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 50 highest latencies:

System rack0slot2.osadl.org (updated Tue Dec 30, 2025 12:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1443582	2	95	0,1	sleep5	74	1	rcuc/5	10:29:10	5
1044010	2	56	46,7	sleep6	0	-21	swapper/6	07:05:36	6
1044065	2	53	43,7	sleep4	0	-21	swapper/4	07:06:22	4
1044011	2	53	18,31	sleep7	0	-21	swapper/7	07:05:37	7
1044511	99	45	42,2	cyclictest	971236	-21	kworker/u16:4+flush-8:0	07:23:48	4
1044511	99	40	38,2	cyclictest	1221558	-21	kworker/u16:5+events_unbound	08:38:48	4
1044209	2	39	28,8	sleep5	0	-21	swapper/5	07:08:24	5
1044519	99	37	31,5	cyclictest	1232485	-21	latency_hist	08:43:48	7
1044516	99	36	34,2	cyclictest	1572048	-21	kworker/u16:1+flush-8:0	12:34:01	5
1044516	99	35	33,2	cyclictest	1251509	-21	kworker/u16:0+events_unbound	11:59:09	5
1044516	99	34	32,2	cyclictest	1136651	-21	kworker/u16:4+flush-8:0	08:09:14	5
1044516	99	34	31,2	cyclictest	1041113	-21	kworker/u16:0+events_unbound	07:19:02	5
1044519	99	33	29,3	cyclictest	650	-21	systemd-journal	12:03:47	7
1044518	99	33	30,2	cyclictest	1067549	-21	kworker/u16:2+flush-8:0	07:59:03	6
1044516	99	33	31,2	cyclictest	1251509	-21	kworker/u16:0+flush-8:0	09:43:48	5
1044511	99	33	31,2	cyclictest	1251509	-21	kworker/u16:0+flush-8:0	10:18:47	4
1044511	99	33	31,2	cyclictest	1251509	-21	kworker/u16:0+flush-8:0	10:18:47	4
1044518	99	32	29,2	cyclictest	1236790	-21	kworker/u16:2+flush-8:0	09:29:13	6
1044516	99	32	29,2	cyclictest	1173946	-21	kworker/u16:1+events_unbound	08:39:06	5
1044511	99	32	30,2	cyclictest	1251509	-21	kworker/u16:0+flush-8:0	10:13:47	4
1064902	2	30	0,1	chrt	1064901	-21	cut	07:14:10	7
1044518	99	30	27,2	cyclictest	1251509	-21	kworker/u16:0+flush-8:0	10:54:13	6
1044511	99	28	25,2	cyclictest	1650889	-21	kworker/u16:2+flush-8:0	12:34:12	4
1044518	99	27	24,2	cyclictest	971236	-21	kworker/u16:4+flush-8:0	07:09:05	6
1044516	99	27	24,2	cyclictest	1096740	-21	kworker/u16:0+events_unbound	07:54:03	5
1044511	99	27	25,2	cyclictest	1426200	-21	kworker/u16:1+flush-8:0	10:33:43	4
1044516	99	26	24,2	cyclictest	1508583	-21	kworker/u16:3+events_unbound	11:04:10	5
1044516	99	26	24,2	cyclictest	1465560	-21	kworker/u16:4+flush-8:0	12:04:07	5
1044516	99	26	24,2	cyclictest	1446134	-21	kworker/u16:3+flush-8:0	10:39:13	5
1044516	99	26	23,2	cyclictest	1523549	-21	kworker/u16:2+events_unbound	11:14:06	5
1044511	99	26	23,2	cyclictest	1261769	-21	kworker/u16:1+flush-8:0	08:59:05	4
1044511	99	26	22,3	cyclictest	1251509	-21	kworker/u16:0+flush-8:0	10:19:05	4
1044511	99	25	21,3	cyclictest	971236	-21	kworker/u16:4+flush-8:0	07:14:14	4
1301894	2	24	0,1	chrt	0	-21	swapper/4	09:19:06	4
1044511	99	24	21,2	cyclictest	1523549	-21	kworker/u16:2+events_unbound	11:19:02	4
1044511	99	24	21,2	cyclictest	1465560	-21	kworker/u16:4+events_unbound	12:19:13	4
1044511	99	24	20,3	cyclictest	1236790	-21	kworker/u16:2+flush-8:0	09:09:05	4
1596396	2	23	0,1	chrt	0	-21	swapper/6	11:49:08	6
1596396	2	23	0,1	chrt	0	-21	swapper/6	11:49:08	6
1084257	2	23	0,1	chrt	0	-21	swapper/5	07:24:09	5
1044511	99	23	20,2	cyclictest	1251509	-21	kworker/u16:0+events_unbound	10:44:14	4
1044518	99	22	20,1	cyclictest	0	-21	swapper/6	10:09:48	6
1044511	99	22	20,2	cyclictest	1251509	-21	kworker/u16:0+events_unbound	10:58:42	4
1044511	99	22	20,2	cyclictest	1067549	-21	kworker/u16:2+flush-8:0	07:44:19	4
1044518	99	21	15,6	cyclictest	0	-21	swapper/6	09:59:48	6
1044516	99	21	19,2	cyclictest	1236790	-21	kworker/u16:2+events_unbound	08:44:13	5
1044511	99	21	18,2	cyclictest	1251509	-21	kworker/u16:0+flush-8:0	09:14:19	4
1044516	99	20	16,3	cyclictest	1610853	-21	pool-/usr/libex	11:58:44	5
1044511	99	20	18,2	cyclictest	1251509	-21	kworker/u16:0+flush-8:0	09:54:14	4
1213087	2	19	0,0	sleep4	0	-21	swapper/4	08:33:47	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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