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 Tue Mar 24, 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
2045007	99	136	118,8	cyclictest	2229405	-21	kworker/u4:4+events_unbound	12:30:35	1
2045007	99	115	77,9	cyclictest	2138895	-21	apt-get	10:20:12	1
2045007	99	103	94,7	cyclictest	2242812	-21	kworker/u4:9+events_unbound	12:25:34	1
2045007	99	97	78,8	cyclictest	2224902	-21	kworker/u4:0+events_unbound	12:10:33	1
2045007	99	93	71,18	cyclictest	2141160	-21	kworker/u4:9+xprtiod	10:30:13	1
2045007	99	91	82,7	cyclictest	2238322	-21	kworker/u4:1+events_unbound	12:35:35	1
2045005	99	91	84,5	cyclictest	2055259	-21	kworker/u4:5+events_unbound	07:54:45	0
2045005	99	90	81,7	cyclictest	2114626	-21	kworker/u4:1+events_unbound	10:10:12	0
2045005	99	90	79,6	cyclictest	53	-21	kswapd0	10:20:13	0
2045005	99	88	77,8	cyclictest	2215929	-21	kworker/u4:3+events_unbound	12:00:31	0
2045007	99	87	73,7	cyclictest	2150143	-21	kworker/u4:13+events_unbound	11:05:20	1
2045005	99	87	81,4	cyclictest	2132100	-21	kworker/u4:2+events_unbound	10:25:14	0
2045007	99	84	76,6	cyclictest	2211473	-21	kworker/u4:14+events_unbound	11:45:31	1
2045005	99	84	75,6	cyclictest	2159127	-21	kworker/u4:0+events_unbound	11:00:19	0
2045007	99	83	77,4	cyclictest	2074689	-21	kworker/u4:12+events_unbound	09:09:59	1
2045005	99	83	76,5	cyclictest	2073390	-21	kworker/u4:4+events_unbound	09:40:06	0
2045005	99	82	73,6	cyclictest	2150143	-21	kworker/u4:13+events_unbound	10:50:21	0
2045007	99	79	71,6	cyclictest	2189801	-21	kworker/u4:8+events_unbound	11:30:27	1
2045007	99	79	71,6	cyclictest	2159127	-21	kworker/u4:0+events_unbound	11:15:23	1
2045005	99	78	69,6	cyclictest	2114626	-21	kworker/u4:1+events_unbound	09:55:07	0
2045007	99	77	70,5	cyclictest	2215930	-21	kworker/u4:5+events_unbound	12:20:37	1
2045005	99	77	66,5	cyclictest	2105563	-21	kworker/u4:11+events_unbound	09:45:06	0
2045005	99	76	69,5	cyclictest	2073390	-21	kworker/u4:4+events_unbound	10:35:16	0
2045007	99	74	67,5	cyclictest	2127592	-21	kworker/u4:12+events_unbound	10:15:12	1
2045005	99	74	63,8	cyclictest	2189801	-21	kworker/u4:8+events_unbound	11:35:27	0
2045005	99	72	65,5	cyclictest	2044919	-21	kworker/u4:18+events_unbound	07:14:38	0
2045005	99	70	62,6	cyclictest	2078876	-21	kworker/u4:10+events_unbound	09:30:04	0
2045005	99	69	61,6	cyclictest	2127592	-21	kworker/u4:12+events_unbound	10:15:16	0
2045007	99	68	54,6	cyclictest	2119163	-21	kworker/u4:11+events_unbound	10:00:09	1
2045007	99	68	50,5	cyclictest	2159127	-21	kworker/u4:0+events_unbound	11:01:09	1
2045005	99	68	60,6	cyclictest	2070850	-21	kworker/u4:13+events_unbound	08:50:00	0
2045007	99	67	58,6	cyclictest	53	-21	kswapd0	10:45:17	1
2045005	99	67	59,6	cyclictest	2242144	-21	kworker/u4:8+events_unbound	12:30:04	0
2045005	99	66	59,5	cyclictest	2211475	-21	kworker/u4:16+events_unbound	11:45:36	0
2045005	99	66	43,16	cyclictest	2252777	-21	sshd	12:29:30	0
2045005	99	65	59,4	cyclictest	53	-21	kswapd0	10:40:19	0
2045005	99	65	58,5	cyclictest	2114626	-21	kworker/u4:1+events_unbound	10:05:09	0
2045007	99	63	53,7	cyclictest	2063090	-21	kworker/u4:1+events_unbound	08:40:00	1
2045005	99	62	54,6	cyclictest	2162975	-21	kworker/u4:12+events_unbound	10:55:21	0
2045005	99	62	43,17	cyclictest	2112527	-21	/usr/sbin/munin	09:50:21	0
2045005	99	61	54,5	cyclictest	2064475	-21	kworker/u4:10+events_unbound	08:34:53	0
2045005	99	61	53,6	cyclictest	2242812	-21	kworker/u4:9+events_unbound	12:24:59	0
2045007	99	60	52,6	cyclictest	2215929	-21	kworker/u4:3+events_unbound	12:00:00	1
2045007	99	59	48,7	cyclictest	2157298	-21	ld	10:40:25	1
2045005	99	59	52,4	cyclictest	2044927	-21	kworker/u4:26+events_unbound	08:05:00	0
2045005	99	58	50,6	cyclictest	2100973	-21	kworker/u4:3+events_unbound	10:01:59	0
2045005	99	58	50,6	cyclictest	2073390	-21	kworker/u4:4+events_unbound	09:35:06	0
2045005	99	57	49,6	cyclictest	2159127	-21	kworker/u4:0+events_unbound	11:10:22	0
2045005	99	57	49,6	cyclictest	2047492	-21	kworker/u4:0+events_unbound	07:49:43	0
2045005	99	57	49,6	cyclictest	2047492	-21	kworker/u4:0+events_unbound	07:49:43	0
2045007	99	56	48,6	cyclictest	2078876	-21	kworker/u4:10+events_unbound	09:33:59	1
2045005	99	56	46,7	cyclictest	53	-21	kswapd0	11:45:01	0
2045005	99	55	46,6	cyclictest	0	-21	swapper/0	10:30:30	0
2045005	99	55	33,19	cyclictest	2085679	-21	fschecks_time	09:20:20	0
2045005	99	54	42,9	cyclictest	2187971	-21	sshd	11:15:21	0
2045005	99	53	46,5	cyclictest	2044910	-21	kworker/u4:4+events_unbound	07:15:02	0
2045005	99	53	30,20	cyclictest	0	-21	swapper/0	12:35:30	0
2045007	99	52	45,5	cyclictest	2197262	-21	mailstats	11:25:39	1
2045007	99	52	45,5	cyclictest	2183723	-21	gcc	11:10:27	1
2045005	99	52	45,5	cyclictest	2200774	-21	/usr/sbin/munin	11:30:17	0
2045005	99	52	43,7	cyclictest	2082088	-21	unixbench_singl	09:15:39	0
2045005	99	52	42,6	cyclictest	2044922	-21	kworker/u4:21+events_unbound	09:15:01	0
2045007	99	51	42,6	cyclictest	2044920	-21	kworker/u4:19+events_unbound	08:09:47	1
2045007	99	51	40,9	cyclictest	2205846	-21	sh	11:35:35	1
2045007	99	51	40,8	cyclictest	2107425	-21	latency_hist	09:45:01	1
2045005	99	51	43,5	cyclictest	2179314	-21	/usr/sbin/munin	11:05:27	0
2045007	99	50	43,5	cyclictest	2232581	-21	timerwakeupswit	12:05:38	1
2045007	99	50	43,5	cyclictest	2063689	-21	fschecks_count	08:20:27	1
2045007	99	50	42,6	cyclictest	2215926	-21	kworker/u4:1+events_unbound	11:50:02	1
2045007	99	50	41,7	cyclictest	2152804	-21	/usr/sbin/munin	10:35:23	1
2045007	99	50	41,7	cyclictest	2080452	-21	systemd	09:15:00	1
2045007	99	50	41,7	cyclictest	2046633	-21	df_abs	07:15:18	1
2045007	99	50	40,8	cyclictest	2165770	-21	fschecks_count	10:50:21	1
2045007	99	50	40,7	cyclictest	2073390	-21	kworker/u4:4+rpciod	09:20:16	1
2045005	99	50	39,9	cyclictest	2162047	-21	/usr/sbin/munin	10:45:40	0
2045007	99	49	43,4	cyclictest	2108686	-21	mailstats	09:45:37	1
2045007	99	49	42,5	cyclictest	2050385	-21	aten2__	07:30:16	1
2045007	99	49	39,8	cyclictest	2099711	-21	mailstats	09:35:39	1
2045007	99	49	35,6	cyclictest	2136575	-21	kworker/u4:1+events_unbound	10:26:40	1
2045005	99	49	42,5	cyclictest	0	-21	swapper/0	12:10:01	0
2045005	99	49	41,6	cyclictest	2215930	-21	kworker/u4:5+events_unbound	12:20:00	0
2045005	99	49	40,7	cyclictest	2044918	-21	kworker/u4:17+events_unbound	07:29:40	0
2045007	99	48	41,5	cyclictest	2170634	-21	ssh	10:55:31	1
2045007	99	48	41,5	cyclictest	0	-21	swapper/1	11:20:14	1
2045007	99	48	39,5	cyclictest	0	-21	swapper/1	09:25:38	1
2045005	99	48	40,6	cyclictest	2073389	-21	kworker/u4:3+events_unbound	08:59:57	0
2045005	99	48	40,5	cyclictest	2189801	-21	kworker/u4:8+events_unbound	11:24:41	0
2045007	99	47	40,5	cyclictest	2185314	-21	kworker/u4:3+events_unbound	11:40:16	1
2045005	99	47	40,5	cyclictest	2235802	-21	munin-node	12:10:12	0
2045005	99	47	39,6	cyclictest	2057887	-21	kworker/u4:7+events_unbound	08:24:52	0
2045005	99	47	38,7	cyclictest	2050512	-21	cpu	07:30:16	0
2045005	99	47	37,7	cyclictest	2044918	-21	kworker/u4:17-xprtiod	07:35:17	0
2045007	99	46	40,4	cyclictest	2067071	-21	latency_hist	08:35:01	1
2045007	99	46	39,5	cyclictest	2067011	-21	kworker/u4:5+events_unbound	09:16:00	1
2045007	99	46	38,6	cyclictest	0	-21	swapper/1	08:00:36	1
2045007	99	46	37,6	cyclictest	53	-21	kswapd0	10:15:00	1
2045007	99	46	35,8	cyclictest	2072251	-21	latency_hist	08:55:01	1
2045007	99	46	33,10	cyclictest	2044922	-21	kworker/u4:21+events_unbound	07:55:01	1
2045005	99	46	38,6	cyclictest	2057891	-21	kworker/u4:9+events_unbound	08:39:52	0
2045005	99	46	36,8	cyclictest	2159129	-21	kworker/u4:5+events_unbound	11:25:30	0
2045005	99	46	27,6	cyclictest	2215929	-21	kworker/u4:3+events_unbound	11:50:41	0
2045007	99	45	37,6	cyclictest	2044927	-21	kworker/u4:26+events_unbound	08:29:52	1
2045007	99	45	36,7	cyclictest	2073575	-21	latency_hist	09:00:02	1
2045007	99	45	35,8	cyclictest	2240836	-21	ntpq	12:15:26	1
2045007	99	45	35,8	cyclictest	2126153	-21	kernelversion	10:05:22	1
2045007	99	45	35,8	cyclictest	2112234	-21	aten_r7power_po	09:50:16	1
2045005	99	45	36,5	cyclictest	2215931	-21	kworker/u4:6+events_unbound	11:56:01	0
2045005	99	45	33,7	cyclictest	256	50	irq/23-42890000.ethernet	09:30:00	0
2045005	99	45	19,23	cyclictest	2059651	-21	fschecks_count	08:05:19	0
2045007	99	44	37,5	cyclictest	2061904	-21	apt-key	08:15:01	1
2045007	99	44	36,6	cyclictest	2063091	-21	kworker/u4:3+events_unbound	08:19:52	1
2045007	99	44	36,6	cyclictest	2052741	-21	ls	07:40:00	1
2045007	99	44	35,6	cyclictest	2048917	-21	sh	07:25:00	1
2045007	99	44	34,7	cyclictest	0	-21	swapper/1	08:50:00	1
2045005	99	44	37,5	cyclictest	2074687	-21	kworker/u4:8+events_unbound	09:04:58	0
2045005	99	44	36,6	cyclictest	2048102	-21	fschecks_count	07:20:22	0
2045005	99	44	36,5	cyclictest	2076036	-21	sort	09:10:02	0
2045005	99	44	35,7	cyclictest	2071119	-21	aten_r7power_en	08:50:17	0
2045005	99	44	30,11	cyclictest	2063039	-21	grep	08:15:44	0
2045007	99	43	37,4	cyclictest	2117440	-21	ntp_states	09:55:33	1
2045007	99	43	34,7	cyclictest	2053732	-21	switchtime	07:40:35	1
2045005	99	43	37,4	cyclictest	2052985	-21	aten_r7power_en	07:40:15	0
2045005	99	43	35,6	cyclictest	2044922	-21	kworker/u4:21+events_unbound	08:14:49	0
2045007	99	42	34,5	cyclictest	0	-21	swapper/1	07:10:23	1
2045007	99	42	33,6	cyclictest	0	-21	swapper/1	12:00:31	1
2045007	99	42	31,8	cyclictest	0	-21	swapper/1	07:50:02	1
2045007	99	42	31,8	cyclictest	0	-21	swapper/1	07:50:01	1
2045007	99	41	29,10	cyclictest	0	-21	swapper/1	08:40:16	1
2045007	99	41	29,10	cyclictest	0	-21	swapper/1	08:40:15	1
2045005	99	41	33,5	cyclictest	2057907	-21	cron	08:00:00	0
2045007	99	40	31,7	cyclictest	2049929	-21	threads	07:25:36	1
2045005	99	40	34,4	cyclictest	2068988	-21	kernelversion	08:40:22	0
2045005	99	40	34,4	cyclictest	2068988	-21	kernelversion	08:40:21	0
2045005	99	40	1,37	cyclictest	0	-21	swapper/0	08:25:37	0
2045007	99	38	28,7	cyclictest	2074787	-21	latency_hist	09:05:01	1
2045007	99	36	26,7	cyclictest	0	-21	swapper/1	07:55:16	1
2045007	99	34	25,7	cyclictest	2045064	-21	latency_hist	07:10:01	1
2045005	99	32	24,6	cyclictest	0	-21	swapper/0	07:10:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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