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 May 03, 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
270557	2	57	47,7	sleep5	0	-21	swapper/5	19:04:39	5
270854	2	56	45,8	sleep4	0	-21	swapper/4	19:08:47	4
271147	99	47	44,2	cyclictest	733972	-21	kworker/u16:4+events_unbound	23:08:47	4
271158	99	44	43,0	cyclictest	0	-21	swapper/7	22:04:21	7
271158	99	44	39,4	cyclictest	601161	-21	latency_hist	21:48:47	7
270771	2	43	2,36	sleep7	0	-21	swapper/7	19:07:38	7
271158	99	38	33,3	cyclictest	610203	-21	ntpq	21:49:13	7
271158	99	34	33,0	cyclictest	0	-21	swapper/7	21:28:45	7
271158	99	34	32,1	cyclictest	0	-21	swapper/7	21:21:01	7
271153	99	34	32,2	cyclictest	888046	-21	kworker/u16:1+flush-8:0	00:03:47	6
271152	99	34	32,2	cyclictest	187891	-21	kworker/u16:2+events_unbound	19:24:02	5
271147	99	34	31,2	cyclictest	217282	-21	kworker/u16:3+flush-8:0	19:43:48	4
271158	99	33	32,0	cyclictest	0	-21	swapper/7	22:43:50	7
271158	99	33	31,1	cyclictest	504802	-21	diskmemload	22:36:46	7
271158	99	33	31,1	cyclictest	504802	-21	diskmemload	22:36:46	7
271158	99	32	31,0	cyclictest	0	-21	swapper/7	19:13:49	7
271158	99	32	30,1	cyclictest	671581	-21	ssh	22:15:02	7
271158	99	32	27,4	cyclictest	914541	-21	latency_hist	23:58:47	7
271158	99	32	27,4	cyclictest	914541	-21	latency_hist	23:58:47	7
271153	99	32	28,3	cyclictest	938773	-21	kworker/u16:5+flush-8:0	00:28:47	6
271158	99	31	30,0	cyclictest	0	-21	swapper/7	21:09:02	7
271158	99	31	29,1	cyclictest	0	-21	swapper/7	23:26:05	7
271158	99	31	0,29	cyclictest	890415	-21	latency_hist	23:48:48	7
271158	99	30	29,0	cyclictest	0	-21	swapper/7	23:50:09	7
271158	99	30	27,2	cyclictest	961941	-21	ssh	00:17:01	7
271152	99	30	27,2	cyclictest	328920	-21	kworker/u16:4+flush-8:0	19:53:49	5
271158	99	29	28,0	cyclictest	0	-21	swapper/7	21:59:48	7
271158	99	29	28,0	cyclictest	0	-21	swapper/7	00:08:57	7
271158	99	29	27,1	cyclictest	577028	-21	ssh	21:38:39	7
271158	99	29	27,1	cyclictest	0	-21	swapper/7	22:56:54	7
271152	99	29	27,2	cyclictest	904238	-21	kworker/u16:0+flush-8:0	00:14:03	5
271147	99	29	27,2	cyclictest	597797	-21	kworker/u16:2+flush-8:0	22:04:02	4
271158	99	28	27,0	cyclictest	0	-21	swapper/7	00:00:45	7
271158	99	28	26,1	cyclictest	0	-21	swapper/7	22:42:34	7
271158	99	28	26,1	cyclictest	0	-21	swapper/7	00:26:52	7
271153	99	28	26,2	cyclictest	456885	-21	kworker/u16:0+events_unbound	21:09:09	6
271152	99	28	26,2	cyclictest	866699	-21	kworker/u16:2+events_unbound	00:09:02	5
271147	99	28	27,1	cyclictest	597797	-21	kworker/u16:2+events_unbound	21:46:05	4
271147	99	28	24,3	cyclictest	733972	-21	kworker/u16:4+flush-8:0	00:18:52	4
271158	99	27	25,1	cyclictest	0	-21	swapper/7	21:15:22	7
271152	99	27	25,2	cyclictest	445013	-21	kworker/u16:3+flush-8:0	21:48:48	5
271152	99	27	25,2	cyclictest	418574	-21	kworker/u16:2+flush-8:0	20:41:05	5
271147	99	27	25,2	cyclictest	733972	-21	kworker/u16:4+flush-8:0	23:59:57	4
271147	99	27	25,2	cyclictest	456885	-21	kworker/u16:0+flush-8:0	21:09:45	4
270567	2	27	17,7	sleep6	0	-21	swapper/6	19:04:48	6
271158	99	26	25,0	cyclictest	0	-21	swapper/7	23:34:45	7
271158	99	26	25,0	cyclictest	0	-21	swapper/7	22:10:29	7
271158	99	26	25,0	cyclictest	0	-21	swapper/7	21:29:17	7
271153	99	26	24,2	cyclictest	904238	-21	kworker/u16:0+flush-8:0	00:18:47	6
271152	99	26	24,2	cyclictest	682581	-21	kworker/u16:0+events_unbound	22:29:14	5
271152	99	26	24,2	cyclictest	418574	-21	kworker/u16:2+events_unbound	20:51:06	5
271152	99	26	24,2	cyclictest	370975	-21	kworker/u16:1+events_unbound	20:15:18	5
271152	99	26	24,2	cyclictest	370975	-21	kworker/u16:1+events_unbound	20:07:41	5
271152	99	26	24,2	cyclictest	217282	-21	kworker/u16:3+events_unbound	20:12:34	5
271152	99	26	23,3	cyclictest	456885	-21	kworker/u16:0+flush-8:0	20:54:14	5
271152	99	26	23,2	cyclictest	682581	-21	kworker/u16:0+events_unbound	23:44:00	5
271147	99	26	24,2	cyclictest	830128	-21	kworker/u16:1+events_unbound	23:28:47	4
271147	99	26	24,2	cyclictest	613324	-21	kworker/u16:4+events_unbound	22:18:45	4
271158	99	25	24,0	cyclictest	0	-21	swapper/7	23:17:54	7
271158	99	25	24,0	cyclictest	0	-21	swapper/7	23:17:54	7
271158	99	25	23,1	cyclictest	878037	-21	ssh	23:43:13	7
271158	99	25	23,1	cyclictest	697480	-21	ssh	22:28:21	7
271153	99	25	23,2	cyclictest	719611	-21	kworker/u16:3+flush-8:0	22:59:04	6
271153	99	25	23,2	cyclictest	597797	-21	kworker/u16:2+events_unbound	22:13:50	6
271153	99	25	23,2	cyclictest	353621	-21	kworker/u16:0+flush-8:0	20:28:47	6
271152	99	25	23,2	cyclictest	719611	-21	kworker/u16:3+flush-8:0	23:29:01	5
271152	99	25	23,2	cyclictest	187891	-21	kworker/u16:2+flush-8:0	19:35:33	5
271152	99	25	22,2	cyclictest	733972	-21	kworker/u16:4+events_unbound	23:13:54	5
271152	99	25	22,2	cyclictest	733972	-21	kworker/u16:4+events_unbound	23:13:54	5
271147	99	25	23,2	cyclictest	987123	-21	kworker/u16:0+events_unbound	00:31:58	4
271147	99	25	22,2	cyclictest	682581	-21	kworker/u16:0+events_unbound	23:44:05	4
271158	99	24	23,0	cyclictest	0	-21	swapper/7	22:59:38	7
271158	99	24	23,0	cyclictest	0	-21	swapper/7	00:32:28	7
271158	99	24	22,1	cyclictest	974303	-21	ssh	00:22:24	7
271158	99	24	22,1	cyclictest	0	-21	swapper/7	19:19:14	7
271152	99	24	22,2	cyclictest	938773	-21	kworker/u16:5+flush-8:0	00:34:02	5
271152	99	24	22,2	cyclictest	904238	-21	kworker/u16:0+events_unbound	23:56:42	5
271152	99	24	22,2	cyclictest	904238	-21	kworker/u16:0+events_unbound	23:56:42	5
271152	99	24	22,2	cyclictest	682581	-21	kworker/u16:0+events_unbound	23:41:35	5
271152	99	24	22,2	cyclictest	418574	-21	kworker/u16:2+flush-8:0	20:38:37	5
271152	99	24	22,2	cyclictest	418574	-21	kworker/u16:2+events_unbound	21:02:09	5
271152	99	24	22,2	cyclictest	370975	-21	kworker/u16:1+events_unbound	20:20:45	5
271152	99	24	22,2	cyclictest	370975	-21	kworker/u16:1+events_unbound	19:59:07	5
271152	99	24	22,2	cyclictest	208076	-21	kworker/u16:0+events_unbound	19:20:49	5
271147	99	24	21,2	cyclictest	530868	-21	kworker/u16:4+flush-8:0	21:34:03	4
271158	99	23	22,0	cyclictest	0	-21	swapper/7	23:19:17	7
271158	99	23	21,1	cyclictest	0	-21	swapper/7	23:07:21	7
271158	99	23	19,3	cyclictest	756648	-21	rm	22:51:16	7
271153	99	23	21,2	cyclictest	987583	-21	kworker/u16:1+events_unbound	00:34:09	6
271153	99	23	20,2	cyclictest	328920	-21	kworker/u16:4+flush-8:0	20:09:05	6
271152	99	23	21,2	cyclictest	682581	-21	kworker/u16:0+events_unbound	23:19:38	5
271152	99	23	20,3	cyclictest	733972	-21	kworker/u16:4+flush-8:0	22:49:13	5
271152	99	23	20,2	cyclictest	456885	-21	kworker/u16:0+events_unbound	21:03:48	5
271147	99	23	21,2	cyclictest	888046	-21	kworker/u16:1+flush-8:0	00:03:53	4
271147	99	23	21,2	cyclictest	418574	-21	kworker/u16:2+flush-8:0	20:39:04	4
271147	99	23	21,2	cyclictest	328920	-21	kworker/u16:4+events_unbound	20:14:57	4
271147	99	23	20,2	cyclictest	370975	-21	kworker/u16:1+events_unbound	19:59:01	4
271147	99	23	20,2	cyclictest	217282	-21	kworker/u16:3+flush-8:0	19:49:12	4
271158	99	22	21,0	cyclictest	0	-21	swapper/7	23:29:08	7
271158	99	22	21,0	cyclictest	0	-21	swapper/7	23:13:17	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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