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 Sun Jul 19, 2026 12:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
298982	2	98	0,1	sleep7	298983	-21	grep	09:24:59	7
298982	2	98	0,1	sleep7	298983	-21	grep	09:24:59	7
19054	2	54	42,8	sleep4	0	-21	swapper/4	07:08:52	4
18851	2	54	20,29	sleep7	0	-21	swapper/7	07:05:58	7
19085	2	43	33,7	sleep5	0	-21	swapper/5	07:09:17	5
19387	99	35	33,2	cyclictest	33916	-21	kworker/u16:1+flush-8:0	07:20:07	6
19387	99	35	33,2	cyclictest	33916	-21	kworker/u16:1+flush-8:0	07:20:07	6
19383	99	35	31,3	cyclictest	33916	-21	kworker/u16:1+flush-8:0	07:18:51	5
18916	2	30	19,8	sleep6	0	-21	swapper/6	07:06:53	6
19383	99	29	27,2	cyclictest	110955	-21	kworker/u16:4+events_unbound	07:57:57	5
19383	99	28	26,2	cyclictest	9497	-21	kworker/u16:2+events_unbound	08:18:11	5
19383	99	28	26,2	cyclictest	247011	-21	kworker/u16:1+events_unbound	09:18:40	5
19383	99	28	26,2	cyclictest	169217	-21	kworker/u16:0+events_unbound	08:25:32	5
19383	99	27	25,2	cyclictest	33916	-21	kworker/u16:1+events_unbound	08:53:52	5
19390	99	26	0,24	cyclictest	648	-21	systemd-journal	08:54:32	7
19383	99	26	24,2	cyclictest	81809	-21	kworker/u16:0+flush-8:0	08:00:33	5
19383	99	26	24,2	cyclictest	110955	-21	kworker/u16:4+flush-8:0	08:10:33	5
19380	99	26	24,2	cyclictest	503035	-21	kworker/u16:1+flush-8:0	11:25:03	4
19380	99	26	24,2	cyclictest	503035	-21	kworker/u16:1+flush-8:0	11:25:03	4
19390	99	25	0,23	cyclictest	648	-21	systemd-journal	08:14:37	7
19383	99	25	23,2	cyclictest	9497	-21	kworker/u16:2+events_unbound	08:35:05	5
19383	99	25	23,2	cyclictest	9497	-21	kworker/u16:2+events_unbound	07:40:37	5
19383	99	25	23,2	cyclictest	42472	-21	kworker/u16:6+events_unbound	07:27:24	5
19383	99	25	23,2	cyclictest	368111	-21	kworker/u16:0+events_unbound	10:25:16	5
19383	99	25	23,2	cyclictest	355460	-21	kworker/u16:2+events_unbound	10:42:59	5
19383	99	25	23,2	cyclictest	33916	-21	kworker/u16:1+events_unbound	07:21:20	5
19383	99	25	23,2	cyclictest	33916	-21	kworker/u16:1+events_unbound	07:21:20	5
19383	99	25	23,2	cyclictest	182996	-21	kworker/u16:3+events_unbound	08:31:40	5
19383	99	25	23,2	cyclictest	169217	-21	kworker/u16:0+flush-8:0	09:40:30	5
19390	99	24	20,3	cyclictest	1302	-21	snmpd	09:20:08	7
19387	99	24	21,2	cyclictest	169217	-21	kworker/u16:0+flush-8:0	09:24:38	6
19387	99	24	21,2	cyclictest	169217	-21	kworker/u16:0+flush-8:0	09:24:38	6
19387	99	24	20,3	cyclictest	182996	-21	kworker/u16:3+flush-8:0	08:30:04	6
19383	99	24	22,2	cyclictest	368111	-21	kworker/u16:0+events_unbound	10:50:25	5
19383	99	24	22,2	cyclictest	368111	-21	kworker/u16:0+events_unbound	09:59:54	5
19383	99	24	22,2	cyclictest	355460	-21	kworker/u16:2+events_unbound	09:58:26	5
19383	99	24	22,2	cyclictest	182996	-21	kworker/u16:3+events_unbound	08:57:51	5
19383	99	24	22,2	cyclictest	110955	-21	kworker/u16:4+flush-8:0	08:06:07	5
19387	99	23	21,2	cyclictest	9497	-21	kworker/u16:2+flush-8:0	08:05:09	6
19387	99	23	21,2	cyclictest	33916	-21	kworker/u16:1+flush-8:0	07:18:40	6
19383	99	23	21,2	cyclictest	9497	-21	kworker/u16:2+events_unbound	07:33:47	5
19383	99	23	21,2	cyclictest	712507	-21	kworker/u16:3+events_unbound	12:19:45	5
19383	99	23	21,2	cyclictest	355460	-21	kworker/u16:2+flush-8:0	10:17:25	5
19383	99	23	21,2	cyclictest	33916	-21	kworker/u16:1+flush-8:0	08:45:03	5
19383	99	23	21,2	cyclictest	247011	-21	kworker/u16:1+flush-8:0	09:20:24	5
19383	99	23	21,2	cyclictest	247011	-21	kworker/u16:1+events_unbound	10:22:22	5
19383	99	23	21,2	cyclictest	169217	-21	kworker/u16:0+flush-8:0	09:45:15	5
19383	99	22	20,2	cyclictest	9497	-21	kworker/u16:2+flush-8:0	07:49:00	5
19383	99	22	20,2	cyclictest	648297	-21	kworker/u16:0+events_unbound	12:25:45	5
19383	99	22	20,2	cyclictest	503035	-21	kworker/u16:1+events_unbound	11:55:35	5
19383	99	22	20,2	cyclictest	251853	-21	kworker/u16:2+events_unbound	09:06:35	5
773630	2	21	0,1	chrt	773631	-21	sh	12:39:26	7
393330	2	21	0,1	chrt	393327	-21	df	10:04:50	7
19383	99	21	19,2	cyclictest	9497	-21	kworker/u16:2+events_unbound	08:22:44	5
19383	99	21	19,2	cyclictest	574488	-21	kworker/u16:3+flush-8:0	11:50:18	5
19383	99	21	19,2	cyclictest	247011	-21	kworker/u16:1+flush-8:0	09:25:49	5
19383	99	21	19,2	cyclictest	247011	-21	kworker/u16:1+flush-8:0	09:25:49	5
19383	99	21	19,2	cyclictest	2087884	-21	kworker/u16:3+events_unbound	07:35:23	5
19383	99	20	18,2	cyclictest	9497	-21	kworker/u16:2+flush-8:0	07:12:08	5
19383	99	20	18,2	cyclictest	648297	-21	kworker/u16:0+flush-8:0	12:09:53	5
19383	99	20	18,2	cyclictest	355460	-21	kworker/u16:2+flush-8:0	10:35:14	5
19383	99	20	18,2	cyclictest	169217	-21	kworker/u16:0+flush-8:0	09:02:59	5
19383	99	20	18,2	cyclictest	169217	-21	kworker/u16:0+events_unbound	08:42:36	5
19380	99	20	17,2	cyclictest	182996	-21	kworker/u16:3+flush-8:0	10:44:47	4
19380	99	20	17,2	cyclictest	182996	-21	kworker/u16:3+flush-8:0	09:50:31	4
19387	99	19	17,2	cyclictest	355460	-21	kworker/u16:2+events_unbound	10:34:53	6
19387	99	19	15,3	cyclictest	355386	-21	cat	09:49:38	6
19387	99	19	15,3	cyclictest	120355	-21	cat	07:59:33	6
19383	99	19	17,2	cyclictest	368111	-21	kworker/u16:0+events_unbound	10:55:22	5
19383	99	19	17,2	cyclictest	182996	-21	kworker/u16:3+flush-8:0	09:36:55	5
19390	99	18	14,3	cyclictest	1302	-21	snmpd	09:39:42	7
19383	99	18	16,2	cyclictest	355460	-21	kworker/u16:2+events_unbound	11:10:40	5
19383	99	18	16,2	cyclictest	247011	-21	kworker/u16:1+flush-8:0	09:29:48	5
19383	99	18	16,2	cyclictest	247011	-21	kworker/u16:1+flush-8:0	09:29:48	5
19383	99	18	16,2	cyclictest	110367	-21	kworker/u16:3+events_unbound	07:54:26	5
19383	99	17	15,2	cyclictest	247011	-21	kworker/u16:1+events_unbound	09:10:39	5
19380	99	17	15,2	cyclictest	182996	-21	kworker/u16:3+flush-8:0	09:40:08	4
19380	99	17	14,2	cyclictest	182996	-21	kworker/u16:3+flush-8:0	09:35:35	4
737451	2	16	0,0	sleep6	0	-21	swapper/6	12:24:50	6
19383	99	16	12,3	cyclictest	589312	-21	awk	11:24:37	5
19380	99	16	13,3	cyclictest	355460	-21	kworker/u16:2+flush-8:0	10:05:32	4
19380	99	16	12,3	cyclictest	33916	-21	kworker/u16:1+flush-8:0	07:45:13	4
19390	99	15	11,3	cyclictest	1302	-21	snmpd	09:05:17	7
19387	99	15	14,1	cyclictest	0	-21	swapper/6	10:47:55	6
19387	99	15	11,3	cyclictest	724658	-21	cat	12:19:38	6
19387	99	15	11,3	cyclictest	182996	-21	kworker/u16:3+flush-8:0	10:40:07	6
19387	99	15	0,15	cyclictest	0	-21	swapper/6	09:38:14	6
19383	99	15	13,2	cyclictest	574488	-21	kworker/u16:3+flush-8:0	11:35:28	5
19380	99	15	11,3	cyclictest	355460	-21	kworker/u16:2+flush-8:0	11:04:37	4
19380	99	15	0,1	cyclictest	0	-21	swapper/4	10:20:59	4
19390	99	14	9,4	cyclictest	597909	-21	cut	11:25:03	7
19390	99	14	9,4	cyclictest	597909	-21	cut	11:25:03	7
19390	99	14	3,10	cyclictest	6010	-21	gnome-software	07:18:38	7
19390	99	14	13,0	cyclictest	0	-21	swapper/7	11:53:07	7
19390	99	14	13,0	cyclictest	0	-21	swapper/7	10:29:52	7
19390	99	14	12,1	cyclictest	0	-21	swapper/7	09:45:07	7
19387	99	14	10,3	cyclictest	343037	-21	cat	09:44:38	6
19387	99	14	0,1	cyclictest	86	-21	ksoftirqd/6	09:09:41	6
19387	99	14	0,1	cyclictest	0	-21	swapper/6	12:23:37	6
19387	99	14	0,1	cyclictest	0	-21	swapper/6	11:00:41	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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