OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #7, slot #2

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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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot2.osadl.org (updated Tue Jul 21, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1350770	99	88	73,12	cyclictest	1415702	-21	kworker/u4:7+events_unbound	22:02:31	0
1350770	99	87	79,6	cyclictest	1491170	-21	kworker/u4:12+events_unbound	23:12:43	0
1350770	99	79	71,6	cyclictest	1533538	-21	acpi	00:00:13	0
1350770	99	77	66,8	cyclictest	256	50	irq/23-42890000.ethernet	22:25:31	0
1350770	99	71	58,10	cyclictest	53	-21	kswapd0	23:20:11	0
1350771	99	68	36,30	cyclictest	1529781	-21	ntp_kernel_pll_	23:55:27	1
1350771	99	67	34,30	cyclictest	1365119	-21	aten2__	20:05:21	1
1350771	99	67	33,31	cyclictest	0	-21	swapper/1	23:50:39	1
1350770	99	67	59,6	cyclictest	1562224	-21	kworker/u4:3+events_unbound	00:32:59	0
1350770	99	67	56,7	cyclictest	0	-21	swapper/0	00:35:12	0
1350771	99	66	37,24	cyclictest	1376385	-21	systemd	20:47:19	1
1350771	99	65	30,30	cyclictest	0	-21	swapper/1	22:05:13	1
1350771	99	65	25,35	cyclictest	1387282	-21	ssh	21:15:38	1
1350771	99	64	2,12	cyclictest	1555760	-21	apt-get	00:25:12	1
1350770	99	64	55,6	cyclictest	1454554	-21	switchtime	22:30:41	0
1350770	99	64	49,9	cyclictest	1440424	-21	ssh	22:15:19	0
1350771	99	63	29,31	cyclictest	1373585	-21	threads	20:35:38	1
1350771	99	63	2,11	cyclictest	37	-21	kcompactd0	00:15:37	1
1350770	99	63	55,6	cyclictest	1401940	-21	kworker/u4:1+events_unbound	21:45:00	0
1350771	99	62	53,7	cyclictest	1451230	-21	kworker/u4:12+events_unbound	22:27:35	1
1350771	99	62	2,16	cyclictest	1471265	-21	ssh	22:50:14	1
1350771	99	62	2,14	cyclictest	1413614	-21	ssh	21:45:21	1
1350771	99	61	40,19	cyclictest	1423592	-21	unixbench_multi	21:55:43	1
1350771	99	61	32,27	cyclictest	1526718	-21	kworker/u4:5-rpciod	00:05:34	1
1350771	99	61	3,16	cyclictest	1400588	-21	ssh	21:30:27	1
1350771	99	61	30,28	cyclictest	0	-21	swapper/1	21:40:28	1
1350771	99	61	29,30	cyclictest	1551831	-21	gltestperf	00:20:22	1
1350771	99	61	24,32	cyclictest	0	-21	swapper/1	19:50:02	1
1350771	99	61	2,17	cyclictest	1533553	-21	apt-get	00:00:18	1
1350771	99	61	1,18	cyclictest	1440769	-21	ntpq	22:15:26	1
1350770	99	61	51,8	cyclictest	1526719	-21	kworker/u4:6+events_unbound	00:07:54	0
1350770	99	61	40,6	cyclictest	1473788	-21	kworker/u4:0+events_unbound	22:52:38	0
1350771	99	60	4,16	cyclictest	1480453	-21	ssh	23:00:21	1
1350771	99	60	25,31	cyclictest	0	-21	swapper/1	19:40:16	1
1350771	99	60	2,17	cyclictest	1352777	-21	ntpq	19:15:28	1
1350771	99	60	2,15	cyclictest	1445420	-21	ntpq	22:20:34	1
1350771	99	60	2,15	cyclictest	1427395	-21	ssh	22:00:25	1
1350771	99	60	21,36	cyclictest	0	-21	swapper/1	21:25:13	1
1350770	99	60	52,6	cyclictest	1354574	-21	kworker/u4:12+events_unbound	19:22:09	0
1350771	99	59	5,51	cyclictest	1516159	-21	fschecks_time	23:40:24	1
1350771	99	59	3,7	cyclictest	1494285	-21	ssh	23:15:35	1
1350771	99	59	3,6	cyclictest	1381834	-21	apt-get	21:10:12	1
1350771	99	59	3,14	cyclictest	1520142	-21	apt-get	23:45:13	1
1350771	99	59	29,28	cyclictest	0	-21	swapper/1	22:55:19	1
1350771	99	59	2,17	cyclictest	1459241	-21	ssh	22:35:41	1
1350770	99	59	50,6	cyclictest	1420214	-21	kworker/u4:8+events_unbound	21:57:32	0
1350771	99	58	39,13	cyclictest	1405736	-21	unixbench_singl	21:35:43	1
1350771	99	58	30,26	cyclictest	0	-21	swapper/1	23:20:22	1
1350771	99	58	27,27	cyclictest	0	-21	swapper/1	00:10:30	1
1350771	99	58	2,6	cyclictest	1454432	-21	ps	22:30:39	1
1350771	99	58	26,29	cyclictest	0	-21	swapper/1	00:30:20	1
1350771	99	58	2,16	cyclictest	1507385	-21	ssh	23:30:23	1
1350770	99	58	31,17	cyclictest	0	-21	swapper/0	21:45:12	0
1350771	99	57	49,6	cyclictest	1433770	-21	kworker/u4:8+events_unbound	22:12:33	1
1350771	99	57	3,8	cyclictest	1357938	-21	ntpq	19:35:30	1
1350771	99	57	3,8	cyclictest	1357938	-21	ntpq	19:35:30	1
1350771	99	57	31,23	cyclictest	0	-21	swapper/1	23:25:21	1
1350771	99	57	23,30	cyclictest	0	-21	swapper/1	23:05:37	1
1350771	99	57	22,32	cyclictest	1371609	-21	aten_r7power_vo	20:30:15	1
1350770	99	57	6,35	cyclictest	1436317	-21	ssh	22:10:26	0
1350770	99	57	48,7	cyclictest	1460266	-21	kworker/u4:1+events_unbound	22:41:46	0
1350771	99	56	6,9	cyclictest	1462378	-21	ssh	22:40:13	1
1350771	99	56	3,8	cyclictest	1378479	-21	ntpq	20:55:32	1
1350771	99	56	3,8	cyclictest	1355342	-21	ntpq	19:25:28	1
1350771	99	56	2,7	cyclictest	1512153	-21	ntpq	23:35:41	1
1350771	99	56	22,30	cyclictest	0	-21	swapper/1	22:45:22	1
1350771	99	56	1,8	cyclictest	1488994	-21	ssh	23:10:13	1
1350770	99	56	48,6	cyclictest	1380218	-21	kworker/u4:3+events_unbound	21:12:25	0
1350771	99	55	4,8	cyclictest	1391598	-21	ntpq	21:20:28	1
1350771	99	55	28,24	cyclictest	0	-21	swapper/1	20:50:17	1
1350771	99	55	26,26	cyclictest	0	-21	swapper/1	20:40:34	1
1350771	99	55	18,32	cyclictest	1363549	-21	munin-run	20:00:00	1
1350771	99	55	11,8	cyclictest	1364573	-21	find	20:00:37	1
1350771	99	55	1,14	cyclictest	1379802	-21	ntpq	21:00:35	1
1350770	99	55	9,41	cyclictest	1543229	-21	ssh	00:10:32	0
1350770	99	55	48,5	cyclictest	1357131	-21	kworker/u4:16+events_unbound	19:40:01	0
1350770	99	55	48,5	cyclictest	1357131	-21	kworker/u4:16+events_unbound	19:40:01	0
1350770	99	55	46,7	cyclictest	1551157	-21	latency_hist	00:20:02	0
1350771	99	54	3,11	cyclictest	1366357	-21	apt-get	20:10:15	1
1350771	99	54	22,29	cyclictest	0	-21	swapper/1	00:40:01	1
1350770	99	54	8,40	cyclictest	1405294	-21	sh	21:35:38	0
1350771	99	53	31,19	cyclictest	0	-21	swapper/1	20:25:16	1
1350771	99	53	2,7	cyclictest	1369530	-21	ntpq	20:20:30	1
1350771	99	53	25,25	cyclictest	1361920	-21	mailstats	19:50:37	1
1350771	99	53	2,14	cyclictest	1417751	-21	ssh	21:50:04	1
1350770	99	53	36,11	cyclictest	1399579	-21	modprobe	21:30:00	0
1350770	99	53	21,26	cyclictest	256	50	irq/23-42890000.ethernet	20:05:12	0
1350771	99	52	2,6	cyclictest	1368192	-21	ntpq	20:15:27	1
1350771	99	52	1,7	cyclictest	1356691	-21	ntpq	19:30:32	1
1350771	99	52	14,35	cyclictest	1353852	-21	fschecks_time	19:20:19	1
1350770	99	52	4,26	cyclictest	1517688	-21	kworker/u4:15+rpciod	23:50:26	0
1350770	99	52	41,6	cyclictest	1480407	-21	df_abs	23:00:20	0
1350770	99	52	40,7	cyclictest	53	-21	kswapd0	22:45:16	0
1350771	99	50	3,6	cyclictest	1351520	-21	ntpq	19:10:28	1
1350771	99	50	15,33	cyclictest	1380735	-21	fschecks_time	21:05:20	1
1350770	99	50	43,5	cyclictest	1429268	-21	kworker/u4:0+events_unbound	22:22:36	0
1350770	99	50	42,6	cyclictest	1371656	-21	/usr/sbin/munin	20:30:15	0
1350770	99	50	42,5	cyclictest	1516858	-21	sh	23:40:43	0
1350770	99	50	40,6	cyclictest	1502694	-21	/usr/sbin/munin	23:25:20	0
1350770	99	50	36,9	cyclictest	1421300	-21	ssh	21:53:55	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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