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 Tue Apr 14, 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
3397144	2	50	26,8	sleep4	0	-21	swapper/4	07:01:18	4
3397463	99	49	46,2	cyclictest	3824628	-21	kworker/u16:2+flush-8:0	10:51:47	5
3397460	99	48	45,2	cyclictest	3678467	-21	fwupd	09:23:50	4
3397023	2	48	13,30	sleep7	0	-21	swapper/7	06:59:37	7
3738857	2	46	0,1	sleep7	3738858	-21	ssh	09:45:23	7
3397463	99	46	44,2	cyclictest	3752064	-21	kworker/u16:1+flush-8:0	11:41:47	5
3396917	2	45	34,7	sleep5	0	-21	swapper/5	06:58:06	5
3397468	99	42	41,1	cyclictest	3573505	-21	kworker/u16:1+events_unbound	09:23:48	6
3397176	2	42	32,7	sleep6	0	-21	swapper/6	07:01:44	6
3397476	99	41	40,0	cyclictest	0	-21	swapper/7	12:22:15	7
3397463	99	41	38,2	cyclictest	3738862	-21	kworker/u16:0+flush-8:0	10:26:47	5
3397468	99	39	37,2	cyclictest	3496510	-21	kworker/u16:0+flush-8:0	08:26:47	6
3397468	99	38	36,2	cyclictest	4003041	-21	kworker/u16:0+events_unbound	11:46:16	6
3397468	99	38	36,2	cyclictest	3678520	-21	kworker/u16:5+events_unbound	09:30:11	6
3397463	99	38	34,3	cyclictest	3678467	-21	fwupd	09:21:19	5
3397476	99	37	34,2	cyclictest	3881439	-21	ssh	10:42:10	7
3397476	99	36	0,34	cyclictest	6471	-21	gnome-software	09:21:21	7
3397468	99	36	34,2	cyclictest	4075255	-21	kworker/u16:1+events_unbound	12:03:08	6
3397468	99	36	34,2	cyclictest	4003041	-21	kworker/u16:0+events_unbound	12:24:24	6
3397468	99	36	34,2	cyclictest	3942535	-21	kworker/u16:5+events_unbound	11:40:16	6
3397463	99	36	34,2	cyclictest	3824628	-21	kworker/u16:2+flush-8:0	10:31:47	5
3397460	99	36	33,2	cyclictest	4003041	-21	kworker/u16:0+flush-8:0	12:26:53	4
3397468	99	35	33,2	cyclictest	3824628	-21	kworker/u16:2+events_unbound	10:34:01	6
3397460	99	35	32,2	cyclictest	3630433	-21	kworker/u16:0+events_unbound	09:12:02	4
3397463	99	34	32,2	cyclictest	3738862	-21	kworker/u16:0+flush-8:0	10:13:18	5
3397468	99	33	31,2	cyclictest	4054570	-21	kworker/u16:3+events_unbound	12:01:32	6
3397468	99	33	31,2	cyclictest	4054570	-21	kworker/u16:3+events_unbound	12:01:32	6
3397468	99	33	31,2	cyclictest	3942535	-21	kworker/u16:5+events_unbound	11:11:32	6
3397468	99	33	31,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	09:56:20	6
3397468	99	33	31,2	cyclictest	3738862	-21	kworker/u16:0+events_unbound	10:27:44	6
3397468	99	33	31,2	cyclictest	3738862	-21	kworker/u16:0+events_unbound	10:06:41	6
3397468	99	33	31,2	cyclictest	3738862	-21	kworker/u16:0+events_unbound	10:00:20	6
3397468	99	33	31,2	cyclictest	3630433	-21	kworker/u16:0+events_unbound	09:20:11	6
3397468	99	33	31,2	cyclictest	3573505	-21	kworker/u16:1+events_unbound	09:10:11	6
3397460	99	33	32,1	cyclictest	3752064	-21	kworker/u16:1+events_unbound	11:24:38	4
3397460	99	33	31,2	cyclictest	3752064	-21	kworker/u16:1+flush-8:0	09:56:47	4
3397468	99	32	30,2	cyclictest	4101708	-21	kworker/u16:2+events_unbound	12:21:16	6
3397468	99	32	30,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	11:25:07	6
3397468	99	32	30,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	11:21:40	6
3397468	99	32	30,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	11:01:11	6
3397463	99	32	30,2	cyclictest	3325181	-21	kworker/u16:1+flush-8:0	07:11:47	5
3397463	99	32	29,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	10:02:00	5
3397476	99	31	13,17	cyclictest	6471	-21	gnome-software	09:27:00	7
3397468	99	31	29,2	cyclictest	4003041	-21	kworker/u16:0+events_unbound	12:09:27	6
3397468	99	31	29,2	cyclictest	3824628	-21	kworker/u16:2+events_unbound	10:50:59	6
3397468	99	31	29,2	cyclictest	3738862	-21	kworker/u16:0+events_unbound	10:20:12	6
3397468	99	31	29,2	cyclictest	3630433	-21	kworker/u16:0+events_unbound	09:16:20	6
3397468	99	31	29,2	cyclictest	3573505	-21	kworker/u16:1+events_unbound	08:33:05	6
3397468	99	31	29,2	cyclictest	3458605	-21	kworker/u16:4+events_unbound	09:36:12	6
3397468	99	31	29,2	cyclictest	3458605	-21	kworker/u16:4+events_unbound	09:01:25	6
3397468	99	30	28,2	cyclictest	4003041	-21	kworker/u16:0+events_unbound	11:48:19	6
3397468	99	30	28,2	cyclictest	3942535	-21	kworker/u16:5+events_unbound	12:14:55	6
3397468	99	30	28,2	cyclictest	3942535	-21	kworker/u16:5+events_unbound	11:54:32	6
3397468	99	30	28,2	cyclictest	3897979	-21	kworker/u16:0+events_unbound	10:55:39	6
3397468	99	30	28,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	10:45:27	6
3397468	99	30	28,2	cyclictest	3678344	-21	kworker/u16:2+events_unbound	09:37:44	6
3397468	99	30	27,2	cyclictest	3969306	-21	kworker/u16:2+events_unbound	11:34:32	6
3397463	99	30	28,2	cyclictest	3824628	-21	kworker/u16:2+flush-8:0	10:46:42	5
3397463	99	30	26,3	cyclictest	2671560	-21	kworker/u16:3+events_unbound	08:47:09	5
3397460	99	30	28,2	cyclictest	4003041	-21	kworker/u16:0+flush-8:0	12:02:04	4
3397468	99	29	27,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	10:41:03	6
3397468	99	29	27,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	10:41:03	6
3397468	99	29	27,2	cyclictest	3738862	-21	kworker/u16:0+events_unbound	10:14:23	6
3397468	99	29	27,2	cyclictest	3458605	-21	kworker/u16:4+events_unbound	07:36:44	6
3397468	99	29	27,2	cyclictest	2671560	-21	kworker/u16:3+events_unbound	07:07:15	6
3397463	99	29	27,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	11:27:18	5
3397476	99	28	27,0	cyclictest	0	-21	swapper/7	07:32:02	7
3397468	99	28	26,2	cyclictest	3942535	-21	kworker/u16:5+events_unbound	11:16:39	6
3397468	99	28	26,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	11:05:35	6
3397468	99	28	26,2	cyclictest	3678344	-21	kworker/u16:2+events_unbound	09:45:39	6
3397468	99	28	26,2	cyclictest	3573505	-21	kworker/u16:1+events_unbound	09:06:20	6
3397468	99	28	26,2	cyclictest	3458605	-21	kworker/u16:4+events_unbound	08:18:31	6
3397468	99	28	26,2	cyclictest	3458605	-21	kworker/u16:4+events_unbound	08:15:27	6
3397463	99	28	26,2	cyclictest	3897979	-21	kworker/u16:0+flush-8:0	11:12:18	5
3397463	99	28	25,2	cyclictest	2671560	-21	kworker/u16:3+flush-8:0	08:46:47	5
3397463	99	28	25,2	cyclictest	2671560	-21	kworker/u16:3+flush-8:0	08:46:47	5
3690996	2	27	0,1	chrt	3690997	-21	ssh	09:26:31	7
3397468	99	27	25,2	cyclictest	3458605	-21	kworker/u16:4+events_unbound	08:28:10	6
3397468	99	27	25,2	cyclictest	3458605	-21	kworker/u16:4+events_unbound	07:56:46	6
3397468	99	27	25,2	cyclictest	3428826	-21	kworker/u16:2+events_unbound	07:31:45	6
3397468	99	27	25,2	cyclictest	3387444	-21	kworker/u16:2+events_unbound	07:04:23	6
3397468	99	27	24,2	cyclictest	4075255	-21	kworker/u16:1+events_unbound	12:26:55	6
3397468	99	26	24,2	cyclictest	3942535	-21	kworker/u16:5+events_unbound	11:30:59	6
3397468	99	26	24,2	cyclictest	3678344	-21	kworker/u16:2+flush-8:0	09:47:27	6
3397468	99	26	24,2	cyclictest	3325181	-21	kworker/u16:1+events_unbound	07:20:19	6
3397468	99	26	24,2	cyclictest	2671560	-21	kworker/u16:3+events_unbound	08:38:02	6
3397468	99	26	24,2	cyclictest	2671560	-21	kworker/u16:3+events_unbound	07:51:10	6
3397468	99	26	24,2	cyclictest	2671560	-21	kworker/u16:3+events_unbound	07:38:35	6
3397468	99	26	23,2	cyclictest	2671560	-21	kworker/u16:3+events_unbound	08:46:49	6
3397463	99	26	24,2	cyclictest	3738862	-21	kworker/u16:0+flush-8:0	10:37:16	5
3397463	99	26	24,2	cyclictest	3738862	-21	kworker/u16:0+flush-8:0	10:37:16	5
3397463	99	26	24,2	cyclictest	3496510	-21	kworker/u16:0+flush-8:0	08:06:47	5
3397460	99	26	24,2	cyclictest	4101708	-21	kworker/u16:2+flush-8:0	12:22:12	4
3397460	99	26	23,2	cyclictest	3458605	-21	kworker/u16:4+events_unbound	09:26:55	4
3397476	99	25	0,24	cyclictest	4018758	-21	sh	11:42:02	7
3397468	99	25	23,2	cyclictest	3752064	-21	kworker/u16:1+events_unbound	10:10:24	6
3397468	99	25	23,2	cyclictest	3496510	-21	kworker/u16:0+events_unbound	08:01:11	6
3397468	99	25	23,2	cyclictest	3496510	-21	kworker/u16:0+events_unbound	08:01:11	6
3397468	99	25	23,2	cyclictest	3458605	-21	kworker/u16:4+events_unbound	08:08:10	6
3397468	99	25	23,2	cyclictest	2671560	-21	kworker/u16:3+events_unbound	07:42:34	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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