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 792 highest latencies:

System rack7slot2.osadl.org (updated Sun Jul 12, 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
1360522	99	115	91,7	cyclictest	1499924	-21	kworker/u4:6+events_unbound	23:58:04	0
1360522	99	114	92,6	cyclictest	1394285	-21	kworker/u4:7+events_unbound	21:32:47	0
1360523	99	104	96,6	cyclictest	1569867	-21	kworker/u4:10+events_unbound	00:33:06	1
1360522	99	104	94,8	cyclictest	1411726	-21	kworker/u4:0+events_unbound	21:57:51	0
1360522	99	97	89,6	cyclictest	1543813	-21	kworker/u4:4+events_unbound	00:28:06	0
1360522	99	96	88,6	cyclictest	1495443	-21	kworker/u4:3+events_unbound	23:13:00	0
1360522	99	95	83,7	cyclictest	1504394	-21	kworker/u4:1+events_unbound	23:33:00	0
1360522	99	86	77,7	cyclictest	1451398	-21	kworker/u4:5+events_unbound	22:17:52	0
1360522	99	85	65,17	cyclictest	53	-21	kswapd0	00:35:12	0
1360522	99	84	77,5	cyclictest	1416201	-21	kworker/u4:1+events_unbound	21:37:48	0
1360522	99	83	75,6	cyclictest	1499928	-21	kworker/u4:11+events_unbound	23:38:01	0
1360522	99	81	63,6	cyclictest	1407247	-21	kworker/u4:15+events_unbound	21:52:50	0
1360522	99	78	73,4	cyclictest	1378444	-21	kworker/u4:10+events_unbound	20:57:44	0
1360522	99	75	67,6	cyclictest	1521579	-21	kworker/u4:7+events_unbound	00:03:05	0
1360522	99	75	55,9	cyclictest	1125773	-21	kworker/u4:5+events_unbound	19:35:01	0
1360522	99	75	55,9	cyclictest	1125773	-21	kworker/u4:5+events_unbound	19:35:01	0
1360523	99	74	37,35	cyclictest	1360520	-21	cyclictest	23:50:22	1
1360522	99	74	68,4	cyclictest	1383566	-21	kworker/u4:4+events_unbound	21:02:45	0
1360522	99	71	64,5	cyclictest	1437996	-21	kworker/u4:16+events_unbound	22:02:50	0
1360523	99	70	34,33	cyclictest	0	-21	swapper/1	21:45:28	1
1360522	99	69	55,5	cyclictest	1127439	-21	kworker/u4:6+events_unbound	19:45:02	0
1360522	99	69	52,11	cyclictest	53	-21	kswapd0	22:50:12	0
1360522	99	68	2,55	cyclictest	1476244	-21	ssh	22:45:26	0
1360523	99	67	39,26	cyclictest	1471940	-21	ld	22:40:29	1
1360523	99	67	35,30	cyclictest	1512093	-21	grep	23:25:42	1
1360523	99	67	31,32	cyclictest	0	-21	swapper/1	20:30:01	1
1360522	99	67	58,7	cyclictest	1378442	-21	kworker/u4:3+events_unbound	21:22:47	0
1360523	99	66	61,3	cyclictest	1398196	-21	kworker/u4:10+events_unbound	21:17:46	1
1360523	99	66	40,23	cyclictest	0	-21	swapper/1	00:15:12	1
1360523	99	66	33,30	cyclictest	0	-21	swapper/1	22:15:01	1
1360523	99	66	31,32	cyclictest	0	-21	swapper/1	23:15:39	1
1360523	99	66	28,35	cyclictest	0	-21	swapper/1	22:45:22	1
1360522	99	66	51,11	cyclictest	1471224	-21	aten2__	22:40:16	0
1360523	99	65	35,27	cyclictest	1363494	-21	fschecks_count	19:20:20	1
1360523	99	65	29,33	cyclictest	0	-21	swapper/1	00:10:34	1
1360523	99	65	26,36	cyclictest	0	-21	swapper/1	22:55:37	1
1360523	99	64	28,33	cyclictest	0	-21	swapper/1	00:00:15	1
1360523	99	63	5,18	cyclictest	1498276	-21	ssh	23:10:27	1
1360523	99	63	32,28	cyclictest	0	-21	swapper/1	23:05:32	1
1360523	99	63	31,29	cyclictest	1466454	-21	ssh	22:35:00	1
1360523	99	63	30,30	cyclictest	0	-21	swapper/1	23:55:49	1
1360523	99	63	29,32	cyclictest	1383286	-21	mailstats	20:35:37	1
1360523	99	63	29,31	cyclictest	0	-21	swapper/1	23:20:31	1
1360523	99	63	25,4	cyclictest	0	-21	swapper/1	22:25:37	1
1360523	99	62	53,6	cyclictest	1382300	-21	kworker/u4:2+events_unbound	21:07:48	1
1360523	99	62	4,20	cyclictest	1515785	-21	ssh	23:30:23	1
1360523	99	62	37,22	cyclictest	1291117	-21	kworker/u4:13-xprtiod	20:00:32	1
1360523	99	62	32,27	cyclictest	1362980	-21	unixbench_singl	19:15:42	1
1360523	99	62	28,31	cyclictest	0	-21	swapper/1	19:55:29	1
1360523	99	62	26,34	cyclictest	1547015	-21	/usr/sbin/munin	00:05:39	1
1360523	99	62	21,3	cyclictest	0	-21	swapper/1	23:35:12	1
1360522	99	62	55,5	cyclictest	1394286	-21	kworker/u4:9+events_unbound	21:12:46	0
1360523	99	61	42,12	cyclictest	53	-21	kswapd0	00:35:10	1
1360523	99	61	26,31	cyclictest	0	-21	swapper/1	21:55:01	1
1360523	99	61	25,33	cyclictest	1489144	-21	fschecks_count	23:00:19	1
1360523	99	61	25,33	cyclictest	0	-21	swapper/1	21:35:33	1
1360523	99	61	21,6	cyclictest	0	-21	swapper/1	23:50:01	1
1360523	99	61	15,10	cyclictest	1073	-21	snmpd	22:24:19	1
1360522	99	61	55,4	cyclictest	1346965	-21	kworker/u4:1+events_unbound	19:37:38	0
1360522	99	61	54,5	cyclictest	1127439	-21	kworker/u4:6+events_unbound	20:22:41	0
1360522	99	61	53,6	cyclictest	1346966	-21	kworker/u4:3+events_unbound	19:22:34	0
1360523	99	60	29,28	cyclictest	0	-21	swapper/1	20:55:38	1
1360523	99	60	28,29	cyclictest	0	-21	swapper/1	23:40:17	1
1360523	99	60	26,31	cyclictest	0	-21	swapper/1	21:40:16	1
1360523	99	60	23,4	cyclictest	0	-21	swapper/1	21:30:26	1
1360523	99	60	22,4	cyclictest	0	-21	swapper/1	21:25:46	1
1360523	99	59	25,31	cyclictest	0	-21	swapper/1	20:30:16	1
1360523	99	59	23,33	cyclictest	0	-21	swapper/1	00:20:16	1
1360523	99	59	21,35	cyclictest	0	-21	swapper/1	19:45:25	1
1360522	99	59	52,5	cyclictest	998644	-21	kworker/u4:2+events_unbound	19:17:34	0
1360523	99	58	24,4	cyclictest	0	-21	swapper/1	21:10:20	1
1360523	99	58	24,31	cyclictest	0	-21	swapper/1	22:35:39	1
1360523	99	58	22,8	cyclictest	1480600	-21	netstat	22:50:24	1
1360522	99	58	51,5	cyclictest	1521579	-21	kworker/u4:7+events_unbound	23:48:01	0
1360522	99	58	51,5	cyclictest	1384865	-21	kworker/u4:17+events_unbound	20:47:43	0
1360523	99	57	24,29	cyclictest	0	-21	swapper/1	19:30:02	1
1360523	99	57	21,8	cyclictest	0	-21	swapper/1	20:40:37	1
1360523	99	57	18,6	cyclictest	0	-21	swapper/1	22:15:25	1
1360523	99	56	26,27	cyclictest	0	-21	swapper/1	00:25:34	1
1360523	99	56	24,28	cyclictest	0	-21	swapper/1	22:10:00	1
1360523	99	56	21,6	cyclictest	0	-21	swapper/1	20:50:12	1
1360523	99	56	21,5	cyclictest	0	-21	swapper/1	21:00:51	1
1360523	99	56	20,6	cyclictest	0	-21	swapper/1	21:20:19	1
1360522	99	56	48,6	cyclictest	1543813	-21	kworker/u4:4+events_unbound	00:15:02	0
1360522	99	56	42,4	cyclictest	1464150	-21	kworker/u4:7+events_unbound	22:31:46	0
1360523	99	55	24,4	cyclictest	0	-21	swapper/1	19:30:19	1
1360523	99	55	24,4	cyclictest	0	-21	swapper/1	19:30:19	1
1360523	99	55	21,7	cyclictest	0	-21	swapper/1	19:55:01	1
1360523	99	54	23,6	cyclictest	0	-21	swapper/1	19:40:21	1
1360522	99	54	47,5	cyclictest	1394286	-21	kworker/u4:9+events_unbound	21:25:21	0
1360522	99	54	46,6	cyclictest	1291117	-21	kworker/u4:13+events_unbound	19:12:33	0
1360522	99	53	46,5	cyclictest	1360520	-21	cyclictest	23:27:59	0
1360523	99	52	20,6	cyclictest	0	-21	swapper/1	21:55:35	1
1360523	99	52	17,7	cyclictest	0	-21	swapper/1	19:15:01	1
1360522	99	52	45,5	cyclictest	1378445	-21	kworker/u4:13+events_unbound	20:32:41	0
1360523	99	51	42,7	cyclictest	1378461	-21	systemd	20:17:40	1
1360523	99	51	24,3	cyclictest	0	-21	swapper/1	20:20:30	1
1360523	99	51	22,4	cyclictest	0	-21	swapper/1	20:10:36	1
1360523	99	51	20,6	cyclictest	1434126	-21	kworker/u4:12+rpciod	22:00:32	1
1360522	99	51	44,5	cyclictest	1569863	-21	kworker/u4:6+events_unbound	00:35:01	0
1360522	99	51	27,14	cyclictest	1499928	-21	kworker/u4:11+events_unbound	23:41:45	0
1360522	99	50	43,5	cyclictest	1543813	-21	kworker/u4:4+events_unbound	00:05:37	0
1360522	99	50	43,5	cyclictest	1502641	-21	/usr/sbin/munin	23:15:26	0
1360522	99	50	43,5	cyclictest	1371971	-21	kworker/u4:4+events_unbound	19:52:37	0
1360522	99	50	41,7	cyclictest	1533761	-21	/usr/sbin/munin	23:50:39	0
1360522	99	50	38,5	cyclictest	1437996	-21	kworker/u4:16+events_unbound	22:07:45	0
1360522	99	50	32,16	cyclictest	1453926	-21	fschecks_count	22:20:19	0
1360522	99	49	43,4	cyclictest	1499924	-21	kworker/u4:6+events_unbound	00:25:01	0
1360522	99	49	41,6	cyclictest	1371971	-21	kworker/u4:4+events_unbound	20:07:39	0
1360522	99	49	30,17	cyclictest	0	-21	swapper/0	21:05:40	0
1360522	99	48	41,6	cyclictest	1420068	-21	kworker/u4:8+events_unbound	22:11:46	0
1360522	99	48	31,12	cyclictest	1553888	-21	rm	00:14:26	0
1360523	99	47	38,6	cyclictest	1385809	-21	sendmail_mailqu	20:45:36	1
1360522	99	47	40,5	cyclictest	1507121	-21	ntp_kernel_pll_	23:20:28	0
1360522	99	47	40,5	cyclictest	1484899	-21	gltestperf	22:55:22	0
1360522	99	47	39,6	cyclictest	1486513	-21	kworker/u4:9+events_unbound	23:05:15	0
1360522	99	47	37,8	cyclictest	1407247	-21	kworker/u4:15+events_unbound	21:47:50	0
1360522	99	46	25,15	cyclictest	256	50	irq/23-42890000.ethernet	21:40:37	0
1360522	99	45	39,4	cyclictest	1458172	-21	aten_r7power_vo	22:25:18	0
1360522	99	45	38,5	cyclictest	974845	-21	kworker/u4:11+events_unbound	19:47:37	0
1360522	99	45	38,4	cyclictest	1394283	-21	kworker/u4:5-rpciod	21:20:02	0
1360522	99	45	35,8	cyclictest	1467080	-21	fschecks_count	22:35:19	0
1360522	99	44	37,5	cyclictest	1378443	-21	kworker/u4:9+events_unbound	20:37:42	0
1360522	99	44	36,6	cyclictest	1378444	-21	kworker/u4:10-rpciod	20:40:17	0
1360522	99	44	36,6	cyclictest	1364551	-21	aten2__	19:25:17	0
1360522	99	44	36,5	cyclictest	1374452	-21	cat	20:00:50	0
1360522	99	44	35,7	cyclictest	1488905	-21	aten_r7power_en	23:00:15	0
1360522	99	43	35,5	cyclictest	1377765	-21	gltestperf	20:15:19	0
1360522	99	42	21,19	cyclictest	0	-21	swapper/0	20:25:37	0
1360522	99	41	7,25	cyclictest	1360520	-21	cyclictest	19:10:01	0
1360522	99	41	32,7	cyclictest	1386632	-21	fschecks_time	20:50:20	0
1360523	99	40	32,6	cyclictest	1367494	-21	head	19:35:20	1
1360523	99	40	30,6	cyclictest	0	-21	swapper/1	20:10:01	1
1360522	99	39	29,6	cyclictest	0	-21	swapper/0	20:15:02	0
1360522	99	38	21,7	cyclictest	1371970	-21	kworker/u4:3+events_unbound	19:55:31	0
1360523	99	36	29,5	cyclictest	0	-21	swapper/1	19:10:03	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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