OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #c, slot #4

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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

Characteristics of the 100 highest latencies:

System rackcslot4.osadl.org (updated Mon Aug 10, 2026 00:44:54)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1343200	2	281	214,52	sleep0	0	-21	swapper/0	19:05:20	0
1344647	2	262	189,27	sleep1	0	-21	swapper/1	19:09:32	1
1344849	99	126	120,4	cyclictest	1419946	-21	kworker/u8:1	21:57:25	1
1471032	2	63	0,3	sleep1	0	-21	swapper/1	22:51:57	1
1344849	99	58	3,8	cyclictest	1525201	-21	apt-get	00:05:19	1
1344849	99	54	2,7	cyclictest	1377014	-21	apt-get	20:30:13	1
1344849	99	54	2,6	cyclictest	1357361	-21	apt-get	19:40:12	1
1344844	99	54	2,7	cyclictest	1385285	-21	apt-get	20:50:11	0
1344844	99	54	2,6	cyclictest	1449864	-21	apt-get	22:25:13	0
1344844	99	54	2,5	cyclictest	1465119	-21	apt-get	22:45:12	0
1344849	99	53	9,6	cyclictest	1457731	-21	perl	22:35:15	1
1344849	99	53	2,7	cyclictest	1371106	-21	apt-get	20:15:13	1
1344849	99	53	1,6	cyclictest	1359321	-21	apt-get	19:45:12	1
1344844	99	53	2,7	cyclictest	1438746	-21	apt-get	22:10:12	0
1344844	99	53	2,7	cyclictest	1438746	-21	apt-get	22:10:11	0
1344849	99	52	1,9	cyclictest	1502472	-21	apt-get	23:35:12	1
1365	99	51	0,3	rtkit-daemon	0	-21	swapper/0	20:19:33	0
1344844	99	51	1,8	cyclictest	1404825	-21	apt-get	21:25:12	0
1344844	99	51	1,7	cyclictest	1434951	-21	apt-get	22:05:14	0
1344844	99	51	1,6	cyclictest	1543504	-21	apt-get	00:30:15	0
1344849	99	50	2,7	cyclictest	1431281	-21	apt-get	22:00:17	1
1344849	99	50	1,5	cyclictest	1419935	-21	apt-get	21:45:14	1
1344844	99	50	2,7	cyclictest	1547167	-21	apt-get	00:35:13	0
1344844	99	48	2,5	cyclictest	1531733	-21	apt-get	00:15:15	0
1344844	99	48	2,5	cyclictest	1446107	-21	apt-get	22:20:14	0
1344844	99	48	1,6	cyclictest	1347514	-21	apt-get	19:15:15	0
1344844	99	47	2,6	cyclictest	1423713	-21	apt-get	21:50:14	0
1344849	99	46	9,4	cyclictest	0	-21	swapper/1	23:17:51	1
1344849	99	46	3,10	cyclictest	1383327	-21	apt-get	20:45:14	1
1344849	99	46	2,5	cyclictest	1353416	-21	apt-get	19:30:12	1
1344844	99	46	2,7	cyclictest	1397208	-21	apt-get	21:15:14	0
1365	99	44	0,3	rtkit-daemon	0	-21	swapper/1	00:21:59	1
1344849	99	44	3,6	cyclictest	1460951	-21	apt-get	22:40:12	1
1344849	99	44	2,8	cyclictest	1531733	-21	apt-get	00:15:13	1
1344844	99	44	2,5	cyclictest	1491269	-21	apt-get	23:20:13	0
1502114	2	43	0,4	sleep1	0	-21	swapper/1	23:34:49	1
1344849	99	43	2,7	cyclictest	1373091	-21	apt-get	20:20:12	1
1344844	99	43	3,9	cyclictest	1535612	-21	apt-get	00:20:12	0
1344849	99	42	1,7	cyclictest	1521315	-21	apt-get	00:00:15	1
1344844	99	42	12,25	cyclictest	1467776	-1	kworker/u9:1	23:45:12	0
1365	99	41	0,3	rtkit-daemon	0	-21	swapper/1	22:15:00	1
1365	99	41	0,3	rtkit-daemon	0	-21	swapper/1	22:14:59	1
1344849	99	41	4,8	cyclictest	1412440	-21	apt-get	21:35:12	1
1344849	99	41	2,7	cyclictest	1393260	-21	apt-get	21:10:16	1
1344849	99	41	1,8	cyclictest	1401131	-21	apt-get	21:20:12	1
1344849	99	40	9,5	cyclictest	1548383	-21	cat	00:35:26	1
1344849	99	40	3,9	cyclictest	1387252	-21	apt-get	20:55:16	1
1344849	99	40	3,7	cyclictest	1517436	-21	apt-get	23:55:13	1
1344849	99	40	2,8	cyclictest	1355381	-21	apt-get	19:35:14	1
1344849	99	40	2,8	cyclictest	1349494	-21	apt-get	19:20:14	1
1344849	99	40	2,8	cyclictest	1349494	-21	apt-get	19:20:14	1
1344849	99	40	2,7	cyclictest	1381367	-21	apt-get	20:40:13	1
1344849	99	40	2,6	cyclictest	1472636	-21	apt-get	22:55:12	1
1344849	99	40	2,6	cyclictest	1453583	-21	apt-get	22:30:13	1
1344849	99	40	2,14	cyclictest	1513800	-21	apt-get	23:50:15	1
1344849	99	40	1,7	cyclictest	1369150	-21	apt-get	20:10:18	1
1344849	99	40	0,3	cyclictest	1397552	-21	fschecks_time	21:15:19	1
1344849	99	39	2,8	cyclictest	1539498	-21	apt-get	00:25:17	1
1344849	99	39	2,8	cyclictest	1361282	-21	apt-get	19:50:15	1
1344849	99	39	2,7	cyclictest	1495032	-21	apt-get	23:25:10	1
1344849	99	39	2,7	cyclictest	1389231	-21	apt-get	21:00:13	1
1344849	99	39	2,11	cyclictest	1449864	-21	apt-get	22:25:14	1
1344849	99	39	14,3	cyclictest	1466597	-21	chrt	22:45:37	1
1344849	99	38	11,6	cyclictest	1528371	-21	ls	00:10:14	1
1344849	99	38	10,5	cyclictest	1368759	-21	seq	20:08:11	1
1344849	99	37	8,9	cyclictest	1407988	-21	ssh	21:29:26	1
1344849	99	37	2,8	cyclictest	1416331	-21	apt-get	21:40:15	1
1344849	99	37	2,7	cyclictest	1344968	-21	apt-get	19:10:12	1
1344849	99	37	2,6	cyclictest	1480118	-21	apt-get	23:05:13	1
1344849	99	37	2,5	cyclictest	1506297	-21	apt-get	23:40:12	1
1344849	99	37	11,3	cyclictest	1447134	-21	sendmail_mailtr	22:20:23	1
1344849	99	37	0,9	cyclictest	1494669	-21	ssh	23:24:48	1
1344849	99	37	0,16	cyclictest	1511683	-21	ssh	23:45:57	1
1344844	99	37	13,7	cyclictest	1507120	-21	ntp_states	23:40:22	0
1344849	99	36	8,7	cyclictest	1348242	-21	ntp_kernel_err	19:15:22	1
1344849	99	36	2,6	cyclictest	1391188	-21	apt-get	21:05:13	1
1344849	99	36	12,3	cyclictest	1477716	-21	sh	23:00:31	1
1344849	99	35	8,7	cyclictest	281	-20	systemd-journal	00:34:59	1
1344849	99	35	3,7	cyclictest	1378977	-21	apt-get	20:35:14	1
1344849	99	35	2,7	cyclictest	1483913	-21	apt-get	23:10:13	1
1344849	99	35	2,6	cyclictest	1351454	-21	apt-get	19:25:12	1
1344849	99	35	2,5	cyclictest	1442507	-21	apt-get	22:15:12	1
1344844	99	35	2,9	cyclictest	1457385	-21	apt-get	22:35:13	0
1344849	99	34	2,5	cyclictest	1363245	-21	apt-get	19:55:13	1
1344844	99	34	4,9	cyclictest	1408591	-21	apt-get	21:30:17	0
1344844	99	34	1,11	cyclictest	1389443	-21	diskstats	21:00:16	0
1344849	99	33	2,6	cyclictest	1375052	-21	apt-get	20:25:12	1
1344849	99	33	11,2	cyclictest	1438155	-21	sh	22:09:21	1
1344849	99	33	0,7	cyclictest	1412095	-21	rm	21:34:50	1
1344844	99	33	11,3	cyclictest	1470689	-21	sh	22:51:15	0
1344844	99	32	8,7	cyclictest	1376923	-21	date	20:30:00	0
1344844	99	32	1,6	cyclictest	1365235	-21	apt-get	20:00:20	0
1344844	99	32	12,2	cyclictest	1505113	-21	sh	23:38:10	0
1344844	99	32	10,5	cyclictest	1352232	-21	awk	19:25:21	0
1344844	99	31	12,3	cyclictest	1541811	-21	sh	00:27:40	0
1344844	99	31	11,3	cyclictest	1444441	-21	sh	22:16:40	0
1344844	99	30	11,3	cyclictest	1514833	-21	sendmail_mailtr	23:50:23	0
1344844	99	30	11,3	cyclictest	1392050	-21	proc_pri	21:05:21	0
1344844	99	29	11,2	cyclictest	1392949	-21	diskmemload	00:00:27	0
1344844	99	28	2,6	cyclictest	1350258	-21	ntp_states	19:20:21	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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