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 Sun Jun 21, 2026 12:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2830700	2	94	0,1	sleep5	0	-21	swapper/5	08:30:00	5
2669281	2	55	19,31	sleep7	0	-21	swapper/7	07:07:59	7
2660133	2	54	43,7	sleep4	0	-21	swapper/4	07:04:51	4
2669279	2	44	34,7	sleep5	0	-21	swapper/5	07:07:57	5
2669691	99	39	37,1	cyclictest	0	-21	swapper/7	10:10:06	7
2669691	99	36	32,3	cyclictest	2678941	-21	vmstat	07:10:15	7
2669685	99	30	25,4	cyclictest	3105006	-21	latency_hist	10:29:43	5
2660946	2	30	10,16	sleep6	0	-21	swapper/6	07:05:01	6
2669691	99	29	28,0	cyclictest	0	-21	swapper/7	11:25:33	7
2669691	99	29	28,0	cyclictest	0	-21	swapper/7	09:19:22	7
2669691	99	27	26,0	cyclictest	0	-21	swapper/7	10:05:06	7
2669691	99	27	26,0	cyclictest	0	-21	swapper/7	07:25:02	7
3176325	2	25	0,1	chrt	0	-21	swapper/4	10:55:12	4
3176325	2	25	0,1	chrt	0	-21	swapper/4	10:55:12	4
2669685	99	25	23,2	cyclictest	3179464	-21	kworker/u16:1+events_unbound	11:14:50	5
2669685	99	25	23,2	cyclictest	3130078	-21	kworker/u16:5+events_unbound	10:54:54	5
2669685	99	25	23,2	cyclictest	3130078	-21	kworker/u16:5+events_unbound	10:54:54	5
2669682	99	25	24,1	cyclictest	3179464	-21	kworker/u16:1+events_unbound	11:10:02	4
2669682	99	25	20,4	cyclictest	3315376	-21	awk	11:54:43	4
2669691	99	24	22,1	cyclictest	3337537	-21	ssh	12:00:22	7
2669691	99	24	22,1	cyclictest	0	-21	swapper/7	09:54:53	7
2669685	99	24	22,2	cyclictest	2820575	-21	kworker/u16:2+events_unbound	09:33:18	5
2669682	99	24	23,1	cyclictest	3179464	-21	kworker/u16:1+events_unbound	11:18:25	4
2669691	99	23	22,0	cyclictest	0	-21	swapper/7	09:50:22	7
2669691	99	23	20,2	cyclictest	3215801	-21	ssh	11:13:53	7
2669685	99	23	21,2	cyclictest	3277159	-21	kworker/u16:1+events_unbound	11:54:38	5
2669685	99	23	21,2	cyclictest	2800031	-21	kworker/u16:0+events_unbound	08:20:42	5
2669685	99	23	21,2	cyclictest	2789262	-21	kworker/u16:3+events_unbound	08:17:46	5
2669691	99	22	21,0	cyclictest	0	-21	swapper/7	08:29:57	7
2669691	99	22	21,0	cyclictest	0	-21	swapper/7	07:55:08	7
2669685	99	22	20,2	cyclictest	3253778	-21	kworker/u16:2+flush-8:0	12:00:01	5
2669685	99	22	20,2	cyclictest	2867202	-21	kworker/u16:0+flush-8:0	09:00:58	5
2669685	99	22	20,2	cyclictest	2842910	-21	kworker/u16:1+events_unbound	08:51:42	5
2669685	99	22	20,2	cyclictest	2711574	-21	kworker/u16:1+events_unbound	07:38:57	5
2669691	99	21	20,0	cyclictest	0	-21	swapper/7	08:05:03	7
2669691	99	21	18,2	cyclictest	3154470	-21	ssh	10:49:43	7
2669691	99	21	17,3	cyclictest	3352837	-21	sh	12:09:53	7
2669691	99	21	0,19	cyclictest	6794	-21	sshd	09:10:30	7
2669685	99	21	19,2	cyclictest	3055866	-21	kworker/u16:1+events_unbound	10:14:54	5
2669685	99	21	19,2	cyclictest	2867202	-21	kworker/u16:0+events_unbound	09:06:43	5
2669685	99	21	19,2	cyclictest	2659875	-21	kworker/u16:3+events_unbound	07:12:06	5
2669691	99	20	19,0	cyclictest	0	-21	swapper/7	11:30:26	7
2669691	99	20	19,0	cyclictest	0	-21	swapper/7	08:29:43	7
2669691	99	20	19,0	cyclictest	0	-21	swapper/7	08:20:09	7
2669691	99	20	18,1	cyclictest	0	-21	swapper/7	10:40:53	7
2669691	99	20	0,19	cyclictest	3375262	-21	ssh	12:16:33	7
2669691	99	20	0,18	cyclictest	3165589	-21	ssh	10:52:33	7
2669685	99	20	18,2	cyclictest	3303224	-21	kworker/u16:0+events_unbound	11:55:11	5
2669685	99	20	18,2	cyclictest	3130078	-21	kworker/u16:5+events_unbound	10:49:51	5
2669685	99	20	18,2	cyclictest	3117722	-21	kworker/u16:4+flush-8:0	11:00:09	5
2669685	99	20	18,2	cyclictest	2842910	-21	kworker/u16:1+events_unbound	08:55:49	5
2669685	99	20	18,2	cyclictest	2722253	-21	kworker/u16:4+events_unbound	08:03:01	5
2669685	99	20	18,2	cyclictest	2711574	-21	kworker/u16:1+flush-8:0	08:08:59	5
2669685	99	20	18,2	cyclictest	2693061	-21	kworker/u16:2+events_unbound	07:25:26	5
2669691	99	19	18,0	cyclictest	0	-21	swapper/7	12:25:08	7
2669691	99	19	18,0	cyclictest	0	-21	swapper/7	11:19:54	7
2669691	99	19	18,0	cyclictest	0	-21	swapper/7	09:40:05	7
2669691	99	19	16,2	cyclictest	3117400	-21	ssh	10:34:43	7
2669685	99	19	17,2	cyclictest	2887442	-21	kworker/u16:3+flush-8:0	09:10:31	5
2669685	99	19	17,2	cyclictest	2842910	-21	kworker/u16:1+events_unbound	08:43:18	5
2669685	99	19	17,2	cyclictest	2722253	-21	kworker/u16:4+events_unbound	07:53:20	5
2669685	99	19	17,2	cyclictest	2711574	-21	kworker/u16:1+events_unbound	07:45:49	5
2669685	99	19	17,2	cyclictest	2659875	-21	kworker/u16:3+events_unbound	07:32:57	5
2669691	99	18	17,0	cyclictest	0	-21	swapper/7	07:30:07	7
2669691	99	18	0,17	cyclictest	5934	-21	gnome-shell	10:37:53	7
2669685	99	18	16,2	cyclictest	3117722	-21	kworker/u16:4+flush-8:0	11:10:09	5
2669685	99	18	16,2	cyclictest	2800031	-21	kworker/u16:0+events_unbound	08:26:36	5
2669685	99	18	16,2	cyclictest	2722253	-21	kworker/u16:4+events_unbound	08:12:20	5
2669685	99	18	16,2	cyclictest	2693061	-21	kworker/u16:2+events_unbound	07:41:49	5
2669685	99	18	16,2	cyclictest	2640817	-21	kworker/u16:0+events_unbound	07:17:01	5
2669682	99	18	14,3	cyclictest	3003524	-21	kworker/u16:0+flush-8:0	09:50:42	4
2669691	99	17	16,0	cyclictest	0	-21	swapper/7	10:01:21	7
2669691	99	17	15,1	cyclictest	3315356	-21	turbostat	11:54:43	7
2669691	99	17	15,1	cyclictest	2906867	-21	diskmemload	12:36:09	7
2669691	99	17	15,1	cyclictest	0	-21	swapper/7	11:46:02	7
2669691	99	17	15,1	cyclictest	0	-21	swapper/7	07:35:02	7
2669691	99	17	14,2	cyclictest	911	-21	dbus-daemon	12:24:43	7
2669685	99	17	15,2	cyclictest	3253778	-21	kworker/u16:2+flush-8:0	12:20:18	5
2669685	99	17	15,2	cyclictest	2722253	-21	kworker/u16:4+events_unbound	07:54:48	5
2669685	99	17	15,2	cyclictest	2659875	-21	kworker/u16:3+events_unbound	07:21:56	5
2669682	99	17	15,2	cyclictest	3055866	-21	kworker/u16:1+flush-8:0	10:15:22	4
2669682	99	17	0,16	cyclictest	0	-21	swapper/4	09:24:55	4
2669691	99	16	15,0	cyclictest	0	-21	swapper/7	11:35:38	7
2669691	99	16	14,1	cyclictest	3412777	-21	ssh	12:32:25	7
2669691	99	16	0,14	cyclictest	3191471	-21	sshd-session	11:04:34	7
2669687	99	16	15,1	cyclictest	0	-21	swapper/6	11:43:23	6
2669687	99	16	0,2	cyclictest	2935386	-21	cut	09:20:00	6
2669687	99	16	0,15	cyclictest	3105497	-21	/usr/sbin/munin	10:30:00	6
2669685	99	16	14,2	cyclictest	3227027	-21	kworker/u16:3+events_unbound	11:39:50	5
2669685	99	16	14,2	cyclictest	3093101	-21	kworker/u16:0+events_unbound	10:30:43	5
2669685	99	16	14,2	cyclictest	2842910	-21	kworker/u16:1+events_unbound	08:44:50	5
2669685	99	16	14,2	cyclictest	2842910	-21	kworker/u16:1+events_unbound	08:44:50	5
2669685	99	16	14,2	cyclictest	2789262	-21	kworker/u16:3+events_unbound	08:35:57	5
2669685	99	16	12,2	cyclictest	2820575	-21	kworker/u16:2+events_unbound	09:40:30	5
2669682	99	16	0,1	cyclictest	0	-21	swapper/4	11:55:05	4
2669691	99	15	14,0	cyclictest	0	-21	swapper/7	10:58:50	7
2669691	99	15	14,0	cyclictest	0	-21	swapper/7	10:58:50	7
2669691	99	15	14,0	cyclictest	0	-21	swapper/7	09:19:55	7
2669691	99	15	13,1	cyclictest	3226973	-21	ssh	11:16:41	7
2669687	99	15	12,2	cyclictest	3217094	-21	expr	11:14:56	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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