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 highest latencies:

System rack7slot2.osadl.org (updated Sat Jul 18, 2026 12:44:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2060000	99	103	93,7	cyclictest	2236946	-21	kworker/u4:6+events_unbound	11:56:13	0
2060001	99	97	87,7	cyclictest	2072802	-21	kworker/u4:1+events_unbound	08:20:14	1
2060001	99	95	88,5	cyclictest	2072806	-21	kworker/u4:3+events_unbound	08:50:26	1
2060000	99	91	84,5	cyclictest	2161135	-21	kworker/u4:10+events_unbound	10:35:47	0
2060000	99	77	35,37	cyclictest	2213875	-21	grep	11:25:40	0
2060000	99	75	3,16	cyclictest	2095685	-21	apt-get	09:15:12	0
2060001	99	74	62,9	cyclictest	2129755	-21	kworker/u4:10+events_unbound	10:05:44	1
2060001	99	73	62,8	cyclictest	2085677	-21	kworker/u4:7+events_unbound	09:10:33	1
2060001	99	73	62,8	cyclictest	2085677	-21	kworker/u4:7+events_unbound	09:10:33	1
2060000	99	73	38,31	cyclictest	2069306	-21	aten_r7power_po	07:45:17	0
2060000	99	72	39,31	cyclictest	2059998	-21	cyclictest	09:45:17	0
2060000	99	71	42,23	cyclictest	0	-21	swapper/0	07:20:10	0
2060000	99	71	19,14	cyclictest	2137013	-21	ssh	10:00:26	0
2060000	99	70	38,28	cyclictest	0	-21	swapper/0	09:30:39	0
2060001	99	69	60,6	cyclictest	2065158	-21	kworker/u4:13+events_unbound	08:05:01	1
2060000	99	69	19,35	cyclictest	0	-21	swapper/0	07:10:01	0
2060000	99	68	37,29	cyclictest	2226772	-21	/usr/sbin/munin	11:40:34	0
2060000	99	68	34,32	cyclictest	2101357	-21	xargs	09:20:39	0
2060000	99	68	33,31	cyclictest	0	-21	swapper/0	10:15:34	0
2060000	99	67	59,5	cyclictest	2241435	-21	kworker/u4:0+events_unbound	12:01:13	0
2060000	99	67	39,26	cyclictest	2117492	-21	sshd	09:39:19	0
2060000	99	67	38,27	cyclictest	2274292	-21	cron	12:35:00	0
2060000	99	67	37,27	cyclictest	2089286	-21	xargs	09:00:39	0
2060001	99	66	48,12	cyclictest	2090883	-21	modprobe	09:10:01	1
2060000	99	66	3,17	cyclictest	2105434	-21	ssh	09:25:26	0
2060000	99	66	30,33	cyclictest	0	-21	swapper/0	07:10:26	0
2060000	99	66	26,36	cyclictest	2190111	-21	latency_hist	11:00:02	0
2060000	99	66	24,37	cyclictest	2161135	-21	kworker/u4:10+rpciod	10:50:17	0
2060000	99	65	46,14	cyclictest	53	-21	kswapd0	08:40:19	0
2060000	99	65	35,28	cyclictest	2192473	-21	kworker/u4:12-nfsiod	11:20:00	0
2060000	99	65	35,26	cyclictest	2125161	-21	kworker/u4:2-rpciod	09:50:17	0
2060001	99	64	53,7	cyclictest	2190704	-21	sort	11:00:20	1
2060000	99	64	45,11	cyclictest	53	-21	kswapd0	11:10:08	0
2060000	99	64	31,30	cyclictest	2221355	-21	latency_hist	11:35:02	0
2060000	99	64	30,30	cyclictest	2253780	-21	unixbench_multi	12:10:43	0
2060000	99	63	55,6	cyclictest	2072806	-21	kworker/u4:3+events_unbound	08:45:24	0
2060000	99	63	30,29	cyclictest	0	-21	swapper/0	09:40:26	0
2060000	99	63	28,32	cyclictest	2080195	-21	cat	08:25:36	0
2060000	99	62	4,11	cyclictest	2062017	-21	ntpq	07:15:27	0
2060000	99	62	35,25	cyclictest	2159108	-21	df_abs	10:25:18	0
2060000	99	62	3,15	cyclictest	2086424	-21	ntpq	08:50:25	0
2060000	99	62	30,29	cyclictest	2083041	-21	kworker/u4:16	08:40:00	0
2060000	99	62	29,31	cyclictest	2231686	-21	sh	11:45:41	0
2060000	99	62	29,30	cyclictest	0	-21	swapper/0	10:45:38	0
2060001	99	61	50,7	cyclictest	2093719	-21	kworker/u4:5+events_unbound	09:25:40	1
2060000	99	61	32,26	cyclictest	2065192	-21	munin-plugin-st	07:30:00	0
2060000	99	61	30,28	cyclictest	0	-21	swapper/0	07:35:25	0
2060000	99	61	27,30	cyclictest	0	-21	swapper/0	10:10:29	0
2060000	99	61	27,29	cyclictest	0	-21	swapper/0	07:40:16	0
2060000	99	61	26,31	cyclictest	0	-21	swapper/0	12:05:40	0
2060000	99	61	14,6	cyclictest	2129756	-21	kworker/u4:11-rpciod	10:20:29	0
2060001	99	60	52,6	cyclictest	2116007	-21	kworker/u4:7+events_unbound	09:40:41	1
2060000	99	60	2,16	cyclictest	2077379	-21	ntpq	08:15:23	0
2060000	99	59	48,9	cyclictest	2065158	-21	kworker/u4:13+events_unbound	08:05:11	0
2060000	99	59	48,9	cyclictest	2065158	-21	kworker/u4:13+events_unbound	08:05:11	0
2060000	99	59	27,30	cyclictest	2078502	-21	gltestperf	08:20:19	0
2060000	99	59	27,28	cyclictest	0	-21	swapper/0	10:10:03	0
2060000	99	59	24,31	cyclictest	0	-21	swapper/0	09:10:30	0
2060000	99	59	24,31	cyclictest	0	-21	swapper/0	09:10:29	0
2060000	99	59	14,41	cyclictest	0	-21	swapper/0	11:35:38	0
2060000	99	59	1,15	cyclictest	2076124	-21	ntpq	08:10:27	0
2060000	99	59	1,15	cyclictest	2071030	-21	ntpq	07:50:26	0
2060000	99	58	4,10	cyclictest	2275482	-21	ssh	12:35:35	0
2060000	99	58	3,10	cyclictest	2173151	-21	ssh	10:40:32	0
2060000	99	58	25,31	cyclictest	2257024	-21	aten_r7power_en	12:15:17	0
2060000	99	58	2,16	cyclictest	2261233	-21	apt-config	12:20:02	0
2060000	99	58	2,15	cyclictest	2235624	-21	ntpq	11:50:33	0
2060000	99	58	2,10	cyclictest	2194575	-21	munin-plugin-st	11:05:00	0
2060001	99	57	50,5	cyclictest	2232433	-21	kworker/u4:1+events_unbound	11:51:09	1
2060001	99	57	48,6	cyclictest	2236947	-21	kworker/u4:8+events_unbound	12:11:15	1
2060000	99	57	27,26	cyclictest	0	-21	swapper/0	09:00:00	0
2060000	99	57	26,28	cyclictest	0	-21	swapper/0	07:55:21	0
2060000	99	57	25,30	cyclictest	256	50	irq/23-42890000.ethernet	07:30:27	0
2060000	99	57	25,30	cyclictest	2208367	-21	aten_r7power_po	11:20:16	0
2060001	99	56	38,14	cyclictest	0	-21	swapper/1	11:25:26	1
2060000	99	56	22,31	cyclictest	0	-21	swapper/0	11:05:18	0
2060000	99	56	1,14	cyclictest	2163928	-21	ssh	10:30:22	0
2060001	99	55	47,6	cyclictest	2058726	-21	kworker/u4:5+events_unbound	07:45:09	1
2060001	99	55	46,6	cyclictest	2147352	-21	kworker/u4:14+events_unbound	10:19:45	1
2060000	99	55	2,16	cyclictest	2073679	-21	ntpq	08:00:34	0
2060000	99	55	13,12	cyclictest	2080803	-21	aten_r7power_vo	08:30:18	0
2060000	99	54	19,32	cyclictest	0	-21	swapper/0	12:25:22	0
2060000	99	54	19,32	cyclictest	0	-21	swapper/0	09:55:33	0
2060000	99	54	19,32	cyclictest	0	-21	swapper/0	09:55:32	0
2060000	99	54	17,35	cyclictest	0	-21	swapper/0	09:05:24	0
2060001	99	53	6,29	cyclictest	2132520	-21	ntpq	09:55:29	1
2060001	99	53	6,29	cyclictest	2132520	-21	ntpq	09:55:28	1
2060001	99	53	5,44	cyclictest	2275502	-21	ssh	12:35:36	1
2060001	99	53	45,6	cyclictest	2077922	-21	kworker/u4:12+events_unbound	08:40:20	1
2060001	99	53	45,5	cyclictest	2245954	-21	kworker/u4:4+events_unbound	12:21:17	1
2060001	99	53	32,17	cyclictest	0	-21	swapper/1	11:05:14	1
2060001	99	52	44,6	cyclictest	2181301	-21	/usr/sbin/munin	10:50:12	1
2060001	99	52	43,7	cyclictest	2127328	-21	aten2__	09:50:15	1
2060001	99	52	42,7	cyclictest	0	-21	swapper/1	10:25:14	1
2060001	99	52	40,8	cyclictest	0	-21	swapper/1	11:30:35	1
2060001	99	52	38,10	cyclictest	0	-21	swapper/1	12:25:32	1
2060001	99	51	43,6	cyclictest	2192473	-21	kworker/u4:12+events_unbound	11:21:00	1
2060001	99	51	43,6	cyclictest	2187321	-21	systemd	10:55:52	1
2060001	99	51	40,8	cyclictest	2239647	-21	gltestperf	11:55:20	1
2060001	99	51	35,9	cyclictest	0	-21	swapper/1	09:00:37	1
2060001	99	50	41,6	cyclictest	2109611	-21	fschecks_time	09:30:21	1
2060001	99	50	38,8	cyclictest	0	-21	swapper/1	07:20:43	1
2060001	99	50	2,37	cyclictest	2137060	-21	sh	10:00:28	1
2060001	99	49	40,7	cyclictest	2204871	-21	switchtime	11:15:41	1
2060001	99	49	40,6	cyclictest	2111420	-21	kworker/u4:4+events_unbound	10:25:00	1
2060001	99	49	39,8	cyclictest	2248540	-21	gltestperf	12:05:20	1
2060001	99	49	39,7	cyclictest	2163699	-21	fschecks_count	10:30:19	1
2060001	99	48	40,6	cyclictest	2095987	-21	ssh	09:15:21	1
2060001	99	48	40,6	cyclictest	2076691	-21	grep	08:15:00	1
2060001	99	48	39,7	cyclictest	2261059	-21	sendmail	12:20:01	1
2060001	99	48	39,7	cyclictest	2199837	-21	/usr/sbin/munin	11:10:25	1
2060001	99	48	39,6	cyclictest	2082271	-21	fschecks_time	08:35:19	1
2060001	99	48	39,6	cyclictest	2067759	-21	sendmail	07:40:01	1
2060001	99	47	38,6	cyclictest	2072435	-21	proc_pri	07:55:35	1
2060001	99	47	38,5	cyclictest	2161131	-21	kworker/u4:6-nfsiod	10:40:26	1
2060001	99	47	36,8	cyclictest	0	-21	swapper/1	09:35:34	1
2060001	99	47	35,8	cyclictest	0	-21	swapper/1	08:30:37	1
2060001	99	46	39,5	cyclictest	2227095	-21	wc	11:40:40	1
2060001	99	46	39,5	cyclictest	2077184	-21	fschecks_time	08:15:19	1
2060001	99	46	38,5	cyclictest	2124094	-21	grep	09:45:42	1
2060001	99	46	37,7	cyclictest	2057490	-21	kworker/u4:2+events_unbound	08:10:02	1
2060001	99	46	37,7	cyclictest	2057490	-21	kworker/u4:2+events_unbound	08:10:01	1
2060001	99	46	36,7	cyclictest	2061246	-21	modprobe	07:15:00	1
2060001	99	46	35,7	cyclictest	2068733	-21	switchtime	07:40:36	1
2060001	99	45	37,6	cyclictest	2104507	-21	latency_hist	09:25:01	1
2060001	99	45	37,5	cyclictest	2087404	-21	fschecks_count	08:55:20	1
2060001	99	45	36,7	cyclictest	0	-21	swapper/1	07:20:01	1
2060001	99	45	35,7	cyclictest	2065705	-21	fschecks_time	07:30:20	1
2060001	99	45	35,7	cyclictest	0	-21	swapper/1	10:35:19	1
2060001	99	45	31,10	cyclictest	0	-21	swapper/1	11:45:27	1
2060001	99	44	38,4	cyclictest	2250433	-21	kworker/u4:9-rpciod	12:30:19	1
2060001	99	44	37,4	cyclictest	2145447	-21	cut	10:10:18	1
2060001	99	44	36,5	cyclictest	2174877	-21	kworker/u4:12-rpciod	10:45:21	1
2060001	99	44	34,7	cyclictest	2210617	-21	kworker/u4:4-rpciod	11:35:39	1
2060001	99	44	30,10	cyclictest	2071364	-21	ls	07:50:38	1
2060001	99	43	34,5	cyclictest	0	-21	swapper/1	12:00:29	1
2060001	99	41	34,5	cyclictest	2085583	-21	unixbench_multi	08:45:40	1
2060001	99	41	27,10	cyclictest	2064569	-21	uname	07:25:20	1
2060001	99	37	28,7	cyclictest	0	-21	swapper/1	08:25:19	1
2060001	99	33	24,6	cyclictest	0	-21	swapper/1	07:10:03	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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