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 Sep 11, 2026 00:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2725822	2	69	0,0	sleep5	0	-21	swapper/5	21:34:41	5
2428702	2	57	45,8	sleep4	0	-21	swapper/4	19:08:10	4
2419280	2	55	19,30	sleep7	0	-21	swapper/7	19:05:00	7
2428672	2	45	34,8	sleep6	0	-21	swapper/6	19:07:48	6
2429116	99	41	36,4	cyclictest	3176141	-21	latency_hist	00:39:58	7
2428798	2	39	28,8	sleep5	0	-21	swapper/5	19:09:31	5
2429116	99	33	28,4	cyclictest	3115201	-21	latency_hist	00:14:59	7
2429116	99	32	31,0	cyclictest	0	-21	swapper/7	23:32:26	7
2429116	99	32	31,0	cyclictest	0	-21	swapper/7	21:17:06	7
2429116	99	31	30,0	cyclictest	0	-21	swapper/7	00:23:17	7
2429116	99	31	25,5	cyclictest	645	-21	systemd-journal	22:24:58	7
2429116	99	30	27,2	cyclictest	2954916	-21	ssh	23:06:02	7
2429116	99	30	24,5	cyclictest	645	-21	systemd-journal	00:19:57	7
2429110	99	29	27,2	cyclictest	2635765	-21	kworker/u16:5+events_unbound	22:30:54	5
3015753	2	28	0,0	chrt	0	-21	swapper/5	23:31:09	5
2429116	99	28	27,0	cyclictest	0	-21	swapper/7	22:06:18	7
2429116	99	28	27,0	cyclictest	0	-21	swapper/7	21:56:33	7
2429116	99	28	27,0	cyclictest	0	-21	swapper/7	21:21:14	7
2429110	99	28	26,2	cyclictest	2775065	-21	kworker/u16:3+flush-8:0	23:42:33	5
2429116	99	27	26,0	cyclictest	0	-21	swapper/7	23:01:02	7
2429116	99	27	26,0	cyclictest	0	-21	swapper/7	00:06:26	7
2725912	2	26	0,1	chrt	2725913	-21	rm	21:34:51	7
2429116	99	26	25,0	cyclictest	0	-21	swapper/7	23:44:37	7
2429116	99	26	25,0	cyclictest	0	-21	swapper/7	22:59:13	7
2429116	99	26	24,1	cyclictest	2737839	-21	ssh	21:39:25	7
2429116	99	26	24,1	cyclictest	0	-21	swapper/7	21:26:33	7
2429114	99	26	22,3	cyclictest	2655655	-21	cat	21:04:59	6
2429110	99	26	24,2	cyclictest	2635765	-21	kworker/u16:5+flush-8:0	21:55:29	5
2429110	99	26	23,2	cyclictest	3113996	-21	kworker/u16:2+flush-8:0	00:15:04	5
2429116	99	25	24,0	cyclictest	0	-21	swapper/7	23:12:00	7
2429116	99	25	22,2	cyclictest	3089296	-21	sh	00:02:00	7
2429116	99	24	23,0	cyclictest	0	-21	swapper/7	23:16:13	7
2429116	99	24	23,0	cyclictest	0	-21	swapper/7	22:53:14	7
2429116	99	24	23,0	cyclictest	0	-21	swapper/7	22:38:55	7
2429116	99	24	23,0	cyclictest	0	-21	swapper/7	22:00:41	7
2429116	99	24	23,0	cyclictest	0	-21	swapper/7	00:31:32	7
2429116	99	24	22,1	cyclictest	2772862	-21	ssh	21:51:27	7
2429116	99	24	21,2	cyclictest	3151380	-21	ssh	00:29:19	7
2429114	99	24	20,3	cyclictest	2665608	-21	kworker/u16:2+flush-8:0	21:16:04	6
2429110	99	24	22,2	cyclictest	2835808	-21	kworker/u16:1+flush-8:0	00:07:33	5
2429110	99	24	22,2	cyclictest	2635765	-21	kworker/u16:5+flush-8:0	21:36:36	5
2429110	99	24	22,2	cyclictest	2613867	-21	kworker/u16:3+events_unbound	20:44:30	5
2429110	99	24	22,2	cyclictest	2613867	-21	kworker/u16:3+events_unbound	20:44:30	5
2429110	99	24	22,2	cyclictest	2471130	-21	kworker/u16:2+events_unbound	19:49:02	5
2429116	99	23	22,0	cyclictest	0	-21	swapper/7	22:26:01	7
2429116	99	23	22,0	cyclictest	0	-21	swapper/7	19:57:16	7
2429110	99	23	21,2	cyclictest	2835808	-21	kworker/u16:1+flush-8:0	22:52:02	5
2429116	99	22	21,0	cyclictest	0	-21	swapper/7	20:23:43	7
2429110	99	22	20,2	cyclictest	2665608	-21	kworker/u16:2+events_unbound	21:10:06	5
2429110	99	22	20,2	cyclictest	2549270	-21	kworker/u16:1+events_unbound	20:13:19	5
2429116	99	21	20,0	cyclictest	0	-21	swapper/7	23:49:44	7
2429116	99	21	20,0	cyclictest	0	-21	swapper/7	23:49:44	7
2429116	99	21	20,0	cyclictest	0	-21	swapper/7	22:47:56	7
2429116	99	21	20,0	cyclictest	0	-21	swapper/7	22:47:56	7
2429116	99	21	20,0	cyclictest	0	-21	swapper/7	22:14:29	7
2429116	99	21	20,0	cyclictest	0	-21	swapper/7	20:49:27	7
2429116	99	21	19,1	cyclictest	0	-21	swapper/7	22:40:44	7
2429116	99	21	19,1	cyclictest	0	-21	swapper/7	22:40:44	7
2429116	99	21	0,1	cyclictest	0	-21	swapper/7	22:30:21	7
2429110	99	21	19,2	cyclictest	2549270	-21	kworker/u16:1+events_unbound	20:38:34	5
2429110	99	21	19,2	cyclictest	2549270	-21	kworker/u16:1+events_unbound	20:38:34	5
2429110	99	21	19,2	cyclictest	2451082	-21	kworker/u16:0+events_unbound	20:32:34	5
2429116	99	20	19,0	cyclictest	0	-21	swapper/7	20:58:12	7
2429116	99	20	19,0	cyclictest	0	-21	swapper/7	20:03:55	7
2429116	99	20	18,1	cyclictest	0	-21	swapper/7	21:46:21	7
2429110	99	20	18,2	cyclictest	2626767	-21	kworker/u16:4+events_unbound	21:08:38	5
2429110	99	20	18,2	cyclictest	2471130	-21	kworker/u16:2+events_unbound	19:37:18	5
2429110	99	20	18,2	cyclictest	2451082	-21	kworker/u16:0+events_unbound	21:20:10	5
2429110	99	20	18,2	cyclictest	2451082	-21	kworker/u16:0+events_unbound	19:20:47	5
2429110	99	20	18,2	cyclictest	1747060	-21	kworker/u16:4+flush-8:0	19:53:06	5
2429116	99	19	18,0	cyclictest	0	-21	swapper/7	20:30:28	7
2429116	99	19	18,0	cyclictest	0	-21	swapper/7	19:31:03	7
2429110	99	19	17,2	cyclictest	2626767	-21	kworker/u16:4+events_unbound	20:54:14	5
2429110	99	19	17,2	cyclictest	2549270	-21	kworker/u16:1+events_unbound	20:48:18	5
2429110	99	19	17,2	cyclictest	2471130	-21	kworker/u16:2+events_unbound	19:34:38	5
2429110	99	19	16,2	cyclictest	2726327	-21	kworker/u16:2+flush-8:0	21:40:18	5
2429116	99	18	17,0	cyclictest	0	-21	swapper/7	20:51:47	7
2429116	99	18	17,0	cyclictest	0	-21	swapper/7	20:18:42	7
2429116	99	18	17,0	cyclictest	0	-21	swapper/7	20:13:04	7
2429116	99	18	17,0	cyclictest	0	-21	swapper/7	19:46:11	7
2429114	99	18	0,14	cyclictest	0	-21	swapper/6	22:38:02	6
2429110	99	18	16,2	cyclictest	2775065	-21	kworker/u16:3+flush-8:0	23:49:12	5
2429110	99	18	16,2	cyclictest	2775065	-21	kworker/u16:3+flush-8:0	23:49:12	5
2429110	99	18	16,2	cyclictest	2775065	-21	kworker/u16:3+events_unbound	22:24:53	5
2429110	99	18	16,2	cyclictest	2775064	-21	kworker/u16:0+events_unbound	22:10:04	5
2429110	99	18	16,2	cyclictest	2549270	-21	kworker/u16:1+events_unbound	20:19:46	5
2429116	99	17	16,0	cyclictest	0	-21	swapper/7	21:07:57	7
2429116	99	17	16,0	cyclictest	0	-21	swapper/7	20:37:47	7
2429116	99	17	16,0	cyclictest	0	-21	swapper/7	20:37:47	7
2429116	99	17	16,0	cyclictest	0	-21	swapper/7	19:16:55	7
2429116	99	17	14,2	cyclictest	0	-21	swapper/7	19:41:50	7
2429116	99	17	10,5	cyclictest	645	-21	systemd-journal	21:14:58	7
2429114	99	17	13,3	cyclictest	2896428	-21	cat	22:44:58	6
2429114	99	17	13,3	cyclictest	2896428	-21	cat	22:44:58	6
2429110	99	17	15,2	cyclictest	2775065	-21	kworker/u16:3+events_unbound	00:13:21	5
2429110	99	17	15,2	cyclictest	2549270	-21	kworker/u16:1+events_unbound	20:21:14	5
2429110	99	17	15,2	cyclictest	2451082	-21	kworker/u16:0+flush-8:0	20:56:30	5
2429110	99	17	15,2	cyclictest	2451082	-21	kworker/u16:0+events_unbound	20:25:34	5
2429110	99	17	13,3	cyclictest	3070414	-21	kthreadcore	23:55:18	5
2429108	99	17	10,6	cyclictest	2548891	-21	latency_hist	20:09:59	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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