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 Thu Feb 19, 2026 00:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1335878	99	102	94,6	cyclictest	1445822	-21	kworker/u4:6+events_unbound	22:46:07	1
1335878	99	102	94,6	cyclictest	1445822	-21	kworker/u4:6+events_unbound	22:46:07	1
1335878	99	100	79,10	cyclictest	1337091	-21	kworker/u4:11-xprtiod	19:35:12	1
1335878	99	81	71,5	cyclictest	1482668	-21	ssh	23:25:29	1
1335877	99	79	69,8	cyclictest	1343487	-21	kworker/u4:1+events_unbound	19:40:26	0
1335878	99	77	66,8	cyclictest	1343490	-21	kworker/u4:6+events_unbound	20:20:38	1
1335877	99	76	66,7	cyclictest	1357551	-21	kworker/u4:5+events_unbound	20:55:43	0
1335877	99	75	68,5	cyclictest	1337091	-21	kworker/u4:11+events_unbound	19:35:26	0
1335878	99	67	39,24	cyclictest	0	-21	swapper/1	19:20:21	1
1335878	99	67	30,34	cyclictest	0	-21	swapper/1	23:05:32	1
1335878	99	67	30,34	cyclictest	0	-21	swapper/1	21:10:38	1
1335878	99	67	30,33	cyclictest	0	-21	swapper/1	21:25:33	1
1335877	99	67	57,7	cyclictest	1477847	-21	aten_r7power_vo	23:20:17	0
1335878	99	66	35,29	cyclictest	1409985	-21	df_abs	22:00:17	1
1335878	99	66	35,28	cyclictest	1335874	-21	cyclictest	22:30:24	1
1335878	99	65	33,30	cyclictest	0	-21	swapper/1	22:37:45	1
1335878	99	65	29,34	cyclictest	1487161	-21	ssh	23:30:35	1
1335878	99	65	29,34	cyclictest	1487161	-21	ssh	23:30:35	1
1335878	99	65	29,34	cyclictest	0	-21	swapper/1	00:10:26	1
1335878	99	65	29,33	cyclictest	0	-21	swapper/1	22:15:01	1
1335878	99	65	28,7	cyclictest	1366382	-21	kworker/u4:4+rpciod	21:15:34	1
1335878	99	65	28,34	cyclictest	0	-21	swapper/1	23:00:18	1
1335878	99	65	27,36	cyclictest	1529200	-21	interrupts	00:20:26	1
1335878	99	65	22,9	cyclictest	54	-21	kswapd0	23:20:18	1
1335878	99	64	34,27	cyclictest	1492646	-21	kworker/u4:0+rpciod	23:40:38	1
1335878	99	64	34,27	cyclictest	1492646	-21	kworker/u4:0+rpciod	23:40:38	1
1335878	99	64	33,28	cyclictest	0	-21	swapper/1	00:05:21	1
1335878	99	64	3,23	cyclictest	1524886	-21	irqstats	00:15:21	1
1335878	99	64	3,23	cyclictest	1524886	-21	irqstats	00:15:21	1
1335878	99	64	31,30	cyclictest	1424204	-21	kworker/u4:6+rpciod	22:20:16	1
1335878	99	64	30,31	cyclictest	0	-21	swapper/1	23:35:15	1
1335878	99	64	29,32	cyclictest	0	-21	swapper/1	23:10:28	1
1335878	99	64	26,35	cyclictest	0	-21	swapper/1	20:45:01	1
1335877	99	64	53,8	cyclictest	1458772	-21	kworker/u4:9+events_unbound	23:06:12	0
1335877	99	64	51,9	cyclictest	15	1	ktimers/0	22:05:35	0
1335877	99	64	51,9	cyclictest	15	1	ktimers/0	22:05:35	0
1335878	99	63	31,30	cyclictest	1366553	-21	latency_hist	21:10:02	1
1335878	99	63	24,9	cyclictest	0	-21	swapper/1	19:50:15	1
1335878	99	63	23,10	cyclictest	0	-21	swapper/1	19:55:41	1
1335877	99	63	54,6	cyclictest	1511790	-21	aten_r7power_vo	00:00:16	0
1335877	99	63	48,12	cyclictest	1535010	-21	kworker/u4:3+events_unbound	00:33:42	0
1335878	99	62	35,25	cyclictest	1434816	-21	latency_hist	22:30:01	1
1335878	99	62	32,27	cyclictest	0	-21	swapper/1	22:40:29	1
1335878	99	62	31,28	cyclictest	1450162	-21	kworker/u4:4-rpciod	22:55:02	1
1335878	99	62	31,28	cyclictest	0	-21	swapper/1	22:05:41	1
1335878	99	62	31,28	cyclictest	0	-21	swapper/1	22:05:40	1
1335878	99	62	29,30	cyclictest	0	-21	swapper/1	00:25:23	1
1335878	99	62	27,32	cyclictest	0	-21	swapper/1	21:55:18	1
1335878	99	62	26,4	cyclictest	0	-21	swapper/1	22:15:21	1
1335878	99	62	25,34	cyclictest	0	-21	swapper/1	21:50:15	1
1335877	99	62	53,7	cyclictest	1450164	-21	kworker/u4:8+events_unbound	22:51:06	0
1335877	99	62	53,7	cyclictest	1394677	-21	kworker/u4:5+events_unbound	21:45:55	0
1335877	99	62	48,8	cyclictest	0	-21	swapper/0	22:25:28	0
1335878	99	61	31,28	cyclictest	1537284	-21	cut	00:30:18	1
1335878	99	61	28,31	cyclictest	0	-21	swapper/1	00:35:27	1
1335878	99	61	27,31	cyclictest	0	-21	swapper/1	23:50:27	1
1335878	99	61	27,31	cyclictest	0	-21	swapper/1	22:55:34	1
1335878	99	61	25,4	cyclictest	0	-21	swapper/1	21:40:33	1
1335877	99	61	53,6	cyclictest	1347284	-21	kworker/u4:17+events_unbound	20:30:40	0
1335877	99	61	51,8	cyclictest	54	-21	kswapd0	00:20:10	0
1335878	99	60	31,26	cyclictest	0	-21	swapper/1	20:00:21	1
1335878	99	60	25,6	cyclictest	0	-21	swapper/1	23:15:21	1
1335878	99	60	22,8	cyclictest	1496958	-21	kworker/u4:5+rpciod	00:00:29	1
1335877	99	60	52,6	cyclictest	1348622	-21	kworker/u4:18+events_unbound	20:50:42	0
1335878	99	59	51,6	cyclictest	1377740	-21	kworker/u4:3+events_unbound	21:30:50	1
1335878	99	59	33,23	cyclictest	1344773	-21	kworker/u4:10+rpciod	20:10:19	1
1335878	99	59	22,5	cyclictest	0	-21	swapper/1	20:35:26	1
1335877	99	59	50,7	cyclictest	314	-21	systemd-journal	22:31:04	0
1335877	99	59	46,10	cyclictest	1333397	-21	kworker/u4:0+events_unbound	21:40:01	0
1335878	99	58	27,28	cyclictest	0	-21	swapper/1	19:15:35	1
1335878	99	58	24,32	cyclictest	0	-21	swapper/1	21:45:28	1
1335878	99	58	21,6	cyclictest	1357548	-21	kworker/u4:1+rpciod	20:45:22	1
1335877	99	58	49,6	cyclictest	1394675	-21	kworker/u4:1+events_unbound	21:50:57	0
1335877	99	58	48,7	cyclictest	1418688	-21	/usr/sbin/munin	22:10:20	0
1335878	99	57	28,26	cyclictest	0	-21	swapper/1	23:55:13	1
1335878	99	57	28,26	cyclictest	0	-21	swapper/1	21:20:29	1
1335878	99	57	27,27	cyclictest	0	-21	swapper/1	23:45:35	1
1335878	99	57	26,4	cyclictest	0	-21	swapper/1	19:40:33	1
1335878	99	57	22,6	cyclictest	1365137	-21	cron	21:05:00	1
1335878	99	57	2,20	cyclictest	1337122	-21	munin-run	19:15:00	1
1335878	99	57	19,8	cyclictest	1351292	-21	sed	20:10:00	1
1335877	99	57	52,3	cyclictest	1344775	-21	kworker/u4:15+events_unbound	19:45:26	0
1335877	99	57	50,5	cyclictest	1441496	-21	kworker/u4:1-rpciod	22:37:59	0
1335878	99	56	27,26	cyclictest	0	-21	swapper/1	20:30:20	1
1335878	99	56	22,5	cyclictest	0	-21	swapper/1	20:55:01	1
1335878	99	56	16,9	cyclictest	0	-21	swapper/1	19:25:36	1
1335877	99	56	48,6	cyclictest	1445822	-21	kworker/u4:6+events_unbound	22:56:09	0
1335877	99	56	46,6	cyclictest	0	-21	swapper/0	23:43:20	0
1335877	99	56	46,6	cyclictest	0	-21	swapper/0	23:43:19	0
1335877	99	56	27,20	cyclictest	1338371	-21	modprobe	19:20:01	0
1335878	99	55	25,4	cyclictest	0	-21	swapper/1	19:30:15	1
1335878	99	55	24,5	cyclictest	0	-21	swapper/1	20:20:01	1
1335878	99	55	23,6	cyclictest	0	-21	swapper/1	21:35:34	1
1335877	99	55	45,7	cyclictest	1520397	-21	/usr/sbin/munin	00:10:20	0
1335877	99	55	45,7	cyclictest	1411981	-21	kworker/u4:10-rpciod	22:20:21	0
1335877	99	55	33,16	cyclictest	255	50	irq/23-42890000.ethernet	00:35:35	0
1335877	99	55	2,44	cyclictest	1444379	-21	ssh	22:40:29	0
1335878	99	54	22,7	cyclictest	0	-21	swapper/1	21:00:02	1
1335877	99	54	44,8	cyclictest	1343490	-21	kworker/u4:6-rpciod	20:45:38	0
1335877	99	54	43,8	cyclictest	1501060	-21	systemd	23:47:04	0
1335878	99	53	44,6	cyclictest	1340893	-21	kworker/u4:13+events_unbound	20:25:38	1
1335877	99	53	45,6	cyclictest	1349854	-21	grep	20:00:35	0
1335877	99	53	45,6	cyclictest	1343490	-21	kworker/u4:6+events_unbound	21:05:46	0
1335877	99	53	44,6	cyclictest	1488337	-21	kworker/u4:4+events_unbound	23:39:44	0
1335877	99	53	43,6	cyclictest	1335874	-21	cyclictest	23:52:11	0
1335877	99	53	41,9	cyclictest	1526426	-21	ssh	00:16:59	0
1335877	99	53	41,9	cyclictest	1526426	-21	ssh	00:16:58	0
1335877	99	52	44,6	cyclictest	1511361	-21	grep	00:00:01	0
1335877	99	51	41,8	cyclictest	1351038	-21	unixbench-2d	20:05:37	0
1335877	99	51	40,8	cyclictest	1422381	-21	ssh	22:15:12	0
1335877	99	50	42,6	cyclictest	1410972	-21	sed	22:00:37	0
1335877	99	50	41,7	cyclictest	1377740	-21	kworker/u4:3+events_unbound	21:23:00	0
1335877	99	50	41,6	cyclictest	1344774	-21	kworker/u4:14+events_unbound	20:15:01	0
1335877	99	50	31,11	cyclictest	1365149	-21	modprobe	21:05:01	0
1335877	99	49	42,5	cyclictest	1482682	-21	ntp_kernel_pll_	23:25:28	0
1335877	99	49	41,5	cyclictest	1347284	-21	kworker/u4:17-rpciod	20:25:38	0
1335877	99	49	40,7	cyclictest	1533516	-21	diskmemload	00:25:30	0
1335877	99	49	38,7	cyclictest	1461010	-21	fschecks_count	23:00:19	0
1335877	99	49	35,11	cyclictest	54	-21	kswapd0	23:10:17	0
1335877	99	49	31,16	cyclictest	1384293	-21	df_abs	21:30:18	0
1335877	99	48	41,5	cyclictest	1513550	-21	kworker/u4:3+events_unbound	00:10:00	0
1335877	99	48	39,7	cyclictest	54	-21	kswapd0	21:40:18	0
1335877	99	48	39,6	cyclictest	1347300	-21	modprobe	19:55:01	0
1335877	99	48	36,7	cyclictest	1380506	-21	sh	21:25:31	0
1335877	99	48	2,20	cyclictest	1347311	-21	apt-get	19:55:08	0
1335877	99	47	38,6	cyclictest	1367862	-21	timerwakeupswit	21:10:37	0
1335877	99	47	36,9	cyclictest	1375241	-21	latency_hist	21:20:02	0
1335877	99	47	36,9	cyclictest	1358141	-21	gltestperf	20:35:19	0
1335877	99	47	35,9	cyclictest	1354016	-21	aten_r7power_cu	20:20:19	0
1335877	99	47	35,8	cyclictest	1484076	-21	kworker/u4:0-rpciod	23:30:27	0
1335877	99	47	35,8	cyclictest	1484076	-21	kworker/u4:0-rpciod	23:30:26	0
1335877	99	47	35,10	cyclictest	1405868	-21	fschecks_time	21:55:19	0
1335877	99	47	27,5	cyclictest	0	-21	swapper/0	23:16:47	0
1335877	99	43	35,6	cyclictest	1338868	-21	fschecks_time	19:20:19	0
1335877	99	43	34,7	cyclictest	1352893	-21	fschecks_count	20:15:19	0
1335877	99	42	35,5	cyclictest	1448141	-21	sed	22:45:19	0
1335877	99	42	35,5	cyclictest	1448141	-21	sed	22:45:18	0
1335877	99	42	35,5	cyclictest	1064	-21	lldpd	19:26:36	0
1335877	99	41	5,23	cyclictest	1335875	-21	awk	19:10:01	0
1335877	99	41	5,23	cyclictest	1335875	-21	awk	19:10:00	0
1335877	99	41	30,7	cyclictest	0	-21	swapper/0	19:10:31	0
1335877	99	40	33,5	cyclictest	1341117	-21	tr	19:30:14	0
1335877	99	40	27,9	cyclictest	1360075	-21	systemd	20:40:40	0
1335878	99	39	31,6	cyclictest	1346130	-21	latency_hist	19:50:01	1
1335878	99	34	24,7	cyclictest	0	-21	swapper/1	19:10:02	1
1335878	99	34	24,7	cyclictest	0	-21	swapper/1	19:10:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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