OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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 rack0slot2.osadl.org (updated Thu Jul 16, 2026 00:43:30)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
569322	2	100	0,1	sleep7	569323	-21	grep	00:10:14	7
174601	2	72	0,1	sleep5	0	-21	swapper/5	21:30:08	5
4080147	2	56	45,8	sleep4	0	-21	swapper/4	19:08:10	4
4080244	2	54	19,30	sleep7	0	-21	swapper/7	19:09:34	7
4079949	2	51	40,7	sleep5	0	-21	swapper/5	19:05:31	5
4080555	99	38	35,2	cyclictest	540583	-21	iostat	00:00:06	7
4079957	2	37	27,7	sleep6	0	-21	swapper/6	19:05:32	6
4080549	99	36	34,2	cyclictest	576415	-21	kworker/u16:4+events_unbound	00:30:21	5
503632	2	35	0,1	chrt	0	-21	swapper/4	23:45:03	4
4080555	99	35	34,0	cyclictest	0	-21	swapper/7	23:28:01	7
4080555	99	33	32,0	cyclictest	0	-21	swapper/7	21:47:01	7
4080555	99	33	31,1	cyclictest	478657	-21	ssh	23:35:01	7
4080549	99	33	31,2	cyclictest	230933	-21	kworker/u16:4+events_unbound	23:40:10	5
4080549	99	33	30,2	cyclictest	230933	-21	kworker/u16:4+flush-8:0	22:50:01	5
4080552	99	32	30,2	cyclictest	4181389	-21	kworker/u16:1+events_unbound	20:35:06	6
4080549	99	32	30,2	cyclictest	295368	-21	kworker/u16:2+flush-8:0	22:24:01	5
4080549	99	32	29,2	cyclictest	576415	-21	kworker/u16:4+flush-8:0	00:15:12	5
4080555	99	31	30,0	cyclictest	0	-21	swapper/7	23:43:37	7
4080555	99	31	30,0	cyclictest	0	-21	swapper/7	23:07:02	7
4080555	99	31	30,0	cyclictest	0	-21	swapper/7	22:25:09	7
4080555	99	31	30,0	cyclictest	0	-21	swapper/7	21:13:02	7
4080555	99	31	27,2	cyclictest	585062	-21	ntpq	00:15:17	7
4080555	99	30	29,0	cyclictest	0	-21	swapper/7	22:49:41	7
4080555	99	30	28,1	cyclictest	0	-21	swapper/7	23:31:48	7
4080549	99	30	28,2	cyclictest	394376	-21	kworker/u16:0+events_unbound	23:32:01	5
4080549	99	30	27,2	cyclictest	222316	-21	kworker/u16:2+flush-8:0	21:55:01	5
4080555	99	29	28,0	cyclictest	0	-21	swapper/7	23:04:22	7
4080555	99	29	28,0	cyclictest	0	-21	swapper/7	23:04:22	7
4080555	99	29	28,0	cyclictest	0	-21	swapper/7	21:59:41	7
4080552	99	29	27,2	cyclictest	535957	-21	kworker/u16:2+events_unbound	23:58:36	6
4080549	99	29	27,2	cyclictest	4122870	-21	kworker/u16:0+flush-8:0	19:30:17	5
4080549	99	29	26,2	cyclictest	295368	-21	kworker/u16:2+flush-8:0	22:40:01	5
4080555	99	28	27,0	cyclictest	0	-21	swapper/7	19:40:01	7
4080555	99	28	25,2	cyclictest	561770	-21	ssh	00:06:13	7
4080549	99	28	26,2	cyclictest	85528	-21	kworker/u16:2+events_unbound	21:11:01	5
4080549	99	28	26,2	cyclictest	535957	-21	kworker/u16:2+events_unbound	00:00:51	5
4080549	99	28	26,2	cyclictest	503072	-21	kworker/u16:1+events_unbound	23:54:02	5
4080549	99	28	26,2	cyclictest	158194	-21	kworker/u16:0+events_unbound	21:53:02	5
232647	2	28	0,1	chrt	232646	-21	ssh	21:52:22	7
4080555	99	27	26,0	cyclictest	0	-21	swapper/7	22:37:01	7
4080555	99	27	26,0	cyclictest	0	-21	swapper/7	00:21:00	7
4080555	99	27	25,1	cyclictest	0	-21	swapper/7	22:18:49	7
4080555	99	27	25,1	cyclictest	0	-21	swapper/7	22:12:29	7
4080555	99	27	24,2	cyclictest	64606	-21	/usr/sbin/munin	20:35:14	7
4080552	99	27	25,2	cyclictest	576415	-21	kworker/u16:4+events_unbound	00:32:58	6
4080552	99	27	25,2	cyclictest	197714	-21	kworker/u16:2+events_unbound	21:40:36	6
4080549	99	27	26,1	cyclictest	394376	-21	kworker/u16:0+events_unbound	23:55:21	5
4080549	99	27	25,2	cyclictest	93957	-21	kworker/u16:3+events_unbound	21:05:25	5
4080549	99	27	25,2	cyclictest	535957	-21	kworker/u16:2+events_unbound	00:08:01	5
4080549	99	27	25,2	cyclictest	441765	-21	kworker/u16:2+flush-8:0	23:20:53	5
4080549	99	27	25,2	cyclictest	295368	-21	kworker/u16:2+flush-8:0	22:30:11	5
4080549	99	27	25,2	cyclictest	295368	-21	kworker/u16:2+events_unbound	22:35:21	5
4080555	99	26	25,0	cyclictest	0	-21	swapper/7	22:52:41	7
4080555	99	26	25,0	cyclictest	0	-21	swapper/7	21:42:25	7
4080555	99	26	24,1	cyclictest	0	-21	swapper/7	22:00:11	7
4080555	99	26	23,2	cyclictest	124031	-21	diskmemload	21:35:13	7
4080549	99	26	23,2	cyclictest	576415	-21	kworker/u16:4+flush-8:0	00:25:01	5
4080555	99	25	24,0	cyclictest	0	-21	swapper/7	23:19:29	7
4080555	99	25	24,0	cyclictest	0	-21	swapper/7	22:58:30	7
4080555	99	25	24,0	cyclictest	0	-21	swapper/7	22:58:30	7
4080555	99	25	24,0	cyclictest	0	-21	swapper/7	22:08:38	7
4080555	99	25	24,0	cyclictest	0	-21	swapper/7	21:22:02	7
4080555	99	25	23,1	cyclictest	0	-21	swapper/7	23:20:41	7
4080552	99	25	23,2	cyclictest	271141	-21	kworker/u16:1+events_unbound	22:24:59	6
4080549	99	25	23,2	cyclictest	4171316	-21	kworker/u16:0+flush-8:0	19:55:10	5
4080549	99	25	23,2	cyclictest	405110	-21	kworker/u16:1+events_unbound	23:11:01	5
4080549	99	25	22,2	cyclictest	368507	-21	kworker/u16:3+events_unbound	23:14:53	5
4080547	99	25	21,3	cyclictest	246737	-21	munin-node	22:00:03	4
4080555	99	24	23,0	cyclictest	0	-21	swapper/7	23:56:50	7
4080555	99	24	23,0	cyclictest	0	-21	swapper/7	20:00:54	7
4080552	99	24	22,2	cyclictest	368507	-21	kworker/u16:3+events_unbound	23:21:18	6
4080549	99	24	22,2	cyclictest	535957	-21	kworker/u16:2+flush-8:0	00:20:01	5
4080549	99	24	22,2	cyclictest	158194	-21	kworker/u16:0+events_unbound	21:45:21	5
4080555	99	23	22,0	cyclictest	0	-21	swapper/7	22:32:58	7
4080555	99	23	22,0	cyclictest	0	-21	swapper/7	19:35:02	7
4080555	99	23	21,1	cyclictest	634947	-21	ssh	00:36:17	7
4080555	99	23	21,1	cyclictest	355421	-21	ssh	22:43:37	7
4080555	99	23	18,4	cyclictest	648	-21	systemd-journal	20:29:51	7
4080552	99	23	21,2	cyclictest	535957	-21	kworker/u16:2+events_unbound	00:24:47	6
4080552	99	23	21,2	cyclictest	441765	-21	kworker/u16:2+events_unbound	23:33:55	6
4080552	99	23	21,2	cyclictest	394376	-21	kworker/u16:0+events_unbound	23:54:24	6
4080552	99	23	21,2	cyclictest	319735	-21	kworker/u16:0+flush-8:0	22:44:15	6
4080552	99	23	21,2	cyclictest	319735	-21	kworker/u16:0+events_unbound	22:49:54	6
4080552	99	23	21,2	cyclictest	222316	-21	kworker/u16:2+flush-8:0	21:53:44	6
4080552	99	23	21,2	cyclictest	222316	-21	kworker/u16:2+events_unbound	22:06:12	6
4080552	99	23	21,2	cyclictest	158194	-21	kworker/u16:0+events_unbound	21:57:30	6
4080552	99	23	21,2	cyclictest	114679	-21	kworker/u16:4+events_unbound	21:25:02	6
4080549	99	23	21,2	cyclictest	4181389	-21	kworker/u16:1+flush-8:0	20:25:13	5
4080549	99	23	21,2	cyclictest	222316	-21	kworker/u16:2+flush-8:0	22:00:06	5
4080555	99	22	21,0	cyclictest	0	-21	swapper/7	20:30:54	7
4080555	99	22	21,0	cyclictest	0	-21	swapper/7	00:25:56	7
4080555	99	22	0,20	cyclictest	427888	-21	sh	23:12:17	7
4080549	99	22	20,2	cyclictest	158194	-21	kworker/u16:0+flush-8:0	22:09:41	5
4080549	99	22	20,2	cyclictest	114679	-21	kworker/u16:4+events_unbound	21:20:01	5
4080555	99	21	0,19	cyclictest	5831	-21	gnome-shell	00:30:00	7
4080552	99	21	19,2	cyclictest	4151190	-21	kworker/u16:4+flush-8:0	20:06:33	6
4080552	99	21	19,2	cyclictest	4122870	-21	kworker/u16:0+events_unbound	19:28:41	6
4080552	99	21	19,2	cyclictest	380963	-21	kworker/u16:2+events_unbound	22:57:04	6
4080552	99	21	19,2	cyclictest	380963	-21	kworker/u16:2+events_unbound	22:57:04	6
4080549	99	21	19,2	cyclictest	453959	-21	kworker/u16:5+events_unbound	23:47:20	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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