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 Thu Apr 23, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3324132	2	93	0,1	sleep5	0	-21	swapper/5	11:54:25	5
2686182	99	44	42,2	cyclictest	2668039	-21	kworker/u16:2+events_unbound	07:24:25	6
2686182	99	43	41,2	cyclictest	3394572	-21	kworker/u16:4+events_unbound	12:24:24	6
2685771	2	42	4,32	sleep7	0	-21	swapper/7	07:07:40	7
2685609	2	39	28,8	sleep4	0	-21	swapper/4	07:05:21	4
2686183	99	38	33,3	cyclictest	2795453	-21	latency_hist	08:04:26	7
2685896	2	37	27,7	sleep5	0	-21	swapper/5	07:09:23	5
2686183	99	35	34,0	cyclictest	0	-21	swapper/7	12:14:20	7
2686182	99	34	33,1	cyclictest	3066616	-21	kworker/u16:2+events_unbound	12:01:08	6
2686183	99	33	29,2	cyclictest	3084287	-21	kthreadcore	10:14:44	7
2686182	99	33	30,2	cyclictest	3066616	-21	kworker/u16:2+events_unbound	10:09:43	6
2686182	99	32	30,2	cyclictest	2795492	-21	kworker/u16:3+events_unbound	08:09:41	6
2686182	99	31	29,2	cyclictest	1947538	-21	kworker/u16:6+flush-8:0	07:14:41	6
2686183	99	30	29,0	cyclictest	0	-21	swapper/7	09:24:48	7
2686183	99	30	28,1	cyclictest	2993756	-21	ssh	09:39:21	7
2686182	99	30	28,2	cyclictest	3101715	-21	kworker/u16:0+flush-8:0	11:04:52	6
2686182	99	30	28,2	cyclictest	3101715	-21	kworker/u16:0+flush-8:0	11:04:52	6
2686182	99	30	27,2	cyclictest	2717895	-21	kworker/u16:0+events_unbound	07:24:44	6
2686182	99	29	26,2	cyclictest	2725960	-21	kworker/u16:1+events_unbound	07:29:41	6
3149708	2	28	0,1	chrt	0	-21	swapper/7	10:39:50	7
2697444	2	28	0,1	chrt	2686172	-21	cyclictest	07:14:29	7
2686183	99	28	27,0	cyclictest	0	-21	swapper/7	10:54:44	7
2686182	99	28	27,1	cyclictest	3248986	-21	kworker/u16:3+events_unbound	12:34:33	6
2686182	99	28	26,2	cyclictest	3066616	-21	kworker/u16:2+events_unbound	10:49:05	6
2686182	99	28	26,2	cyclictest	3017093	-21	kworker/u16:1+events_unbound	10:19:52	6
2686182	99	28	26,2	cyclictest	3017093	-21	kworker/u16:1+events_unbound	09:48:36	6
2686183	99	27	24,2	cyclictest	3349700	-21	ssh	12:04:40	7
2686182	99	27	25,2	cyclictest	2717895	-21	kworker/u16:0+flush-8:0	07:49:49	6
2685620	2	27	17,7	sleep6	0	-21	swapper/6	07:05:31	6
3114114	2	26	0,1	chrt	3114113	-21	rm	10:25:48	7
3114114	2	26	0,1	chrt	3114113	-21	rm	10:25:48	7
2686182	99	25	23,2	cyclictest	3101715	-21	kworker/u16:0+events_unbound	10:55:36	6
2686183	99	24	22,1	cyclictest	0	-21	swapper/7	08:44:44	7
2686182	99	24	23,1	cyclictest	2879147	-21	kworker/u16:2+events_unbound	09:15:35	6
2686182	99	24	22,2	cyclictest	3101715	-21	kworker/u16:0+events_unbound	11:09:27	6
2686182	99	24	22,2	cyclictest	2853369	-21	kworker/u16:0+events_unbound	09:29:51	6
2686175	99	24	20,3	cyclictest	3101715	-21	kworker/u16:0+flush-8:0	10:40:28	4
2686183	99	23	19,2	cyclictest	3140623	-21	munin-run	10:39:25	7
2686182	99	23	21,2	cyclictest	3066616	-21	kworker/u16:2+events_unbound	11:57:37	6
2686182	99	23	21,2	cyclictest	3066616	-21	kworker/u16:2+events_unbound	10:29:54	6
2686183	99	22	17,4	cyclictest	3250644	-21	latency_hist	11:24:25	7
2686182	99	22	20,2	cyclictest	3066616	-21	kworker/u16:2+events_unbound	11:34:49	6
2686182	99	22	20,2	cyclictest	3066616	-21	kworker/u16:2+events_unbound	11:15:36	6
2686182	99	22	15,6	cyclictest	3248986	-21	kworker/u16:3+flush-8:0	12:09:25	6
2686183	99	21	19,1	cyclictest	0	-21	swapper/7	10:44:56	7
2686182	99	21	19,2	cyclictest	3248986	-21	kworker/u16:3+events_unbound	12:28:44	6
2686182	99	21	19,2	cyclictest	3101715	-21	kworker/u16:0+events_unbound	11:19:54	6
2686182	99	21	18,2	cyclictest	2879147	-21	kworker/u16:2+events_unbound	08:54:36	6
2686178	99	21	18,3	cyclictest	3017093	-21	kworker/u16:1+flush-8:0	09:55:28	5
2686183	99	20	15,4	cyclictest	3214053	-21	latency_hist	11:09:25	7
2686183	99	20	15,4	cyclictest	3214053	-21	latency_hist	11:09:25	7
2686182	99	20	18,2	cyclictest	3357992	-21	kworker/u16:1+flush-8:0	12:14:32	6
2686182	99	20	18,2	cyclictest	3017093	-21	kworker/u16:1+events_unbound	09:58:36	6
2686182	99	20	18,2	cyclictest	2918854	-21	kworker/u16:3+events_unbound	09:38:36	6
2686182	99	20	18,2	cyclictest	2918854	-21	kworker/u16:3+events_unbound	09:25:35	6
2686182	99	20	18,2	cyclictest	2843073	-21	kworker/u16:4+events_unbound	08:39:49	6
2686182	99	20	18,2	cyclictest	2737969	-21	kworker/u16:2+flush-8:0	08:29:44	6
2686182	99	20	17,2	cyclictest	2717895	-21	kworker/u16:0+flush-8:0	07:44:41	6
2686183	99	19	17,1	cyclictest	0	-21	swapper/7	09:29:49	7
2686183	99	19	14,4	cyclictest	3348379	-21	latency_hist	12:04:25	7
2686183	99	19	13,5	cyclictest	635	-21	systemd-journal	07:29:25	7
2686183	99	19	0,18	cyclictest	2757112	-21	awk	07:44:25	7
2686182	99	19	17,2	cyclictest	2795492	-21	kworker/u16:3+events_unbound	08:29:20	6
2686183	99	18	17,0	cyclictest	0	-21	swapper/7	12:19:40	7
2686183	99	18	17,0	cyclictest	0	-21	swapper/7	11:24:40	7
2686183	99	18	16,1	cyclictest	0	-21	swapper/7	11:49:43	7
2686182	99	18	16,2	cyclictest	2918854	-21	kworker/u16:3+events_unbound	09:09:37	6
2686182	99	18	15,2	cyclictest	3066616	-21	kworker/u16:2+events_unbound	11:44:32	6
2686182	99	18	0,17	cyclictest	0	-21	swapper/6	11:44:01	6
2686183	99	17	13,3	cyclictest	1234	-21	snmpd	08:22:13	7
2686183	99	17	13,3	cyclictest	1234	-21	snmpd	08:22:13	7
2686183	99	17	12,4	cyclictest	635	-21	systemd-journal	09:54:26	7
2686183	99	17	1,14	cyclictest	3222993	-21	ssh	11:09:48	7
2686183	99	17	0,15	cyclictest	5819	-21	gnome-shell	10:32:34	7
2686182	99	17	0,3	cyclictest	3051760	-21	ldconfig	09:59:48	6
2686183	99	16	15,0	cyclictest	0	-21	swapper/7	11:39:05	7
2686183	99	16	15,0	cyclictest	0	-21	swapper/7	09:04:48	7
2686183	99	16	13,2	cyclictest	1234	-21	snmpd	08:18:25	7
2686183	99	16	13,2	cyclictest	0	-21	swapper/7	07:29:26	7
2686182	99	16	15,1	cyclictest	3042924	-21	kworker/u16:4+events_unbound	10:28:01	6
2686182	99	16	15,1	cyclictest	3042924	-21	kworker/u16:4+events_unbound	10:28:01	6
2686182	99	16	14,2	cyclictest	3138245	-21	kworker/u16:1+flush-8:0	10:44:25	6
2686182	99	16	14,2	cyclictest	2737969	-21	kworker/u16:2+flush-8:0	08:19:51	6
2686182	99	16	14,2	cyclictest	2737969	-21	kworker/u16:2+flush-8:0	08:19:51	6
2686182	99	16	0,15	cyclictest	3314536	-21	kthreadcore	11:49:42	6
2686175	99	16	15,1	cyclictest	0	-21	swapper/4	12:28:53	4
2686175	99	16	0,15	cyclictest	2918834	-21	kthreadcore	09:04:46	4
2686183	99	15	14,0	cyclictest	0	-21	swapper/7	10:19:39	7
2686183	99	15	11,3	cyclictest	1234	-21	snmpd	07:36:39	7
2686183	99	15	11,2	cyclictest	2695674	-21	munin-run	07:14:26	7
2686182	99	15	13,2	cyclictest	3248986	-21	kworker/u16:3+events_unbound	11:25:36	6
2686182	99	15	13,2	cyclictest	2853369	-21	kworker/u16:0+events_unbound	08:39:20	6
2686175	99	15	14,1	cyclictest	0	-21	swapper/4	11:19:53	4
2686175	99	15	14,1	cyclictest	0	-21	swapper/4	10:19:39	4
2686183	99	14	9,4	cyclictest	3238478	-21	latency_hist	11:19:25	7
2686183	99	14	13,0	cyclictest	0	-21	swapper/7	09:44:40	7
2686183	99	14	12,1	cyclictest	0	-21	swapper/7	08:04:50	7
2686183	99	14	10,3	cyclictest	1234	-21	snmpd	07:21:18	7
2686183	99	14	0,13	cyclictest	0	-21	swapper/7	09:59:29	7
2686182	99	14	13,1	cyclictest	2853369	-21	kworker/u16:0+flush-8:0	08:59:44	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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