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 Sun May 03, 2026 00:44:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1358661	99	135	120,11	cyclictest	53	-21	kswapd0	21:55:10	0
1358662	99	98	91,5	cyclictest	1475706	-21	kworker/u4:2+events_unbound	23:18:03	1
1358662	99	88	79,7	cyclictest	1514754	-21	kworker/u4:3+events_unbound	23:53:09	1
1358661	99	87	50,26	cyclictest	53	-21	kswapd0	00:30:09	0
1358661	99	84	33,38	cyclictest	0	-21	swapper/0	22:15:24	0
1358662	99	82	74,6	cyclictest	1558221	-21	kworker/u4:0+events_unbound	00:33:20	1
1358661	99	76	1,47	cyclictest	1439305	-21	/usr/sbin/munin	22:05:38	0
1358661	99	74	2,46	cyclictest	1421358	-21	ssh	21:45:27	0
1358661	99	74	2,44	cyclictest	1381928	-21	apt-get	20:40:10	0
1358661	99	74	23,39	cyclictest	0	-21	swapper/0	23:30:31	0
1358661	99	73	1,51	cyclictest	1477501	-21	modprobe	22:50:00	0
1358661	99	73	1,36	cyclictest	1534813	-21	ntpq	23:55:27	0
1358662	99	71	2,61	cyclictest	1443371	-21	sh	22:10:29	1
1358661	99	70	40,27	cyclictest	1461544	-21	/usr/sbin/munin	22:30:41	0
1358661	99	70	1,45	cyclictest	1483022	-21	ntp_states	22:55:34	0
1358661	99	69	2,41	cyclictest	1559849	-21	ssh	00:24:58	0
1358661	99	69	16,29	cyclictest	256	50	irq/23-42890000.ethernet	21:15:27	0
1358661	99	69	1,45	cyclictest	1490616	-21	cut	23:05:01	0
1358662	99	67	60,5	cyclictest	1377888	-21	kworker/u4:6+events_unbound	21:22:37	1
1358661	99	67	36,28	cyclictest	1567030	-21	kworker/u4:1-rpciod	00:35:19	0
1358661	99	67	35,30	cyclictest	1393911	-21	latency_hist	21:15:00	0
1358661	99	67	1,44	cyclictest	1459906	-21	sh	22:30:00	0
1358661	99	66	17,26	cyclictest	256	50	irq/23-42890000.ethernet	22:20:26	0
1358661	99	66	1,44	cyclictest	1561464	-21	head	00:25:43	0
1358661	99	66	1,41	cyclictest	1465316	-21	ntpq	22:35:27	0
1358662	99	65	57,6	cyclictest	1475705	-21	kworker/u4:0+events_unbound	22:52:57	1
1358662	99	65	56,6	cyclictest	1489006	-21	kworker/u4:15+events_unbound	23:03:00	1
1358661	99	65	1,58	cyclictest	1387037	-21	apt-get	21:00:13	0
1358661	99	65	1,42	cyclictest	0	-21	swapper/0	22:40:28	0
1358662	99	64	54,7	cyclictest	1358658	-21	cyclictest	22:44:25	1
1358661	99	64	20,25	cyclictest	256	50	irq/23-42890000.ethernet	21:25:16	0
1358661	99	64	1,56	cyclictest	1380629	-21	apt-get	20:35:12	0
1358661	99	64	1,51	cyclictest	0	-21	swapper/0	23:25:29	0
1358661	99	64	1,41	cyclictest	1477812	-21	ssh	22:50:09	0
1358661	99	64	1,31	cyclictest	1400029	-21	users	21:20:44	0
1358661	99	63	35,25	cyclictest	0	-21	swapper/0	23:10:20	0
1358661	99	63	32,29	cyclictest	1517135	-21	diskmemload	23:35:19	0
1358661	99	63	32,28	cyclictest	0	-21	swapper/0	23:50:30	0
1358661	99	63	1,42	cyclictest	1504405	-21	ssh	23:20:22	0
1358661	99	63	1,41	cyclictest	1499696	-21	ssh	23:15:16	0
1358661	99	63	1,41	cyclictest	1407955	-21	ssh	21:30:31	0
1358661	99	63	1,40	cyclictest	1416949	-21	ntpq	21:40:24	0
1358661	99	63	1,40	cyclictest	1416949	-21	ntpq	21:40:24	0
1358661	99	62	2,54	cyclictest	1370398	-21	apt-get	19:55:12	0
1358661	99	62	2,52	cyclictest	1361393	-21	apt-get	19:20:12	0
1358661	99	62	2,36	cyclictest	37	-21	kcompactd0	23:06:38	0
1358661	99	62	1,57	cyclictest	1525469	-21	apt-get	23:45:11	0
1358661	99	62	1,43	cyclictest	1374783	-21	ntpq	20:10:23	0
1358662	99	61	53,6	cyclictest	1466757	-21	kworker/u4:1+events_unbound	22:37:54	1
1358661	99	61	52,6	cyclictest	1538827	-21	fschecks_count	00:00:19	0
1358661	99	61	3,53	cyclictest	1363214	-21	ntpq	19:25:25	0
1358661	99	61	31,26	cyclictest	1555675	-21	date	00:20:02	0
1358661	99	61	1,58	cyclictest	1521930	-21	ntpq	23:40:29	0
1358661	99	61	1,55	cyclictest	1388310	-21	apt-get	21:05:12	0
1358662	99	60	53,5	cyclictest	1431611	-21	kworker/u4:6+events_unbound	21:57:44	1
1358662	99	60	51,6	cyclictest	1495488	-21	/usr/sbin/munin	23:10:19	1
1358661	99	60	1,43	cyclictest	1383836	-21	ntpq	20:45:33	0
1358661	99	60	1,42	cyclictest	1433906	-21	aten_r7power_po	22:00:16	0
1358662	99	59	47,9	cyclictest	37	-21	kcompactd0	22:25:33	1
1358661	99	59	2,52	cyclictest	1360647	-21	ntpq	19:15:26	0
1358661	99	59	1,56	cyclictest	1367856	-21	apt-get	19:45:16	0
1358661	99	59	1,56	cyclictest	1367856	-21	apt-get	19:45:16	0
1358661	99	59	1,51	cyclictest	1376817	-21	apt-get	20:20:10	0
1358661	99	59	1,51	cyclictest	1376817	-21	apt-get	20:20:10	0
1358662	99	58	51,6	cyclictest	1358587	-21	kworker/u4:0+events_unbound	19:12:19	1
1358662	99	58	50,6	cyclictest	1479524	-21	kworker/u4:8+events_unbound	23:28:05	1
1358662	99	58	47,9	cyclictest	1440876	-21	systemd	22:07:45	1
1358661	99	58	3,50	cyclictest	1379948	-21	ntpq	20:30:28	0
1358661	99	58	3,40	cyclictest	1369783	-21	ntpq	19:50:33	0
1358661	99	58	29,25	cyclictest	0	-21	swapper/0	20:15:18	0
1358661	99	58	28,27	cyclictest	1395893	-21	kworker/u4:2+rpciod	21:35:20	0
1358661	99	58	28,27	cyclictest	0	-21	swapper/0	20:55:29	0
1358661	99	58	11,26	cyclictest	0	-21	swapper/0	22:10:28	0
1358661	99	57	3,50	cyclictest	1365288	-21	apt-get	19:35:12	0
1358661	99	57	3,48	cyclictest	1378090	-21	apt-get	20:25:09	0
1358661	99	57	26,27	cyclictest	0	-21	swapper/0	19:30:40	0
1358661	99	57	2,52	cyclictest	1373505	-21	ntpq	20:05:23	0
1358661	99	57	2,51	cyclictest	1367226	-21	ntpq	19:40:31	0
1358662	99	56	46,8	cyclictest	315	-21	systemd-journal	23:43:07	1
1358661	99	56	2,49	cyclictest	1384471	-21	apt-get	20:50:12	0
1358661	99	56	2,37	cyclictest	1551198	-21	munin-run	00:15:01	0
1358662	99	55	47,6	cyclictest	53	-21	kswapd0	22:20:00	1
1358662	99	55	47,5	cyclictest	0	-21	swapper/1	21:30:17	1
1358661	99	55	2,49	cyclictest	1426595	-21	ssh	21:51:04	0
1358661	99	55	2,49	cyclictest	1372282	-21	ntpq	20:00:27	0
1358661	99	55	1,36	cyclictest	1546840	-21	apt	00:10:00	0
1358662	99	54	47,5	cyclictest	1384266	-21	kworker/u4:8+events_unbound	20:50:01	1
1358662	99	54	46,6	cyclictest	1358588	-21	kworker/u4:1+events_unbound	19:27:18	1
1358662	99	54	45,6	cyclictest	1356149	-21	kworker/u4:5+events_unbound	19:20:01	1
1358661	99	54	3,46	cyclictest	1359439	-21	ntpq	19:10:29	0
1358662	99	53	44,6	cyclictest	1404951	-21	kworker/u4:9+events_unbound	21:55:00	1
1358662	99	53	43,8	cyclictest	1405705	-21	sshd	21:27:36	1
1358662	99	52	44,6	cyclictest	1514755	-21	kworker/u4:4+events_unbound	00:15:01	1
1358662	99	52	43,6	cyclictest	1385561	-21	modprobe	20:55:00	1
1358662	99	52	36,5	cyclictest	1475709	-21	kworker/u4:7+events_unbound	23:08:01	1
1358662	99	51	45,4	cyclictest	1552472	-21	sendmail_mailqu	00:15:38	1
1358662	99	51	44,5	cyclictest	1365086	-21	kworker/u4:13+events_unbound	20:12:23	1
1358662	99	51	43,6	cyclictest	1365086	-21	kworker/u4:13+events_unbound	19:42:20	1
1358662	99	51	38,8	cyclictest	0	-21	swapper/1	23:35:19	1
1358662	99	51	17,25	cyclictest	0	-21	swapper/1	21:45:34	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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