OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 100 highest latencies:

System rack7slot4s.osadl.org (updated Sun Feb 01, 2026 00:45:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2912	99	53	3,37	cyclictest	8047	-21	ssh	22:50:14	2
2896	99	49	18,21	cyclictest	12	-21	ksoftirqd/0	23:30:13	0
2896	99	49	1,38	cyclictest	20571	-21	ssh	23:15:11	0
2896	99	48	1,40	cyclictest	14750	-21	ssh	22:00:12	0
2912	99	47	2,38	cyclictest	0	-21	swapper/2	21:05:13	2
2912	99	45	21,13	cyclictest	0	-21	swapper/2	19:45:12	2
2904	99	45	2,8	cyclictest	13	1	rcu_preempt	19:20:13	1
2904	99	45	2,7	cyclictest	13	1	rcu_preempt	20:45:12	1
2912	99	44	0,28	cyclictest	14059	-21	rm	21:59:41	2
2896	99	44	2,32	cyclictest	30596	-21	ssh	21:15:12	0
2896	99	44	1,34	cyclictest	4327	-21	ssh	22:30:12	0
2912	99	43	1,38	cyclictest	3221	-21	apt-get	00:20:14	2
2912	99	43	0,37	cyclictest	24843	-21	apt-get	20:40:12	2
2904	99	43	4,28	cyclictest	1823	-21	sh	21:35:13	1
2896	99	43	3,28	cyclictest	2638	-21	ssh	23:05:15	0
2912	99	42	1,36	cyclictest	0	-21	swapper/2	19:50:12	2
2912	99	42	1,33	cyclictest	13986	-21	apt-get	19:55:13	2
2896	99	41	4,23	cyclictest	29589	-21	ssh	23:20:12	0
2896	99	41	2,25	cyclictest	21163	-21	diskmemload	21:45:12	0
2912	99	40	2,33	cyclictest	22468	-21	apt-get	22:40:15	2
2920	99	39	7,20	cyclictest	283	66	irq/58-eth0	23:35:12	3
2920	99	39	19,14	cyclictest	283	66	irq/58-eth0	22:50:13	3
2920	99	39	1,34	cyclictest	0	-21	swapper/3	22:00:11	3
2912	99	39	8,16	cyclictest	21030	-21	sh	23:31:41	2
2912	99	39	2,33	cyclictest	223	46	irq/40-dwc2_hso	22:05:12	2
2912	99	39	1,36	cyclictest	3262	-21	irqrtprio	23:05:21	2
2912	99	39	1,35	cyclictest	0	-21	swapper/2	21:40:15	2
2912	99	39	1,35	cyclictest	0	-21	swapper/2	21:40:14	2
2912	99	39	0,35	cyclictest	0	-21	swapper/2	19:25:12	2
2904	99	39	4,28	cyclictest	6221	-21	ssh	23:25:16	1
2904	99	39	4,28	cyclictest	6221	-21	ssh	23:25:16	1
2912	99	38	1,33	cyclictest	0	-21	swapper/2	23:35:11	2
2912	99	37	7,19	cyclictest	26084	-21	sh	00:14:55	2
2912	99	37	1,33	cyclictest	0	-21	swapper/2	00:30:13	2
2912	99	37	1,33	cyclictest	0	-21	swapper/2	00:30:13	2
2912	99	37	1,32	cyclictest	2692	-21	kthreadcore	20:15:21	2
2912	99	37	1,32	cyclictest	17486	-21	kthreadcore	20:30:20	2
2912	99	37	1,31	cyclictest	0	-21	swapper/2	23:10:14	2
2912	99	37	1,22	cyclictest	0	-21	swapper/2	23:42:14	2
2904	99	37	4,26	cyclictest	25222	-21	ssh	21:30:14	1
2904	99	37	10,20	cyclictest	26485	-21	kworker/u8:2	22:10:13	1
2904	99	37	10,20	cyclictest	26485	-21	kworker/u8:2	22:10:13	1
2896	99	37	3,30	cyclictest	23828	-21	ssh	22:05:13	0
2912	99	36	2,31	cyclictest	18628	-21	apt-get	22:20:13	2
2912	99	36	1,32	cyclictest	9341	-21	cat	22:15:02	2
2912	99	36	1,32	cyclictest	9341	-21	cat	22:15:01	2
2912	99	36	1,27	cyclictest	0	-21	swapper/2	21:50:11	2
2912	99	36	0,33	cyclictest	0	-21	swapper/2	19:40:12	2
2912	99	36	0,25	cyclictest	14645	-21	ssh	22:00:06	2
2912	99	36	0,20	cyclictest	21163	-21	diskmemload	21:26:02	2
2904	99	36	10,18	cyclictest	21	-21	ksoftirqd/1	21:05:13	1
2920	99	35	2,23	cyclictest	283	66	irq/58-eth0	23:30:12	3
2912	99	35	2,30	cyclictest	0	-21	swapper/2	21:10:13	2
2912	99	35	2,30	cyclictest	0	-21	swapper/2	21:10:13	2
2912	99	35	2,29	cyclictest	7234	-21	apt-get	21:20:12	2
2912	99	35	1,32	cyclictest	0	-21	swapper/2	22:30:26	2
2912	99	35	1,30	cyclictest	31528	-21	ssh	22:25:30	2
2912	99	35	0,32	cyclictest	12697	-21	apt-get	19:20:13	2
2920	99	34	1,19	cyclictest	283	66	irq/58-eth0	23:00:12	3
2912	99	34	2,13	cyclictest	20019	-21	sh	21:45:13	2
2912	99	34	1,30	cyclictest	8683	-21	cut	20:20:23	2
2912	99	34	1,30	cyclictest	30944	-21	usage_Anybus	00:15:30	2
2912	99	34	1,25	cyclictest	5511	-21	nfs4_client	20:50:23	2
2912	99	34	1,20	cyclictest	0	-21	swapper/2	00:26:15	2
2912	99	34	0,30	cyclictest	0	-21	swapper/2	20:05:12	2
2912	99	34	0,30	cyclictest	0	-21	swapper/2	19:15:13	2
2912	99	34	0,27	cyclictest	12485	-21	ssh	00:04:32	2
2912	99	33	1,28	cyclictest	6929	-21	ssh	23:25:22	2
2912	99	33	1,28	cyclictest	6929	-21	ssh	23:25:21	2
2912	99	33	1,28	cyclictest	0	-21	swapper/2	23:20:11	2
2912	99	33	1,24	cyclictest	2699	-21	/usr/sbin/munin	22:45:26	2
2912	99	33	0,29	cyclictest	1880	-21	ntp_states	21:15:27	2
2912	99	33	0,29	cyclictest	0	-21	swapper/2	22:55:13	2
2912	99	33	0,23	cyclictest	369	-21	usage_EthcTask	20:10:31	2
2912	99	33	0,21	cyclictest	27181	-21	rm	23:17:37	2
2904	99	33	0,26	cyclictest	0	-21	swapper/1	19:55:13	1
2920	99	32	3,20	cyclictest	283	66	irq/58-eth0	23:10:13	3
2912	99	32	1,28	cyclictest	30358	-21	ssh	21:30:53	2
2912	99	32	1,28	cyclictest	15254	-21	ssh	00:07:39	2
2912	99	32	1,28	cyclictest	15254	-21	ssh	00:07:39	2
2912	99	32	1,26	cyclictest	11721	-21	apt-get	21:00:12	2
2912	99	32	1,23	cyclictest	0	-21	swapper/2	19:30:13	2
2912	99	32	1,22	cyclictest	21160	-21	cut	20:00:21	2
2912	99	32	0,30	cyclictest	9407	-21	ssh	22:15:04	2
2912	99	32	0,29	cyclictest	223	46	irq/40-dwc2_hso	23:50:11	2
2912	99	32	0,29	cyclictest	0	-21	swapper/2	20:25:13	2
2912	99	32	0,24	cyclictest	19158	-21	ssh	22:36:40	2
2912	99	32	0,24	cyclictest	1207	-21	ssh	23:56:40	2
2904	99	32	2,19	cyclictest	21	-21	ksoftirqd/1	19:35:13	1
2896	99	32	1,27	cyclictest	788	-21	ssh	23:40:14	0
2920	99	31	1,26	cyclictest	0	-21	swapper/3	00:30:13	3
2920	99	31	1,26	cyclictest	0	-21	swapper/3	00:30:13	3
2912	99	31	4,19	cyclictest	31397	-21	cat	19:35:29	2
2912	99	31	16,11	cyclictest	0	-21	swapper/2	20:55:13	2
2912	99	31	1,27	cyclictest	9846	-21	/usr/sbin/munin	23:45:14	2
2912	99	31	1,27	cyclictest	1824	-21	ssh	21:35:12	2
2912	99	31	0,28	cyclictest	4279	-21	ssh	00:37:33	2
2912	99	31	0,28	cyclictest	26011	-21	ssh	23:00:10	2
2904	99	31	4,21	cyclictest	21595	-21	ssh	21:10:16	1
2904	99	31	4,21	cyclictest	21595	-21	ssh	21:10:15	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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