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 Fri Aug 14, 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
1382072	99	78	72,6	cyclictest	1538777	-21	kworker/u32:3+flush-259:0	22:25:01	13
1382096	99	77	73,4	cyclictest	1603945	-21	kworker/u32:1+flush-259:0	00:13:50	7
1382096	99	74	71,2	cyclictest	1487606	-21	kworker/u32:5+flush-259:0	21:48:43	7
1742529	2	60	0,0	sleep9	0	-21	swapper/9	00:30:25	15
1381442	2	57	55,1	sleep4	0	-21	swapper/4	19:07:22	10
1382089	99	50	49,1	cyclictest	1570669	-21	kworker/u32:2+events_unbound	22:24:38	5
1382087	99	50	46,3	cyclictest	1603945	-21	kworker/u32:1+events_unbound	23:03:02	4
1382087	99	50	46,3	cyclictest	1603945	-21	kworker/u32:1+events_unbound	23:03:02	4
4189	98	49	0,47	rtkit-daemon	0	-21	swapper/0	19:07:32	0
1381427	2	49	47,1	sleep15	0	-21	swapper/15	19:07:18	7
1382066	99	45	44,1	cyclictest	1403813	-21	kworker/u32:2+events_unbound	19:51:02	11
1382063	99	45	43,2	cyclictest	1633160	-21	kworker/u32:2+events_unbound	23:33:44	10
1381580	2	45	43,1	sleep5	0	-21	swapper/5	19:09:15	11
1381565	2	45	43,1	sleep9	0	-21	swapper/9	19:09:04	15
1382066	99	44	43,1	cyclictest	1667262	-21	kworker/u32:0+flush-259:0	23:40:10	11
1382061	99	44	42,2	cyclictest	1487606	-21	kworker/u32:5+events_unbound	21:44:38	9
1381542	2	43	40,1	sleep7	0	-21	swapper/7	19:08:45	13
1382084	99	41	39,2	cyclictest	1684174	-21	kworker/u32:3+flush-259:0	00:12:33	3
1382061	99	41	39,2	cyclictest	1538777	-21	kworker/u32:3+events_unbound	22:15:23	9
1381364	2	41	39,1	sleep10	0	-21	swapper/10	19:06:24	2
1382061	99	39	36,1	cyclictest	21	1	rcu_preempt	23:29:37	9
1381630	2	39	33,1	sleep12	0	-21	swapper/12	19:09:55	4
1381614	2	39	37,1	sleep14	0	-21	swapper/14	19:09:41	6
1381463	2	39	36,2	sleep8	0	-21	swapper/8	19:07:43	14
1381306	2	39	37,1	sleep2	0	-21	swapper/2	19:05:45	8
1382055	99	38	24,9	cyclictest	0	-21	swapper/1	22:10:15	1
1382051	99	37	36,1	cyclictest	0	-21	swapper/0	22:50:16	0
1382051	99	37	36,1	cyclictest	0	-21	swapper/0	22:50:16	0
1379513	2	37	35,1	sleep3	0	-21	swapper/3	19:05:13	9
1382075	99	36	27,8	cyclictest	1774	-21	snmpd	21:18:18	14
1382063	99	36	35,1	cyclictest	1487606	-21	kworker/u32:5+events_unbound	22:55:15	10
1382063	99	36	35,1	cyclictest	1487606	-21	kworker/u32:5+events_unbound	22:55:14	10
1382061	99	36	36,0	cyclictest	0	-21	swapper/3	22:05:05	9
1381488	2	36	33,2	sleep13	0	-21	swapper/13	19:08:04	5
1381347	2	36	34,1	sleep1	0	-21	swapper/1	19:06:15	1
1382096	99	35	32,2	cyclictest	1633160	-21	kworker/u32:2+flush-259:0	23:44:23	7
1382075	99	35	29,6	cyclictest	1620075	-21	mii-tool	22:55:14	14
1382075	99	35	29,6	cyclictest	1620075	-21	mii-tool	22:55:14	14
1382057	99	35	32,3	cyclictest	0	-21	swapper/2	22:07:45	8
1377970	2	35	31,2	sleep6	0	-21	swapper/6	19:05:00	12
1382093	99	34	33,1	cyclictest	1487606	-21	kworker/u32:5+flush-259:0	21:35:15	6
1382057	99	34	28,3	cyclictest	1161449	-21	thunderbird	23:14:09	8
1381449	2	34	32,1	sleep11	0	-21	swapper/11	19:07:29	3
1382087	99	33	3,29	cyclictest	0	-21	swapper/12	20:10:08	4
1382087	99	33	32,1	cyclictest	1380116	-21	kworker/u32:3+events_unbound	19:22:08	4
1382063	99	33	33,0	cyclictest	0	-21	swapper/4	00:38:10	10
1382063	99	33	32,1	cyclictest	1161449	-21	thunderbird	23:28:10	10
1382063	99	33	31,2	cyclictest	1487606	-21	kworker/u32:5+events_unbound	22:15:27	10
1382063	99	33	31,2	cyclictest	1403813	-21	kworker/u32:2+events_unbound	19:57:43	10
1382063	99	33	31,2	cyclictest	1403813	-21	kworker/u32:2+events_unbound	19:57:42	10
1382061	99	33	32,1	cyclictest	1538777	-21	kworker/u32:3+events_unbound	22:57:18	9
1382061	99	33	32,1	cyclictest	1538777	-21	kworker/u32:3+events_unbound	22:57:18	9
1382061	99	33	31,2	cyclictest	1453849	-21	kworker/u32:2+flush-259:0	21:20:19	9
1382057	99	33	30,2	cyclictest	1161508	-21	Softwar~cThread	23:52:54	8
1382057	99	33	29,2	cyclictest	782	-21	systemd-journal	19:42:13	8
1382057	99	33	29,2	cyclictest	1540527	-21	ssh	21:54:00	8
1382057	99	33	1,29	cyclictest	42	1	ktimers/2	19:52:53	8
1382057	99	33	0,32	cyclictest	0	-21	swapper/2	20:15:38	8
1382057	99	33	0,30	cyclictest	1520433	-21	ssh	21:37:09	8
1382057	99	33	0,29	cyclictest	0	-21	swapper/2	20:26:28	8
1382093	99	32	0,29	cyclictest	0	-21	swapper/14	21:10:16	6
1382087	99	32	31,1	cyclictest	3318	-21	Xorg	22:53:13	4
1382087	99	32	31,1	cyclictest	3318	-21	Xorg	22:53:13	4
1382063	99	32	32,0	cyclictest	0	-21	swapper/4	23:51:05	10
1382063	99	32	31,1	cyclictest	1603945	-21	kworker/u32:1+events_unbound	00:10:13	10
1382063	99	32	31,1	cyclictest	1441568	-21	kworker/u32:1+events_unbound	20:34:33	10
1382061	99	32	32,0	cyclictest	0	-21	swapper/3	23:19:39	9
1382061	99	32	32,0	cyclictest	0	-21	swapper/3	22:31:38	9
1382061	99	32	32,0	cyclictest	0	-21	swapper/3	22:13:46	9
1382061	99	32	32,0	cyclictest	0	-21	swapper/3	22:01:04	9
1382061	99	32	31,1	cyclictest	1511114	-21	kworker/u32:0+events_unbound	21:30:23	9
1382057	99	32	28,1	cyclictest	1161449	-21	thunderbird	20:47:18	8
1382057	99	32	0,31	cyclictest	1161449	-21	thunderbird	22:40:16	8
1382057	99	32	0,30	cyclictest	1161449	-21	thunderbird	21:32:19	8
1382057	99	32	0,30	cyclictest	1161449	-21	thunderbird	20:02:55	8
1382057	99	32	0,30	cyclictest	1161449	-21	thunderbird	20:02:54	8
1382057	99	32	0,29	cyclictest	0	-21	swapper/2	23:36:58	8
1382057	99	32	0,29	cyclictest	0	-21	swapper/2	23:22:57	8
1382057	99	32	0,29	cyclictest	0	-21	swapper/2	23:03:05	8
1382057	99	32	0,29	cyclictest	0	-21	swapper/2	23:03:05	8
1382057	99	32	0,29	cyclictest	0	-21	swapper/2	22:33:02	8
1382057	99	32	0,29	cyclictest	0	-21	swapper/2	20:36:14	8
1382093	99	31	0,30	cyclictest	0	-21	swapper/14	21:01:12	6
1382089	99	31	0,30	cyclictest	0	-21	swapper/13	23:16:00	5
1382087	99	31	31,0	cyclictest	0	-21	swapper/12	21:15:49	4
1382087	99	31	30,1	cyclictest	1738156	-21	kworker/u32:0+events_unbound	00:31:38	4
1382087	99	31	1,30	cyclictest	132	1	ktimers/12	23:12:03	4
1382084	99	31	30,1	cyclictest	1774	-21	snmpd	19:42:05	3
1382084	99	31	28,2	cyclictest	1161449	-21	thunderbird	23:20:28	3
1382084	99	31	0,29	cyclictest	0	-21	swapper/11	21:00:12	3
1382082	99	31	30,1	cyclictest	1774	-21	snmpd	20:08:58	2
1382082	99	31	30,1	cyclictest	1659122	-21	kworker/10:2+events	23:46:02	2
1382082	99	31	30,1	cyclictest	1521750	-21	kworker/10:0+events	22:03:41	2
1382077	99	31	30,1	cyclictest	1570669	-21	kworker/u32:2+flush-259:0	22:21:32	15
1382077	99	31	0,30	cyclictest	0	-21	swapper/9	21:30:17	15
1382075	99	31	30,1	cyclictest	1774	-21	snmpd	21:25:27	14
1382075	99	31	30,1	cyclictest	1456825	-21	nodev-device-ev	20:35:18	14
1382075	99	31	30,1	cyclictest	1292272	-1	kworker/u33:1+i915_flip	23:42:08	14
1382075	99	31	25,1	cyclictest	1774	-21	snmpd	23:46:16	14
1382075	99	31	0,30	cyclictest	0	-21	swapper/8	22:42:33	14
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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