OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #b, slot #1

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

Characteristics of the 100 highest latencies:

System rackbslot1.osadl.org (updated Tue Dec 30, 2025 12:44:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2650053	2	195	171,14	sleep3	0	-21	swapper/3	07:09:21	3
2649963	2	188	152,26	sleep0	0	-21	swapper/0	07:08:14	0
2650010	2	184	161,13	sleep2	0	-21	swapper/2	07:08:52	2
2650051	2	183	159,14	sleep1	0	-21	swapper/1	07:09:19	1
2650323	99	100	9,16	cyclictest	2873673	-21	ChromeDriver	00:55:19	0
2650328	99	92	85,6	cyclictest	2780332	-21	munin-limits	09:10:35	1
2650328	99	92	85,6	cyclictest	2780332	-21	munin-limits	09:10:35	1
2650328	99	87	4,80	cyclictest	2873916	-21	BatteryStatusNo	10:45:03	1
2650328	99	73	9,63	cyclictest	2945271	-21	kworker/u8:1+efi_rts_wq	12:14:58	1
2650323	99	70	64,4	cyclictest	2987263	-21	/usr/share/muni	12:35:12	0
2650328	99	65	54,9	cyclictest	2842204	-21	kworker/u8:2+flush-179:0	10:25:29	1
2650330	99	64	58,5	cyclictest	2966211	-21	cp	12:15:00	2
2650323	99	64	60,3	cyclictest	2965688	-21	kworker/u8:3+flush-179:0	12:30:12	0
2650323	99	61	57,3	cyclictest	2649777	-21	kworker/u8:4+flush-179:0	07:15:00	0
2650323	99	61	55,5	cyclictest	2775920	-21	latency_hist	09:10:01	0
2650333	99	60	56,3	cyclictest	2671664	-21	kworker/u8:1+flush-179:0	07:40:30	3
2650328	99	60	49,10	cyclictest	2814151	-21	kworker/u8:1+flush-179:0	10:15:26	1
2650323	99	58	3,54	cyclictest	2945271	-21	kworker/u8:1+efi_rts_wq	12:15:01	0
2650323	99	57	42,14	cyclictest	2791670	-21	kworker/u8:2+events_unbound	09:25:23	0
2650330	99	56	49,6	cyclictest	2751381	-21	Chrome_ChildIOT	08:45:14	2
2650328	99	56	52,3	cyclictest	2772598	-21	kworker/u8:5+flush-179:0	09:15:15	1
2650333	99	55	47,6	cyclictest	2944924	-31	munin-html	11:50:36	3
2650328	99	54	49,4	cyclictest	2899054	-21	kworker/u8:0+flush-179:0	11:15:29	1
2650323	99	53	50,2	cyclictest	2644634	-21	kworker/u8:0+events_unbound	07:50:30	0
2650323	99	53	49,3	cyclictest	2909465	-21	kworker/u8:2+flush-179:0	12:01:26	0
2650323	99	53	49,3	cyclictest	2847505	-21	kworker/u8:3+events_unbound	10:51:43	0
2650323	99	53	49,3	cyclictest	2733658	-21	kworker/u8:1+events_unbound	09:30:15	0
2650323	99	53	49,3	cyclictest	2673608	-21	kworker/u8:5+events_unbound	07:30:16	0
2650323	99	53	49,2	cyclictest	2713243	-21	kworker/u8:4+events_unbound	08:25:35	0
2650323	99	53	47,5	cyclictest	247560	-21	ThreadPoolForeg	07:45:00	0
2650323	99	52	48,3	cyclictest	2733658	-21	kworker/u8:1+flush-179:0	08:45:37	0
2650323	99	52	45,5	cyclictest	2894579	-21	/usr/share/muni	11:05:13	0
2650328	99	51	47,3	cyclictest	2644634	-21	kworker/u8:0+flush-179:0	07:40:00	1
2650328	99	51	46,4	cyclictest	2707684	-21	kworker/u8:0+flush-179:0	08:20:15	1
2650328	99	51	45,4	cyclictest	2791670	-21	kworker/u8:2+flush-179:0	09:25:36	1
2650328	99	50	47,2	cyclictest	2965149	-21	kworker/u8:2+flush-179:0	12:35:16	1
2650323	99	50	45,4	cyclictest	2965688	-21	kworker/u8:3+events_unbound	12:21:18	0
2650323	99	49	46,2	cyclictest	2707685	-21	kworker/u8:2+flush-179:0	08:55:14	0
2650330	99	48	45,2	cyclictest	2899054	-21	kworker/u8:0+flush-179:0	12:25:00	2
2650330	99	48	45,2	cyclictest	2692414	-21	kworker/2:0+pm	08:24:20	2
2650330	99	48	42,4	cyclictest	2854657	-21	ntpq	10:25:18	2
2650328	99	48	45,2	cyclictest	2888877	-21	kworker/u8:4+flush-179:0	11:05:15	1
2650328	99	48	44,3	cyclictest	2909465	-21	kworker/u8:2+flush-179:0	11:20:30	1
2650328	99	48	43,4	cyclictest	2957402	-21	apt-get	12:05:16	1
2650328	99	48	43,4	cyclictest	2847505	-21	kworker/u8:3+flush-179:0	10:20:10	1
2650328	99	48	42,4	cyclictest	2965149	-21	kworker/u8:2+events_unbound	12:29:19	1
2650328	99	48	42,4	cyclictest	2965149	-21	kworker/u8:2+events_unbound	12:29:18	1
2650328	99	48	37,10	cyclictest	2644634	-21	kworker/u8:0+flush-179:0	07:46:25	1
2650328	99	48	31,15	cyclictest	2888877	-21	kworker/u8:4+flush-179:0	11:31:30	1
2650323	99	48	45,2	cyclictest	2929808	-21	kworker/u8:5+flush-179:0	11:39:59	0
2650323	99	48	43,4	cyclictest	2929808	-21	kworker/u8:5+flush-179:0	12:15:17	0
2650323	99	48	43,4	cyclictest	2738840	-21	kworker/u8:0+flush-179:0	08:40:32	0
2650333	99	47	42,4	cyclictest	2644634	-21	kworker/u8:0+flush-179:0	07:15:56	3
2650333	99	47	31,4	cyclictest	2888877	-21	kworker/u8:4+flush-179:0	11:25:36	3
2650333	99	47	11,35	cyclictest	247563	-13	Compositor	08:42:21	3
2650330	99	47	32,14	cyclictest	2847505	-21	kworker/u8:3+flush-179:0	10:30:54	2
2650328	99	47	44,2	cyclictest	2707685	-21	kworker/u8:2+flush-179:0	08:25:28	1
2650328	99	47	43,3	cyclictest	2814151	-21	kworker/u8:1+events_unbound	09:50:31	1
2650328	99	47	42,4	cyclictest	2745177	-21	/usr/share/muni	08:40:07	1
2650328	99	47	41,5	cyclictest	2827518	-21	/usr/share/muni	10:00:03	1
2650328	99	47	32,3	cyclictest	2772598	-21	kworker/u8:5+events_unbound	09:21:15	1
2650328	99	47	32,13	cyclictest	2945271	-21	kworker/u8:1+flush-179:0	12:04:35	1
2650323	99	47	43,3	cyclictest	2847505	-21	kworker/u8:3+events_unbound	10:25:34	0
2650323	99	47	43,3	cyclictest	2780372	-21	kworker/u8:0+flush-179:0	09:20:21	0
2650323	99	47	43,3	cyclictest	2671664	-21	kworker/u8:1+events_unbound	07:50:00	0
2650333	99	46	43,2	cyclictest	2888877	-21	kworker/u8:4+flush-179:0	11:01:53	3
2650330	99	46	22,22	cyclictest	0	-21	swapper/2	12:15:18	2
2650328	99	46	42,3	cyclictest	2867769	-21	kworker/u8:1+events_unbound	10:55:32	1
2650328	99	46	42,3	cyclictest	2733658	-21	kworker/u8:1+flush-179:0	08:48:20	1
2650323	99	46	44,2	cyclictest	2801258	-21	kworker/u8:3+flush-179:0	09:40:32	0
2650323	99	46	43,3	cyclictest	2733658	-21	kworker/u8:1+flush-179:0	09:17:00	0
2650323	99	46	43,2	cyclictest	2899054	-21	kworker/u8:0+flush-179:0	11:30:12	0
2650323	99	46	43,2	cyclictest	2842204	-21	kworker/u8:2+flush-179:0	10:12:54	0
2650323	99	46	42,3	cyclictest	2814151	-21	kworker/u8:1+events_unbound	10:05:34	0
2650323	99	46	42,3	cyclictest	2707685	-21	kworker/u8:2+flush-179:0	08:35:16	0
2650323	99	46	41,3	cyclictest	2658067	-21	kworker/u8:3+events_unbound	07:35:23	0
2650333	99	45	39,5	cyclictest	2677388	-21	/usr/share/muni	07:35:03	3
2650330	99	45	40,4	cyclictest	2916229	-21	apt-get	11:25:13	2
2650330	99	45	39,5	cyclictest	2920165	-21	/usr/share/muni	11:30:04	2
2650330	99	45	24,20	cyclictest	2644634	-21	kworker/u8:0+flush-179:0	07:54:34	2
2650330	99	45	21,23	cyclictest	247560	-21	ThreadPoolForeg	07:35:17	2
2650328	99	45	42,2	cyclictest	2888877	-21	kworker/u8:4+flush-179:0	11:35:29	1
2650328	99	45	41,3	cyclictest	2814151	-21	kworker/u8:1+flush-179:0	10:05:37	1
2650328	99	45	40,4	cyclictest	2899054	-21	kworker/u8:0+flush-179:0	11:25:28	1
2650328	99	45	40,4	cyclictest	2814151	-21	kworker/u8:1+flush-179:0	09:45:36	1
2650328	99	45	40,4	cyclictest	2644634	-21	kworker/u8:0+flush-179:0	07:40:06	1
2650323	99	45	42,2	cyclictest	2909465	-21	kworker/u8:2+events_unbound	11:51:21	0
2650323	99	45	41,3	cyclictest	2888877	-21	kworker/u8:4+events_unbound	11:00:15	0
2650323	99	45	41,3	cyclictest	2842204	-21	kworker/u8:2+flush-179:0	10:20:23	0
2650323	99	45	39,5	cyclictest	2667073	-21	/usr/share/muni	07:25:23	0
2650333	99	44	38,5	cyclictest	2885030	-21	ntpq	10:55:11	3
2650330	99	44	42,1	cyclictest	1887563	-1	kworker/2:1H+kblockd	09:58:59	2
2650330	99	44	32,11	cyclictest	2633407	-21	kworker/2:1+pm	07:18:55	2
2650328	99	44	39,3	cyclictest	2760435	-21	kworker/u8:0+flush-179:0	08:55:10	1
2650328	99	44	29,14	cyclictest	2847505	-21	kworker/u8:3+flush-179:0	10:42:34	1
2650323	99	44	41,3	cyclictest	2772598	-21	kworker/u8:5+flush-179:0	09:35:31	0
2650323	99	44	40,3	cyclictest	2888877	-21	kworker/u8:4+events_unbound	10:58:32	0
2650323	99	44	38,4	cyclictest	2718891	-21	/usr/share/muni	08:15:08	0
2650323	99	44	26,17	cyclictest	1260	-21	snmpd	09:56:23	0
2650330	99	43	39,3	cyclictest	2890704	-21	apt-get	11:00:13	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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