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 Wed Jul 01, 2026 00:43:37)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2338783	2	62	52,7	sleep4	0	-21	swapper/4	19:09:02	4
2329472	2	53	19,29	sleep7	0	-21	swapper/7	19:04:16	7
2339089	99	46	40,5	cyclictest	2488369	-21	latency_hist	20:24:05	7
2339087	99	44	41,2	cyclictest	2792131	-21	kworker/u16:0+flush-8:0	23:49:05	6
2339089	99	43	42,0	cyclictest	0	-21	swapper/7	23:14:07	7
2338554	2	43	33,7	sleep5	0	-21	swapper/5	19:05:50	5
2339087	99	39	37,2	cyclictest	2792131	-21	kworker/u16:0+flush-8:0	23:38:59	6
2339082	99	39	36,2	cyclictest	2998006	-21	kworker/u16:2+events_unbound	00:21:07	5
2338689	2	39	28,8	sleep6	0	-21	swapper/6	19:07:44	6
2339082	99	38	36,2	cyclictest	2646122	-21	kworker/u16:2+events_unbound	23:14:23	5
2339089	99	37	35,1	cyclictest	2611360	-21	ssh	21:22:45	7
2339082	99	37	34,2	cyclictest	2646122	-21	kworker/u16:2+events_unbound	21:49:08	5
2339087	99	36	34,2	cyclictest	2536920	-21	kworker/u16:3+events_unbound	21:39:00	6
2339087	99	36	34,2	cyclictest	2536920	-21	kworker/u16:3+events_unbound	21:39:00	6
2339082	99	36	34,2	cyclictest	2792131	-21	kworker/u16:0+events_unbound	23:09:51	5
2339087	99	35	32,2	cyclictest	2998006	-21	kworker/u16:2+flush-8:0	00:14:05	6
2339082	99	35	33,2	cyclictest	2952403	-21	kworker/u16:3+events_unbound	23:59:04	5
2339082	99	35	33,2	cyclictest	2792131	-21	kworker/u16:0+events_unbound	22:37:15	5
2339089	99	34	32,1	cyclictest	2672081	-21	sh	21:47:36	7
2339089	99	34	32,1	cyclictest	2575645	-21	diskmemload	23:50:12	7
2339087	99	34	32,2	cyclictest	2646122	-21	kworker/u16:2+events_unbound	22:54:40	6
2339087	99	34	32,2	cyclictest	2646122	-21	kworker/u16:2+events_unbound	22:54:40	6
2339082	99	34	31,2	cyclictest	2536920	-21	kworker/u16:3+events_unbound	21:28:08	5
2339089	99	33	31,1	cyclictest	2575645	-21	diskmemload	21:35:08	7
2339089	99	33	31,1	cyclictest	2575645	-21	diskmemload	21:35:08	7
2339082	99	33	31,2	cyclictest	2998006	-21	kworker/u16:2+events_unbound	00:12:56	5
2339082	99	33	31,2	cyclictest	2624628	-21	kworker/u16:4+events_unbound	21:30:36	5
2339082	99	33	31,2	cyclictest	2448768	-21	kworker/u16:1+events_unbound	21:48:00	5
2339089	99	32	31,0	cyclictest	0	-21	swapper/7	00:37:08	7
2339089	99	32	30,1	cyclictest	2866724	-21	ssh	23:08:00	7
2339089	99	32	30,1	cyclictest	2732179	-21	ssh	22:11:29	7
2339089	99	32	30,1	cyclictest	0	-21	swapper/7	21:24:09	7
2339082	99	32	30,2	cyclictest	2792131	-21	kworker/u16:0+flush-8:0	22:43:15	5
2339082	99	32	30,2	cyclictest	2733986	-21	kworker/u16:4+events_unbound	23:07:15	5
2339082	99	32	30,2	cyclictest	2646122	-21	kworker/u16:2+events_unbound	23:19:12	5
2339082	99	32	30,2	cyclictest	2546980	-21	kworker/u16:2+flush-8:0	21:14:00	5
2339082	99	32	30,2	cyclictest	2448768	-21	kworker/u16:1+events_unbound	22:05:21	5
2339089	99	31	30,0	cyclictest	0	-21	swapper/7	22:01:21	7
2339089	99	31	30,0	cyclictest	0	-21	swapper/7	00:25:23	7
2339089	99	31	29,1	cyclictest	2829353	-21	ssh	22:51:09	7
2339089	99	31	29,1	cyclictest	2575645	-21	diskmemload	21:10:09	7
2339089	99	31	29,1	cyclictest	2575645	-21	diskmemload	00:00:32	7
2339089	99	31	28,2	cyclictest	3026758	-21	ssh	00:16:12	7
2339089	99	31	28,2	cyclictest	2963874	-21	ssh	23:48:01	7
2339089	99	31	28,2	cyclictest	2598638	-21	ssh	21:16:44	7
2339087	99	31	29,2	cyclictest	2733568	-21	kworker/u16:0+events_unbound	22:14:40	6
2339087	99	31	29,2	cyclictest	2733568	-21	kworker/u16:0+events_unbound	22:14:40	6
2339082	99	31	29,2	cyclictest	2877221	-21	kworker/u16:1+events_unbound	23:30:16	5
2339082	99	31	29,2	cyclictest	2792131	-21	kworker/u16:0+events_unbound	23:37:16	5
2339082	99	31	29,2	cyclictest	2733986	-21	kworker/u16:4+events_unbound	22:17:36	5
2339082	99	31	29,2	cyclictest	2733986	-21	kworker/u16:4+events_unbound	22:17:36	5
2339082	99	31	29,2	cyclictest	2646122	-21	kworker/u16:2+events_unbound	22:26:16	5
2339082	99	31	29,2	cyclictest	2536920	-21	kworker/u16:3+events_unbound	21:18:29	5
2339082	99	31	29,2	cyclictest	2448768	-21	kworker/u16:1+events_unbound	21:58:51	5
2339082	99	31	27,3	cyclictest	2646122	-21	kworker/u16:2+flush-8:0	22:04:05	5
2339089	99	30	29,0	cyclictest	0	-21	swapper/7	23:03:08	7
2339089	99	30	29,0	cyclictest	0	-21	swapper/7	22:56:16	7
2339089	99	30	29,0	cyclictest	0	-21	swapper/7	22:56:16	7
2339089	99	30	28,1	cyclictest	0	-21	swapper/7	22:21:39	7
2339089	99	30	25,4	cyclictest	2804748	-21	ssh	22:40:36	7
2339087	99	30	28,2	cyclictest	2646122	-21	kworker/u16:2+flush-8:0	21:39:44	6
2339082	99	30	28,2	cyclictest	2877221	-21	kworker/u16:1+events_unbound	23:41:23	5
2339082	99	30	28,2	cyclictest	2733986	-21	kworker/u16:4+events_unbound	22:20:15	5
2339089	99	29	28,0	cyclictest	0	-21	swapper/7	23:58:19	7
2339089	99	29	28,0	cyclictest	0	-21	swapper/7	23:24:07	7
2339089	99	29	28,0	cyclictest	0	-21	swapper/7	22:37:40	7
2339089	99	29	28,0	cyclictest	0	-21	swapper/7	21:40:52	7
2339089	99	29	28,0	cyclictest	0	-21	swapper/7	00:23:08	7
2339082	99	29	27,2	cyclictest	2792131	-21	kworker/u16:0+events_unbound	22:49:59	5
2339082	99	29	27,2	cyclictest	2391688	-21	kworker/u16:2+flush-8:0	20:04:05	5
2339089	99	28	27,0	cyclictest	0	-21	swapper/7	22:48:35	7
2339089	99	28	27,0	cyclictest	0	-21	swapper/7	21:52:24	7
2339089	99	28	27,0	cyclictest	0	-21	swapper/7	00:11:32	7
2339089	99	28	26,1	cyclictest	2938066	-21	ssh	23:35:08	7
2339089	99	28	26,1	cyclictest	0	-21	swapper/7	22:16:32	7
2339089	99	28	26,1	cyclictest	0	-21	swapper/7	22:16:32	7
2339089	99	28	25,2	cyclictest	2878670	-21	sh	23:12:41	7
2339089	99	28	25,2	cyclictest	2636195	-21	ssh	21:33:44	7
2339087	99	28	26,2	cyclictest	2536920	-21	kworker/u16:3+events_unbound	21:24:29	6
2339089	99	27	26,0	cyclictest	0	-21	swapper/7	23:31:05	7
2339089	99	27	26,0	cyclictest	0	-21	swapper/7	22:28:04	7
2339089	99	27	26,0	cyclictest	0	-21	swapper/7	00:31:52	7
2339089	99	27	25,1	cyclictest	2901548	-21	ssh	23:19:55	7
2339089	99	27	25,1	cyclictest	2380670	-21	ntp_states	19:24:31	7
2339089	99	27	22,4	cyclictest	2721450	-21	latency_hist	22:09:05	7
2339087	99	27	25,2	cyclictest	2952403	-21	kworker/u16:3+events_unbound	23:57:16	6
2339087	99	27	25,2	cyclictest	2877221	-21	kworker/u16:1+events_unbound	23:16:16	6
2339087	99	27	25,2	cyclictest	2536920	-21	kworker/u16:3+flush-8:0	22:09:36	6
2339087	99	27	25,2	cyclictest	2391688	-21	kworker/u16:2+events_unbound	20:44:04	6
2339082	99	27	25,2	cyclictest	2877221	-21	kworker/u16:1+events_unbound	23:24:52	5
2339089	99	26	25,0	cyclictest	0	-21	swapper/7	00:08:35	7
2339082	99	26	24,2	cyclictest	3052636	-21	kworker/u16:1+events_unbound	00:37:34	5
2339082	99	26	24,2	cyclictest	3052636	-21	kworker/u16:1+events_unbound	00:30:08	5
2339082	99	26	24,2	cyclictest	2998006	-21	kworker/u16:2+events_unbound	00:08:05	5
2339082	99	26	24,2	cyclictest	2998006	-21	kworker/u16:2+events_unbound	00:01:36	5
2339082	99	26	24,2	cyclictest	2877221	-21	kworker/u16:1+events_unbound	23:51:34	5
2339082	99	26	24,2	cyclictest	2792131	-21	kworker/u16:0+events_unbound	22:55:04	5
2339082	99	26	24,2	cyclictest	2792131	-21	kworker/u16:0+events_unbound	22:55:04	5
2339082	99	26	24,2	cyclictest	2733986	-21	kworker/u16:4+events_unbound	23:00:03	5
2339082	99	26	24,2	cyclictest	2646122	-21	kworker/u16:2+events_unbound	22:45:00	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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