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 Fri Jan 02, 2026 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
318090	2	58	47,8	sleep6	0	-21	swapper/6	07:07:49	6
318090	2	58	47,8	sleep6	0	-21	swapper/6	07:07:49	6
308884	2	57	21,30	sleep7	0	-21	swapper/7	07:03:48	7
308884	2	57	21,30	sleep7	0	-21	swapper/7	07:03:48	7
318097	2	52	41,7	sleep4	0	-21	swapper/4	07:07:55	4
318097	2	52	41,7	sleep4	0	-21	swapper/4	07:07:55	4
318460	99	44	41,2	cyclictest	3796678	-21	kworker/u16:1+events_unbound	07:08:51	5
318460	99	40	38,2	cyclictest	691178	-21	kworker/u16:1+flush-8:0	10:33:35	5
318060	2	40	30,7	sleep5	0	-21	swapper/5	07:07:23	5
318060	2	40	30,7	sleep5	0	-21	swapper/5	07:07:23	5
318455	99	39	36,2	cyclictest	623060	-21	kworker/u16:2+events_unbound	10:29:00	4
318466	99	35	0,34	cyclictest	327978	-21	latency_hist	07:13:37	7
318466	99	32	26,5	cyclictest	904481	-21	latency_hist	12:08:35	7
318460	99	32	30,2	cyclictest	865931	-21	kworker/u16:1+events_unbound	11:53:31	5
318455	99	30	28,2	cyclictest	924284	-21	kworker/u16:1+events_unbound	12:29:27	4
318455	99	30	28,2	cyclictest	304288	-21	kworker/u16:3+events_unbound	08:18:31	4
318460	99	29	28,1	cyclictest	477456	-21	kworker/u16:2+events_unbound	08:46:12	5
318460	99	29	27,2	cyclictest	802308	-21	kworker/u16:3+events_unbound	12:29:05	5
318460	99	29	27,2	cyclictest	477456	-21	kworker/u16:2+events_unbound	08:55:17	5
681626	2	28	0,0	chrt	0	-21	swapper/6	10:13:36	6
318466	99	27	26,0	cyclictest	0	-21	swapper/7	08:28:49	7
318466	99	27	23,3	cyclictest	5967	-21	gnome-software	09:58:31	7
318460	99	27	25,2	cyclictest	836723	-21	kworker/u16:0+events_unbound	11:46:47	5
318460	99	26	24,2	cyclictest	427952	-21	kworker/u16:4+events_unbound	08:40:40	5
318455	99	26	24,2	cyclictest	720652	-21	kworker/u16:0+events_unbound	10:43:30	4
318455	99	26	24,2	cyclictest	720652	-21	kworker/u16:0+events_unbound	10:43:30	4
318466	99	25	24,0	cyclictest	0	-21	swapper/7	07:16:32	7
318460	99	25	23,2	cyclictest	802308	-21	kworker/u16:3+events_unbound	12:37:16	5
318460	99	25	23,2	cyclictest	652474	-21	kworker/u16:4+events_unbound	10:02:47	5
318460	99	25	23,2	cyclictest	623060	-21	kworker/u16:2+events_unbound	11:29:06	5
318460	99	25	23,2	cyclictest	3796678	-21	kworker/u16:1+events_unbound	08:08:43	5
318460	99	25	23,2	cyclictest	3045789	-21	kworker/u16:5+events_unbound	07:26:11	5
318455	99	25	23,2	cyclictest	411091	-21	kworker/u16:2+events_unbound	07:55:47	4
318455	99	25	23,2	cyclictest	3045789	-21	kworker/u16:5+events_unbound	07:08:55	4
318460	99	24	22,2	cyclictest	427952	-21	kworker/u16:4+events_unbound	08:51:48	5
318455	99	24	22,2	cyclictest	836723	-21	kworker/u16:0+events_unbound	12:10:16	4
318455	99	24	22,2	cyclictest	652474	-21	kworker/u16:4+events_unbound	10:13:16	4
318455	99	24	22,2	cyclictest	564792	-21	kworker/u16:2+events_unbound	09:21:48	4
318466	99	23	18,4	cyclictest	962697	-21	latency_hist	12:38:36	7
318460	99	23	21,2	cyclictest	3796678	-21	kworker/u16:1+events_unbound	08:00:36	5
318455	99	23	21,2	cyclictest	865931	-21	kworker/u16:1+events_unbound	11:53:33	4
318455	99	23	21,2	cyclictest	802308	-21	kworker/u16:3+events_unbound	11:33:16	4
318460	99	22	20,2	cyclictest	545494	-21	kworker/u16:3+events_unbound	09:22:12	5
318460	99	22	20,2	cyclictest	458381	-21	kworker/u16:0+events_unbound	09:39:47	5
318455	99	22	20,2	cyclictest	802309	-21	kworker/u16:4+events_unbound	11:16:16	4
318455	99	22	20,2	cyclictest	652474	-21	kworker/u16:4+events_unbound	10:05:47	4
318455	99	22	20,2	cyclictest	427952	-21	kworker/u16:4+events_unbound	08:29:28	4
318455	99	22	20,2	cyclictest	3796678	-21	kworker/u16:1+events_unbound	07:49:10	4
318466	99	21	20,0	cyclictest	0	-21	swapper/7	11:19:00	7
318466	99	21	20,0	cyclictest	0	-21	swapper/7	08:18:51	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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