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 Jun 06, 2026 00:44:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2244926	99	113	103,7	cyclictest	2233488	-21	kworker/u4:15+events_unbound	20:10:36	1
2244926	99	110	99,9	cyclictest	2229652	-21	kworker/u4:4+events_unbound	19:50:33	1
2244926	99	104	94,7	cyclictest	2246158	-21	kworker/u4:9+events_unbound	19:25:26	1
2244926	99	100	92,6	cyclictest	2275631	-21	kworker/u4:16+events_unbound	21:25:56	1
2244925	99	94	86,5	cyclictest	2260216	-21	kworker/u4:7+events_unbound	20:40:44	0
2244926	99	93	84,7	cyclictest	2246156	-21	kworker/u4:5+events_unbound	19:15:24	1
2244926	99	83	75,5	cyclictest	2395733	-21	kworker/u4:3+events_unbound	23:30:01	1
2244925	99	82	51,22	cyclictest	53	-21	kswapd0	00:25:14	0
2244925	99	80	71,7	cyclictest	37	-21	kcompactd0	00:05:09	0
2244926	99	78	61,9	cyclictest	0	-21	swapper/1	21:20:35	1
2244926	99	77	67,6	cyclictest	2330391	-21	kworker/u4:1+events_unbound	22:21:07	1
2244926	99	76	67,7	cyclictest	2256380	-21	kworker/u4:1+events_unbound	20:30:39	1
2244926	99	76	67,7	cyclictest	2248737	-21	kworker/u4:3+events_unbound	20:05:35	1
2244926	99	73	59,7	cyclictest	2334764	-21	kworker/u4:5+events_unbound	22:40:00	1
2244925	99	73	50,15	cyclictest	53	-21	kswapd0	23:40:14	0
2244925	99	73	43,28	cyclictest	2395021	-21	sshd	23:26:19	0
2244926	99	72	63,7	cyclictest	2233488	-21	kworker/u4:15+events_unbound	19:40:31	1
2244925	99	72	37,32	cyclictest	0	-21	swapper/0	20:35:42	0
2244925	99	72	36,32	cyclictest	2256414	-21	idleruntime-cro	19:54:59	0
2244926	99	71	64,5	cyclictest	2343587	-21	kworker/u4:8+events_unbound	22:31:10	1
2244926	99	71	5,60	cyclictest	2376705	-21	ssh	23:05:29	1
2244925	99	70	36,31	cyclictest	2290700	-21	sshd	21:25:57	0
2244925	99	70	33,34	cyclictest	0	-21	swapper/0	00:10:26	0
2244925	99	69	59,7	cyclictest	2382531	-21	kworker/u4:9+events_unbound	23:40:01	0
2244925	99	69	41,26	cyclictest	2285477	-21	kernelversion	21:20:28	0
2244925	99	69	35,30	cyclictest	2258106	-21	fschecks_count	20:00:21	0
2244926	99	68	61,5	cyclictest	2250006	-21	kworker/u4:13+events_unbound	19:40:01	1
2244925	99	68	38,27	cyclictest	0	-21	swapper/0	00:25:00	0
2244925	99	68	3,18	cyclictest	2333631	-21	ps	22:15:40	0
2244925	99	68	19,46	cyclictest	0	-21	swapper/0	23:25:02	0
2244926	99	67	60,5	cyclictest	2369323	-21	kworker/u4:13+events_unbound	23:01:14	1
2244925	99	67	4,10	cyclictest	2423536	-21	ssh	00:00:11	0
2244925	99	67	36,28	cyclictest	2281653	-21	unixbench_multi	21:15:41	0
2244925	99	67	35,29	cyclictest	0	-21	swapper/0	20:20:30	0
2244925	99	67	28,36	cyclictest	2403856	-21	kworker/u4:13-events_unbound	23:55:00	0
2244925	99	67	2,19	cyclictest	2254621	-21	ntpq	19:45:28	0
2244925	99	67	21,42	cyclictest	15	1	ktimers/0	19:55:27	0
2244926	99	66	59,5	cyclictest	2438263	-21	kworker/u4:10+events_unbound	00:17:01	1
2244925	99	66	34,30	cyclictest	2274299	-21	unixbench_singl	21:00:37	0
2244925	99	65	2,15	cyclictest	2315301	-21	apt-get	21:55:11	0
2244925	99	64	3,21	cyclictest	2311870	-21	ssh	21:50:36	0
2244925	99	64	31,29	cyclictest	2247971	-21	fschecks_time	19:20:18	0
2244925	99	64	30,31	cyclictest	0	-21	swapper/0	23:30:23	0
2244925	99	64	30,31	cyclictest	0	-21	swapper/0	22:35:30	0
2244925	99	64	28,32	cyclictest	0	-21	swapper/0	23:55:19	0
2244925	99	64	1,18	cyclictest	2272650	-21	ntpq	20:55:34	0
2244926	99	63	54,6	cyclictest	2246158	-21	kworker/u4:9+events_unbound	19:20:27	1
2244925	99	63	5,8	cyclictest	2324836	-21	ntp_states	22:05:32	0
2244925	99	63	4,19	cyclictest	2367972	-21	ssh	22:55:27	0
2244925	99	63	31,28	cyclictest	0	-21	swapper/0	21:30:35	0
2244925	99	63	20,9	cyclictest	2337860	-21	sh	22:20:33	0
2244925	99	63	1,15	cyclictest	2362973	-21	apt-get	22:50:11	0
2244926	99	62	55,5	cyclictest	2229652	-21	kworker/u4:4+events_unbound	19:10:23	1
2244925	99	62	28,31	cyclictest	0	-21	swapper/0	22:40:34	0
2244925	99	62	25,34	cyclictest	2450440	-21	timerandwakeup	00:30:43	0
2244925	99	62	25,34	cyclictest	0	-21	swapper/0	19:10:00	0
2244925	99	62	22,37	cyclictest	2233488	-21	kworker/u4:15-rpciod	20:10:00	0
2244925	99	62	2,11	cyclictest	2328332	-21	ssh	22:10:11	0
2244926	99	61	47,9	cyclictest	2271808	-21	modprobe	20:55:00	1
2244925	99	61	29,30	cyclictest	2372393	-21	ntp_offset	23:00:31	0
2244925	99	61	29,29	cyclictest	0	-21	swapper/0	00:35:25	0
2244925	99	61	29,29	cyclictest	0	-21	swapper/0	00:35:24	0
2244925	99	61	26,32	cyclictest	2261683	-21	aten2__	20:15:15	0
2244925	99	61	2,15	cyclictest	2276660	-21	ntpq	21:10:25	0
2244926	99	60	52,6	cyclictest	2325990	-21	kworker/u4:8+events_unbound	22:16:07	1
2244925	99	60	51,7	cyclictest	2385326	-21	ntp_kernel_pll_	23:15:26	0
2244925	99	60	51,7	cyclictest	2385326	-21	ntp_kernel_pll_	23:15:26	0
2244925	99	60	32,26	cyclictest	53	-21	kswapd0	23:10:09	0
2244925	99	60	31,26	cyclictest	0	-21	swapper/0	21:10:01	0
2244925	99	60	28,29	cyclictest	0	-21	swapper/0	22:30:28	0
2244925	99	60	28,28	cyclictest	0	-21	swapper/0	22:00:37	0
2244925	99	60	27,30	cyclictest	0	-21	swapper/0	00:15:30	0
2244925	99	59	27,30	cyclictest	0	-21	swapper/0	20:45:17	0
2244925	99	59	27,29	cyclictest	0	-21	swapper/0	19:35:19	0
2244925	99	59	26,30	cyclictest	0	-21	swapper/0	19:30:17	0
2244925	99	59	26,29	cyclictest	0	-21	swapper/0	20:30:01	0
2244925	99	59	25,32	cyclictest	2302783	-21	gltestperf	21:40:20	0
2244925	99	59	23,33	cyclictest	0	-21	swapper/0	22:45:31	0
2244926	99	58	49,6	cyclictest	2403856	-21	kworker/u4:13+events_unbound	00:05:02	1
2244925	99	58	30,25	cyclictest	0	-21	swapper/0	23:06:12	0
2244925	99	58	25,30	cyclictest	0	-21	swapper/0	21:45:17	0
2244925	99	58	2,14	cyclictest	2246951	-21	ntpq	19:15:29	0
2244926	99	57	47,7	cyclictest	2361215	-21	kworker/u4:6+events_unbound	23:20:01	1
2244926	99	57	47,7	cyclictest	2361215	-21	kworker/u4:6+events_unbound	23:20:01	1
2244926	99	57	2,39	cyclictest	2311873	-21	ssh	21:50:35	1
2244925	99	57	3,16	cyclictest	2261073	-21	ntpq	20:10:33	0
2244925	99	57	24,30	cyclictest	0	-21	swapper/0	23:45:52	0
2244925	99	57	20,34	cyclictest	0	-21	swapper/0	20:50:16	0
2244925	99	57	18,35	cyclictest	0	-21	swapper/0	20:35:02	0
2244925	99	57	1,18	cyclictest	2298998	-21	ssh	21:35:37	0
2244926	99	56	49,5	cyclictest	2260216	-21	kworker/u4:7+events_unbound	20:20:40	1
2244926	99	56	47,6	cyclictest	2295688	-21	kworker/u4:5+events_unbound	21:35:57	1
2244926	99	56	40,13	cyclictest	0	-21	swapper/1	00:05:30	1
2244925	99	56	3,16	cyclictest	2245725	-21	ntpq	19:10:31	0
2244925	99	56	3,15	cyclictest	2253326	-21	ntpq	19:40:29	0
2244925	99	56	2,4	cyclictest	2249154	-21	diskstats	19:25:19	0
2244925	99	56	17,36	cyclictest	2345375	-21	kworker/u4:8	22:30:00	0
2244926	99	55	48,5	cyclictest	2400116	-21	kworker/u4:12+events_unbound	23:35:03	1
2244926	99	55	48,5	cyclictest	2262677	-21	unixbench_multi	20:15:36	1
2244926	99	55	44,9	cyclictest	2303832	-21	ssh	21:40:59	1
2244926	99	54	36,9	cyclictest	0	-21	swapper/1	23:20:29	1
2244926	99	53	45,6	cyclictest	2425831	-21	kworker/u4:7+events_unbound	00:33:51	1
2244926	99	53	43,7	cyclictest	53	-21	kswapd0	00:25:01	1
2244926	99	53	42,8	cyclictest	53	-21	kswapd0	23:40:14	1
2244926	99	52	44,6	cyclictest	2300143	-21	kworker/u4:2+events_unbound	22:06:03	1
2244926	99	52	41,6	cyclictest	0	-21	swapper/1	22:00:39	1
2244926	99	51	44,5	cyclictest	2445388	-21	fschecks_count	00:25:26	1
2244926	99	51	43,6	cyclictest	2260216	-21	kworker/u4:7+events_unbound	21:15:54	1
2244926	99	51	41,8	cyclictest	2260215	-21	kworker/u4:6+events_unbound	20:35:03	1
2244926	99	51	39,5	cyclictest	2434528	-21	kworker/u4:1+events_unbound	00:13:46	1
2244926	99	49	42,5	cyclictest	2395734	-21	kworker/u4:7+events_unbound	23:35:00	1
2244926	99	49	40,7	cyclictest	2274109	-21	switchtime	21:00:36	1
2244926	99	49	39,8	cyclictest	2246156	-21	kworker/u4:5+events_unbound	20:00:33	1
2244926	99	48	42,4	cyclictest	2268980	-21	switchtime	20:40:38	1
2244926	99	48	40,6	cyclictest	2359171	-21	gltestperf	22:45:21	1
2244926	99	48	40,5	cyclictest	0	-21	swapper/1	23:55:27	1
2244926	99	48	39,7	cyclictest	2035636	-21	kworker/u4:8+events_unbound	19:35:01	1
2244926	99	48	39,6	cyclictest	0	-21	swapper/1	22:55:27	1
2244926	99	47	40,5	cyclictest	2425831	-21	kworker/u4:7+events_unbound	00:38:00	1
2244926	99	47	40,5	cyclictest	2425831	-21	kworker/u4:7+events_unbound	00:37:59	1
2244926	99	47	39,6	cyclictest	2363554	-21	/usr/sbin/munin	22:50:22	1
2244926	99	47	39,5	cyclictest	2276291	-21	fschecks_count	21:10:19	1
2244926	99	47	38,7	cyclictest	2345390	-21	idleruntime-cro	22:29:59	1
2244926	99	45	5,32	cyclictest	2415582	-21	ssh	23:50:30	1
2244926	99	45	39,4	cyclictest	2293570	-21	aten2__	21:30:15	1
2244926	99	45	38,5	cyclictest	2386927	-21	kworker/u4:8+events_unbound	23:45:04	1
2244926	99	45	38,5	cyclictest	2354819	-21	gltestperf	22:40:20	1
2244926	99	45	38,5	cyclictest	2316423	-21	timerandwakeup	21:55:38	1
2244926	99	45	37,6	cyclictest	2257117	-21	ntpq	19:55:23	1
2244926	99	45	36,7	cyclictest	2306751	-21	aten_r7power_cu	21:45:17	1
2244926	99	45	36,6	cyclictest	0	-21	swapper/1	22:10:35	1
2244926	99	44	35,7	cyclictest	2256380	-21	kworker/u4:1+events_unbound	20:25:33	1
2244926	99	43	32,8	cyclictest	2246156	-21	kworker/u4:5+events_unbound	20:55:30	1
2244926	99	41	32,7	cyclictest	2380974	-21	ntpq	23:10:28	1
2244926	99	40	33,5	cyclictest	2270552	-21	idleruntime-cro	20:50:00	1
2244926	99	40	28,10	cyclictest	0	-21	swapper/1	19:45:20	1
2244926	99	38	28,7	cyclictest	0	-21	swapper/1	21:05:37	1
2244926	99	30	22,6	cyclictest	2244985	-21	latency_hist	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