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 Sat Dec 27, 2025 00:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3879463	2	91	0,1	sleep6	0	-21	swapper/6	00:04:01	6
3879463	2	91	0,1	sleep6	0	-21	swapper/6	00:04:01	6
3304727	2	54	43,8	sleep4	0	-21	swapper/4	19:05:22	4
3301717	2	47	31,11	sleep5	0	-21	swapper/5	19:04:26	5
3305288	99	42	36,5	cyclictest	3550461	-21	latency_hist	21:14:02	7
3304747	2	41	17,8	sleep6	0	-21	swapper/6	19:05:40	6
3305288	99	39	33,5	cyclictest	3850296	-21	latency_hist	23:49:01	7
3296949	2	39	2,31	sleep7	0	-21	swapper/7	19:04:20	7
3305282	99	37	34,2	cyclictest	3357422	-21	kworker/u16:1+events_unbound	19:34:04	5
3305282	99	35	32,2	cyclictest	3357422	-21	kworker/u16:1+events_unbound	19:44:04	5
3305282	99	34	32,2	cyclictest	3545050	-21	kworker/u16:3+events_unbound	22:49:20	5
3305282	99	32	30,2	cyclictest	3357422	-21	kworker/u16:1+events_unbound	19:53:21	5
3305282	99	31	29,2	cyclictest	3571484	-21	kworker/u16:1+events_unbound	21:32:53	5
3305282	99	31	29,2	cyclictest	3305043	-21	kworker/u16:0+flush-8:0	20:04:24	5
3305282	99	31	29,2	cyclictest	3305043	-21	kworker/u16:0+flush-8:0	20:04:24	5
3305282	99	30	28,2	cyclictest	3897759	-21	kworker/u16:3+events_unbound	00:21:11	5
3305282	99	30	28,2	cyclictest	3666546	-21	kworker/u16:0+events_unbound	22:48:21	5
3305282	99	30	28,2	cyclictest	3545050	-21	kworker/u16:3+flush-8:0	23:42:20	5
3557566	2	29	0,1	chrt	0	-21	swapper/5	21:14:22	5
3305288	99	29	28,0	cyclictest	0	-21	swapper/7	00:09:11	7
3305288	99	29	27,1	cyclictest	3724582	-21	perf	22:44:01	7
3305288	99	29	0,27	cyclictest	902	-21	dbus-daemon	19:44:02	7
3305288	99	29	0,27	cyclictest	3881844	-21	grep	00:04:20	7
3305282	99	29	27,2	cyclictest	3695722	-21	kworker/u16:2+events_unbound	23:25:12	5
3305282	99	29	26,2	cyclictest	3571484	-21	kworker/u16:1+events_unbound	21:54:09	5
3305274	99	29	27,2	cyclictest	3376594	-21	kworker/u16:3+events_unbound	20:39:01	4
3305282	99	28	26,2	cyclictest	3897759	-21	kworker/u16:3+events_unbound	00:13:20	5
3305282	99	28	26,2	cyclictest	3590742	-21	kworker/u16:2+events_unbound	21:46:11	5
3305282	99	28	26,2	cyclictest	3571484	-21	kworker/u16:1+events_unbound	21:26:52	5
3305274	99	28	25,2	cyclictest	3865368	-21	kworker/u16:0+events_unbound	00:19:14	4
3305288	99	27	24,2	cyclictest	3598743	-21	munin-run	21:39:01	7
3305282	99	27	25,2	cyclictest	3734242	-21	kworker/u16:1+events_unbound	22:58:13	5
3305282	99	27	25,2	cyclictest	3545050	-21	kworker/u16:3+events_unbound	23:55:13	5
3305282	99	26	24,2	cyclictest	3695722	-21	kworker/u16:2+events_unbound	23:45:21	5
3305282	99	26	24,2	cyclictest	3376594	-21	kworker/u16:3+events_unbound	20:57:21	5
3305288	99	25	24,0	cyclictest	0	-21	swapper/7	22:49:04	7
3305282	99	25	23,2	cyclictest	3865368	-21	kworker/u16:0+events_unbound	00:34:19	5
3305282	99	25	23,2	cyclictest	3545050	-21	kworker/u16:3+events_unbound	23:12:12	5
3305282	99	25	23,2	cyclictest	3521726	-21	kworker/u16:1+events_unbound	21:08:12	5
3305282	99	25	23,2	cyclictest	3520412	-21	kworker/u16:0+events_unbound	21:10:52	5
3305282	99	25	23,2	cyclictest	3434785	-21	kworker/u16:2+events_unbound	20:20:52	5
3305282	99	25	23,2	cyclictest	3376594	-21	kworker/u16:3+flush-8:0	20:00:12	5
3305282	99	25	23,2	cyclictest	3376594	-21	kworker/u16:3+events_unbound	20:18:12	5
3305282	99	25	23,2	cyclictest	3305043	-21	kworker/u16:0+events_unbound	19:55:16	5
3305282	99	25	23,2	cyclictest	3293813	-21	kworker/u16:3+flush-8:0	19:09:12	5
3305282	99	25	22,2	cyclictest	3293813	-21	kworker/u16:3+events_unbound	19:19:09	5
3305288	99	24	23,0	cyclictest	0	-21	swapper/7	20:45:12	7
3305288	99	24	23,0	cyclictest	0	-21	swapper/7	19:57:04	7
3305288	99	24	23,0	cyclictest	0	-21	swapper/7	19:13:21	7
3305288	99	24	18,5	cyclictest	3492337	-21	latency_hist	20:44:01	7
3305282	99	24	22,2	cyclictest	3865368	-21	kworker/u16:0+events_unbound	00:16:55	5
3305282	99	24	22,2	cyclictest	3434785	-21	kworker/u16:2+events_unbound	20:59:32	5
3305282	99	24	22,2	cyclictest	3434785	-21	kworker/u16:2+events_unbound	20:43:13	5
3305282	99	24	22,2	cyclictest	3305043	-21	kworker/u16:0+events_unbound	20:11:12	5
3305282	99	24	22,2	cyclictest	3293813	-21	kworker/u16:3+events_unbound	19:14:49	5
3305282	99	24	21,2	cyclictest	3434785	-21	kworker/u16:2+events_unbound	20:24:04	5
3305274	99	24	21,2	cyclictest	3434785	-21	kworker/u16:2+flush-8:0	21:14:28	4
3305288	99	23	22,0	cyclictest	0	-21	swapper/7	23:29:31	7
3305288	99	23	22,0	cyclictest	0	-21	swapper/7	21:22:12	7
3305288	99	23	17,5	cyclictest	3782629	-21	latency_hist	23:14:01	7
3305282	99	23	21,2	cyclictest	3840650	-21	kworker/u16:4+events_unbound	00:04:36	5
3305282	99	23	21,2	cyclictest	3545050	-21	kworker/u16:3+events_unbound	22:08:12	5
3305282	99	23	21,2	cyclictest	3545050	-21	kworker/u16:3+events_unbound	21:43:13	5
3305282	99	23	21,2	cyclictest	3357422	-21	kworker/u16:1+events_unbound	19:41:12	5
3305282	99	23	20,2	cyclictest	3571484	-21	kworker/u16:1+events_unbound	21:59:08	5
3305288	99	22	21,0	cyclictest	0	-21	swapper/7	19:34:15	7
3305282	99	22	19,3	cyclictest	3293813	-21	kworker/u16:3+events_unbound	19:24:53	5
3305282	99	22	19,2	cyclictest	3752713	-21	kworker/u16:0+events_unbound	23:04:03	5
3305274	99	22	20,2	cyclictest	3357422	-21	kworker/u16:1+events_unbound	19:34:25	4
3305288	99	21	21,0	cyclictest	0	-21	swapper/7	22:13:44	7
3305288	99	21	20,0	cyclictest	0	-21	swapper/7	20:13:12	7
3305288	99	21	20,0	cyclictest	0	-21	swapper/7	00:37:20	7
3305288	99	21	20,0	cyclictest	0	-21	swapper/7	00:17:44	7
3305282	99	21	19,2	cyclictest	3695722	-21	kworker/u16:2+flush-8:0	23:01:12	5
3305282	99	21	19,2	cyclictest	3545050	-21	kworker/u16:3+flush-8:0	22:44:02	5
3305282	99	21	19,2	cyclictest	3376594	-21	kworker/u16:3+events_unbound	20:52:53	5
3305282	99	21	19,2	cyclictest	3376594	-21	kworker/u16:3+events_unbound	20:35:16	5
3305274	99	21	19,2	cyclictest	3590742	-21	kworker/u16:2+flush-8:0	21:44:28	4
3305274	99	21	19,2	cyclictest	3357422	-21	kworker/u16:1+events_unbound	19:54:14	4
3305288	99	20	19,0	cyclictest	0	-21	swapper/7	23:37:11	7
3305288	99	20	19,0	cyclictest	0	-21	swapper/7	23:23:12	7
3305288	99	20	19,0	cyclictest	0	-21	swapper/7	19:50:13	7
3305288	99	20	19,0	cyclictest	0	-21	swapper/7	19:25:24	7
3305288	99	20	19,0	cyclictest	0	-21	swapper/7	00:25:39	7
3305282	99	20	18,2	cyclictest	3695722	-21	kworker/u16:2+events_unbound	22:39:00	5
3305282	99	20	18,2	cyclictest	3571484	-21	kworker/u16:1+flush-8:0	21:37:20	5
3305282	99	20	18,2	cyclictest	3571484	-21	kworker/u16:1+events_unbound	22:16:24	5
3305288	99	19	18,0	cyclictest	0	-21	swapper/7	22:54:04	7
3305288	99	19	18,0	cyclictest	0	-21	swapper/7	20:55:16	7
3305288	99	19	18,0	cyclictest	0	-21	swapper/7	19:47:04	7
3305288	99	19	0,17	cyclictest	3540738	-21	perf	21:09:01	7
3305288	99	19	0,17	cyclictest	0	-21	swapper/7	22:24:25	7
3305288	99	19	0,17	cyclictest	0	-21	swapper/7	22:24:25	7
3305282	99	19	17,2	cyclictest	3928086	-21	kworker/u16:3+flush-8:0	00:30:27	5
3305282	99	19	17,2	cyclictest	3545050	-21	kworker/u16:3+events_unbound	21:23:09	5
3305274	99	19	17,2	cyclictest	3928086	-21	kworker/u16:3+flush-8:0	00:39:01	4
3305288	99	18	8,9	cyclictest	0	-21	swapper/7	19:19:20	7
3305288	99	18	17,0	cyclictest	0	-21	swapper/7	20:05:16	7
3305288	99	18	17,0	cyclictest	0	-21	swapper/7	20:05:16	7
3305288	99	18	16,1	cyclictest	0	-21	swapper/7	20:19:22	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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