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 28, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2304121	2	59	48,7	sleep4	0	-21	swapper/4	19:04:11	4
2304121	2	59	48,7	sleep4	0	-21	swapper/4	19:04:11	4
2313066	2	49	14,30	sleep7	0	-21	swapper/7	19:06:07	7
2313066	2	49	14,30	sleep7	0	-21	swapper/7	19:06:07	7
2313189	2	47	37,7	sleep5	0	-21	swapper/5	19:07:49	5
2313189	2	47	37,7	sleep5	0	-21	swapper/5	19:07:49	5
2313577	99	40	38,2	cyclictest	2944807	-21	kworker/u16:4+flush-8:0	00:00:01	5
2313577	99	38	36,2	cyclictest	2527589	-21	kworker/u16:0+events_unbound	22:28:45	5
2313582	99	37	31,6	cyclictest	2881375	-21	kworker/u16:0+events_unbound	23:44:07	6
2313577	99	37	35,2	cyclictest	2834356	-21	kworker/u16:2+events_unbound	23:21:53	5
2313577	99	36	34,2	cyclictest	2881375	-21	kworker/u16:0+events_unbound	23:57:38	5
2313577	99	36	34,2	cyclictest	2788327	-21	kworker/u16:1+events_unbound	23:35:41	5
2313577	99	36	34,2	cyclictest	2739694	-21	kworker/u16:1+events_unbound	22:32:57	5
2313577	99	35	33,2	cyclictest	2981374	-21	kworker/u16:1+events_unbound	00:37:44	5
2313577	99	35	33,2	cyclictest	2834356	-21	kworker/u16:2+events_unbound	23:07:50	5
2313577	99	35	33,2	cyclictest	2470608	-21	kworker/u16:4+events_unbound	21:17:45	5
2313577	99	34	32,2	cyclictest	2981374	-21	kworker/u16:1+events_unbound	00:22:45	5
2313577	99	34	32,2	cyclictest	2680610	-21	kworker/u16:3+events_unbound	22:13:42	5
2313577	99	34	32,2	cyclictest	2527589	-21	kworker/u16:0+events_unbound	21:57:33	5
2313577	99	34	32,2	cyclictest	2480377	-21	kworker/u16:5+flush-8:0	21:29:45	5
2313577	99	33	31,2	cyclictest	2944807	-21	kworker/u16:4+events_unbound	00:16:06	5
2313577	99	33	31,2	cyclictest	2944807	-21	kworker/u16:4+events_unbound	00:07:42	5
2313577	99	33	31,2	cyclictest	2834356	-21	kworker/u16:2+events_unbound	23:54:01	5
2313577	99	33	31,2	cyclictest	2788327	-21	kworker/u16:1+events_unbound	23:02:14	5
2313577	99	33	31,2	cyclictest	2762307	-21	kworker/u16:2+events_unbound	22:56:05	5
2313577	99	33	31,2	cyclictest	2480377	-21	kworker/u16:5+events_unbound	22:23:50	5
2313577	99	33	31,2	cyclictest	2480377	-21	kworker/u16:5+events_unbound	21:47:45	5
2313577	99	33	31,2	cyclictest	2480377	-21	kworker/u16:5+events_unbound	21:36:34	5
2726349	2	32	0,1	chrt	2726347	-21	ssh	22:21:50	7
2313577	99	32	30,2	cyclictest	2910662	-21	kworker/u16:3+events_unbound	23:47:50	5
2313577	99	32	30,2	cyclictest	2834356	-21	kworker/u16:2+events_unbound	23:29:49	5
2313577	99	32	30,2	cyclictest	2527589	-21	kworker/u16:0+events_unbound	22:08:33	5
2313577	99	32	30,2	cyclictest	2480377	-21	kworker/u16:5+events_unbound	21:50:50	5
2313584	99	31	26,4	cyclictest	635	-21	systemd-journal	19:29:02	7
2313584	99	31	26,4	cyclictest	2583012	-21	latency_hist	21:24:08	7
2313577	99	31	29,2	cyclictest	2944807	-21	kworker/u16:4+events_unbound	00:33:01	5
2313577	99	31	29,2	cyclictest	2944807	-21	kworker/u16:4+events_unbound	00:27:38	5
2313577	99	31	29,2	cyclictest	2834356	-21	kworker/u16:2+events_unbound	23:41:37	5
2313577	99	31	29,2	cyclictest	2739694	-21	kworker/u16:1+events_unbound	22:40:42	5
2313577	99	31	29,2	cyclictest	2680610	-21	kworker/u16:3+events_unbound	22:35:06	5
2313577	99	31	29,2	cyclictest	2570992	-21	kworker/u16:1+events_unbound	22:04:04	5
2313577	99	31	29,2	cyclictest	2527589	-21	kworker/u16:0+events_unbound	22:50:25	5
2313577	99	31	29,2	cyclictest	2527589	-21	kworker/u16:0+events_unbound	21:11:33	5
2313584	99	30	25,4	cyclictest	635	-21	systemd-journal	21:39:07	7
2313577	99	30	28,2	cyclictest	2480377	-21	kworker/u16:5+events_unbound	21:20:41	5
2313582	99	29	27,2	cyclictest	2788327	-21	kworker/u16:1+events_unbound	23:04:21	6
2313577	99	29	27,2	cyclictest	2788327	-21	kworker/u16:1+events_unbound	23:15:20	5
2313577	99	29	27,2	cyclictest	2788327	-21	kworker/u16:1+events_unbound	23:12:14	5
2313573	99	29	27,2	cyclictest	2834356	-21	kworker/u16:2+events_unbound	00:16:20	4
2606872	2	28	0,1	chrt	2606870	-21	ssh	21:33:41	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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