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 Tue Jul 14, 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
191774	2	99	2,95	sleep7	0	-21	swapper/7	19:09:51	7
191563	2	91	74,14	sleep5	0	-21	swapper/5	19:06:53	5
191698	2	83	79,3	sleep6	0	-21	swapper/6	19:08:46	6
709235	2	65	0,1	sleep7	709236	-21	grep	23:05:17	7
191600	2	37	17,8	sleep4	0	-21	swapper/4	19:07:24	4
199732	2	28	0,1	chrt	0	-21	swapper/5	19:10:21	5
192185	99	27	24,2	cyclictest	292572	-21	kworker/u16:0+events_unbound	20:14:59	4
192191	99	25	23,1	cyclictest	0	-21	swapper/7	22:44:59	7
192190	99	24	22,2	cyclictest	840838	-21	kworker/u16:4+flush-8:0	00:25:40	6
192189	99	24	22,2	cyclictest	205761	-21	kworker/u16:4+events_unbound	19:40:14	5
192191	99	23	2,14	cyclictest	0	-21	swapper/7	22:54:01	7
192191	99	22	20,1	cyclictest	0	-21	swapper/7	21:19:59	7
192191	99	22	18,2	cyclictest	720235	-21	iostat_ios	23:10:15	7
192191	99	22	17,4	cyclictest	397763	-21	cat	20:50:31	7
192191	99	21	18,2	cyclictest	928983	-21	grep	00:35:18	7
192191	99	21	18,2	cyclictest	788886	-21	smartctl	23:35:30	7
192191	99	21	1,13	cyclictest	839909	-21	ssh	23:59:09	7
192190	99	21	19,2	cyclictest	571731	-21	kworker/u16:3+flush-8:0	22:15:38	6
192189	99	21	19,2	cyclictest	755267	-21	kworker/u16:0+events_unbound	23:55:30	5
192189	99	21	19,2	cyclictest	571731	-21	kworker/u16:3+events_unbound	22:20:07	5
192191	99	20	17,2	cyclictest	266739	-21	grep	19:45:19	7
192191	99	20	0,18	cyclictest	648	-21	systemd-journal	19:54:54	7
192190	99	20	18,2	cyclictest	193143	-21	kworker/u16:3+events_unbound	19:35:29	6
192189	99	20	18,2	cyclictest	840838	-21	kworker/u16:4+events_unbound	00:25:14	5
192189	99	20	18,2	cyclictest	634033	-21	kworker/u16:1+flush-8:0	00:00:18	5
192191	99	19	18,0	cyclictest	0	-21	swapper/7	23:45:37	7
192190	99	19	17,2	cyclictest	427929	-21	kworker/u16:1+events_unbound	21:20:06	6
192189	99	19	17,2	cyclictest	755267	-21	kworker/u16:0+events_unbound	23:40:38	5
192189	99	19	17,2	cyclictest	634033	-21	kworker/u16:1+flush-8:0	23:10:32	5
192185	99	19	15,3	cyclictest	427371	-21	latency_hist	21:09:59	4
192185	99	19	0,14	cyclictest	0	-21	swapper/4	22:54:04	4
192191	99	18	17,0	cyclictest	0	-21	swapper/7	22:00:37	7
192191	99	18	17,0	cyclictest	0	-21	swapper/7	20:30:35	7
192191	99	18	17,0	cyclictest	0	-21	swapper/7	20:30:35	7
192190	99	18	16,2	cyclictest	399584	-21	kworker/u16:0+events_unbound	21:49:54	6
192190	99	18	16,1	cyclictest	0	-21	swapper/6	23:07:43	6
192189	99	18	5,5	cyclictest	0	-21	swapper/5	20:49:55	5
192189	99	18	16,2	cyclictest	634033	-21	kworker/u16:1+flush-8:0	23:21:05	5
192189	99	18	16,2	cyclictest	634033	-21	kworker/u16:1+events_unbound	00:05:04	5
192191	99	17	16,0	cyclictest	0	-21	swapper/7	20:55:28	7
192191	99	17	16,0	cyclictest	0	-21	swapper/7	20:40:31	7
192191	99	17	0,16	cyclictest	488194	-21	turbostat	21:34:58	7
192190	99	17	15,2	cyclictest	399584	-21	kworker/u16:0+events_unbound	20:57:06	6
192190	99	17	15,2	cyclictest	361176	-21	kworker/u16:0+flush-8:0	20:35:25	6
192189	99	17	15,2	cyclictest	427929	-21	kworker/u16:1+flush-8:0	22:00:04	5
192189	99	17	15,2	cyclictest	427929	-21	kworker/u16:1+flush-8:0	21:45:28	5
192189	99	17	15,2	cyclictest	300859	-21	kworker/u16:2+flush-8:0	21:40:27	5
192189	99	17	15,2	cyclictest	300859	-21	kworker/u16:2+events_unbound	22:31:49	5
192189	99	17	15,2	cyclictest	205761	-21	kworker/u16:4+events_unbound	19:20:28	5
512080	2	16	0,0	sleep7	512081	-21	sh	21:44:15	7
192191	99	16	3,5	cyclictest	0	-21	swapper/7	22:09:42	7
192191	99	16	13,2	cyclictest	800769	-21	ntpq	23:40:25	7
192191	99	16	13,2	cyclictest	499120	-21	ssh	21:37:47	7
192191	99	16	12,3	cyclictest	1302	-21	snmpd	00:19:12	7
192190	99	16	14,2	cyclictest	634033	-21	kworker/u16:1+flush-8:0	00:35:09	6
192190	99	16	14,2	cyclictest	634033	-21	kworker/u16:1+events_unbound	22:40:27	6
192190	99	16	14,2	cyclictest	399584	-21	kworker/u16:0+events_unbound	21:08:59	6
192190	99	16	14,2	cyclictest	300859	-21	kworker/u16:2+flush-8:0	22:10:49	6
192190	99	16	14,2	cyclictest	193143	-21	kworker/u16:3+flush-8:0	19:45:32	6
192190	99	16	14,2	cyclictest	193143	-21	kworker/u16:3+events_unbound	19:22:39	6
192190	99	16	14,2	cyclictest	163434	-21	kworker/u16:1+events_unbound	20:41:26	6
192190	99	16	10,6	cyclictest	6233	-21	gvfs-afc-volume	23:46:38	6
192189	99	16	14,2	cyclictest	634033	-21	kworker/u16:1+events_unbound	23:07:50	5
192185	99	16	12,3	cyclictest	634033	-21	kworker/u16:1+flush-8:0	23:09:59	4
192191	99	15	7,7	cyclictest	0	-21	swapper/7	19:19:46	7
192191	99	15	2,5	cyclictest	0	-21	swapper/7	22:12:06	7
192191	99	15	14,0	cyclictest	0	-21	swapper/7	20:03:43	7
192191	99	15	10,3	cyclictest	643788	-21	sh	22:35:50	7
192191	99	15	10,3	cyclictest	643788	-21	sh	22:35:50	7
192191	99	15	0,14	cyclictest	0	-21	swapper/7	20:29:21	7
192191	99	15	0,14	cyclictest	0	-21	swapper/7	20:29:21	7
192190	99	15	13,2	cyclictest	779668	-21	kworker/u16:2+flush-8:0	00:07:05	6
192190	99	15	13,2	cyclictest	755267	-21	kworker/u16:0+events_unbound	23:51:00	6
192190	99	15	13,2	cyclictest	718985	-21	kworker/u16:0+events_unbound	23:10:07	6
192190	99	15	13,2	cyclictest	703861	-21	kworker/u16:4+events_unbound	23:35:18	6
192190	99	15	13,2	cyclictest	571731	-21	kworker/u16:3+events_unbound	22:20:17	6
192190	99	15	13,2	cyclictest	339555	-21	kworker/u16:3+flush-8:0	20:45:33	6
192190	99	15	13,2	cyclictest	339555	-21	kworker/u16:3+events_unbound	20:54:39	6
192190	99	15	13,2	cyclictest	310500	-21	kworker/u16:5+flush-8:0	20:25:20	6
192190	99	15	13,2	cyclictest	310500	-21	kworker/u16:5+flush-8:0	20:25:20	6
192190	99	15	13,2	cyclictest	300859	-21	kworker/u16:2+events_unbound	22:35:06	6
192190	99	15	13,2	cyclictest	300859	-21	kworker/u16:2+events_unbound	22:35:06	6
192190	99	15	13,2	cyclictest	205761	-21	kworker/u16:4+events_unbound	19:32:27	6
192190	99	15	13,2	cyclictest	163434	-21	kworker/u16:1+events_unbound	20:23:23	6
192190	99	15	0,15	cyclictest	0	-21	swapper/6	22:32:00	6
192189	99	15	13,2	cyclictest	779668	-21	kworker/u16:2+events_unbound	00:10:19	5
192189	99	15	13,2	cyclictest	703861	-21	kworker/u16:4+events_unbound	23:39:44	5
192189	99	15	13,2	cyclictest	634033	-21	kworker/u16:1+events_unbound	00:30:52	5
192189	99	15	13,2	cyclictest	399584	-21	kworker/u16:0+events_unbound	21:34:59	5
192189	99	15	13,2	cyclictest	163434	-21	kworker/u16:1+events_unbound	20:17:26	5
192189	99	15	0,1	cyclictest	0	-21	swapper/5	00:35:21	5
192191	99	14	6,7	cyclictest	0	-21	swapper/7	20:09:57	7
192191	99	14	13,0	cyclictest	0	-21	swapper/7	20:48:55	7
192191	99	14	13,0	cyclictest	0	-21	swapper/7	00:34:19	7
192191	99	14	0,7	cyclictest	777314	-21	ssh	23:30:44	7
192191	99	14	0,6	cyclictest	0	-21	swapper/7	21:00:07	7
192191	99	14	0,6	cyclictest	0	-21	swapper/7	00:04:36	7
192190	99	14	13,1	cyclictest	0	-21	swapper/6	22:50:26	6
192190	99	14	12,2	cyclictest	840838	-21	kworker/u16:4+events_unbound	00:11:41	6
192190	99	14	12,2	cyclictest	427929	-21	kworker/u16:1+events_unbound	21:34:35	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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