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 Sat Jun 06, 2026 00:43:36)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2450792	99	57	54,2	cyclictest	2628364	-21	kworker/u16:2+events_unbound	21:22:04	5
2450417	2	57	47,7	sleep4	0	-21	swapper/4	19:05:15	4
2450792	99	55	53,2	cyclictest	2412658	-21	kworker/u16:4+flush-8:0	20:02:00	5
2450303	2	55	45,7	sleep5	0	-21	swapper/5	19:03:40	5
2450792	99	54	52,2	cyclictest	2635834	-21	kworker/u16:4+events_unbound	20:52:01	5
2450802	99	53	49,3	cyclictest	124	-21	kswapd0	23:26:46	7
2450792	99	53	51,2	cyclictest	2827008	-21	kworker/u16:2+events_unbound	22:02:04	5
2450792	99	50	48,2	cyclictest	2635834	-21	kworker/u16:4+flush-8:0	20:47:02	5
2450792	99	50	47,2	cyclictest	3072821	-21	kworker/u16:0+events_unbound	00:06:45	5
2450792	99	49	47,2	cyclictest	3012163	-21	kworker/u16:4+flush-8:0	23:41:47	5
2450792	99	49	47,2	cyclictest	2827008	-21	kworker/u16:2+events_unbound	22:27:05	5
2450792	99	47	45,2	cyclictest	2936150	-21	kworker/u16:3+events_unbound	23:11:54	5
2450792	99	47	45,2	cyclictest	2879105	-21	kworker/u16:0+events_unbound	22:47:03	5
2450792	99	47	45,2	cyclictest	2532478	-21	kworker/u16:0+flush-8:0	20:12:01	5
2450792	99	46	44,2	cyclictest	3155660	-21	kworker/u16:4+flush-8:0	00:22:04	5
2450792	99	46	44,2	cyclictest	2532478	-21	kworker/u16:0+events_unbound	20:22:01	5
2450789	99	46	43,2	cyclictest	2839976	-21	kworker/u16:1+flush-8:0	22:21:57	4
2450792	99	45	43,2	cyclictest	2412658	-21	kworker/u16:4+flush-8:0	19:11:48	5
2450789	99	45	43,2	cyclictest	2532478	-21	kworker/u16:0+events_unbound	20:11:59	4
2449615	2	44	3,35	sleep7	0	-21	swapper/7	19:02:05	7
2450792	99	43	41,2	cyclictest	3146226	-21	kworker/u16:0+flush-8:0	00:26:47	5
2450792	99	43	41,2	cyclictest	3146226	-21	kworker/u16:0+flush-8:0	00:26:47	5
2450792	99	43	41,2	cyclictest	2936150	-21	kworker/u16:3+flush-8:0	23:01:46	5
2450789	99	43	41,2	cyclictest	2635834	-21	kworker/u16:4+flush-8:0	21:01:59	4
2450789	99	43	41,2	cyclictest	2635834	-21	kworker/u16:4+flush-8:0	21:01:59	4
2450792	99	42	41,1	cyclictest	2915428	-21	kworker/u16:1+events_unbound	23:36:47	5
2450792	99	42	40,2	cyclictest	2915428	-21	kworker/u16:1+flush-8:0	22:42:04	5
2450792	99	42	40,2	cyclictest	2635834	-21	kworker/u16:4+events_unbound	21:46:59	5
2450792	99	42	40,2	cyclictest	2460278	-21	kworker/u16:2+events_unbound	19:57:00	5
2450792	99	41	39,2	cyclictest	3072821	-21	kworker/u16:0+events_unbound	23:46:59	5
2450792	99	41	39,2	cyclictest	2827008	-21	kworker/u16:2+events_unbound	22:32:06	5
2450792	99	41	39,2	cyclictest	2460278	-21	kworker/u16:2+flush-8:0	20:07:00	5
2450802	99	40	34,5	cyclictest	635	-21	systemd-journal	19:21:32	7
2450792	99	39	37,2	cyclictest	3119955	-21	kworker/u16:1+events_unbound	00:21:17	5
2450792	99	39	37,2	cyclictest	2948857	-21	kworker/u16:2+events_unbound	23:21:54	5
2450792	99	39	37,2	cyclictest	2936150	-21	kworker/u16:3+flush-8:0	22:58:06	5
2450792	99	39	37,2	cyclictest	2628364	-21	kworker/u16:2+flush-8:0	21:37:00	5
2450792	99	39	36,2	cyclictest	2559827	-21	kworker/u16:1+flush-8:0	20:26:47	5
2450792	99	39	35,2	cyclictest	3119955	-21	kworker/u16:1+events_unbound	00:31:50	5
2450792	99	39	35,2	cyclictest	3119955	-21	kworker/u16:1+events_unbound	00:31:50	5
2450802	99	38	32,5	cyclictest	2854476	-21	latency_hist	22:16:32	7
2450792	99	38	36,2	cyclictest	3012163	-21	kworker/u16:4+flush-8:0	23:34:17	5
2450792	99	38	36,2	cyclictest	2948857	-21	kworker/u16:2+events_unbound	23:56:45	5
2450792	99	38	36,2	cyclictest	2635834	-21	kworker/u16:4+flush-8:0	21:51:59	5
2450792	99	38	36,2	cyclictest	2635834	-21	kworker/u16:4+events_unbound	21:28:14	5
2450792	99	38	36,2	cyclictest	2635834	-21	kworker/u16:4+events_unbound	21:20:03	5
2450792	99	38	35,2	cyclictest	2628364	-21	kworker/u16:2+flush-8:0	21:31:45	5
2450792	99	37	35,2	cyclictest	3119955	-21	kworker/u16:1+events_unbound	00:13:14	5
2450792	99	37	35,2	cyclictest	2948857	-21	kworker/u16:2+events_unbound	23:29:53	5
2450792	99	37	35,2	cyclictest	2839976	-21	kworker/u16:1+flush-8:0	22:21:14	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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