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 Tue Apr 07, 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
2606799	2	54	44,7	sleep6	0	-21	swapper/6	07:01:23	6
2606768	2	51	41,7	sleep5	0	-21	swapper/5	07:00:57	5
2607152	99	49	43,5	cyclictest	2648962	-21	latency_hist	07:22:15	7
2607147	99	48	46,2	cyclictest	3011054	-21	kworker/u16:0+events_unbound	10:27:16	6
2606815	2	48	38,7	sleep4	0	-21	swapper/4	07:01:37	4
2607152	99	46	41,3	cyclictest	2724422	-21	ntpq	07:57:40	7
2607147	99	44	42,2	cyclictest	3206144	-21	kworker/u16:0+events_unbound	11:43:17	6
2607147	99	44	42,2	cyclictest	1052047	-21	kworker/u16:3+events_unbound	09:10:28	6
2607147	99	44	41,2	cyclictest	3048019	-21	kworker/u16:2+events_unbound	11:12:17	6
2607152	99	43	42,0	cyclictest	0	-21	swapper/7	11:35:32	7
2607146	99	43	41,2	cyclictest	3082850	-21	kworker/u16:0+events_unbound	10:40:08	5
2607147	99	42	40,2	cyclictest	3192143	-21	kworker/u16:5+events_unbound	12:14:04	6
2607147	99	42	40,2	cyclictest	3082850	-21	kworker/u16:0+events_unbound	11:21:32	6
2607147	99	42	40,2	cyclictest	2934757	-21	kworker/u16:2+events_unbound	09:56:17	6
2607147	99	42	40,2	cyclictest	2802055	-21	kworker/u16:1+events_unbound	09:04:01	6
2607147	99	42	40,2	cyclictest	2802055	-21	kworker/u16:1+events_unbound	09:04:01	6
2607147	99	42	39,2	cyclictest	3048019	-21	kworker/u16:2+events_unbound	11:02:17	6
2607147	99	42	39,2	cyclictest	3048019	-21	kworker/u16:2+events_unbound	11:02:17	6
2607146	99	42	40,2	cyclictest	2802055	-21	kworker/u16:1+events_unbound	09:34:49	5
2607152	99	41	40,0	cyclictest	0	-21	swapper/7	09:20:28	7
2607152	99	41	36,4	cyclictest	3303613	-21	latency_hist	12:12:15	7
2607147	99	41	39,2	cyclictest	3206144	-21	kworker/u16:0+events_unbound	12:10:33	6
2607147	99	41	39,2	cyclictest	2888957	-21	kworker/u16:4+events_unbound	10:53:41	6
2607147	99	41	39,2	cyclictest	2802055	-21	kworker/u16:1+events_unbound	09:37:02	6
2607146	99	41	39,2	cyclictest	2578409	-21	kworker/u16:2+events_unbound	07:02:37	5
2607152	99	40	39,0	cyclictest	0	-21	swapper/7	11:20:17	7
2607147	99	40	38,2	cyclictest	3192143	-21	kworker/u16:5+events_unbound	11:58:57	6
2607147	99	40	38,2	cyclictest	3192143	-21	kworker/u16:5+events_unbound	11:35:24	6
2607147	99	40	38,2	cyclictest	3082850	-21	kworker/u16:0+events_unbound	10:58:40	6
2607147	99	40	38,2	cyclictest	3011054	-21	kworker/u16:0+events_unbound	10:20:41	6
2607147	99	40	38,2	cyclictest	2974322	-21	kworker/u16:1+events_unbound	10:14:20	6
2607147	99	40	38,2	cyclictest	2888957	-21	kworker/u16:4+events_unbound	10:32:17	6
2607147	99	40	38,2	cyclictest	2802055	-21	kworker/u16:1+events_unbound	09:24:57	6
2607146	99	40	38,2	cyclictest	3243072	-21	kworker/u16:2+events_unbound	12:00:43	5
2607146	99	40	38,2	cyclictest	3220503	-21	kworker/u16:1+events_unbound	11:48:45	5
2607146	99	40	38,2	cyclictest	3206144	-21	kworker/u16:0+events_unbound	12:10:56	5
2607146	99	40	38,2	cyclictest	3192143	-21	kworker/u16:5+events_unbound	11:40:41	5
2607146	99	40	38,2	cyclictest	2802055	-21	kworker/u16:1+events_unbound	09:02:56	5
2607146	99	40	38,2	cyclictest	2802055	-21	kworker/u16:1+events_unbound	09:02:56	5
2607152	99	39	36,2	cyclictest	2925394	-21	ssh	09:36:53	7
2607152	99	39	35,3	cyclictest	3071421	-21	ssh	10:36:17	7
2607147	99	39	37,2	cyclictest	3243072	-21	kworker/u16:2+events_unbound	12:23:52	6
2607147	99	39	37,2	cyclictest	3206144	-21	kworker/u16:0+events_unbound	12:06:01	6
2607147	99	39	37,2	cyclictest	3192142	-21	kworker/u16:4+events_unbound	11:31:24	6
2607147	99	39	37,2	cyclictest	2744861	-21	kworker/u16:0+events_unbound	09:44:01	6
2607147	99	39	37,2	cyclictest	2744861	-21	kworker/u16:0+events_unbound	09:44:01	6
2607146	99	39	37,2	cyclictest	3082850	-21	kworker/u16:0+events_unbound	10:59:48	5
2607146	99	39	37,2	cyclictest	2888957	-21	kworker/u16:4+events_unbound	09:38:44	5
2607146	99	39	37,2	cyclictest	2744861	-21	kworker/u16:0+events_unbound	09:17:06	5
2607146	99	39	37,2	cyclictest	1052047	-21	kworker/u16:3+events_unbound	07:47:38	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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