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 Thu Dec 18, 2025 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3902974	2	52	41,8	sleep4	0	-21	swapper/4	07:06:12	4
3902926	2	48	37,8	sleep5	0	-21	swapper/5	07:05:33	5
3903033	2	46	13,29	sleep7	0	-21	swapper/7	07:07:03	7
3903504	99	41	35,5	cyclictest	4004548	-21	latency_hist	07:59:36	7
3903218	2	35	25,7	sleep6	0	-21	swapper/6	07:09:35	6
3903504	99	34	28,5	cyclictest	152018	-21	latency_hist	10:54:35	7
3903504	99	34	28,5	cyclictest	152018	-21	latency_hist	10:54:35	7
3903504	99	33	25,7	cyclictest	220175	-21	latency_hist	11:29:35	7
3903499	99	30	28,2	cyclictest	4180204	-21	kworker/u16:4+events_unbound	10:42:45	5
3903499	99	29	27,2	cyclictest	3985147	-21	kworker/u16:1+events_unbound	08:10:05	5
3903494	99	29	27,2	cyclictest	2429023	-21	kworker/u16:3+flush-8:0	08:19:35	4
3903499	99	28	26,2	cyclictest	4072728	-21	kworker/u16:1+events_unbound	09:48:11	5
3903499	99	28	26,2	cyclictest	4062612	-21	kworker/u16:0+events_unbound	08:26:55	5
3903499	99	28	26,2	cyclictest	4062612	-21	kworker/u16:0+events_unbound	08:26:55	5
3903499	99	28	26,2	cyclictest	2429023	-21	kworker/u16:3+events_unbound	07:19:36	5
3903494	99	28	26,2	cyclictest	4014480	-21	kworker/u16:4+flush-8:0	08:49:36	4
3903494	99	28	26,2	cyclictest	3946485	-21	kworker/u16:2+events_unbound	07:39:59	4
3903499	99	27	25,2	cyclictest	4179857	-21	kworker/u16:2+events_unbound	10:00:05	5
3903499	99	27	25,2	cyclictest	4179857	-21	kworker/u16:2+events_unbound	10:00:05	5
3903499	99	27	25,2	cyclictest	4072728	-21	kworker/u16:1+events_unbound	08:48:45	5
3903499	99	27	25,2	cyclictest	3946485	-21	kworker/u16:2+events_unbound	08:00:54	5
3903499	99	27	24,2	cyclictest	4122717	-21	kworker/u16:0+flush-8:0	09:19:36	5
3903499	99	27	24,2	cyclictest	160592	-21	kworker/u16:3+events_unbound	10:59:45	5
3903494	99	27	24,2	cyclictest	152399	-21	kworker/u16:0+events_unbound	11:04:58	4
3903504	99	26	20,5	cyclictest	3985114	-21	latency_hist	07:49:36	7
3903499	99	26	24,2	cyclictest	4180204	-21	kworker/u16:4+events_unbound	10:36:47	5
3903499	99	26	24,2	cyclictest	225494	-21	kworker/u16:3+events_unbound	12:18:21	5
3903499	99	26	24,2	cyclictest	103543	-21	kworker/u16:3+events_unbound	10:30:03	5
3903499	99	26	23,2	cyclictest	4180204	-21	kworker/u16:4+flush-8:0	10:24:46	5
3903499	99	26	23,2	cyclictest	249385	-21	kworker/u16:4+events_unbound	12:34:36	5
3903494	99	26	24,2	cyclictest	4180204	-21	kworker/u16:4+flush-8:0	11:04:35	4
3903494	99	25	23,2	cyclictest	84144	-21	kworker/u16:1+events_unbound	10:19:57	4
3903494	99	25	23,2	cyclictest	180243	-21	kworker/u16:1+events_unbound	11:34:54	4
3903499	99	24	22,2	cyclictest	3946485	-21	kworker/u16:2+events_unbound	07:56:54	5
3903499	99	24	22,2	cyclictest	3927997	-21	kworker/u16:0+events_unbound	07:25:10	5
3903499	99	24	22,2	cyclictest	34294	-21	kworker/u16:5+events_unbound	09:54:38	5
3903499	99	24	22,2	cyclictest	307314	-21	kworker/u16:2+events_unbound	12:28:05	5
3903499	99	24	22,2	cyclictest	307314	-21	kworker/u16:2+events_unbound	12:28:05	5
3903494	99	24	22,2	cyclictest	3884940	-21	kworker/u16:5+events_unbound	07:14:49	4
3903504	99	23	18,4	cyclictest	650	-21	systemd-journal	09:19:30	7
3903504	99	23	18,4	cyclictest	3994842	-21	latency_hist	07:54:36	7
3903504	99	23	0,21	cyclictest	200698	-21	latency_hist	11:19:35	7
3903499	99	23	21,2	cyclictest	4111776	-21	kworker/u16:5+events_unbound	09:01:50	5
3903499	99	23	21,2	cyclictest	249385	-21	kworker/u16:4+flush-8:0	11:53:01	5
3903494	99	23	21,2	cyclictest	4014480	-21	kworker/u16:4+flush-8:0	08:20:03	4
3903494	99	23	21,2	cyclictest	15855	-21	kworker/u16:0+events_unbound	09:45:06	4
3903499	99	22	20,2	cyclictest	54664	-21	kworker/u16:0+events_unbound	10:07:58	5
3903499	99	22	20,2	cyclictest	4179857	-21	kworker/u16:2+events_unbound	10:57:46	5
3903499	99	22	20,2	cyclictest	4072728	-21	kworker/u16:1+events_unbound	09:12:02	5
3903499	99	22	20,2	cyclictest	225494	-21	kworker/u16:3+flush-8:0	11:55:04	5
3903499	99	22	20,2	cyclictest	152399	-21	kworker/u16:0+flush-8:0	12:04:17	5
3903494	99	22	20,2	cyclictest	3927997	-21	kworker/u16:0+events_unbound	07:19:59	4
3903494	99	22	20,2	cyclictest	2429023	-21	kworker/u16:3+flush-8:0	08:04:31	4
3903504	99	21	16,4	cyclictest	650	-21	systemd-journal	08:54:36	7
3903499	99	21	19,2	cyclictest	84144	-21	kworker/u16:1+events_unbound	10:53:10	5
3903499	99	21	19,2	cyclictest	84144	-21	kworker/u16:1+events_unbound	10:53:10	5
3903499	99	21	19,2	cyclictest	3946485	-21	kworker/u16:2+flush-8:0	07:48:59	5
3903494	99	21	18,2	cyclictest	2429023	-21	kworker/u16:3+flush-8:0	09:29:35	4
3903494	99	21	17,3	cyclictest	180243	-21	kworker/u16:1+flush-8:0	11:29:48	4
3903504	99	20	14,5	cyclictest	3913134	-21	latency_hist	07:14:36	7
3903499	99	20	18,2	cyclictest	317429	-21	kworker/u16:0+events_unbound	12:22:58	5
3903499	99	20	18,2	cyclictest	180243	-21	kworker/u16:1+events_unbound	11:37:38	5
3903499	99	20	18,2	cyclictest	180243	-21	kworker/u16:1+events_unbound	11:20:51	5
3903499	99	20	17,2	cyclictest	152399	-21	kworker/u16:0+flush-8:0	12:04:45	5
3903494	99	20	18,2	cyclictest	84144	-21	kworker/u16:1+events_unbound	10:54:54	4
3903494	99	20	18,2	cyclictest	4072728	-21	kworker/u16:1+flush-8:0	09:39:50	4
3903504	99	19	15,3	cyclictest	1267	-21	snmpd	07:15:40	7
3903499	99	19	17,2	cyclictest	4180204	-21	kworker/u16:4+flush-8:0	09:29:51	5
3903499	99	19	17,2	cyclictest	4180204	-21	kworker/u16:4+events_unbound	09:43:01	5
3903499	99	19	17,2	cyclictest	3985147	-21	kworker/u16:1+events_unbound	07:54:11	5
3903499	99	19	17,2	cyclictest	3964702	-21	kworker/u16:0+events_unbound	07:41:06	5
3903499	99	19	17,2	cyclictest	3946485	-21	kworker/u16:2+events_unbound	08:05:00	5
3903499	99	19	17,2	cyclictest	3838908	-21	kworker/u16:1+events_unbound	07:10:03	5
3903499	99	19	17,2	cyclictest	2429023	-21	kworker/u16:3+events_unbound	08:50:58	5
3903499	99	19	16,2	cyclictest	84144	-21	kworker/u16:1+events_unbound	10:44:38	5
3903494	99	19	17,2	cyclictest	4111776	-21	kworker/u16:5+events_unbound	08:54:58	4
3903494	99	19	16,3	cyclictest	152399	-21	kworker/u16:0+flush-8:0	11:10:01	4
3903504	99	18	14,3	cyclictest	1267	-21	snmpd	09:33:37	7
3903499	99	18	16,2	cyclictest	180243	-21	kworker/u16:1+events_unbound	11:11:38	5
3903499	99	18	16,2	cyclictest	152399	-21	kworker/u16:0+events_unbound	11:49:10	5
3903499	99	18	15,2	cyclictest	2429023	-21	kworker/u16:3+events_unbound	07:29:38	5
3903504	99	17	13,3	cyclictest	1267	-21	snmpd	12:35:29	7
3903504	99	17	11,5	cyclictest	4140955	-21	latency_hist	09:09:35	7
3903504	99	17	0,16	cyclictest	0	-21	swapper/7	07:30:00	7
3903499	99	17	15,2	cyclictest	54664	-21	kworker/u16:0+events_unbound	10:14:42	5
3903499	99	17	15,2	cyclictest	4180204	-21	kworker/u16:4+events_unbound	10:11:42	5
3903499	99	17	15,2	cyclictest	4179857	-21	kworker/u16:2+flush-8:0	10:20:05	5
3903499	99	17	15,2	cyclictest	4014480	-21	kworker/u16:4+flush-8:0	08:24:06	5
3903499	99	17	15,2	cyclictest	307314	-21	kworker/u16:2+events_unbound	12:33:10	5
3903499	99	17	15,2	cyclictest	152399	-21	kworker/u16:0+flush-8:0	11:40:13	5
3903499	99	17	14,2	cyclictest	2429023	-21	kworker/u16:3+flush-8:0	07:34:51	5
3903499	99	17	14,2	cyclictest	2429023	-21	kworker/u16:3+flush-8:0	07:34:51	5
3903494	99	17	15,2	cyclictest	54664	-21	kworker/u16:0+flush-8:0	10:14:53	4
3903494	99	17	15,2	cyclictest	4179857	-21	kworker/u16:2+events_unbound	09:59:57	4
3903494	99	17	15,2	cyclictest	4179857	-21	kworker/u16:2+events_unbound	09:59:57	4
3903494	99	17	15,2	cyclictest	225494	-21	kworker/u16:3+flush-8:0	12:24:58	4
3903494	99	17	15,2	cyclictest	225494	-21	kworker/u16:3+flush-8:0	12:24:58	4
3903494	99	17	14,2	cyclictest	249385	-21	kworker/u16:4+flush-8:0	11:49:57	4
3903504	99	16	12,3	cyclictest	1267	-21	snmpd	09:02:13	7
3903504	99	16	0,1	cyclictest	0	-21	swapper/7	08:35:01	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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