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 16, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3821391	2	97	0,1	sleep7	3821393	-21	date	23:34:55	7
3236163	2	58	35,7	sleep4	0	-21	swapper/4	19:08:41	4
3236530	99	49	46,2	cyclictest	3403017	-21	kworker/u16:1+events_unbound	20:40:09	5
3236530	99	43	40,2	cyclictest	3235958	-21	kworker/u16:2+flush-8:0	20:20:10	5
3236100	2	42	5,32	sleep7	0	-21	swapper/7	19:07:48	7
3794775	2	41	0,0	sleep7	3794776	-21	sh	23:20:28	7
3236535	99	41	38,2	cyclictest	3403552	-21	kworker/u16:2+events_unbound	20:34:57	6
3236535	99	40	38,2	cyclictest	3541702	-21	kworker/u16:1+events_unbound	22:25:08	6
3236535	99	39	37,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	21:50:25	6
3236535	99	38	36,2	cyclictest	3964330	-21	kworker/u16:3+events_unbound	00:34:52	6
3236539	99	36	30,5	cyclictest	3869819	-21	latency_hist	23:54:55	7
3236539	99	36	30,5	cyclictest	3259414	-21	latency_hist	19:19:56	7
3236535	99	36	33,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	21:54:58	6
3236535	99	36	30,6	cyclictest	3495238	-21	kworker/u16:0+events_unbound	22:06:48	6
3236530	99	36	33,2	cyclictest	3794055	-21	kworker/u16:0+flush-8:0	23:29:56	5
3236192	2	36	26,7	sleep6	0	-21	swapper/6	19:09:07	6
3236535	99	35	33,2	cyclictest	3855136	-21	kworker/u16:6+events_unbound	23:52:16	6
3236535	99	35	33,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	22:43:30	6
3236535	99	35	32,2	cyclictest	3422685	-21	kworker/u16:0+events_unbound	20:50:11	6
3236146	2	35	24,8	sleep5	0	-21	swapper/5	19:08:26	5
3236535	99	34	32,2	cyclictest	3870090	-21	kworker/u16:0+events_unbound	00:10:28	6
3236535	99	34	32,2	cyclictest	3541702	-21	kworker/u16:1+events_unbound	22:18:29	6
3236535	99	34	32,2	cyclictest	3403552	-21	kworker/u16:2+events_unbound	21:14:08	6
3236530	99	34	32,2	cyclictest	3891616	-21	kworker/u16:2+events_unbound	00:15:08	5
3236535	99	33	31,2	cyclictest	3891616	-21	kworker/u16:2+events_unbound	00:03:32	6
3236535	99	33	31,2	cyclictest	3870090	-21	kworker/u16:0+events_unbound	00:07:17	6
3236535	99	33	31,2	cyclictest	3794055	-21	kworker/u16:0+events_unbound	23:32:33	6
3236535	99	33	31,2	cyclictest	3676311	-21	kworker/u16:3+events_unbound	23:29:45	6
3236535	99	33	31,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	22:51:45	6
3236535	99	33	31,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	22:11:29	6
3236535	99	33	31,2	cyclictest	3541702	-21	kworker/u16:1+events_unbound	22:21:13	6
3236535	99	33	31,2	cyclictest	3541702	-21	kworker/u16:1+events_unbound	21:38:02	6
3236535	99	33	31,2	cyclictest	3529601	-21	kworker/u16:2+events_unbound	21:33:42	6
3236535	99	33	31,2	cyclictest	3516824	-21	kworker/u16:3+events_unbound	21:29:10	6
3236530	99	33	30,2	cyclictest	3818622	-21	kworker/u16:1+events_unbound	23:39:57	5
3236535	99	32	30,2	cyclictest	3833472	-21	kworker/u16:5+events_unbound	23:43:44	6
3236535	99	32	30,2	cyclictest	3818622	-21	kworker/u16:1+events_unbound	23:45:08	6
3236535	99	32	30,2	cyclictest	3676311	-21	kworker/u16:3+events_unbound	23:24:38	6
3236535	99	32	30,2	cyclictest	3640437	-21	kworker/u16:5+events_unbound	22:36:10	6
3236535	99	32	30,2	cyclictest	3591626	-21	kworker/u16:3+events_unbound	22:03:13	6
3236535	99	32	30,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	21:48:20	6
3236535	99	32	30,2	cyclictest	3346210	-21	kworker/u16:3+events_unbound	20:40:21	6
3236530	99	32	30,2	cyclictest	3676311	-21	kworker/u16:3+events_unbound	23:20:09	5
3236530	99	32	30,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	22:55:25	5
3236535	99	31	29,2	cyclictest	3891616	-21	kworker/u16:2+events_unbound	00:16:28	6
3236535	99	31	29,2	cyclictest	3676311	-21	kworker/u16:3+events_unbound	22:46:53	6
3236535	99	31	29,2	cyclictest	3640437	-21	kworker/u16:5+events_unbound	22:33:22	6
3236535	99	31	29,2	cyclictest	3640437	-21	kworker/u16:5+events_unbound	22:33:22	6
3236535	99	31	29,2	cyclictest	3495238	-21	kworker/u16:0+events_unbound	21:44:17	6
3236535	99	31	29,2	cyclictest	3461366	-21	kworker/u16:1+events_unbound	21:23:52	6
3236535	99	31	29,2	cyclictest	3422685	-21	kworker/u16:0+events_unbound	20:59:38	6
3236535	99	31	28,2	cyclictest	3346210	-21	kworker/u16:3+events_unbound	20:29:56	6
3236530	99	31	29,2	cyclictest	3235958	-21	kworker/u16:2+events_unbound	20:04:57	5
3236535	99	30	28,2	cyclictest	3891616	-21	kworker/u16:2+events_unbound	00:26:53	6
3236535	99	30	28,2	cyclictest	3760921	-21	kworker/u16:4+events_unbound	23:16:32	6
3236535	99	30	28,2	cyclictest	3676311	-21	kworker/u16:3+events_unbound	23:04:29	6
3236535	99	30	28,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	23:11:33	6
3236535	99	30	28,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	23:09:45	6
3236535	99	30	28,2	cyclictest	3235958	-21	kworker/u16:2+events_unbound	20:00:56	6
3236535	99	30	28,2	cyclictest	2522455	-21	kworker/u16:7+events_unbound	19:23:05	6
3236530	99	30	28,2	cyclictest	3891616	-21	kworker/u16:2+events_unbound	00:10:09	5
3236535	99	29	27,2	cyclictest	3403552	-21	kworker/u16:2+events_unbound	21:19:18	6
3236535	99	29	27,2	cyclictest	3346210	-21	kworker/u16:3+flush-8:0	20:25:15	6
3236535	99	29	27,2	cyclictest	3346210	-21	kworker/u16:3+flush-8:0	20:15:25	6
3236535	99	29	27,2	cyclictest	3235958	-21	kworker/u16:2+events_unbound	20:20:25	6
3236535	99	29	26,2	cyclictest	3346210	-21	kworker/u16:3+events_unbound	20:10:05	6
3236530	99	29	28,1	cyclictest	3870090	-21	kworker/u16:0+events_unbound	00:20:10	5
3672028	2	28	0,1	chrt	3672029	-21	kthreadcore	22:30:20	7
3672028	2	28	0,1	chrt	3672029	-21	kthreadcore	22:30:20	7
3236535	99	28	26,2	cyclictest	3891616	-21	kworker/u16:2+flush-8:0	00:39:36	6
3236535	99	28	26,2	cyclictest	3891616	-21	kworker/u16:2+flush-8:0	00:20:15	6
3236535	99	28	26,2	cyclictest	3833472	-21	kworker/u16:5+events_unbound	23:55:27	6
3236535	99	28	26,2	cyclictest	3833472	-21	kworker/u16:5+events_unbound	23:55:27	6
3236530	99	28	26,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	22:37:56	5
3236530	99	28	26,2	cyclictest	3529601	-21	kworker/u16:2+events_unbound	21:34:58	5
3236530	99	28	25,2	cyclictest	3891616	-21	kworker/u16:2+events_unbound	00:35:00	5
3236539	99	27	26,0	cyclictest	0	-21	swapper/7	22:27:40	7
3236539	99	27	24,1	cyclictest	3943737	-21	ssh	00:25:09	7
3236530	99	27	25,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	21:59:06	5
3236530	99	27	24,2	cyclictest	3235958	-21	kworker/u16:2+events_unbound	19:55:10	5
3236535	99	26	24,2	cyclictest	3676311	-21	kworker/u16:3+events_unbound	22:57:38	6
3236535	99	26	24,2	cyclictest	3403552	-21	kworker/u16:2+events_unbound	21:00:11	6
3236530	99	26	24,2	cyclictest	3855136	-21	kworker/u16:6+events_unbound	00:00:18	5
3236530	99	26	24,2	cyclictest	3833471	-21	kworker/u16:4+events_unbound	23:50:09	5
3236530	99	26	24,2	cyclictest	3557779	-21	kworker/u16:2+flush-8:0	23:09:27	5
3236530	99	26	24,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	22:30:17	5
3236530	99	26	24,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	22:30:17	5
3236530	99	26	24,2	cyclictest	3403552	-21	kworker/u16:2+events_unbound	21:10:13	5
3236530	99	26	24,2	cyclictest	2522455	-21	kworker/u16:7+events_unbound	19:24:51	5
3236539	99	25	23,1	cyclictest	3904024	-21	ssh	00:05:58	7
3236535	99	25	23,2	cyclictest	3557779	-21	kworker/u16:2+events_unbound	23:37:30	6
3236535	99	25	23,2	cyclictest	3235958	-21	kworker/u16:2+events_unbound	19:44:06	6
3236530	99	25	23,2	cyclictest	3794055	-21	kworker/u16:0+events_unbound	23:25:12	5
3236530	99	25	22,2	cyclictest	3461366	-21	kworker/u16:1+events_unbound	21:25:10	5
3236539	99	24	23,0	cyclictest	0	-21	swapper/7	21:09:18	7
3236539	99	24	23,0	cyclictest	0	-21	swapper/7	21:09:18	7
3236539	99	24	23,0	cyclictest	0	-21	swapper/7	20:32:57	7
3236535	99	24	22,2	cyclictest	3278715	-21	kworker/u16:0+events_unbound	19:55:20	6
3236530	99	24	22,2	cyclictest	3591626	-21	kworker/u16:3+events_unbound	22:08:04	5
3236530	99	24	22,2	cyclictest	3557779	-21	kworker/u16:2+flush-8:0	23:00:21	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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