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 50 highest latencies:

System rack0slot2.osadl.org (updated Wed Dec 24, 2025 00:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4041209	2	71	0,1	sleep7	4041210	-21	sh	19:24:14	7
4008181	2	58	47,8	sleep5	0	-21	swapper/5	19:08:58	5
340022	2	55	0,0	sleep7	340023	-21	tr	23:34:37	7
4007964	2	53	19,30	sleep7	0	-21	swapper/7	19:05:56	7
4008122	2	46	16,8	sleep4	0	-21	swapper/4	19:08:09	4
4008500	99	44	38,5	cyclictest	4167051	-21	latency_hist	20:29:13	7
4008115	2	42	18,7	sleep6	0	-21	swapper/6	19:08:03	6
4008490	99	37	35,2	cyclictest	4138056	-21	kworker/u16:0+flush-8:0	20:19:32	5
4141827	2	36	0,1	sleep5	0	-21	swapper/5	20:14:36	5
4008500	99	35	0,34	cyclictest	4019508	-21	grep	19:14:17	7
4008490	99	35	33,2	cyclictest	3741449	-21	kworker/u16:0+flush-8:0	19:24:43	5
4008490	99	35	33,2	cyclictest	254893	-21	kworker/u16:2+events_unbound	23:44:07	5
4008490	99	35	33,2	cyclictest	177158	-21	kworker/u16:3+events_unbound	22:39:27	5
4008490	99	35	33,2	cyclictest	156618	-21	kworker/u16:5+events_unbound	22:54:28	5
4008490	99	34	32,2	cyclictest	371008	-21	kworker/u16:3+events_unbound	23:54:30	5
4008490	99	33	31,2	cyclictest	177158	-21	kworker/u16:3+flush-8:0	22:29:13	5
4008490	99	33	31,2	cyclictest	156618	-21	kworker/u16:5+events_unbound	23:04:28	5
4008490	99	33	31,2	cyclictest	156618	-21	kworker/u16:5+events_unbound	23:04:28	5
4008490	99	32	30,2	cyclictest	41666	-21	kworker/u16:0+flush-8:0	21:04:43	5
4008490	99	32	29,2	cyclictest	4176905	-21	kworker/u16:2+events_unbound	20:34:15	5
4008490	99	31	28,2	cyclictest	390298	-21	kworker/u16:1+flush-8:0	00:19:30	5
4008500	99	30	24,5	cyclictest	79970	-21	latency_hist	21:24:13	7
4008490	99	30	28,2	cyclictest	41666	-21	kworker/u16:0+events_unbound	21:34:13	5
4008490	99	30	28,2	cyclictest	41666	-21	kworker/u16:0+events_unbound	21:34:13	5
4008490	99	30	28,2	cyclictest	371008	-21	kworker/u16:3+events_unbound	00:34:30	5
4008490	99	30	27,2	cyclictest	41666	-21	kworker/u16:0+flush-8:0	21:19:14	5
4008490	99	29	27,2	cyclictest	80003	-21	kworker/u16:1+events_unbound	22:04:32	5
4008490	99	29	26,2	cyclictest	69953	-21	kworker/u16:2+events_unbound	21:24:27	5
4008490	99	28	26,2	cyclictest	3979249	-21	kworker/u16:3+events_unbound	19:29:28	5
194455	2	28	0,1	sleep5	0	-21	swapper/5	22:19:35	5
4008490	99	27	25,2	cyclictest	245020	-21	kworker/u16:0+events_unbound	22:49:29	5
4008500	99	26	24,1	cyclictest	0	-21	swapper/7	19:09:36	7
4008500	99	26	24,1	cyclictest	0	-21	swapper/7	19:09:36	7
4008500	99	26	23,2	cyclictest	1267	-21	snmpd	20:33:50	7
4008500	99	26	21,4	cyclictest	4108938	-21	latency_hist	19:59:14	7
4008500	99	26	21,4	cyclictest	4108938	-21	latency_hist	19:59:14	7
4008495	99	26	22,3	cyclictest	254893	-21	kworker/u16:2+flush-8:0	23:24:39	6
4008490	99	26	24,2	cyclictest	390298	-21	kworker/u16:1+events_unbound	00:14:26	5
4008490	99	26	24,2	cyclictest	254893	-21	kworker/u16:2+flush-8:0	22:59:46	5
4008490	99	26	24,2	cyclictest	20958	-21	kworker/u16:3+events_unbound	21:14:27	5
434677	2	25	0,1	chrt	74	1	rcuc/5	00:24:35	5
41274	2	25	0,1	chrt	41271	-21	crond	21:04:13	7
4008500	99	25	24,0	cyclictest	0	-21	swapper/7	00:22:23	7
4008500	99	25	19,5	cyclictest	273916	-21	latency_hist	23:04:13	7
4008490	99	25	23,2	cyclictest	4161742	-21	kworker/u16:1+events_unbound	20:49:39	5
4008490	99	25	23,2	cyclictest	379341	-21	kworker/u16:4+events_unbound	00:04:28	5
4008490	99	24	22,2	cyclictest	4161742	-21	kworker/u16:1+events_unbound	21:12:31	5
4008490	99	24	21,2	cyclictest	4041396	-21	kworker/u16:4+events_unbound	20:54:23	5
385743	2	24	0,1	chrt	0	-21	swapper/5	23:59:35	5
4008500	99	23	20,2	cyclictest	236267	-21	fw_packets	22:44:28	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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