	cyclictest	794695	-21	kworker/u32:3+events_unbound	20:45:17	5
714585	99	30	29,1	cyclictest	1062762	-21	ssh	00:21:20	5
714585	99	30	29,1	cyclictest	1062762	-21	ssh	00:21:19	5
714585	99	30	0,30	cyclictest	0	-21	swapper/13	22:17:15	5
714585	99	30	0,27	cyclictest	0	-21	swapper/13	23:10:24	5
714585	99	30	0,1	cyclictest	0	-21	swapper/13	21:02:37	5
714581	99	30	29,1	cyclictest	968239	-21	kworker/u32:2+events_unbound	23:25:18	4
714581	99	30	29,1	cyclictest	1774	-21	snmpd	21:59:17	4
714581	99	30	29,1	cyclictest	1774	-21	snmpd	20:11:43	4
714581	99	30	29,1	cyclictest	1774	-21	snmpd	19:11:11	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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