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 Wed Jul 29, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
90490	2	56	46,7	sleep4	0	-21	swapper/4	19:06:19	4
90598	2	45	2,38	sleep7	0	-21	swapper/7	19:07:51	7
90483	2	42	32,7	sleep6	0	-21	swapper/6	19:06:13	6
90975	99	41	36,4	cyclictest	729308	-21	latency_hist	23:54:00	7
90491	2	41	31,7	sleep5	0	-21	swapper/5	19:06:20	5
90975	99	38	0,36	cyclictest	172721	-21	latency_hist	19:49:01	7
90969	99	38	36,2	cyclictest	510177	-21	kworker/u16:3+events_unbound	22:44:32	5
90975	99	37	36,0	cyclictest	0	-21	swapper/7	22:29:04	7
90975	99	36	0,34	cyclictest	648	-21	systemd-journal	23:59:01	7
90975	99	36	0,34	cyclictest	648	-21	systemd-journal	23:59:01	7
90974	99	35	33,2	cyclictest	559625	-21	kworker/u16:4+flush-8:0	23:19:16	6
90974	99	35	33,2	cyclictest	559625	-21	kworker/u16:4+flush-8:0	23:19:16	6
90975	99	34	30,3	cyclictest	617866	-21	sh	23:05:00	7
90969	99	34	32,2	cyclictest	241195	-21	kworker/u16:0+events_unbound	20:29:16	5
90975	99	33	32,0	cyclictest	0	-21	swapper/7	21:24:33	7
90975	99	33	31,1	cyclictest	789301	-21	ssh	00:17:49	7
90975	99	33	30,2	cyclictest	571745	-21	ssh	22:49:04	7
90975	99	32	30,1	cyclictest	0	-21	swapper/7	23:27:57	7
90975	99	32	26,5	cyclictest	741421	-21	latency_hist	23:59:01	7
90975	99	32	26,5	cyclictest	741421	-21	latency_hist	23:59:01	7
90969	99	32	30,2	cyclictest	510177	-21	kworker/u16:3+flush-8:0	23:29:16	5
228738	2	32	0,0	chrt	228739	-21	kthreadcore	20:14:24	7
90975	99	31	30,0	cyclictest	0	-21	swapper/7	00:28:48	7
90975	99	31	29,1	cyclictest	644117	-21	ssh	23:18:36	7
90975	99	31	29,1	cyclictest	606274	-21	ssh	23:01:05	7
90969	99	31	29,2	cyclictest	510177	-21	kworker/u16:3+flush-8:0	22:58:56	5
90969	99	31	29,2	cyclictest	3574114	-21	kworker/u16:5+events_unbound	20:24:25	5
90975	99	30	29,0	cyclictest	0	-21	swapper/7	23:37:36	7
90975	99	30	29,0	cyclictest	0	-21	swapper/7	22:58:35	7
90975	99	30	29,0	cyclictest	0	-21	swapper/7	22:43:16	7
90975	99	30	29,0	cyclictest	0	-21	swapper/7	21:49:45	7
90975	99	30	28,1	cyclictest	0	-21	swapper/7	21:58:21	7
90974	99	30	28,2	cyclictest	289051	-21	kworker/u16:3+events_unbound	20:49:20	6
90975	99	29	28,0	cyclictest	0	-21	swapper/7	20:13:56	7
90975	99	29	28,0	cyclictest	0	-21	swapper/7	00:10:28	7
90975	99	29	28,0	cyclictest	0	-21	swapper/7	00:04:40	7
90969	99	29	27,2	cyclictest	279339	-21	kworker/u16:1+flush-8:0	20:43:56	5
90975	99	28	26,1	cyclictest	328324	-21	diskmemload	22:35:56	7
90975	99	28	26,1	cyclictest	0	-21	swapper/7	22:45:56	7
90969	99	28	26,2	cyclictest	751182	-21	kworker/u16:3+flush-8:0	00:24:16	5
90969	99	28	26,2	cyclictest	656431	-21	kworker/u16:1+flush-8:0	23:43:56	5
90969	99	28	26,2	cyclictest	546838	-21	kworker/u16:0+flush-8:0	22:39:30	5
90969	99	28	25,2	cyclictest	581751	-21	kworker/u16:0+flush-8:0	23:19:06	5
90969	99	28	25,2	cyclictest	581751	-21	kworker/u16:0+flush-8:0	23:19:06	5
90975	99	27	26,0	cyclictest	0	-21	swapper/7	23:20:32	7
90975	99	27	26,0	cyclictest	0	-21	swapper/7	23:20:32	7
90975	99	27	26,0	cyclictest	0	-21	swapper/7	21:39:00	7
90975	99	27	26,0	cyclictest	0	-21	swapper/7	21:12:53	7
90975	99	27	25,1	cyclictest	800850	-21	ssh	00:21:44	7
90975	99	27	25,1	cyclictest	362905	-21	ssh	21:20:40	7
90975	99	27	21,5	cyclictest	318592	-21	latency_hist	21:04:02	7
90969	99	27	25,2	cyclictest	717213	-21	kworker/u16:3+events_unbound	23:49:19	5
90969	99	27	25,2	cyclictest	61298	-21	kworker/u16:0+events_unbound	19:29:22	5
90969	99	27	25,2	cyclictest	289051	-21	kworker/u16:3+events_unbound	22:04:15	5
90975	99	26	25,0	cyclictest	0	-21	swapper/7	23:30:36	7
90975	99	26	25,0	cyclictest	0	-21	swapper/7	23:10:32	7
90975	99	26	25,0	cyclictest	0	-21	swapper/7	22:21:56	7
90975	99	26	25,0	cyclictest	0	-21	swapper/7	21:31:00	7
90975	99	26	24,1	cyclictest	328324	-21	diskmemload	22:26:00	7
90975	99	26	21,3	cyclictest	704214	-21	ssh	23:42:33	7
90969	99	26	24,2	cyclictest	71695	-21	kworker/u16:2+events_unbound	19:34:15	5
90974	99	25	23,2	cyclictest	692660	-21	kworker/u16:2+events_unbound	00:14:28	6
90969	99	25	23,2	cyclictest	692660	-21	kworker/u16:2+flush-8:0	00:03:56	5
90969	99	25	23,2	cyclictest	692660	-21	kworker/u16:2+flush-8:0	00:03:56	5
90969	99	25	23,2	cyclictest	656431	-21	kworker/u16:1+flush-8:0	23:47:12	5
90969	99	25	23,2	cyclictest	559625	-21	kworker/u16:4+events_unbound	23:24:15	5
90969	99	25	23,2	cyclictest	389371	-21	kworker/u16:0+flush-8:0	22:29:27	5
90969	99	25	23,2	cyclictest	3574114	-21	kworker/u16:5+events_unbound	19:24:17	5
90969	99	25	23,2	cyclictest	279339	-21	kworker/u16:1+events_unbound	20:59:20	5
90975	99	24	23,0	cyclictest	0	-21	swapper/7	22:11:56	7
90975	99	24	23,0	cyclictest	0	-21	swapper/7	21:15:37	7
90975	99	24	22,1	cyclictest	706165	-21	ssh	23:44:17	7
90974	99	24	22,2	cyclictest	71695	-21	kworker/u16:2+flush-8:0	19:39:13	6
90974	99	24	21,3	cyclictest	3574114	-21	kworker/u16:5+flush-8:0	20:39:32	6
90969	99	24	22,2	cyclictest	3574114	-21	kworker/u16:5+events_unbound	19:09:30	5
90975	99	23	22,0	cyclictest	0	-21	swapper/7	22:18:25	7
90974	99	23	21,2	cyclictest	559625	-21	kworker/u16:4+flush-8:0	22:44:21	6
90974	99	23	21,2	cyclictest	253139	-21	kworker/u16:2+flush-8:0	20:38:56	6
90969	99	23	21,2	cyclictest	71695	-21	kworker/u16:2+events_unbound	19:49:30	5
90969	99	23	21,2	cyclictest	71695	-21	kworker/u16:2+events_unbound	19:49:30	5
90969	99	23	21,2	cyclictest	692660	-21	kworker/u16:2+flush-8:0	00:18:56	5
90969	99	23	21,2	cyclictest	692660	-21	kworker/u16:2+events_unbound	23:54:20	5
90969	99	23	21,2	cyclictest	692660	-21	kworker/u16:2+events_unbound	23:54:20	5
90969	99	23	21,2	cyclictest	289051	-21	kworker/u16:3+flush-8:0	22:14:01	5
90975	99	22	19,2	cyclictest	182467	-21	awk	19:54:01	7
90975	99	22	19,2	cyclictest	182467	-21	awk	19:54:01	7
90975	99	22	16,4	cyclictest	306352	-21	cut	20:54:24	7
90969	99	22	20,2	cyclictest	389371	-21	kworker/u16:0+events_unbound	22:25:04	5
90969	99	22	18,2	cyclictest	401569	-21	kworker/u16:1+events_unbound	21:59:33	5
90963	99	22	21,1	cyclictest	389371	-21	kworker/u16:0+events_unbound	22:08:11	4
90975	99	21	20,0	cyclictest	0	-21	swapper/7	22:02:29	7
90975	99	21	20,0	cyclictest	0	-21	swapper/7	00:29:56	7
90975	99	21	19,1	cyclictest	471748	-21	sh	22:04:37	7
90975	99	21	0,19	cyclictest	269504	-21	sed	20:34:30	7
90974	99	21	20,1	cyclictest	510177	-21	kworker/u16:3+events_unbound	22:58:07	6
90974	99	21	20,1	cyclictest	472524	-21	kworker/u16:2+events_unbound	22:06:14	6
90974	99	21	18,2	cyclictest	559625	-21	kworker/u16:4+events_unbound	23:04:28	6
90969	99	21	19,2	cyclictest	401569	-21	kworker/u16:1+flush-8:0	21:55:25	5
90969	99	21	19,2	cyclictest	289639	-21	kworker/u16:4+flush-8:0	21:46:32	5
90975	99	20	19,0	cyclictest	0	-21	swapper/7	21:48:29	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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