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 Jun 24, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
295879	2	98	0,1	sleep7	295880	-21	ssh	10:32:37	7
295879	2	98	0,1	sleep7	295880	-21	ssh	10:32:37	7
4041470	2	51	39,8	sleep4	0	-21	swapper/4	07:08:42	4
4041269	2	49	39,7	sleep5	0	-21	swapper/5	07:05:54	5
4041404	2	45	10,30	sleep7	0	-21	swapper/7	07:07:49	7
4041816	99	44	39,4	cyclictest	494555	-21	latency_hist	11:54:31	7
4041816	99	44	39,4	cyclictest	494555	-21	latency_hist	11:54:31	7
4041813	99	38	36,2	cyclictest	306878	-21	kworker/u16:4+flush-8:0	11:51:14	6
4041813	99	38	36,2	cyclictest	306878	-21	kworker/u16:4+flush-8:0	11:51:14	6
4041813	99	38	35,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	10:29:34	6
4041813	99	38	35,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	10:29:34	6
4041813	99	37	34,2	cyclictest	507396	-21	kworker/u16:0+flush-8:0	12:09:09	6
4041805	99	37	35,2	cyclictest	38679	-21	kworker/u16:3+events_unbound	09:45:26	4
4041813	99	36	34,2	cyclictest	507396	-21	kworker/u16:0+events_unbound	12:18:41	6
4041813	99	35	33,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	12:03:54	6
4041813	99	35	33,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	09:18:34	6
4041813	99	35	33,2	cyclictest	331716	-21	kworker/u16:5+flush-8:0	11:30:45	6
4041813	99	35	33,2	cyclictest	331716	-21	kworker/u16:5+events_unbound	11:39:05	6
4041813	99	35	33,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	10:58:14	6
4041805	99	35	33,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	12:32:45	4
4041805	99	35	33,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	12:32:45	4
4041805	99	35	33,2	cyclictest	173612	-21	kworker/u16:0+events_unbound	10:35:01	4
4041805	99	35	32,2	cyclictest	4093574	-21	kworker/u16:4+flush-8:0	07:39:47	4
4041816	99	34	28,5	cyclictest	650	-21	systemd-journal	11:09:31	7
4041816	99	34	0,32	cyclictest	358773	-21	latency_hist	10:59:32	7
4041813	99	34	32,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	12:12:40	6
4041813	99	34	32,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	11:56:05	6
4041813	99	34	32,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	10:40:49	6
4041813	99	34	32,2	cyclictest	173612	-21	kworker/u16:0+flush-8:0	10:34:57	6
4041813	99	34	32,2	cyclictest	148894	-21	kworker/u16:2+events_unbound	09:41:47	6
4041805	99	34	32,2	cyclictest	235064	-21	kworker/u16:3+events_unbound	10:15:57	4
4041805	99	34	32,2	cyclictest	173612	-21	kworker/u16:0+flush-8:0	10:22:29	4
4041805	99	34	32,2	cyclictest	148894	-21	kworker/u16:2+events_unbound	10:29:05	4
4041813	99	33	31,2	cyclictest	581103	-21	kworker/u16:3+events_unbound	12:36:05	6
4041813	99	33	31,2	cyclictest	55918	-21	kworker/u16:0+events_unbound	09:32:54	6
4041813	99	33	31,2	cyclictest	4191960	-21	kworker/u16:1+flush-8:0	12:23:50	6
4041813	99	33	31,2	cyclictest	4191960	-21	kworker/u16:1+flush-8:0	11:07:53	6
4041813	99	33	31,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	10:05:22	6
4041813	99	33	31,2	cyclictest	306878	-21	kworker/u16:4+flush-8:0	11:45:56	6
4041813	99	33	31,2	cyclictest	173612	-21	kworker/u16:0+events_unbound	10:12:38	6
4041805	99	33	31,2	cyclictest	507396	-21	kworker/u16:0+events_unbound	12:21:53	4
4041805	99	33	31,2	cyclictest	445379	-21	kworker/u16:2+events_unbound	11:57:09	4
4041805	99	33	31,2	cyclictest	4022170	-21	kworker/u16:3+events_unbound	07:29:33	4
4041403	2	33	23,7	sleep6	0	-21	swapper/6	07:07:48	6
4041813	99	32	30,2	cyclictest	55918	-21	kworker/u16:0+events_unbound	09:27:10	6
4041813	99	32	30,2	cyclictest	4191960	-21	kworker/u16:1+flush-8:0	11:12:50	6
4041813	99	32	30,2	cyclictest	4191960	-21	kworker/u16:1+flush-8:0	11:12:50	6
4041813	99	32	30,2	cyclictest	306878	-21	kworker/u16:4+flush-8:0	11:21:22	6
4041805	99	32	30,2	cyclictest	55918	-21	kworker/u16:0+events_unbound	09:25:58	4
4041805	99	32	30,2	cyclictest	55918	-21	kworker/u16:0+events_unbound	09:10:06	4
4041805	99	32	30,2	cyclictest	507396	-21	kworker/u16:0+events_unbound	12:38:29	4
4041805	99	32	30,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	11:29:17	4
4041805	99	32	30,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	11:02:01	4
4041805	99	32	30,2	cyclictest	173612	-21	kworker/u16:0+events_unbound	10:33:00	4
4041805	99	32	30,2	cyclictest	173612	-21	kworker/u16:0+events_unbound	10:33:00	4
4041813	99	31	29,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	11:42:10	6
4041813	99	31	29,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	10:48:30	6
4041813	99	31	29,2	cyclictest	331716	-21	kworker/u16:5+events_unbound	11:28:10	6
4041813	99	31	29,2	cyclictest	120331	-21	kworker/u16:6+events_unbound	09:21:26	6
4041813	99	31	28,2	cyclictest	507396	-21	kworker/u16:0+events_unbound	12:29:32	6
4041813	99	31	28,2	cyclictest	507396	-21	kworker/u16:0+events_unbound	12:29:32	6
4041805	99	31	29,2	cyclictest	55918	-21	kworker/u16:0+events_unbound	09:33:58	4
4041805	99	31	29,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	11:07:08	4
4041816	99	30	27,2	cyclictest	4083739	-21	ntpq	07:24:57	7
4041816	99	30	24,5	cyclictest	109219	-21	pool-gnome-soft	09:16:28	7
4041813	99	30	28,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	09:58:30	6
4041813	99	30	28,2	cyclictest	38679	-21	kworker/u16:3+flush-8:0	09:48:21	6
4041813	99	30	28,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	11:03:13	6
4041813	99	30	28,2	cyclictest	148894	-21	kworker/u16:2+events_unbound	10:26:58	6
4041813	99	30	28,2	cyclictest	148894	-21	kworker/u16:2+events_unbound	10:17:57	6
4041805	99	30	28,2	cyclictest	331716	-21	kworker/u16:5+flush-8:0	10:54:04	4
4041805	99	30	28,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	11:44:08	4
4041816	99	29	23,5	cyclictest	198028	-21	latency_hist	09:54:31	7
4041813	99	29	27,2	cyclictest	55918	-21	kworker/u16:0+events_unbound	09:13:10	6
4041813	99	29	27,2	cyclictest	306878	-21	kworker/u16:4+flush-8:0	10:51:30	6
4041813	99	29	27,2	cyclictest	148894	-21	kworker/u16:2+flush-8:0	09:51:05	6
4041813	99	29	27,2	cyclictest	148894	-21	kworker/u16:2+events_unbound	10:19:44	6
4041813	99	29	26,2	cyclictest	4113936	-21	kworker/u16:2+flush-8:0	07:44:42	6
4041805	99	29	27,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	10:01:26	4
4041805	99	29	27,2	cyclictest	38679	-21	kworker/u16:3+events_unbound	09:56:11	4
4041805	99	29	27,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	10:45:48	4
4041813	99	28	26,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	12:28:33	6
4041813	99	28	26,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	10:02:09	6
4041813	99	28	26,2	cyclictest	4152621	-21	kworker/u16:1+flush-8:0	08:08:41	6
4041805	99	28	26,2	cyclictest	4191960	-21	kworker/u16:1+flush-8:0	09:44:16	4
4041805	99	28	26,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	12:15:24	4
4041805	99	28	26,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	11:13:15	4
4041805	99	28	26,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	11:13:15	4
4041805	99	28	26,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	10:55:55	4
4041805	99	28	26,2	cyclictest	4191960	-21	kworker/u16:1+events_unbound	09:51:53	4
4041805	99	28	26,2	cyclictest	331716	-21	kworker/u16:5+flush-8:0	11:32:58	4
4041805	99	28	26,2	cyclictest	331716	-21	kworker/u16:5+events_unbound	11:35:51	4
4041805	99	28	26,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	11:52:51	4
4041805	99	28	26,2	cyclictest	306878	-21	kworker/u16:4+events_unbound	11:52:51	4
4041813	99	27	25,2	cyclictest	4011588	-21	kworker/u16:2+flush-8:0	07:24:53	6
4041805	99	27	25,2	cyclictest	38679	-21	kworker/u16:3+events_unbound	09:18:24	4
4041805	99	27	25,2	cyclictest	331716	-21	kworker/u16:5+events_unbound	11:17:39	4
4041805	99	27	25,2	cyclictest	120331	-21	kworker/u16:6+events_unbound	09:20:35	4
4041816	99	26	25,0	cyclictest	0	-21	swapper/7	11:14:17	7
4041816	99	26	25,0	cyclictest	0	-21	swapper/7	11:14:17	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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