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 Aug 21, 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
3609462	2	69	0,1	sleep5	0	-21	swapper/5	11:22:53	5
3034145	99	55	53,2	cyclictest	3589310	-21	kworker/u16:1+events_unbound	12:33:01	4
3033695	2	51	40,7	sleep5	0	-21	swapper/5	07:05:22	5
3034145	99	50	48,2	cyclictest	3504175	-21	kworker/u16:4+events_unbound	10:52:59	4
3034145	99	50	48,2	cyclictest	3504175	-21	kworker/u16:4+events_unbound	10:52:59	4
3034145	99	48	46,2	cyclictest	3685703	-21	kworker/u16:3+flush-8:0	12:08:01	4
3034145	99	47	45,2	cyclictest	2331338	-21	kworker/u16:4+events_unbound	07:12:45	4
3034145	99	44	42,2	cyclictest	3447292	-21	kworker/u16:1+events_unbound	10:22:58	4
3034145	99	44	42,2	cyclictest	3154594	-21	kworker/u16:2+flush-8:0	08:12:46	4
3034145	99	44	42,2	cyclictest	3057444	-21	kworker/u16:5+events_unbound	07:27:51	4
3034145	99	43	40,2	cyclictest	3203524	-21	kworker/u16:3+events_unbound	08:42:46	4
3034145	99	41	39,2	cyclictest	3096186	-21	kworker/u16:3+events_unbound	07:47:51	4
3033795	2	41	3,33	sleep7	0	-21	swapper/7	07:06:45	7
3034154	99	40	35,4	cyclictest	3320475	-21	latency_hist	09:27:30	7
3034145	99	40	38,2	cyclictest	3464980	-21	kworker/u16:2+events_unbound	10:27:33	4
3033675	2	40	29,8	sleep4	0	-21	swapper/4	07:05:05	4
3034145	99	39	37,2	cyclictest	3563645	-21	kworker/u16:0+events_unbound	11:32:44	4
3034145	99	39	37,2	cyclictest	3096186	-21	kworker/u16:3+events_unbound	07:37:51	4
3034145	99	38	36,2	cyclictest	3589310	-21	kworker/u16:1+events_unbound	11:22:57	4
3034145	99	38	36,2	cyclictest	3464980	-21	kworker/u16:2+events_unbound	10:37:57	4
3034154	99	37	32,4	cyclictest	3467237	-21	latency_hist	10:27:30	7
3034145	99	37	35,2	cyclictest	3685703	-21	kworker/u16:3+events_unbound	12:19:22	4
3034145	99	37	35,2	cyclictest	3367534	-21	kworker/u16:1+events_unbound	09:52:34	4
3034145	99	37	34,2	cyclictest	3367534	-21	kworker/u16:1+events_unbound	09:57:33	4
3034152	99	36	34,2	cyclictest	3589310	-21	kworker/u16:1+flush-8:0	11:17:53	6
3034145	99	36	34,2	cyclictest	3308341	-21	kworker/u16:4+events_unbound	09:27:59	4
3034145	99	36	34,2	cyclictest	3096186	-21	kworker/u16:3+flush-8:0	08:23:02	4
3034145	99	35	33,2	cyclictest	3685703	-21	kworker/u16:3+flush-8:0	12:13:04	4
3034145	99	35	33,2	cyclictest	3589310	-21	kworker/u16:1+events_unbound	12:03:58	4
3034145	99	35	33,2	cyclictest	3589310	-21	kworker/u16:1+events_unbound	11:45:02	4
3034145	99	35	33,2	cyclictest	3589310	-21	kworker/u16:1+events_unbound	11:21:49	4
3034145	99	35	33,2	cyclictest	3170335	-21	kworker/u16:4+events_unbound	08:37:45	4
3034145	99	34	32,2	cyclictest	3538543	-21	kworker/u16:3+events_unbound	11:05:22	4
3034145	99	34	32,2	cyclictest	3464980	-21	kworker/u16:2+events_unbound	10:50:21	4
3034145	99	34	32,2	cyclictest	3430649	-21	kworker/u16:3+flush-8:0	10:32:49	4
3034145	99	34	32,2	cyclictest	3306326	-21	kworker/u16:2+events_unbound	09:45:46	4
3034145	99	34	32,2	cyclictest	3261908	-21	kworker/u16:1+events_unbound	09:13:45	4
3034145	99	34	31,2	cyclictest	3589310	-21	kworker/u16:1+events_unbound	11:52:42	4
3034145	99	34	31,2	cyclictest	3293579	-21	kworker/u16:3+events_unbound	09:41:22	4
3034145	99	33	31,2	cyclictest	3563645	-21	kworker/u16:0+events_unbound	11:59:52	4
3034145	99	33	31,2	cyclictest	3563645	-21	kworker/u16:0+events_unbound	11:30:33	4
3034145	99	33	31,2	cyclictest	3393980	-21	kworker/u16:2+events_unbound	10:16:58	4
3034145	99	33	31,2	cyclictest	3393980	-21	kworker/u16:2+events_unbound	10:05:42	4
3034145	99	33	31,2	cyclictest	3367534	-21	kworker/u16:1+flush-8:0	09:47:44	4
3033794	2	33	23,7	sleep6	0	-21	swapper/6	07:06:44	6
3034145	99	32	30,2	cyclictest	3758950	-21	kworker/u16:0+flush-8:0	12:29:01	4
3034145	99	32	30,2	cyclictest	3538020	-21	kworker/u16:1+events_unbound	11:01:31	4
3034145	99	32	30,2	cyclictest	3367534	-21	kworker/u16:1+events_unbound	10:10:02	4
3034145	99	32	30,2	cyclictest	3261908	-21	kworker/u16:1+events_unbound	09:07:57	4
3034154	99	31	25,4	cyclictest	3565464	-21	date	11:07:30	7
3034149	99	31	27,3	cyclictest	2331338	-21	kworker/u16:4+events_unbound	07:07:44	5
3034145	99	31	29,2	cyclictest	3672871	-21	kworker/u16:2+events_unbound	11:51:02	4
3034145	99	31	29,2	cyclictest	3563645	-21	kworker/u16:0+flush-8:0	11:39:01	4
3034145	99	31	29,2	cyclictest	3491385	-21	kworker/u16:0+events_unbound	10:44:22	4
3034145	99	31	29,2	cyclictest	3430649	-21	kworker/u16:3+events_unbound	10:20:25	4
3034145	99	31	29,2	cyclictest	3306326	-21	kworker/u16:2+events_unbound	09:19:29	4
3034145	99	31	29,2	cyclictest	3261908	-21	kworker/u16:1+events_unbound	09:27:14	4
3034145	99	30	28,2	cyclictest	3698851	-21	kworker/u16:2+events_unbound	12:27:17	4
3034145	99	30	28,2	cyclictest	3563645	-21	kworker/u16:0+events_unbound	11:10:50	4
3034145	99	30	27,2	cyclictest	3154594	-21	kworker/u16:2+events_unbound	08:52:44	4
3034154	99	29	26,2	cyclictest	3252232	-21	wc	08:57:30	7
3034145	99	29	27,2	cyclictest	3538543	-21	kworker/u16:3+flush-8:0	11:12:58	4
3034145	99	29	27,2	cyclictest	3154594	-21	kworker/u16:2+flush-8:0	08:17:56	4
3034145	99	29	27,2	cyclictest	3057419	-21	kworker/u16:2+events_unbound	07:42:43	4
3034145	99	29	26,2	cyclictest	3154594	-21	kworker/u16:2+events_unbound	08:27:45	4
3034145	99	28	26,2	cyclictest	3293579	-21	kworker/u16:3+events_unbound	09:35:09	4
3034145	99	28	26,2	cyclictest	3293579	-21	kworker/u16:3+events_unbound	09:35:09	4
3034154	99	27	25,1	cyclictest	3288677	-21	kthreadcore	09:12:52	7
3034145	99	27	24,2	cyclictest	3057419	-21	kworker/u16:2+flush-8:0	07:32:45	4
3635504	2	26	0,1	chrt	3635506	-21	ssh	11:32:57	7
3034152	99	26	24,2	cyclictest	3563645	-21	kworker/u16:0+flush-8:0	11:43:12	6
3034145	99	26	24,2	cyclictest	3170335	-21	kworker/u16:4+events_unbound	08:32:38	4
3034145	99	26	23,2	cyclictest	3154594	-21	kworker/u16:2+events_unbound	08:47:45	4
3034154	99	25	0,23	cyclictest	108	-21	kcompactd0	11:37:30	7
3034145	99	25	23,2	cyclictest	3067447	-21	kworker/u16:1+flush-8:0	07:22:59	4
3034154	99	24	19,4	cyclictest	648	-21	systemd-journal	08:32:31	7
3034154	99	24	0,22	cyclictest	3540838	-21	latency_hist	10:57:30	7
3034154	99	24	0,22	cyclictest	3540838	-21	latency_hist	10:57:30	7
3034145	99	24	21,2	cyclictest	3024180	-21	kworker/u16:3+events_unbound	07:07:38	4
3180125	2	23	0,1	chrt	0	-21	swapper/6	08:17:50	6
3034145	99	23	21,2	cyclictest	3096186	-21	kworker/u16:3+events_unbound	07:52:56	4
3034154	99	22	0,21	cyclictest	3145121	-21	latency_hist	08:02:30	7
3034145	99	22	20,2	cyclictest	3154594	-21	kworker/u16:2+events_unbound	08:07:45	4
3034145	99	22	20,2	cyclictest	3024180	-21	kworker/u16:3+events_unbound	07:21:03	4
3034154	99	21	20,0	cyclictest	0	-21	swapper/7	07:07:46	7
3034154	99	21	16,3	cyclictest	3577602	-21	sed	11:12:30	7
3034145	99	21	19,2	cyclictest	3125527	-21	kworker/u16:1+events_unbound	07:59:27	4
3034154	99	20	14,5	cyclictest	3242394	-21	latency_hist	08:52:30	7
3034152	99	20	18,2	cyclictest	3758950	-21	kworker/u16:0+flush-8:0	12:27:30	6
3034154	99	19	15,3	cyclictest	125	-21	kswapd0	12:32:57	7
3034152	99	19	16,3	cyclictest	3538543	-21	kworker/u16:3+flush-8:0	11:07:30	6
3034149	99	19	17,2	cyclictest	3464980	-21	kworker/u16:2+events_unbound	10:28:51	5
3034152	99	18	16,2	cyclictest	3538543	-21	kworker/u16:3+flush-8:0	11:12:41	6
3034145	99	18	16,2	cyclictest	3135798	-21	kworker/u16:0+flush-8:0	08:02:51	4
3034154	99	17	14,2	cyclictest	3448730	-21	tr	10:17:52	7
3034152	99	16	14,2	cyclictest	3306326	-21	kworker/u16:2+flush-8:0	09:22:31	6
3034149	99	16	14,2	cyclictest	3685703	-21	kworker/u16:3+flush-8:0	12:22:30	5
3034149	99	16	13,2	cyclictest	3409681	-21	kworker/u16:0+flush-8:0	10:12:31	5
3034149	99	16	0,1	cyclictest	0	-21	swapper/5	09:47:50	5
3034154	99	15	13,1	cyclictest	0	-21	swapper/7	10:27:51	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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