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 Mon Feb 09, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3979538	2	61	35,8	sleep4	0	-21	swapper/4	07:05:56	4
3979362	2	58	48,7	sleep6	0	-21	swapper/6	07:03:26	6
3979843	99	49	45,3	cyclictest	650	-21	systemd-journal	08:26:01	7
3979841	99	49	45,3	cyclictest	35267	-21	kworker/u16:5+flush-8:0	09:26:02	6
3979843	99	43	0,41	cyclictest	380312	-21	latency_hist	11:36:02	7
3979841	99	43	40,2	cyclictest	2887	-21	kworker/u16:2+events_unbound	09:31:17	6
3979836	99	41	38,2	cyclictest	160536	-21	kworker/u16:1+flush-8:0	11:16:01	4
3979481	2	41	31,7	sleep5	0	-21	swapper/5	07:05:09	5
3979843	99	39	34,4	cyclictest	650	-21	systemd-journal	10:06:01	7
3979841	99	39	36,2	cyclictest	439376	-21	kworker/u16:2+flush-8:0	12:11:17	6
3970849	2	39	3,30	sleep7	0	-21	swapper/7	07:01:18	7
3979841	99	36	34,2	cyclictest	160536	-21	kworker/u16:1+events_unbound	10:21:17	6
3979836	99	35	32,3	cyclictest	3960260	-21	kworker/u16:2+flush-8:0	07:11:33	4
3979837	99	34	32,2	cyclictest	490617	-21	kworker/u16:1+flush-8:0	12:26:29	5
42999	2	33	0,1	chrt	43000	-21	kthreadcore	09:16:24	5
42999	2	33	0,1	chrt	43000	-21	kthreadcore	09:16:24	5
3979836	99	33	31,2	cyclictest	304383	-21	kworker/u16:3+flush-8:0	11:25:57	4
3979841	99	32	29,2	cyclictest	160536	-21	kworker/u16:1+events_unbound	10:11:15	6
3979836	99	32	30,2	cyclictest	366335	-21	kworker/u16:4+flush-8:0	12:31:17	4
3979843	99	31	29,1	cyclictest	451401	-21	ssh	12:01:36	7
3979843	99	30	29,0	cyclictest	0	-21	swapper/7	09:51:25	7
3979841	99	30	27,2	cyclictest	490617	-21	kworker/u16:1+events_unbound	12:31:16	6
3979843	99	28	27,0	cyclictest	0	-21	swapper/7	11:01:48	7
3979841	99	28	26,2	cyclictest	75857	-21	kworker/u16:1+flush-8:0	09:36:18	6
3979836	99	28	26,2	cyclictest	439376	-21	kworker/u16:2+flush-8:0	12:11:32	4
3979836	99	28	25,2	cyclictest	62346	-21	kworker/u16:0+flush-8:0	09:41:22	4
3979836	99	27	25,2	cyclictest	3960260	-21	kworker/u16:2+events_unbound	07:56:22	4
3979843	99	26	26,0	cyclictest	0	-21	swapper/7	09:42:08	7
3979843	99	26	25,0	cyclictest	0	-21	swapper/7	07:34:37	7
3979843	99	26	22,3	cyclictest	366202	-21	pool-gnome-soft	11:28:02	7
3979841	99	26	24,2	cyclictest	4120553	-21	kworker/u16:3+events_unbound	09:11:17	6
3979836	99	26	23,2	cyclictest	366335	-21	kworker/u16:4+events_unbound	11:36:19	4
3979841	99	25	23,2	cyclictest	135690	-21	kworker/u16:2+flush-8:0	10:01:17	6
3979837	99	25	23,2	cyclictest	331260	-21	kworker/u16:5+events_unbound	11:28:05	5
3979843	99	24	23,0	cyclictest	0	-21	swapper/7	08:47:26	7
3979843	99	24	23,0	cyclictest	0	-21	swapper/7	07:24:50	7
3979843	99	23	18,4	cyclictest	147878	-21	latency_hist	10:01:02	7
3979843	99	23	18,4	cyclictest	147878	-21	latency_hist	10:01:02	7
3979841	99	23	21,2	cyclictest	4186546	-21	kworker/u16:1+events_unbound	08:51:15	6
3979843	99	22	21,0	cyclictest	0	-21	swapper/7	07:58:49	7
3979843	99	22	21,0	cyclictest	0	-21	swapper/7	07:12:06	7
3979837	99	22	19,2	cyclictest	160536	-21	kworker/u16:1+flush-8:0	10:16:21	5
3979836	99	22	20,2	cyclictest	4011665	-21	kworker/u16:4+events_unbound	07:21:15	4
3979836	99	22	20,2	cyclictest	35267	-21	kworker/u16:5+events_unbound	09:21:21	4
3979836	99	22	20,2	cyclictest	304383	-21	kworker/u16:3+events_unbound	11:16:27	4
3979843	99	21	19,1	cyclictest	0	-21	swapper/7	11:46:21	7
3979841	99	21	19,2	cyclictest	62346	-21	kworker/u16:0+events_unbound	10:06:29	6
3979841	99	21	19,2	cyclictest	160536	-21	kworker/u16:1+events_unbound	11:16:25	6
3979836	99	21	19,2	cyclictest	4011665	-21	kworker/u16:4+events_unbound	08:11:31	4
3979836	99	21	19,2	cyclictest	366335	-21	kworker/u16:4+flush-8:0	11:56:26	4
3979836	99	21	18,2	cyclictest	62346	-21	kworker/u16:0+events_unbound	11:01:32	4
3979836	99	21	18,2	cyclictest	439376	-21	kworker/u16:2+events_unbound	12:16:17	4
3979843	99	20	19,0	cyclictest	0	-21	swapper/7	09:17:18	7
3979843	99	20	19,0	cyclictest	0	-21	swapper/7	09:17:18	7
3979843	99	20	19,0	cyclictest	0	-21	swapper/7	09:03:53	7
3979843	99	20	19,0	cyclictest	0	-21	swapper/7	08:35:33	7
3979837	99	20	18,2	cyclictest	366226	-21	kworker/u16:1+events_unbound	11:31:16	5
3979836	99	20	18,2	cyclictest	99384	-21	kworker/u16:3+events_unbound	09:46:16	4
3979836	99	20	18,2	cyclictest	62346	-21	kworker/u16:0+flush-8:0	10:06:29	4
3979836	99	20	18,2	cyclictest	439376	-21	kworker/u16:2+events_unbound	12:25:46	4
3979836	99	20	18,2	cyclictest	4120553	-21	kworker/u16:3+flush-8:0	08:25:57	4
3979836	99	20	18,2	cyclictest	4011665	-21	kworker/u16:4+events_unbound	07:41:23	4
3979836	99	20	18,2	cyclictest	160536	-21	kworker/u16:1+events_unbound	11:06:29	4
3979843	99	19	18,0	cyclictest	0	-21	swapper/7	08:59:33	7
3979843	99	19	18,0	cyclictest	0	-21	swapper/7	07:42:20	7
3979843	99	19	18,0	cyclictest	0	-21	swapper/7	07:30:01	7
3979843	99	19	14,4	cyclictest	490576	-21	latency_hist	12:21:02	7
3979843	99	19	14,4	cyclictest	429204	-21	latency_hist	11:56:01	7
3979841	99	19	17,2	cyclictest	366226	-21	kworker/u16:1+flush-8:0	11:33:59	6
3979841	99	19	16,2	cyclictest	4157729	-21	kworker/u16:0+flush-8:0	09:06:22	6
3979837	99	19	0,14	cyclictest	0	-21	swapper/5	10:42:35	5
3979836	99	19	17,2	cyclictest	392684	-21	kworker/u16:0+flush-8:0	12:01:26	4
3979843	99	18	17,0	cyclictest	0	-21	swapper/7	08:40:24	7
3979843	99	18	17,0	cyclictest	0	-21	swapper/7	08:40:24	7
3979843	99	18	17,0	cyclictest	0	-21	swapper/7	07:51:22	7
3979843	99	18	17,0	cyclictest	0	-21	swapper/7	07:51:22	7
3979843	99	18	16,1	cyclictest	182138	-21	ssh	10:11:40	7
3979843	99	18	16,1	cyclictest	0	-21	swapper/7	12:06:21	7
3979843	99	18	16,1	cyclictest	0	-21	swapper/7	11:06:25	7
3979841	99	18	15,2	cyclictest	2447562	-21	kworker/u16:1+flush-8:0	07:16:13	6
3979843	99	17	16,0	cyclictest	0	-21	swapper/7	11:36:27	7
3979843	99	17	16,0	cyclictest	0	-21	swapper/7	08:45:18	7
3979841	99	17	0,16	cyclictest	4054711	-21	cut	07:41:20	6
3979837	99	17	0,17	cyclictest	0	-21	swapper/5	11:18:22	5
3979836	99	17	15,2	cyclictest	3925671	-21	kworker/u16:0+events_unbound	07:36:16	4
3979836	99	17	15,2	cyclictest	331260	-21	kworker/u16:5+events_unbound	11:28:03	4
3979836	99	17	15,2	cyclictest	243423	-21	kworker/u16:3+events_unbound	10:51:30	4
3979836	99	17	15,2	cyclictest	160536	-21	kworker/u16:1+events_unbound	10:56:33	4
3979843	99	16	8,7	cyclictest	0	-21	swapper/7	10:46:20	7
3979843	99	16	8,7	cyclictest	0	-21	swapper/7	09:06:17	7
3979843	99	16	7,8	cyclictest	0	-21	swapper/7	09:36:22	7
3979843	99	16	15,1	cyclictest	13320	-21	diskmemload	11:56:27	7
3979843	99	16	15,0	cyclictest	0	-21	swapper/7	08:11:46	7
3979843	99	16	15,0	cyclictest	0	-21	swapper/7	07:20:04	7
3979843	99	16	14,1	cyclictest	404829	-21	sed	11:46:02	7
3979843	99	16	13,2	cyclictest	0	-21	swapper/7	10:56:02	7
3979837	99	16	14,2	cyclictest	99384	-21	kworker/u16:3+events_unbound	09:56:14	5
3979837	99	16	14,2	cyclictest	99384	-21	kworker/u16:3+events_unbound	09:56:14	5
3979837	99	16	12,1	cyclictest	0	-21	swapper/5	10:25:42	5
3979837	99	16	0,1	cyclictest	0	-21	swapper/5	08:41:24	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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