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 Fri Jun 19, 2026 00:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
168256	2	58	48,7	sleep4	0	-21	swapper/4	19:06:47	4
168383	2	45	10,30	sleep7	0	-21	swapper/7	19:08:34	7
168239	2	43	33,7	sleep5	0	-21	swapper/5	19:06:32	5
168326	2	39	29,7	sleep6	0	-21	swapper/6	19:07:45	6
168746	99	38	36,2	cyclictest	467460	-21	kworker/u16:3+flush-8:0	23:09:48	5
168743	99	36	34,2	cyclictest	858640	-21	kworker/u16:2+events_unbound	00:15:08	4
168752	99	34	31,2	cyclictest	723895	-21	ssh	23:19:48	7
168746	99	34	32,2	cyclictest	3494724	-21	kworker/u16:0+events_unbound	19:15:09	5
168752	99	32	30,1	cyclictest	0	-21	swapper/7	00:20:09	7
168748	99	32	30,2	cyclictest	467460	-21	kworker/u16:3+events_unbound	22:05:07	6
168743	99	32	30,2	cyclictest	797524	-21	kworker/u16:1+flush-8:0	00:09:48	4
168752	99	31	30,0	cyclictest	0	-21	swapper/7	19:35:09	7
168743	99	31	28,2	cyclictest	465138	-21	kworker/u16:2+events_unbound	21:40:17	4
709472	2	30	0,0	sleep4	65	-21	ksoftirqd/4	23:10:45	4
168746	99	30	28,2	cyclictest	467460	-21	kworker/u16:3+flush-8:0	22:04:49	5
168746	99	30	28,2	cyclictest	467460	-21	kworker/u16:3+flush-8:0	22:04:49	5
168743	99	30	27,2	cyclictest	338494	-21	kworker/u16:3+flush-8:0	21:19:48	4
642969	2	28	0,1	chrt	0	-21	swapper/4	22:45:13	4
168752	99	28	27,0	cyclictest	0	-21	swapper/7	22:10:20	7
168743	99	28	26,2	cyclictest	868306	-21	kworker/u16:3+events_unbound	00:30:21	4
168743	99	28	26,2	cyclictest	467460	-21	kworker/u16:3+flush-8:0	22:05:19	4
168752	99	27	25,1	cyclictest	468744	-21	ssh	21:35:09	7
168743	99	27	24,2	cyclictest	338494	-21	kworker/u16:3+flush-8:0	21:10:16	4
168752	99	26	22,3	cyclictest	884485	-21	irqcore	00:25:11	7
168746	99	26	23,3	cyclictest	467460	-21	kworker/u16:3+events_unbound	21:55:22	5
168746	99	26	23,3	cyclictest	467460	-21	kworker/u16:3+events_unbound	21:55:22	5
168752	99	25	23,1	cyclictest	0	-21	swapper/7	19:10:14	7
168752	99	25	22,2	cyclictest	919549	-21	ssh	00:39:48	7
168752	99	24	23,0	cyclictest	0	-21	swapper/7	22:00:17	7
168752	99	24	23,0	cyclictest	0	-21	swapper/7	22:00:17	7
168746	99	24	22,2	cyclictest	465138	-21	kworker/u16:2+flush-8:0	22:15:17	5
168746	99	24	20,3	cyclictest	882951	-21	latency_hist	00:24:53	5
168743	99	24	22,2	cyclictest	3661377	-21	kworker/u16:2+events_unbound	19:20:16	4
168752	99	23	22,0	cyclictest	0	-21	swapper/7	20:55:17	7
168748	99	23	21,2	cyclictest	348513	-21	kworker/u16:4+events_unbound	21:30:12	6
168743	99	23	21,2	cyclictest	406649	-21	kworker/u16:0+events_unbound	21:25:22	4
168743	99	23	20,2	cyclictest	773116	-21	kworker/u16:3+events_unbound	23:40:05	4
168752	99	22	21,0	cyclictest	0	-21	swapper/7	21:10:08	7
168748	99	22	20,2	cyclictest	279821	-21	kworker/u16:2+events_unbound	20:10:08	6
168746	99	22	21,1	cyclictest	588130	-21	kworker/u16:2+events_unbound	22:25:01	5
168743	99	22	20,2	cyclictest	588130	-21	kworker/u16:2+events_unbound	22:25:53	4
168743	99	22	20,2	cyclictest	443412	-21	kworker/u16:1+events_unbound	21:45:07	4
168752	99	21	19,1	cyclictest	0	-21	swapper/7	23:39:54	7
168748	99	21	18,2	cyclictest	868306	-21	kworker/u16:3+flush-8:0	00:29:59	6
168746	99	21	19,2	cyclictest	443412	-21	kworker/u16:1+events_unbound	21:35:22	5
168746	99	21	19,2	cyclictest	178562	-21	kworker/u16:4+flush-8:0	19:35:17	5
168743	99	21	20,1	cyclictest	907532	-21	kworker/u16:0+events_unbound	00:38:25	4
168748	99	20	18,2	cyclictest	699874	-21	kworker/u16:0+flush-8:0	23:39:48	6
168748	99	20	17,2	cyclictest	178562	-21	kworker/u16:4+flush-8:0	19:40:20	6
168746	99	20	18,2	cyclictest	3494724	-21	kworker/u16:0+flush-8:0	20:55:23	5
168746	99	20	18,2	cyclictest	3494724	-21	kworker/u16:0+events_unbound	20:05:17	5
168746	99	20	18,2	cyclictest	279821	-21	kworker/u16:2+flush-8:0	20:10:19	5
168746	99	20	18,2	cyclictest	178562	-21	kworker/u16:4+flush-8:0	19:30:22	5
168746	99	20	17,2	cyclictest	465138	-21	kworker/u16:2+flush-8:0	21:50:03	5
168743	99	20	19,1	cyclictest	465138	-21	kworker/u16:2+events_unbound	21:53:00	4
168743	99	20	18,2	cyclictest	338494	-21	kworker/u16:3+events_unbound	21:20:21	4
168743	99	20	17,2	cyclictest	3494724	-21	kworker/u16:0+flush-8:0	19:55:16	4
168752	99	19	17,1	cyclictest	699496	-21	turbostat	23:09:53	7
168748	99	19	17,2	cyclictest	467460	-21	kworker/u16:3+flush-8:0	23:10:24	6
168748	99	19	15,3	cyclictest	269997	-21	awk	19:59:54	6
168746	99	19	17,2	cyclictest	406649	-21	kworker/u16:0+flush-8:0	21:14:19	5
168743	99	19	17,2	cyclictest	178562	-21	kworker/u16:4+flush-8:0	19:25:20	4
168752	99	18	17,0	cyclictest	0	-21	swapper/7	20:30:16	7
168752	99	18	16,1	cyclictest	858857	-21	ssh	00:14:56	7
168752	99	18	13,3	cyclictest	1278	-21	snmpd	20:10:16	7
168752	99	18	0,17	cyclictest	501576	-21	sh	21:45:23	7
168748	99	18	16,2	cyclictest	858640	-21	kworker/u16:2+events_unbound	00:15:24	6
168748	99	18	16,2	cyclictest	672680	-21	kworker/u16:1+flush-8:0	22:59:49	6
168748	99	18	16,2	cyclictest	465138	-21	kworker/u16:2+flush-8:0	22:15:25	6
168748	99	18	13,4	cyclictest	613934	-21	latency_hist	22:34:54	6
168743	99	18	16,2	cyclictest	338494	-21	kworker/u16:3+events_unbound	20:55:26	4
168743	99	18	16,2	cyclictest	279821	-21	kworker/u16:2+events_unbound	20:25:19	4
168743	99	18	15,2	cyclictest	760892	-21	kworker/u16:2+events_unbound	23:49:55	4
168752	99	17	16,0	cyclictest	0	-21	swapper/7	21:55:23	7
168752	99	17	16,0	cyclictest	0	-21	swapper/7	21:55:23	7
168752	99	17	15,1	cyclictest	0	-21	swapper/7	20:54:53	7
168752	99	17	0,4	cyclictest	439803	-21	sh	21:20:17	7
168748	99	17	15,2	cyclictest	443412	-21	kworker/u16:1+flush-8:0	21:45:21	6
168748	99	17	15,2	cyclictest	338494	-21	kworker/u16:3+flush-8:0	20:55:24	6
168752	99	16	15,0	cyclictest	0	-21	swapper/7	21:16:05	7
168752	99	16	15,0	cyclictest	0	-21	swapper/7	20:15:21	7
168752	99	16	14,1	cyclictest	0	-21	swapper/7	22:05:12	7
168752	99	16	13,2	cyclictest	5934	-21	gnome-shell	22:24:03	7
168752	99	16	0,14	cyclictest	802958	-21	kthreadcore	23:50:15	7
168752	99	16	0,14	cyclictest	0	-21	swapper/7	19:55:16	7
168748	99	16	12,3	cyclictest	723952	-21	awk	23:19:53	6
168746	99	16	13,2	cyclictest	868306	-21	kworker/u16:3+events_unbound	00:25:06	5
168743	99	16	14,2	cyclictest	467460	-21	kworker/u16:3+events_unbound	22:35:28	4
168743	99	16	13,2	cyclictest	348513	-21	kworker/u16:4+flush-8:0	21:04:53	4
168752	99	15	13,1	cyclictest	0	-21	swapper/7	21:32:22	7
168752	99	15	0,1	cyclictest	0	-21	swapper/7	22:56:47	7
168752	99	15	0,1	cyclictest	0	-21	swapper/7	00:07:44	7
168752	99	15	0,14	cyclictest	0	-21	swapper/7	22:15:18	7
168748	99	15	13,2	cyclictest	406649	-21	kworker/u16:0+events_unbound	21:15:11	6
168748	99	15	13,2	cyclictest	3494724	-21	kworker/u16:0+events_unbound	19:10:08	6
168748	99	15	13,2	cyclictest	348513	-21	kworker/u16:4+events_unbound	21:10:00	6
168748	99	15	13,2	cyclictest	231221	-21	kworker/u16:1+flush-8:0	20:00:24	6
168748	99	15	0,15	cyclictest	0	-21	swapper/6	23:45:55	6
168746	99	15	13,2	cyclictest	822165	-21	kworker/u16:4+flush-8:0	00:30:24	5
168746	99	15	13,2	cyclictest	465138	-21	kworker/u16:2+flush-8:0	21:45:24	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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