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 Jul 16, 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
2978929	2	57	22,30	sleep7	0	-21	swapper/7	07:06:11	7
2978907	2	41	31,7	sleep5	0	-21	swapper/5	07:05:53	5
2979146	2	37	27,7	sleep6	0	-21	swapper/6	07:09:15	6
2978905	2	34	24,7	sleep4	0	-21	swapper/4	07:05:52	4
2979460	99	32	30,2	cyclictest	3039452	-21	kworker/u16:4+events_unbound	08:00:20	6
2979460	99	31	29,2	cyclictest	3377324	-21	kworker/u16:5+events_unbound	10:32:28	6
2979457	99	31	29,2	cyclictest	3414399	-21	kworker/u16:1+flush-8:0	11:00:16	5
2979457	99	31	29,2	cyclictest	3414399	-21	kworker/u16:1+flush-8:0	11:00:16	5
2979460	99	30	28,2	cyclictest	3537730	-21	kworker/u16:3+events_unbound	11:33:27	6
2979460	99	30	28,2	cyclictest	3377324	-21	kworker/u16:5+events_unbound	10:28:03	6
2979460	99	30	28,2	cyclictest	3225599	-21	kworker/u16:2+events_unbound	09:48:54	6
2979460	99	30	28,2	cyclictest	3139187	-21	kworker/u16:2+events_unbound	08:33:41	6
2979457	99	30	28,2	cyclictest	3599183	-21	kworker/u16:1+flush-8:0	12:10:20	5
2979460	99	29	27,2	cyclictest	3522039	-21	kworker/u16:2+events_unbound	11:24:02	6
2979460	99	29	27,2	cyclictest	3158173	-21	kworker/u16:0+events_unbound	10:48:10	6
2979460	99	29	27,2	cyclictest	3090171	-21	kworker/u16:1+events_unbound	09:02:25	6
2979460	99	28	26,2	cyclictest	3685672	-21	kworker/u16:1+events_unbound	12:23:21	6
2979460	99	28	26,2	cyclictest	3599183	-21	kworker/u16:1+events_unbound	12:09:05	6
2979460	99	28	26,2	cyclictest	3476053	-21	kworker/u16:3+events_unbound	11:09:54	6
2979460	99	28	26,2	cyclictest	3377324	-21	kworker/u16:5+events_unbound	10:51:18	6
2979460	99	28	26,2	cyclictest	3303232	-21	kworker/u16:3+events_unbound	10:09:52	6
2979460	99	28	26,2	cyclictest	3225599	-21	kworker/u16:2+events_unbound	09:53:00	6
2979460	99	28	26,2	cyclictest	3225599	-21	kworker/u16:2+events_unbound	09:29:07	6
2979460	99	28	26,2	cyclictest	3039452	-21	kworker/u16:4+events_unbound	07:58:25	6
2979460	99	28	26,2	cyclictest	3039452	-21	kworker/u16:4+events_unbound	07:52:21	6
2979457	99	28	26,2	cyclictest	3197010	-21	kworker/u16:3+events_unbound	09:20:04	5
2979460	99	27	25,2	cyclictest	3698000	-21	kworker/u16:4+events_unbound	12:27:31	6
2979460	99	27	25,2	cyclictest	3599379	-21	kworker/u16:2+events_unbound	11:49:34	6
2979460	99	27	25,2	cyclictest	3275642	-21	kworker/u16:1+flush-8:0	09:41:21	6
2979460	99	27	25,2	cyclictest	3158173	-21	kworker/u16:0+events_unbound	12:01:14	6
2979457	99	27	25,2	cyclictest	3090171	-21	kworker/u16:1+events_unbound	08:25:17	5
2979460	99	26	24,2	cyclictest	3599379	-21	kworker/u16:2+events_unbound	11:59:15	6
2979460	99	26	24,2	cyclictest	3377324	-21	kworker/u16:5+events_unbound	11:03:45	6
2979460	99	26	24,2	cyclictest	3377324	-21	kworker/u16:5+events_unbound	11:03:45	6
2979460	99	26	24,2	cyclictest	3158173	-21	kworker/u16:0+events_unbound	11:41:22	6
2979460	99	26	24,2	cyclictest	3090171	-21	kworker/u16:1+events_unbound	08:17:36	6
2979460	99	25	23,2	cyclictest	3599379	-21	kworker/u16:2+flush-8:0	11:53:47	6
2979460	99	25	23,2	cyclictest	3599379	-21	kworker/u16:2+events_unbound	12:37:11	6
2979460	99	25	23,2	cyclictest	3275642	-21	kworker/u16:1+events_unbound	10:06:37	6
2979460	99	25	23,2	cyclictest	3275642	-21	kworker/u16:1+events_unbound	10:00:22	6
2979460	99	25	23,2	cyclictest	3158173	-21	kworker/u16:0+flush-8:0	10:35:29	6
2979460	99	25	23,2	cyclictest	3158173	-21	kworker/u16:0+events_unbound	11:07:06	6
2979460	99	25	23,2	cyclictest	3100203	-21	kworker/u16:3+events_unbound	08:38:40	6
2979460	99	25	23,2	cyclictest	3090171	-21	kworker/u16:1+events_unbound	08:46:53	6
2979460	99	25	23,2	cyclictest	2993265	-21	kworker/u16:3+events_unbound	07:17:18	6
2979457	99	25	23,2	cyclictest	3090171	-21	kworker/u16:1+flush-8:0	08:24:11	5
2979457	99	25	21,3	cyclictest	3586846	-21	latency_hist	11:39:49	5
2979460	99	24	22,2	cyclictest	3599379	-21	kworker/u16:2+events_unbound	12:16:40	6
2979460	99	24	22,2	cyclictest	3537731	-21	kworker/u16:4+events_unbound	11:26:07	6
2979460	99	24	22,2	cyclictest	3377324	-21	kworker/u16:5+events_unbound	10:22:25	6
2979460	99	24	22,2	cyclictest	3225599	-21	kworker/u16:2+events_unbound	09:56:31	6
2979460	99	24	22,2	cyclictest	3158173	-21	kworker/u16:0+events_unbound	10:42:15	6
2979460	99	24	22,2	cyclictest	3158173	-21	kworker/u16:0+events_unbound	10:16:21	6
2979460	99	24	22,2	cyclictest	3158173	-21	kworker/u16:0+events_unbound	09:35:42	6
2979460	99	24	22,2	cyclictest	3090171	-21	kworker/u16:1+events_unbound	08:42:21	6
2979460	99	24	22,2	cyclictest	3051315	-21	kworker/u16:0+events_unbound	07:47:28	6
2979460	99	24	22,2	cyclictest	3039452	-21	kworker/u16:4+events_unbound	07:36:49	6
2979460	99	24	22,2	cyclictest	2989350	-21	kworker/u16:1+events_unbound	07:33:14	6
2979460	99	24	22,2	cyclictest	2906505	-21	kworker/u16:2+events_unbound	07:40:10	6
2979460	99	23	21,2	cyclictest	3698000	-21	kworker/u16:4+events_unbound	12:31:06	6
2979460	99	23	21,2	cyclictest	3377324	-21	kworker/u16:5+events_unbound	10:57:27	6
2979460	99	23	21,2	cyclictest	3377324	-21	kworker/u16:5+events_unbound	10:57:27	6
2979460	99	23	21,2	cyclictest	3225599	-21	kworker/u16:2+events_unbound	09:23:47	6
2979460	99	23	21,2	cyclictest	2906505	-21	kworker/u16:2+events_unbound	08:09:41	6
2979460	99	23	21,2	cyclictest	2906505	-21	kworker/u16:2+events_unbound	07:28:13	6
2979460	99	23	21,2	cyclictest	2906505	-21	kworker/u16:2+events_unbound	07:11:38	6
2979457	99	23	21,2	cyclictest	3090171	-21	kworker/u16:1+flush-8:0	09:05:05	5
2979457	99	23	20,3	cyclictest	3275642	-21	kworker/u16:1+flush-8:0	09:40:07	5
2979457	99	23	20,2	cyclictest	3599379	-21	kworker/u16:2+flush-8:0	12:05:07	5
2979463	99	22	17,4	cyclictest	648	-21	systemd-journal	11:29:44	7
2979460	99	22	20,2	cyclictest	3158173	-21	kworker/u16:0+events_unbound	08:53:57	6
2979460	99	22	20,2	cyclictest	3119238	-21	kworker/u16:0+events_unbound	08:23:08	6
2979460	99	22	20,2	cyclictest	3090171	-21	kworker/u16:1+events_unbound	08:27:53	6
2979460	99	22	20,2	cyclictest	2989350	-21	kworker/u16:1+events_unbound	07:22:49	6
2979454	99	22	18,3	cyclictest	3302868	-21	latency_hist	09:44:50	4
2979463	99	21	19,1	cyclictest	0	-21	swapper/7	11:34:49	7
2979460	99	21	19,2	cyclictest	3414399	-21	kworker/u16:1+events_unbound	11:17:27	6
2979460	99	21	19,2	cyclictest	3100203	-21	kworker/u16:3+events_unbound	08:11:13	6
2979457	99	21	19,2	cyclictest	3698000	-21	kworker/u16:4+events_unbound	12:25:04	5
2979463	99	20	0,18	cyclictest	6561	-21	fwupd	08:18:44	7
2979460	99	20	18,2	cyclictest	3225599	-21	kworker/u16:2+events_unbound	09:15:56	6
2979460	99	20	18,2	cyclictest	3197010	-21	kworker/u16:3+events_unbound	09:30:51	6
2979457	99	20	18,2	cyclictest	3537731	-21	kworker/u16:4+flush-8:0	11:25:15	5
2979457	99	20	18,2	cyclictest	3275642	-21	kworker/u16:1+events_unbound	10:05:03	5
2979457	99	20	18,2	cyclictest	3158173	-21	kworker/u16:0+flush-8:0	11:39:50	5
2979457	99	20	17,2	cyclictest	3365152	-21	kworker/u16:4+events_unbound	10:25:03	5
2979454	99	20	17,2	cyclictest	3377324	-21	kworker/u16:5+flush-8:0	10:39:59	4
2979460	99	19	17,2	cyclictest	3158173	-21	kworker/u16:0+events_unbound	09:09:13	6
2979460	99	19	17,2	cyclictest	3139187	-21	kworker/u16:2+events_unbound	08:56:37	6
2979460	99	19	17,2	cyclictest	3139187	-21	kworker/u16:2+events_unbound	08:56:37	6
2979457	99	19	17,2	cyclictest	3275642	-21	kworker/u16:1+events_unbound	09:45:13	5
2979463	99	18	0,17	cyclictest	0	-21	swapper/7	10:00:13	7
2979460	99	18	16,2	cyclictest	3537730	-21	kworker/u16:3+flush-8:0	11:35:41	6
2979457	99	18	16,2	cyclictest	3414399	-21	kworker/u16:1+events_unbound	11:15:11	5
2979463	99	17	15,1	cyclictest	0	-21	swapper/7	11:00:13	7
2979463	99	17	15,1	cyclictest	0	-21	swapper/7	11:00:13	7
2979457	99	17	15,2	cyclictest	3658758	-21	kworker/u16:3+flush-8:0	12:19:48	5
2979457	99	17	15,2	cyclictest	3275642	-21	kworker/u16:1+flush-8:0	09:55:16	5
2979457	99	17	15,2	cyclictest	2989350	-21	kworker/u16:1+flush-8:0	07:30:15	5
2979454	99	17	10,6	cyclictest	3327640	-21	latency_hist	09:54:49	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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