OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

Click here to display the system's profile data or here to proceed to next system.

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack0slot2.osadl.org (updated Thu May 21, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2044370	2	99	0,1	sleep7	2044371	-21	rm	11:23:03	7
1474360	99	55	52,2	cyclictest	1890523	-21	kworker/u16:1+events_unbound	10:42:47	4
1474360	99	51	49,2	cyclictest	1890523	-21	kworker/u16:1+events_unbound	10:23:00	4
1474366	99	50	48,2	cyclictest	2071586	-21	kworker/u16:2+events_unbound	12:23:00	6
1474370	99	49	43,4	cyclictest	2092716	-21	ntpq	11:43:04	7
1474366	99	48	45,2	cyclictest	1936165	-21	kworker/u16:2+events_unbound	10:52:52	6
1474366	99	47	44,2	cyclictest	2057278	-21	kworker/u16:0+flush-8:0	11:38:03	6
1474366	99	47	44,2	cyclictest	2057278	-21	kworker/u16:0+flush-8:0	11:38:03	6
1474360	99	47	45,2	cyclictest	2081408	-21	kworker/u16:3+events_unbound	11:43:08	4
1473921	2	47	36,8	sleep4	0	-21	swapper/4	07:05:37	4
1473904	2	47	37,7	sleep5	0	-21	swapper/5	07:05:22	5
1474366	99	45	43,2	cyclictest	2071586	-21	kworker/u16:2+events_unbound	12:32:52	6
1474366	99	44	42,2	cyclictest	1936165	-21	kworker/u16:2+events_unbound	10:44:16	6
1474366	99	44	42,2	cyclictest	1829460	-21	kworker/u16:0+events_unbound	10:38:03	6
1474366	99	43	40,2	cyclictest	2057278	-21	kworker/u16:0+events_unbound	11:33:08	6
1474360	99	43	41,2	cyclictest	2071586	-21	kworker/u16:2+flush-8:0	12:28:03	4
1474360	99	42	40,2	cyclictest	2071586	-21	kworker/u16:2+events_unbound	12:08:03	4
1474360	99	42	40,2	cyclictest	1535418	-21	kworker/u16:1+flush-8:0	09:16:03	4
1473859	2	42	5,31	sleep7	0	-21	swapper/7	07:04:44	7
1474366	99	41	39,2	cyclictest	1839611	-21	kworker/u16:5+events_unbound	10:18:03	6
1474366	99	41	39,2	cyclictest	1839611	-21	kworker/u16:5+events_unbound	10:18:03	6
1474370	99	40	0,38	cyclictest	2069109	-21	awk	11:33:08	7
1474366	99	40	38,2	cyclictest	2095802	-21	kworker/u16:0+flush-8:0	11:47:54	6
1474366	99	40	38,2	cyclictest	2071586	-21	kworker/u16:2+events_unbound	11:52:48	6
1474366	99	40	38,2	cyclictest	1890523	-21	kworker/u16:1+events_unbound	12:02:52	6
1474370	99	39	36,2	cyclictest	1971868	-21	processes	10:53:04	7
1474366	99	39	36,2	cyclictest	2008784	-21	kworker/u16:4+flush-8:0	11:17:51	6
1474370	99	38	35,2	cyclictest	124	-21	kswapd0	11:02:47	7
1474360	99	38	36,2	cyclictest	2095802	-21	kworker/u16:0+events_unbound	11:48:03	4
1474370	99	37	32,4	cyclictest	1962676	-21	latency_hist	10:52:34	7
1474366	99	37	34,2	cyclictest	1890523	-21	kworker/u16:1+flush-8:0	10:57:36	6
1474366	99	37	34,2	cyclictest	1890523	-21	kworker/u16:1+flush-8:0	10:57:36	6
1474364	99	37	35,2	cyclictest	2095802	-21	kworker/u16:0+events_unbound	11:58:03	5
1474360	99	37	35,2	cyclictest	1986914	-21	kworker/u16:0+flush-8:0	11:12:47	4
1474360	99	37	35,2	cyclictest	1793204	-21	kworker/u16:3+events_unbound	09:57:34	4
1474364	99	36	34,2	cyclictest	1890523	-21	kworker/u16:1+events_unbound	11:03:00	5
1474360	99	36	34,2	cyclictest	1839611	-21	kworker/u16:5+events_unbound	10:31:44	4
1474366	99	35	33,2	cyclictest	1890523	-21	kworker/u16:1+events_unbound	10:27:16	6
1474366	99	35	33,2	cyclictest	1793204	-21	kworker/u16:3+events_unbound	09:47:34	6
1474366	99	35	33,2	cyclictest	1651036	-21	kworker/u16:3+events_unbound	08:52:59	6
1474366	99	35	32,2	cyclictest	1890523	-21	kworker/u16:1+events_unbound	11:02:56	6
1474360	99	35	34,1	cyclictest	1839611	-21	kworker/u16:5+events_unbound	10:05:52	4
1474360	99	35	33,2	cyclictest	1890523	-21	kworker/u16:1+flush-8:0	10:33:01	4
1474360	99	35	33,2	cyclictest	1829460	-21	kworker/u16:0+flush-8:0	10:37:48	4
1474370	99	34	0,33	cyclictest	5819	-21	gnome-shell	11:20:43	7
1474366	99	34	32,2	cyclictest	2095802	-21	kworker/u16:0+flush-8:0	12:08:05	6
1474366	99	34	32,2	cyclictest	1829460	-21	kworker/u16:0+flush-8:0	10:32:34	6
1474366	99	34	32,1	cyclictest	1535418	-21	kworker/u16:1+events_unbound	09:37:36	6
1474366	99	34	32,1	cyclictest	1535418	-21	kworker/u16:1+events_unbound	09:37:36	6
1474364	99	34	32,2	cyclictest	2179663	-21	kworker/u16:3+events_unbound	12:33:00	5
1474360	99	34	32,2	cyclictest	1890523	-21	kworker/u16:1+flush-8:0	10:57:15	4
1474360	99	34	32,2	cyclictest	1779982	-21	kworker/u16:2+flush-8:0	09:45:55	4
1474370	99	33	31,1	cyclictest	2102046	-21	ssh	11:47:55	7
1474370	99	33	29,3	cyclictest	124	-21	kswapd0	10:57:47	7
1474370	99	33	29,3	cyclictest	124	-21	kswapd0	10:57:47	7
1474370	99	33	27,5	cyclictest	1670166	-21	latency_hist	08:47:35	7
1474366	99	33	31,2	cyclictest	2071586	-21	kworker/u16:2+events_unbound	12:19:44	6
1474366	99	33	31,2	cyclictest	2071586	-21	kworker/u16:2+events_unbound	12:19:44	6
1474366	99	33	31,2	cyclictest	1986914	-21	kworker/u16:0+events_unbound	11:13:06	6
1474366	99	33	31,2	cyclictest	1793204	-21	kworker/u16:3+events_unbound	09:48:44	6
1474366	99	33	31,2	cyclictest	1209176	-21	kworker/u16:1+events_unbound	07:08:00	6
1474360	99	33	31,2	cyclictest	2057278	-21	kworker/u16:0+events_unbound	11:37:49	4
1474360	99	33	31,2	cyclictest	2057278	-21	kworker/u16:0+events_unbound	11:37:49	4
1474360	99	33	31,2	cyclictest	1890523	-21	kworker/u16:1+events_unbound	11:36:43	4
1474360	99	33	31,2	cyclictest	1602628	-21	kworker/u16:0+events_unbound	09:41:44	4
1474360	99	33	31,2	cyclictest	1602628	-21	kworker/u16:0+events_unbound	09:41:44	4
1474370	99	32	26,5	cyclictest	1914268	-21	latency_hist	10:32:34	7
1474366	99	32	30,2	cyclictest	2057278	-21	kworker/u16:0+flush-8:0	11:31:44	6
1474366	99	32	30,2	cyclictest	1651036	-21	kworker/u16:3+events_unbound	09:11:44	6
1474360	99	32	30,2	cyclictest	1535418	-21	kworker/u16:1+events_unbound	09:47:36	4
1474370	99	31	27,2	cyclictest	1535753	-21	munin-run	07:37:34	7
1474366	99	31	29,2	cyclictest	1890523	-21	kworker/u16:1+events_unbound	11:57:47	6
1474366	99	31	29,2	cyclictest	1793204	-21	kworker/u16:3+flush-8:0	10:17:19	6
1474366	99	31	29,2	cyclictest	1651036	-21	kworker/u16:3+events_unbound	09:20:44	6
1474364	99	31	29,2	cyclictest	1535418	-21	kworker/u16:1+flush-8:0	09:17:56	5
1474364	99	31	29,2	cyclictest	1535418	-21	kworker/u16:1+flush-8:0	08:22:49	5
1474360	99	31	29,2	cyclictest	2213711	-21	kworker/u16:4+events_unbound	12:37:30	4
1474360	99	31	29,2	cyclictest	2035322	-21	kworker/u16:2+flush-8:0	11:28:07	4
1474360	99	31	29,2	cyclictest	1890523	-21	kworker/u16:1+flush-8:0	10:47:44	4
1474360	99	31	29,2	cyclictest	1602628	-21	kworker/u16:0+flush-8:0	09:23:36	4
1473840	2	31	21,7	sleep6	0	-21	swapper/6	07:04:27	6
1474366	99	30	28,2	cyclictest	1744803	-21	kworker/u16:2+flush-8:0	09:23:24	6
1474360	99	30	28,2	cyclictest	2165101	-21	kworker/u16:1+flush-8:0	12:17:49	4
1474360	99	30	28,2	cyclictest	2165101	-21	kworker/u16:1+flush-8:0	12:17:49	4
1474360	99	30	28,2	cyclictest	2008784	-21	kworker/u16:4+events_unbound	11:11:44	4
1474360	99	30	27,2	cyclictest	3158215	-21	fwupd	09:58:41	4
1474360	99	30	27,2	cyclictest	2008784	-21	kworker/u16:4+events_unbound	11:25:44	4
1999748	2	29	0,1	chrt	0	-21	swapper/5	11:07:46	5
1474370	99	29	27,1	cyclictest	2128933	-21	strings	11:57:59	7
1474366	99	29	27,2	cyclictest	2081408	-21	kworker/u16:3+events_unbound	11:43:43	6
1474366	99	29	27,2	cyclictest	1961980	-21	kworker/u16:0+events_unbound	10:51:44	6
1474370	99	28	27,0	cyclictest	0	-21	swapper/7	10:41:44	7
1474366	99	28	26,2	cyclictest	1602628	-21	kworker/u16:0+flush-8:0	08:47:34	6
1474366	99	28	26,2	cyclictest	1535418	-21	kworker/u16:1+events_unbound	09:34:23	6
1474366	99	28	25,2	cyclictest	2095802	-21	kworker/u16:0+events_unbound	12:13:08	6
1474364	99	28	26,2	cyclictest	1602628	-21	kworker/u16:0+flush-8:0	08:42:50	5
1474364	99	28	26,2	cyclictest	1535418	-21	kworker/u16:1+events_unbound	07:57:48	5
1474360	99	28	26,2	cyclictest	1535418	-21	kworker/u16:1+flush-8:0	09:19:44	4
1767239	2	27	0,1	chrt	1767240	-21	ssh	09:29:22	7
1474370	99	27	26,0	cyclictest	0	-21	swapper/7	09:57:16	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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