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 Fri Feb 13, 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
971500	2	162	0,2	sleep7	971501	-21	cut	07:01:04	7
971500	2	162	0,2	sleep7	971501	-21	cut	07:01:04	7
979003	99	50	48,2	cyclictest	1538103	-21	kworker/u16:2+events_unbound	11:26:17	6
979003	99	49	47,2	cyclictest	1559145	-21	kworker/u16:4+events_unbound	12:06:05	6
979003	99	46	44,2	cyclictest	1011484	-21	kworker/u16:1+events_unbound	09:36:08	6
978514	2	46	36,7	sleep4	0	-21	swapper/4	07:03:02	4
978514	2	46	36,7	sleep4	0	-21	swapper/4	07:03:02	4
6265	89	44	0,37	rtkit-daemon	0	-21	swapper/5	07:02:53	5
6265	89	44	0,37	rtkit-daemon	0	-21	swapper/5	07:02:53	5
979003	99	42	40,2	cyclictest	1538103	-21	kworker/u16:2+events_unbound	11:21:12	6
978996	99	42	39,2	cyclictest	1429459	-21	kworker/u16:1+flush-8:0	12:00:41	5
978996	99	42	39,2	cyclictest	1136033	-21	kworker/u16:2+flush-8:0	08:50:46	5
979008	99	41	36,4	cyclictest	1417348	-21	latency_hist	10:30:46	7
979003	99	41	39,2	cyclictest	1559145	-21	kworker/u16:4+flush-8:0	11:56:04	6
979003	99	40	38,2	cyclictest	1429459	-21	kworker/u16:1+events_unbound	11:55:05	6
979003	99	39	37,2	cyclictest	1598515	-21	kworker/u16:0+flush-8:0	11:46:02	6
979003	99	38	36,2	cyclictest	1682909	-21	kworker/u16:1+events_unbound	12:31:18	6
979003	99	38	36,2	cyclictest	1538103	-21	kworker/u16:2+events_unbound	11:31:03	6
978996	99	38	36,2	cyclictest	1405636	-21	kworker/u16:0+flush-8:0	11:10:46	5
979008	99	37	31,5	cyclictest	650	-21	systemd-journal	09:50:46	7
979003	99	37	35,2	cyclictest	1634820	-21	kworker/u16:2+events_unbound	12:11:10	6
979003	99	37	35,2	cyclictest	1538103	-21	kworker/u16:2+events_unbound	11:37:45	6
978534	2	36	26,7	sleep6	0	-21	swapper/6	07:03:20	6
978534	2	36	26,7	sleep6	0	-21	swapper/6	07:03:20	6
979003	99	35	33,2	cyclictest	1405636	-21	kworker/u16:0+flush-8:0	11:01:02	6
979008	99	34	0,32	cyclictest	1068866	-21	awk	07:50:46	7
979003	99	34	32,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	10:47:45	6
979008	99	33	32,0	cyclictest	0	-21	swapper/7	12:01:16	7
979003	99	33	32,1	cyclictest	1429459	-21	kworker/u16:1+events_unbound	10:56:17	6
979003	99	33	31,2	cyclictest	1559145	-21	kworker/u16:4+events_unbound	11:40:59	6
979003	99	33	31,2	cyclictest	1429459	-21	kworker/u16:1+events_unbound	11:11:16	6
979003	99	33	31,2	cyclictest	1011484	-21	kworker/u16:1+events_unbound	09:53:04	6
979008	99	32	31,1	cyclictest	0	-21	swapper/7	12:20:45	7
979003	99	32	30,2	cyclictest	1682909	-21	kworker/u16:1+events_unbound	12:28:57	6
979003	99	32	30,2	cyclictest	1559145	-21	kworker/u16:4+flush-8:0	12:01:13	6
979003	99	32	30,2	cyclictest	1011484	-21	kworker/u16:1+events_unbound	09:59:29	6
979008	99	31	25,5	cyclictest	650	-21	systemd-journal	09:25:46	7
979003	99	31	29,2	cyclictest	1559145	-21	kworker/u16:4+flush-8:0	12:21:01	6
979003	99	31	29,2	cyclictest	1368749	-21	kworker/u16:2+flush-8:0	10:30:52	6
979003	99	31	29,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	09:26:45	6
979003	99	31	29,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	09:08:46	6
978996	99	31	28,2	cyclictest	1405636	-21	kworker/u16:0+flush-8:0	10:46:03	5
979003	99	30	28,2	cyclictest	1634820	-21	kworker/u16:2+events_unbound	12:18:53	6
979003	99	30	28,2	cyclictest	1011484	-21	kworker/u16:1+flush-8:0	09:16:53	6
979003	99	30	28,2	cyclictest	1011484	-21	kworker/u16:1+events_unbound	09:34:52	6
979003	99	29	27,2	cyclictest	1405636	-21	kworker/u16:0+events_unbound	10:42:21	6
979003	99	29	27,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	10:02:46	6
979003	99	29	27,2	cyclictest	1011484	-21	kworker/u16:1+events_unbound	10:13:16	6
979003	99	28	27,1	cyclictest	1212061	-21	kworker/u16:0+events_unbound	09:12:37	6
979003	99	28	26,2	cyclictest	1212061	-21	kworker/u16:0+events_unbound	09:44:32	6
979003	99	28	26,2	cyclictest	1202235	-21	kworker/u16:3+flush-8:0	10:35:56	6
979003	99	28	26,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	11:18:56	6
979003	99	28	26,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	10:06:37	6
979003	99	28	26,2	cyclictest	1116701	-21	kworker/u16:0+flush-8:0	08:56:14	6
978996	99	28	26,2	cyclictest	979204	-21	kworker/u16:4+events_unbound	07:40:46	5
978992	99	28	26,2	cyclictest	1116701	-21	kworker/u16:0+events_unbound	08:51:01	4
979003	99	27	25,2	cyclictest	1011484	-21	kworker/u16:1+events_unbound	10:23:53	6
979003	99	27	25,2	cyclictest	1011484	-21	kworker/u16:1+events_unbound	09:47:44	6
978996	99	27	25,2	cyclictest	1538103	-21	kworker/u16:2+flush-8:0	11:26:13	5
978996	99	27	25,2	cyclictest	1011484	-21	kworker/u16:1+flush-8:0	10:11:04	5
978996	99	27	25,2	cyclictest	1011484	-21	kworker/u16:1+flush-8:0	09:05:41	5
1498165	2	27	0,0	chrt	0	-21	swapper/4	11:01:09	4
1141571	2	27	0,1	chrt	1141574	-21	cut	08:26:05	7
979008	99	26	24,1	cyclictest	1559165	-21	ssh	11:26:12	7
979003	99	26	25,1	cyclictest	1405636	-21	kworker/u16:0+events_unbound	11:08:15	6
979003	99	26	24,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	10:19:56	6
979003	99	26	24,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	10:19:56	6
979008	99	25	24,0	cyclictest	0	-21	swapper/7	12:21:16	7
979008	99	25	22,2	cyclictest	1197490	-21	kthreadcore	08:56:04	7
979008	99	25	0,23	cyclictest	5747	-21	gnome-shell	07:15:56	7
979003	99	25	23,2	cyclictest	1136033	-21	kworker/u16:2+events_unbound	08:46:08	6
978992	99	25	22,3	cyclictest	1405636	-21	kworker/u16:0+flush-8:0	11:16:39	4
979008	99	24	24,0	cyclictest	0	-21	swapper/7	12:11:16	7
979003	99	24	22,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	10:29:25	6
978992	99	24	21,2	cyclictest	1202235	-21	kworker/u16:3+flush-8:0	09:45:57	4
979003	99	23	21,2	cyclictest	1202235	-21	kworker/u16:3+flush-8:0	10:54:20	6
979003	99	23	21,2	cyclictest	1202235	-21	kworker/u16:3+events_unbound	09:25:17	6
978996	99	23	21,2	cyclictest	916083	-21	kworker/u16:2+flush-8:0	07:16:11	5
978996	99	23	21,2	cyclictest	1202235	-21	kworker/u16:3+flush-8:0	11:05:41	5
978992	99	23	21,2	cyclictest	1202235	-21	kworker/u16:3+flush-8:0	10:21:01	4
978996	99	22	20,2	cyclictest	1212061	-21	kworker/u16:0+flush-8:0	09:06:11	5
979008	99	21	21,0	cyclictest	0	-21	swapper/7	09:36:16	7
979008	99	21	20,1	cyclictest	1282869	-21	ssh	09:32:45	7
979008	99	21	20,0	cyclictest	0	-21	swapper/7	11:30:59	7
979008	99	21	0,20	cyclictest	955	-21	in:imjournal	10:35:46	7
978996	99	21	19,2	cyclictest	1405636	-21	kworker/u16:0+flush-8:0	10:26:01	5
979008	99	20	15,4	cyclictest	1518753	-21	kthreadcore	11:11:07	7
979008	99	20	0,19	cyclictest	1596830	-21	ssh	11:42:44	7
979008	99	20	0,19	cyclictest	124	-21	kswapd0	10:21:11	7
979008	99	20	0,18	cyclictest	1173830	-21	latency_hist	08:45:46	7
978996	99	20	18,2	cyclictest	916083	-21	kworker/u16:2+events_unbound	07:25:59	5
978996	99	20	18,2	cyclictest	916083	-21	kworker/u16:2+events_unbound	07:25:59	5
978996	99	20	18,2	cyclictest	1212061	-21	kworker/u16:0+events_unbound	09:40:41	5
978996	99	20	18,2	cyclictest	1011484	-21	kworker/u16:1+flush-8:0	09:51:25	5
978996	99	19	17,2	cyclictest	1011484	-21	kworker/u16:1+events_unbound	07:41:01	5
978996	99	19	16,2	cyclictest	1011484	-21	kworker/u16:1+events_unbound	09:56:02	5
978992	99	19	17,2	cyclictest	1682909	-21	kworker/u16:1+flush-8:0	12:30:45	4
979008	99	18	17,0	cyclictest	0	-21	swapper/7	10:11:05	7
979008	99	18	15,2	cyclictest	1632527	-21	ssh	11:56:46	7
979003	99	18	16,2	cyclictest	979204	-21	kworker/u16:4+flush-8:0	07:41:02	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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