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 376 highest latencies:

System rack7slot2.osadl.org (updated Tue Mar 24, 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
1358948	99	112	104,6	cyclictest	1537447	-21	kworker/u4:9+events_unbound	00:18:36	1
1358947	99	110	98,10	cyclictest	53	-21	kswapd0	22:30:08	0
1358947	99	93	85,6	cyclictest	1388558	-21	kworker/u4:4+events_unbound	21:28:09	0
1358947	99	89	81,6	cyclictest	1445081	-21	kworker/u4:4+events_unbound	22:25:01	0
1358947	99	88	80,6	cyclictest	1418887	-21	kworker/u4:10+events_unbound	22:03:13	0
1358948	99	80	73,5	cyclictest	1418885	-21	kworker/u4:8+events_unbound	21:53:11	1
1358947	99	80	71,7	cyclictest	1387261	-21	kworker/u4:11+events_unbound	21:23:04	0
1358948	99	78	71,5	cyclictest	1371844	-21	kworker/u4:2+events_unbound	20:25:01	1
1358948	99	77	69,6	cyclictest	1510752	-21	kworker/u4:1+events_unbound	23:30:00	1
1358948	99	77	37,37	cyclictest	0	-21	swapper/1	21:00:26	1
1358947	99	77	68,7	cyclictest	1489118	-21	kworker/u4:4+events_unbound	23:03:23	0
1358948	99	76	66,7	cyclictest	1445077	-21	kworker/u4:0+events_unbound	22:20:02	1
1358947	99	76	67,7	cyclictest	1563479	-21	kworker/u4:16+events_unbound	00:28:37	0
1358948	99	75	40,33	cyclictest	1513791	-21	/usr/sbin/munin	23:30:21	1
1358948	99	75	35,4	cyclictest	0	-21	swapper/1	19:25:35	1
1358947	99	74	67,5	cyclictest	1489119	-21	kworker/u4:5+events_unbound	23:28:27	0
1358948	99	73	7,33	cyclictest	1389865	-21	diskmemload	21:55:30	1
1358948	99	73	66,5	cyclictest	1370574	-21	kworker/u4:14+events_unbound	21:18:06	1
1358948	99	73	37,33	cyclictest	0	-21	swapper/1	22:30:12	1
1358948	99	70	38,30	cyclictest	1358944	-21	cyclictest	23:20:32	1
1358948	99	70	34,5	cyclictest	0	-21	swapper/1	00:33:59	1
1358947	99	69	59,7	cyclictest	1528560	-21	kworker/u4:1+events_unbound	23:50:33	0
1358948	99	67	33,6	cyclictest	0	-21	swapper/1	23:10:34	1
1358947	99	67	60,5	cyclictest	1371844	-21	kworker/u4:2+events_unbound	20:10:01	0
1358948	99	66	57,7	cyclictest	1375680	-21	kworker/u4:5+events_unbound	20:58:03	1
1358947	99	66	57,6	cyclictest	1370575	-21	kworker/u4:17+events_unbound	19:55:00	0
1358948	99	65	56,7	cyclictest	1299452	-21	kworker/u4:2+events_unbound	19:48:01	1
1358948	99	65	56,6	cyclictest	1358903	-21	kworker/u4:3+events_unbound	19:12:57	1
1358947	99	65	58,5	cyclictest	1541914	-21	kworker/u4:2+events_unbound	00:03:32	0
1358947	99	65	57,6	cyclictest	1382069	-21	kworker/u4:19+events_unbound	20:50:01	0
1358947	99	64	57,5	cyclictest	1453412	-21	kworker/u4:6+events_unbound	22:53:21	0
1358947	99	64	51,8	cyclictest	53	-21	kswapd0	00:35:11	0
1358947	99	64	45,6	cyclictest	1453412	-21	kworker/u4:6+events_unbound	22:43:21	0
1358948	99	63	32,5	cyclictest	1361549	-21	wc	19:20:00	1
1358947	99	63	53,3	cyclictest	1375679	-21	kworker/u4:4+events_unbound	20:38:02	0
1358947	99	63	51,7	cyclictest	0	-21	swapper/0	21:30:36	0
1358947	99	62	52,7	cyclictest	1413463	-21	/usr/sbin/munin	21:35:40	0
1358947	99	61	54,5	cyclictest	1440625	-21	kworker/u4:16+events_unbound	22:08:15	0
1358947	99	61	51,7	cyclictest	1459209	-21	sshd	22:28:17	0
1358947	99	61	41,16	cyclictest	1493585	-21	kworker/u4:10-rpciod	23:24:58	0
1358948	99	60	51,7	cyclictest	1376962	-21	kworker/u4:8-rpciod	21:10:25	1
1358947	99	60	6,44	cyclictest	1395393	-21	ssh	21:15:32	0
1358948	99	59	50,6	cyclictest	1375680	-21	kworker/u4:5+events_unbound	21:10:00	1
1358947	99	59	52,5	cyclictest	1510752	-21	kworker/u4:1+events_unbound	23:40:22	0
1358947	99	59	52,5	cyclictest	1510752	-21	kworker/u4:1+events_unbound	23:40:21	0
1358947	99	59	49,7	cyclictest	1369292	-21	kworker/u4:15+events_unbound	19:58:00	0
1358947	99	59	46,11	cyclictest	1358944	-21	cyclictest	23:38:49	0
1358947	99	58	49,7	cyclictest	1541915	-21	kworker/u4:3+events_unbound	00:08:33	0
1358947	99	58	45,9	cyclictest	256	50	irq/23-42890000.ethernet	21:50:27	0
1358948	99	57	47,7	cyclictest	1388558	-21	kworker/u4:4+events_unbound	21:38:10	1
1358948	99	57	29,6	cyclictest	0	-21	swapper/1	22:15:20	1
1358948	99	56	46,7	cyclictest	0	-21	swapper/1	21:25:30	1
1358947	99	56	39,13	cyclictest	1469205	-21	latency_hist	22:40:01	0
1358948	99	55	46,7	cyclictest	1362152	-21	gltestperf	19:20:23	1
1358948	99	55	33,6	cyclictest	1559098	-21	kworker/u4:7+events_unbound	00:23:36	1
1358947	99	55	45,7	cyclictest	1566478	-21	diskmemload	00:30:24	0
1358947	99	54	47,5	cyclictest	1370568	-21	kworker/u4:3+events_unbound	20:03:01	0
1358947	99	54	47,5	cyclictest	1360171	-21	kworker/u4:9+events_unbound	19:38:00	0
1358947	99	54	47,4	cyclictest	0	-21	swapper/0	23:05:11	0
1358947	99	54	46,6	cyclictest	1370572	-21	kworker/u4:11+events_unbound	20:13:01	0
1358947	99	54	45,6	cyclictest	1528560	-21	kworker/u4:1+events_unbound	23:50:01	0
1358948	99	53	45,6	cyclictest	1522331	-21	/usr/sbin/munin	23:40:18	1
1358948	99	53	45,6	cyclictest	1522331	-21	/usr/sbin/munin	23:40:18	1
1358948	99	53	44,7	cyclictest	1462951	-21	kworker/u4:12-rpciod	22:35:38	1
1358948	99	53	43,6	cyclictest	1403121	-21	latency_hist	21:25:00	1
1358948	99	53	16,26	cyclictest	0	-21	swapper/1	22:40:27	1
1358947	99	53	44,6	cyclictest	1376946	-21	kworker/u4:6+events_unbound	20:30:01	0
1358947	99	53	42,8	cyclictest	1500745	-21	/usr/sbin/munin	23:15:23	0
1358947	99	53	34,11	cyclictest	0	-21	swapper/0	21:40:16	0
1358948	99	52	45,5	cyclictest	1521750	-21	sendmail	23:40:00	1
1358947	99	52	42,8	cyclictest	1528560	-21	kworker/u4:1+events_unbound	23:55:34	0
1358947	99	52	41,8	cyclictest	1552998	-21	/usr/sbin/munin	00:15:20	0
1358947	99	52	41,7	cyclictest	1385428	-21	/usr/sbin/munin	20:50:27	0
1358947	99	52	40,8	cyclictest	1448202	-21	diskmemload	22:15:31	0
1358947	99	52	37,10	cyclictest	0	-21	swapper/0	19:29:59	0
1358947	99	52	32,12	cyclictest	0	-21	swapper/0	21:50:00	0
1358947	99	52	30,19	cyclictest	1359421	-21	fschecks_time	19:10:16	0
1358947	99	51	43,6	cyclictest	1546363	-21	kworker/u4:7+events_unbound	00:11:59	0
1358947	99	51	43,6	cyclictest	1430887	-21	timerandwakeup	21:55:38	0
1358947	99	51	42,6	cyclictest	1368509	-21	fschecks_count	19:45:20	0
1358948	99	50	43,5	cyclictest	1486810	-21	latency_hist	23:00:02	1
1358947	99	50	42,6	cyclictest	1364107	-21	kworker/u4:14+events_unbound	19:32:59	0
1358947	99	50	40,7	cyclictest	1467409	-21	kworker/u4:2+events_unbound	22:55:10	0
1358947	99	50	35,11	cyclictest	0	-21	swapper/0	22:45:29	0
1358948	99	49	42,5	cyclictest	1456965	-21	sshd	22:25:27	1
1358947	99	49	38,8	cyclictest	1496907	-21	unixbench-2d	23:10:38	0
1358948	99	48	40,6	cyclictest	1527670	-21	unixbench_multi	23:45:40	1
1358948	99	48	38,7	cyclictest	1418883	-21	kworker/u4:0+rpciod	22:00:39	1
1358947	99	48	41,5	cyclictest	15	1	ktimers/0	22:11:45	0
1358947	99	48	40,6	cyclictest	1370574	-21	kworker/u4:14+events_unbound	20:18:01	0
1358947	99	48	36,8	cyclictest	0	-21	swapper/0	23:30:12	0
1358948	99	47	41,4	cyclictest	1479143	-21	sendmail_mailqu	22:50:37	1
1358948	99	47	39,6	cyclictest	1492004	-21	sshd	23:05:26	1
1358948	99	47	39,5	cyclictest	1574382	-21	apt-get	00:40:00	1
1358948	99	47	38,7	cyclictest	1364103	-21	kworker/u4:3+events_unbound	19:40:00	1
1358948	99	47	38,6	cyclictest	0	-21	swapper/1	22:08:13	1
1358948	99	47	35,8	cyclictest	0	-21	swapper/1	21:40:05	1
1358947	99	47	25,18	cyclictest	0	-21	swapper/0	19:40:33	0
1358948	99	46	40,4	cyclictest	1383403	-21	munin-plugin-st	20:45:00	1
1358948	99	46	39,5	cyclictest	1548558	-21	cpu	00:10:18	1
1358948	99	46	39,5	cyclictest	1500974	-21	ntp_states	23:15:35	1
1358948	99	46	39,5	cyclictest	1491185	-21	apt-key	23:05:01	1
1358948	99	46	39,5	cyclictest	1421813	-21	ssh	21:45:32	1
1358948	99	46	39,5	cyclictest	1382136	-21	sendmail	20:40:00	1
1358948	99	46	36,7	cyclictest	0	-21	swapper/1	20:13:00	1
1358948	99	46	35,9	cyclictest	1544296	-21	fschecks_count	00:05:21	1
1358947	99	46	40,4	cyclictest	1557315	-21	df_abs	00:20:17	0
1358947	99	46	39,5	cyclictest	1370567	-21	kworker/u4:1+events_unbound	20:28:04	0
1358947	99	46	34,7	cyclictest	0	-21	swapper/0	21:10:12	0
1358948	99	45	38,5	cyclictest	1535316	-21	aten_r7power_po	23:55:16	1
1358948	99	45	36,6	cyclictest	0	-21	swapper/1	00:00:34	1
1358947	99	45	36,7	cyclictest	1377322	-21	aten_r7power_vo	20:20:17	0
1358948	99	44	39,3	cyclictest	1364105	-21	kworker/u4:10+events_unbound	19:45:02	1
1358948	99	44	37,5	cyclictest	1531578	-21	ld	23:50:30	1
1358948	99	44	34,7	cyclictest	0	-21	swapper/1	21:30:28	1
1358947	99	44	37,5	cyclictest	1389883	-21	dpkg	21:10:00	0
1358947	99	44	35,7	cyclictest	1387584	-21	aten_r7power_po	21:00:17	0
1358947	99	44	35,6	cyclictest	1360611	-21	fschecks_count	19:15:19	0
1358947	99	43	36,5	cyclictest	1382699	-21	gltestperf	20:40:17	0
1358947	99	43	35,5	cyclictest	1386453	-21	fschecks_count	20:55:19	0
1358948	99	42	7,29	cyclictest	1384912	-21	awk	20:50:13	1
1358948	99	42	35,5	cyclictest	1473765	-21	acpi	22:45:14	1
1358948	99	42	34,5	cyclictest	1559098	-21	kworker/u4:7-xprtiod	00:25:06	1
1358948	99	42	34,5	cyclictest	1440624	-21	kworker/u4:15-rpciod	22:10:34	1
1358948	99	42	33,7	cyclictest	1372203	-21	aten_r7power_vo	20:00:17	1
1358948	99	41	34,5	cyclictest	1380133	-21	gltestperf	20:30:21	1
1358948	99	41	33,6	cyclictest	1365596	-21	apt-key	19:35:02	1
1358947	99	41	18,20	cyclictest	1362087	-21	fschecks_time	19:20:22	0
1358948	99	40	32,6	cyclictest	1378483	-21	aten2__	20:25:16	1
1358948	99	40	31,7	cyclictest	1376191	-21	fschecks_time	20:15:20	1
1358948	99	39	33,4	cyclictest	1374412	-21	systemd	20:08:00	1
1358948	99	38	31,5	cyclictest	1383366	-21	kworker/u4:20+rpciod	20:45:21	1
1358948	99	37	29,6	cyclictest	1371861	-21	cron	20:00:00	1
1358948	99	37	29,6	cyclictest	0	-21	swapper/1	19:50:19	1
1358947	99	33	24,6	cyclictest	1335307	-21	kworker/u4:8-rpciod	19:10:01	0
1358948	99	32	24,6	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