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 Mar 21, 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
3376963	2	51	41,7	sleep6	0	-21	swapper/6	19:02:49	6
3376963	2	51	41,7	sleep6	0	-21	swapper/6	19:02:49	6
3376744	2	51	41,7	sleep5	0	-21	swapper/5	18:59:43	5
3376744	2	51	41,7	sleep5	0	-21	swapper/5	18:59:43	5
3376990	2	48	38,7	sleep4	0	-21	swapper/4	19:03:11	4
3376990	2	48	38,7	sleep4	0	-21	swapper/4	19:03:11	4
3377311	99	46	41,4	cyclictest	3693561	-21	latency_hist	21:38:24	7
3377311	99	46	41,4	cyclictest	3693561	-21	latency_hist	21:38:24	7
3377311	99	41	36,4	cyclictest	3872075	-21	latency_hist	22:53:24	7
3368666	2	40	2,32	sleep7	0	-21	swapper/7	18:58:41	7
3368666	2	40	2,32	sleep7	0	-21	swapper/7	18:58:41	7
3377308	99	37	35,2	cyclictest	3824567	-21	kworker/u16:3+events_unbound	23:13:53	6
3753343	2	33	0,1	chrt	0	-21	swapper/6	22:03:25	6
3377311	99	33	30,2	cyclictest	902	-21	dbus-daemon	23:28:24	7
3633943	2	30	0,1	sleep6	0	-21	swapper/6	21:13:24	6
3377311	99	30	29,0	cyclictest	0	-21	swapper/7	22:18:46	7
3377311	99	30	23,5	cyclictest	650	-21	systemd-journal	21:58:25	7
3377308	99	30	28,2	cyclictest	3657848	-21	kworker/u16:4+events_unbound	21:38:46	6
3377308	99	30	26,3	cyclictest	3349714	-21	kworker/u16:0+events_unbound	20:18:37	6
3377302	99	30	27,2	cyclictest	3824567	-21	kworker/u16:3+events_unbound	23:23:39	4
3377308	99	29	27,2	cyclictest	3967230	-21	kworker/u16:2+events_unbound	23:33:49	6
3377308	99	29	27,2	cyclictest	3967230	-21	kworker/u16:2+events_unbound	23:33:49	6
3377308	99	29	26,2	cyclictest	3824567	-21	kworker/u16:3+flush-8:0	22:43:40	6
3377311	99	28	23,4	cyclictest	3919746	-21	latency_hist	23:13:24	7
3377302	99	28	25,2	cyclictest	4048422	-21	kworker/u16:4+flush-8:0	00:13:23	4
3377311	99	27	25,1	cyclictest	0	-21	swapper/7	22:08:42	7
3377311	99	27	24,2	cyclictest	3429793	-21	hddtemp_smartct	19:28:39	7
3377308	99	27	25,2	cyclictest	3848480	-21	kworker/u16:1+events_unbound	22:58:46	6
3377308	99	27	25,2	cyclictest	3572211	-21	kworker/u16:1+flush-8:0	22:04:37	6
3377311	99	26	0,24	cyclictest	3485930	-21	latency_hist	19:58:24	7
3377308	99	26	23,2	cyclictest	4048422	-21	kworker/u16:4+flush-8:0	00:13:39	6
3377308	99	26	22,3	cyclictest	3943441	-21	kworker/u16:0+flush-8:0	00:28:42	6
3377302	99	26	23,3	cyclictest	3349714	-21	kworker/u16:0+events_unbound	19:43:50	4
3377308	99	25	24,1	cyclictest	3349714	-21	kworker/u16:0+events_unbound	21:34:05	6
3377308	99	25	24,1	cyclictest	3349714	-21	kworker/u16:0+events_unbound	21:34:05	6
3377302	99	25	23,2	cyclictest	3505379	-21	kworker/u16:2+events_unbound	20:38:50	4
3377308	99	24	22,2	cyclictest	3505379	-21	kworker/u16:2+flush-8:0	20:13:40	6
3377308	99	24	20,3	cyclictest	3943441	-21	kworker/u16:0+flush-8:0	00:18:29	6
3377302	99	24	22,2	cyclictest	3349714	-21	kworker/u16:0+events_unbound	21:38:37	4
3377311	99	23	22,0	cyclictest	0	-21	swapper/7	19:13:42	7
3377311	99	23	22,0	cyclictest	0	-21	swapper/7	00:03:40	7
3377311	99	23	21,1	cyclictest	0	-21	swapper/7	21:08:41	7
3377308	99	23	20,2	cyclictest	3728156	-21	kworker/u16:3+flush-8:0	21:53:24	6
3377311	99	22	22,0	cyclictest	0	-21	swapper/7	23:58:45	7
3377311	99	22	21,0	cyclictest	0	-21	swapper/7	23:28:44	7
3377311	99	22	19,2	cyclictest	3941131	-21	ssh	23:18:53	7
3377308	99	22	20,2	cyclictest	3349714	-21	kworker/u16:0+events_unbound	19:43:38	6
3377308	99	22	19,2	cyclictest	3715400	-21	kworker/u16:2+flush-8:0	21:48:24	6
3377302	99	22	20,2	cyclictest	3801198	-21	kworker/u16:1+events_unbound	22:23:39	4
3377311	99	21	19,1	cyclictest	0	-21	swapper/7	20:28:25	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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