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 Aug 06, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
434903	2	148	0,1	sleep4	0	-21	swapper/4	09:49:44	4
89389	2	58	24,29	sleep7	0	-21	swapper/7	07:08:10	7
89204	2	50	40,7	sleep4	0	-21	swapper/4	07:05:34	4
89293	2	43	32,8	sleep5	0	-21	swapper/5	07:06:48	5
89703	99	38	35,2	cyclictest	706105	-21	kworker/u16:2+flush-8:0	12:23:28	4
89332	2	36	26,7	sleep6	0	-21	swapper/6	07:07:21	6
89703	99	35	32,2	cyclictest	376084	-21	kworker/u16:2+flush-8:0	09:43:28	4
89708	99	33	31,2	cyclictest	534829	-21	kworker/u16:4+events_unbound	10:53:52	5
89711	99	30	25,4	cyclictest	249053	-21	latency_hist	08:28:29	7
89711	99	30	24,5	cyclictest	559221	-21	latency_hist	10:43:28	7
89709	99	29	26,3	cyclictest	751920	-21	kworker/u16:5+flush-8:0	11:59:30	6
89708	99	29	27,2	cyclictest	436978	-21	kworker/u16:2+flush-8:0	09:58:44	5
89711	99	28	27,0	cyclictest	0	-21	swapper/7	07:11:15	7
89703	99	28	26,2	cyclictest	593384	-21	kworker/u16:2+events_unbound	11:13:23	4
89703	99	28	26,2	cyclictest	473688	-21	kworker/u16:0+events_unbound	10:28:42	4
89703	99	28	26,2	cyclictest	249436	-21	kworker/u16:2+events_unbound	08:43:43	4
766981	2	28	0,1	chrt	766982	-21	sh	12:08:03	7
89711	99	27	25,1	cyclictest	362692	-21	ssh	09:21:51	7
89703	99	27	25,2	cyclictest	571438	-21	kworker/u16:0+events_unbound	10:48:42	4
89703	99	27	25,2	cyclictest	473688	-21	kworker/u16:0+events_unbound	10:18:51	4
89703	99	27	25,2	cyclictest	311529	-21	kworker/u16:2+events_unbound	09:03:43	4
89711	99	26	25,0	cyclictest	0	-21	swapper/7	12:36:58	7
89711	99	26	0,1	cyclictest	0	-21	swapper/7	11:43:50	7
89708	99	25	22,2	cyclictest	571438	-21	kworker/u16:0+flush-8:0	10:58:33	5
89703	99	25	23,2	cyclictest	571438	-21	kworker/u16:0+events_unbound	11:13:44	4
89703	99	25	23,2	cyclictest	473688	-21	kworker/u16:0+events_unbound	10:08:57	4
89711	99	24	23,0	cyclictest	0	-21	swapper/7	11:37:15	7
89711	99	24	19,4	cyclictest	644095	-21	pool-/usr/libex	11:17:20	7
89711	99	24	19,4	cyclictest	200467	-21	latency_hist	08:03:28	7
89708	99	24	21,3	cyclictest	495658	-21	kworker/u16:2+flush-8:0	10:38:29	5
89708	99	24	21,2	cyclictest	200662	-21	kworker/u16:1+events_unbound	08:13:43	5
89703	99	24	22,2	cyclictest	825873	-21	kworker/u16:0+events_unbound	12:33:56	4
89703	99	24	22,2	cyclictest	643539	-21	kworker/u16:1+events_unbound	11:18:43	4
89703	99	24	22,2	cyclictest	571438	-21	kworker/u16:0+flush-8:0	11:00:43	4
89703	99	24	22,2	cyclictest	142265	-21	kworker/u16:3+events_unbound	07:54:26	4
89711	99	23	22,0	cyclictest	0	-21	swapper/7	08:36:55	7
89711	99	23	21,1	cyclictest	521803	-21	ssh	10:27:06	7
89711	99	23	17,5	cyclictest	412541	-21	ls	09:43:28	7
89708	99	23	20,2	cyclictest	643539	-21	kworker/u16:1+flush-8:0	11:17:26	5
89708	99	23	19,4	cyclictest	249436	-21	kworker/u16:2+flush-8:0	08:43:28	5
89703	99	23	21,2	cyclictest	388437	-21	kworker/u16:3+events_unbound	10:13:41	4
89703	99	23	20,2	cyclictest	422397	-21	kworker/u16:1+events_unbound	10:33:39	4
495993	2	23	0,1	chrt	495991	-21	ssh	10:14:39	7
89711	99	22	21,0	cyclictest	0	-21	swapper/7	09:13:08	7
89711	99	22	21,0	cyclictest	0	-21	swapper/7	07:49:55	7
89711	99	22	21,0	cyclictest	0	-21	swapper/7	07:47:36	7
89711	99	22	18,3	cyclictest	351387	-21	date	09:18:28	7
89703	99	22	20,2	cyclictest	706105	-21	kworker/u16:2+flush-8:0	12:28:59	4
89703	99	22	20,2	cyclictest	288009	-21	kworker/u16:1+events_unbound	09:18:56	4
89711	99	21	20,0	cyclictest	0	-21	swapper/7	10:06:54	7
89711	99	21	20,0	cyclictest	0	-21	swapper/7	10:06:54	7
89711	99	21	0,19	cyclictest	648	-21	systemd-journal	11:27:23	7
89708	99	21	19,2	cyclictest	534829	-21	kworker/u16:4+flush-8:0	10:38:54	5
89703	99	21	19,2	cyclictest	730486	-21	kworker/u16:3+flush-8:0	12:13:48	4
89703	99	21	19,2	cyclictest	436978	-21	kworker/u16:2+flush-8:0	09:53:59	4
89703	99	21	19,2	cyclictest	422397	-21	kworker/u16:1+flush-8:0	10:05:35	4
89703	99	21	19,2	cyclictest	422397	-21	kworker/u16:1+flush-8:0	10:05:35	4
89703	99	21	19,2	cyclictest	142265	-21	kworker/u16:3+flush-8:0	07:38:56	4
89703	99	21	19,2	cyclictest	13580	-21	kworker/u16:0+events_unbound	07:33:49	4
89711	99	20	19,0	cyclictest	0	-21	swapper/7	08:29:47	7
89711	99	20	19,0	cyclictest	0	-21	swapper/7	07:54:48	7
89711	99	20	19,0	cyclictest	0	-21	swapper/7	07:37:27	7
89711	99	20	18,1	cyclictest	0	-21	swapper/7	10:58:51	7
89708	99	20	15,5	cyclictest	288009	-21	kworker/u16:1+events_unbound	09:18:52	5
89703	99	20	18,2	cyclictest	692417	-21	kworker/u16:0+events_unbound	11:36:56	4
89703	99	20	18,2	cyclictest	534829	-21	kworker/u16:4+events_unbound	10:43:52	4
89703	99	20	18,2	cyclictest	534829	-21	kworker/u16:4+events_unbound	10:43:52	4
89703	99	20	18,2	cyclictest	376084	-21	kworker/u16:2+events_unbound	09:36:27	4
89711	99	19	18,0	cyclictest	0	-21	swapper/7	12:13:40	7
89711	99	19	18,0	cyclictest	0	-21	swapper/7	10:32:24	7
89711	99	19	0,18	cyclictest	0	-21	swapper/7	07:38:51	7
89711	99	19	0,17	cyclictest	1302	-21	snmpd	10:22:44	7
89703	99	19	17,2	cyclictest	706105	-21	kworker/u16:2+events_unbound	11:46:23	4
89703	99	19	17,2	cyclictest	422397	-21	kworker/u16:1+flush-8:0	09:58:56	4
89703	99	19	17,2	cyclictest	288010	-21	kworker/u16:3+flush-8:0	09:10:59	4
89703	99	19	17,2	cyclictest	200662	-21	kworker/u16:1+events_unbound	08:08:40	4
89703	99	19	16,2	cyclictest	180704	-21	kworker/u16:0+events_unbound	08:58:42	4
89703	99	19	14,2	cyclictest	288010	-21	kworker/u16:3+events_unbound	08:53:53	4
89711	99	18	17,0	cyclictest	0	-21	swapper/7	11:38:37	7
89711	99	18	17,0	cyclictest	0	-21	swapper/7	11:30:25	7
89711	99	18	17,0	cyclictest	0	-21	swapper/7	11:30:25	7
89711	99	18	17,0	cyclictest	0	-21	swapper/7	11:08:51	7
89708	99	18	16,2	cyclictest	288010	-21	kworker/u16:3+flush-8:0	08:58:44	5
89708	99	18	16,2	cyclictest	200662	-21	kworker/u16:1+flush-8:0	08:23:42	5
89703	99	18	16,2	cyclictest	644178	-21	kworker/u16:5+events_unbound	11:28:55	4
89703	99	18	16,2	cyclictest	644178	-21	kworker/u16:5+events_unbound	11:28:55	4
89703	99	18	16,2	cyclictest	643539	-21	kworker/u16:1+flush-8:0	11:24:04	4
89703	99	18	16,2	cyclictest	643539	-21	kworker/u16:1+events_unbound	12:00:03	4
89703	99	18	16,2	cyclictest	376084	-21	kworker/u16:2+events_unbound	09:43:41	4
89703	99	18	16,2	cyclictest	151902	-21	kworker/u16:4+flush-8:0	08:33:57	4
89703	99	18	15,2	cyclictest	473688	-21	kworker/u16:0+flush-8:0	10:23:31	4
89703	99	18	15,2	cyclictest	180704	-21	kworker/u16:0+events_unbound	08:23:35	4
89711	99	17	16,0	cyclictest	0	-21	swapper/7	09:47:45	7
89711	99	17	16,0	cyclictest	0	-21	swapper/7	08:07:22	7
89711	99	17	15,1	cyclictest	569621	-21	ssh	10:45:12	7
89711	99	17	15,1	cyclictest	569621	-21	ssh	10:45:12	7
89711	99	17	15,1	cyclictest	0	-21	swapper/7	10:53:48	7
89703	99	17	15,2	cyclictest	571438	-21	kworker/u16:0+flush-8:0	11:06:10	4
89703	99	17	15,2	cyclictest	422397	-21	kworker/u16:1+events_unbound	10:38:51	4
89703	99	17	15,2	cyclictest	249436	-21	kworker/u16:2+events_unbound	08:28:52	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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