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 Thu Apr 09, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2901660	2	107	0,1	sleep5	0	-21	swapper/5	22:20:55	5
2659761	2	97	0,1	sleep7	2659763	-21	cut	20:32:30	7
2806300	2	93	0,0	sleep6	0	-21	swapper/6	21:42:09	6
2476184	2	62	51,8	sleep4	0	-21	swapper/4	18:59:09	4
2476691	99	59	56,2	cyclictest	2815759	-21	kworker/u16:0+flush-8:0	22:02:24	4
2476700	99	56	54,2	cyclictest	2528120	-21	kworker/u16:1+flush-8:0	19:37:35	6
2476691	99	53	51,2	cyclictest	2815759	-21	kworker/u16:0+events_unbound	22:17:42	4
2476691	99	52	50,2	cyclictest	2643051	-21	kworker/u16:4+events_unbound	20:32:35	4
2476691	99	51	49,2	cyclictest	3072353	-21	kworker/u16:2+flush-8:0	23:47:34	4
2476691	99	51	49,2	cyclictest	3033372	-21	kworker/u16:1+events_unbound	00:02:34	4
2476691	99	51	49,2	cyclictest	2466919	-21	kworker/u16:1+flush-8:0	19:07:35	4
2476702	99	49	44,4	cyclictest	3203364	-21	latency_hist	00:27:09	7
2476694	99	49	46,2	cyclictest	2576149	-21	kworker/u16:0+flush-8:0	21:27:23	5
2476691	99	49	46,2	cyclictest	3040342	-21	kworker/u16:5+events_unbound	23:27:24	4
2476691	99	49	46,2	cyclictest	2914415	-21	kworker/u16:3+flush-8:0	22:57:24	4
2476691	99	48	46,2	cyclictest	3033372	-21	kworker/u16:1+events_unbound	00:12:40	4
2476691	99	48	46,2	cyclictest	3033372	-21	kworker/u16:1+events_unbound	00:12:40	4
2476691	99	48	45,2	cyclictest	2960398	-21	kworker/u16:1+events_unbound	22:47:43	4
2476694	99	47	45,2	cyclictest	2914415	-21	kworker/u16:3+events_unbound	00:07:39	5
2476691	99	47	45,2	cyclictest	2839745	-21	kworker/u16:2+events_unbound	22:07:24	4
2476691	99	47	44,2	cyclictest	2643051	-21	kworker/u16:4+events_unbound	20:27:24	4
2476694	99	46	44,2	cyclictest	2815759	-21	kworker/u16:0+flush-8:0	22:22:26	5
2476691	99	46	44,2	cyclictest	2962684	-21	kworker/u16:0+flush-8:0	22:53:26	4
2476691	99	46	44,2	cyclictest	2888775	-21	kworker/u16:2+events_unbound	22:42:37	4
2475802	2	46	10,31	sleep7	0	-21	swapper/7	18:57:44	7
2918933	2	45	0,0	sleep6	0	-21	swapper/6	22:27:29	6
2476691	99	45	43,2	cyclictest	3124884	-21	kworker/u16:0+events_unbound	00:07:35	4
2476691	99	45	43,2	cyclictest	3033372	-21	kworker/u16:1+flush-8:0	23:57:38	4
2476691	99	44	42,2	cyclictest	2914415	-21	kworker/u16:3+events_unbound	23:20:02	4
2476691	99	44	41,2	cyclictest	2576149	-21	kworker/u16:0+events_unbound	21:07:24	4
2476691	99	43	41,2	cyclictest	2815759	-21	kworker/u16:0+events_unbound	21:49:51	4
2476691	99	43	40,2	cyclictest	3124884	-21	kworker/u16:0+events_unbound	00:22:23	4
2476702	99	42	41,0	cyclictest	0	-21	swapper/7	23:37:34	7
2476702	99	42	36,5	cyclictest	2681189	-21	latency_hist	20:47:09	7
2476691	99	42	40,2	cyclictest	2914415	-21	kworker/u16:3+events_unbound	23:43:35	4
2476691	99	42	40,2	cyclictest	2662126	-21	kworker/u16:1+events_unbound	21:45:52	4
2476691	99	42	39,2	cyclictest	2576149	-21	kworker/u16:0+events_unbound	20:57:22	4
2476691	99	41	39,2	cyclictest	3033372	-21	kworker/u16:1+events_unbound	00:17:31	4
2476691	99	41	39,2	cyclictest	2576149	-21	kworker/u16:0+events_unbound	21:37:07	4
2476691	99	41	39,2	cyclictest	2576149	-21	kworker/u16:0+events_unbound	21:37:07	4
2476691	99	41	38,2	cyclictest	2914415	-21	kworker/u16:3+events_unbound	00:27:18	4
2476691	99	40	38,2	cyclictest	3072353	-21	kworker/u16:2+events_unbound	23:34:59	4
2476691	99	40	38,2	cyclictest	3072353	-21	kworker/u16:2+events_unbound	23:34:59	4
2476691	99	40	38,2	cyclictest	3010206	-21	kworker/u16:2+events_unbound	23:15:29	4
2476691	99	40	38,2	cyclictest	2710001	-21	kworker/u16:2+events_unbound	21:13:30	4
2476691	99	40	38,2	cyclictest	2662126	-21	kworker/u16:1+events_unbound	21:37:42	4
2476691	99	40	38,2	cyclictest	2662126	-21	kworker/u16:1+events_unbound	21:18:44	4
2476691	99	40	38,2	cyclictest	2576149	-21	kworker/u16:0+events_unbound	21:32:06	4
2476691	99	40	38,2	cyclictest	2576149	-21	kworker/u16:0+events_unbound	21:05:15	4
2476691	99	40	37,2	cyclictest	2576149	-21	kworker/u16:0+events_unbound	20:07:23	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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