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 Thu Jan 01, 2026 00:45:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
15739	99	63	1,20	cyclictest	0	-21	swapper/2	00:20:13	2
15739	99	63	1,20	cyclictest	0	-21	swapper/2	00:20:12	2
15726	99	63	3,48	cyclictest	3094	-21	ssh	23:20:14	1
15739	99	61	4,17	cyclictest	13	1	rcu_preempt	00:00:13	2
15739	99	61	24,21	cyclictest	27	-21	ksoftirqd/2	23:05:18	2
15739	99	55	1,41	cyclictest	7784	-21	ssh	21:50:09	2
15717	99	54	2,41	cyclictest	14415	-21	ssh	23:45:12	0
15726	99	53	3,42	cyclictest	5673	-21	ssh	23:40:12	1
15717	99	53	3,41	cyclictest	8124	-21	ssh	00:00:15	0
15726	99	51	3,38	cyclictest	28065	-21	ssh	22:20:12	1
15717	99	50	7,9	cyclictest	13	1	rcu_preempt	21:55:13	0
15717	99	48	35,8	cyclictest	13	1	rcu_preempt	22:50:12	0
15717	99	47	1,35	cyclictest	2028	-21	diskmemload	00:20:13	0
15717	99	47	1,35	cyclictest	2028	-21	diskmemload	00:20:12	0
15739	99	46	8,26	cyclictest	27	-21	ksoftirqd/2	22:30:13	2
15726	99	46	1,38	cyclictest	14789	-21	ssh	00:25:12	1
15717	99	46	3,36	cyclictest	19310	-21	ssh	22:15:12	0
15717	99	46	3,32	cyclictest	25418	-21	ssh	22:00:13	0
15739	99	44	1,33	cyclictest	0	-21	swapper/2	22:15:13	2
15739	99	42	1,24	cyclictest	23657	-21	ssh	00:30:13	2
15739	99	42	0,25	cyclictest	31563	-21	ssh	21:45:13	2
15717	99	42	1,34	cyclictest	23118	-21	ssh	23:50:15	0
15717	99	42	1,31	cyclictest	26830	-21	ssh	23:15:17	0
15751	99	41	3,22	cyclictest	283	66	irq/58-eth0	23:25:12	3
15726	99	40	1,31	cyclictest	7789	-21	ssh	21:50:11	1
15717	99	40	3,26	cyclictest	6855	-21	ssh	22:45:13	0
15717	99	39	12,20	cyclictest	12	-21	ksoftirqd/0	19:10:13	0
15739	99	38	4,26	cyclictest	27	-21	ksoftirqd/2	20:40:13	2
15739	99	38	11,11	cyclictest	0	-21	swapper/2	22:50:12	2
15739	99	37	4,14	cyclictest	27	-21	ksoftirqd/2	21:10:14	2
15726	99	37	1,30	cyclictest	584	-21	ssh	23:00:14	1
15717	99	36	1,26	cyclictest	2028	-21	diskmemload	21:30:14	0
15751	99	35	6,14	cyclictest	283	66	irq/58-eth0	23:00:12	3
15751	99	34	2,22	cyclictest	283	66	irq/58-eth0	23:45:13	3
15751	99	34	1,20	cyclictest	283	66	irq/58-eth0	00:25:13	3
15726	99	34	15,14	cyclictest	28467	-21	apt-get	20:30:13	1
15751	99	33	7,12	cyclictest	0	-21	swapper/3	21:50:11	3
15751	99	33	1,21	cyclictest	283	66	irq/58-eth0	23:55:11	3
15751	99	32	2,19	cyclictest	283	66	irq/58-eth0	23:05:18	3
15751	99	32	1,19	cyclictest	283	66	irq/58-eth0	21:15:15	3
15717	99	32	2,22	cyclictest	2412	-21	sh	21:10:12	0
15751	99	31	7,16	cyclictest	283	66	irq/58-eth0	21:40:14	3
15751	99	31	4,15	cyclictest	283	66	irq/58-eth0	20:00:13	3
15751	99	31	2,15	cyclictest	283	66	irq/58-eth0	22:20:13	3
15739	99	31	2,22	cyclictest	5680	-21	sh	23:40:13	2
15717	99	31	2,22	cyclictest	20028	-21	ssh	21:20:15	0
15751	99	30	13,8	cyclictest	0	-21	swapper/3	22:40:12	3
15739	99	30	1,18	cyclictest	1771	-21	ssh	22:05:14	2
15726	99	30	16,8	cyclictest	4285	-21	apt-get	20:05:14	1
15726	99	30	1,4	cyclictest	0	-21	swapper/1	19:30:13	1
15717	99	30	8,18	cyclictest	12	-21	ksoftirqd/0	21:05:14	0
15717	99	30	2,23	cyclictest	21033	-21	ssh	00:10:09	0
15717	99	30	2,22	cyclictest	26195	-21	ssh	23:14:51	0
15751	99	29	11,14	cyclictest	0	-21	swapper/3	21:10:12	3
15739	99	29	3,11	cyclictest	0	-21	swapper/2	23:53:51	2
15739	99	29	18,7	cyclictest	27	-21	ksoftirqd/2	22:00:12	2
15739	99	29	1,21	cyclictest	223	46	irq/40-dwc2_hso	00:15:13	2
15726	99	29	3,6	cyclictest	21	-21	ksoftirqd/1	23:55:01	1
15726	99	29	2,21	cyclictest	14042	-21	ssh	00:01:51	1
15726	99	29	20,4	cyclictest	842	-21	apt-get	20:35:15	1
15726	99	29	20,4	cyclictest	842	-21	apt-get	20:35:14	1
15717	99	29	16,8	cyclictest	2028	-21	diskmemload	00:35:14	0
15751	99	28	3,17	cyclictest	0	-21	swapper/3	23:14:51	3
15739	99	28	2,21	cyclictest	0	-21	swapper/2	20:50:14	2
15739	99	28	2,20	cyclictest	0	-21	swapper/2	19:30:13	2
15726	99	28	3,20	cyclictest	9359	-21	ssh	23:05:17	1
15726	99	28	2,21	cyclictest	23627	-21	ssh	22:54:39	1
15726	99	28	21,3	cyclictest	23635	-21	apt-get	20:25:15	1
15726	99	28	21,3	cyclictest	15970	-21	apt-get	19:10:13	1
15726	99	28	16,5	cyclictest	29864	-21	apt-get	21:05:13	1
15726	99	28	14,9	cyclictest	13062	-21	apt-get	22:30:13	1
15717	99	28	6,4	cyclictest	13	1	rcu_preempt	23:05:32	0
15717	99	28	2,21	cyclictest	20086	-21	ssh	23:29:52	0
15751	99	27	8,11	cyclictest	0	-21	swapper/3	22:35:11	3
15751	99	27	7,11	cyclictest	0	-21	swapper/3	22:53:39	3
15739	99	27	3,8	cyclictest	0	-21	swapper/2	20:10:17	2
15739	99	27	3,19	cyclictest	0	-21	swapper/2	23:32:51	2
15739	99	27	3,13	cyclictest	223	46	irq/40-dwc2_hso	19:55:13	2
15739	99	27	2,10	cyclictest	0	-21	swapper/2	21:30:14	2
15739	99	27	1,8	cyclictest	27	-21	ksoftirqd/2	20:25:14	2
15726	99	27	9,12	cyclictest	2402	-21	apt-get	21:10:12	1
15726	99	27	15,5	cyclictest	0	-21	swapper/1	23:25:12	1
15751	99	26	3,16	cyclictest	283	66	irq/58-eth0	00:10:09	3
15739	99	26	3,18	cyclictest	0	-21	swapper/2	23:29:52	2
15739	99	26	3,14	cyclictest	223	46	irq/40-dwc2_hso	20:55:12	2
15739	99	26	3,13	cyclictest	24298	-21	ssh	22:55:13	2
15739	99	26	2,10	cyclictest	0	-21	swapper/2	19:15:12	2
15739	99	26	1,5	cyclictest	31115	-21	sh	21:45:01	2
15739	99	26	1,14	cyclictest	599	-21	ssh	23:00:14	2
15726	99	26	4,4	cyclictest	0	-21	swapper/1	22:08:03	1
15726	99	26	2,17	cyclictest	24297	-21	diskmemload	22:55:13	1
15717	99	26	7,4	cyclictest	13	1	rcu_preempt	22:35:13	0
15717	99	26	2,5	cyclictest	28060	-21	apt-get	22:20:14	0
15717	99	26	1,16	cyclictest	20658	-21	ssh	23:30:15	0
15751	99	25	9,12	cyclictest	0	-21	swapper/3	21:55:13	3
15751	99	25	16,5	cyclictest	0	-21	swapper/3	21:20:15	3
15739	99	25	3,7	cyclictest	0	-21	swapper/2	00:08:01	2
15739	99	25	2,16	cyclictest	223	46	irq/40-dwc2_hso	19:35:15	2
15739	99	25	1,17	cyclictest	223	46	irq/40-dwc2_hso	20:05:12	2
15739	99	25	10,13	cyclictest	26821	-21	cron	19:55:01	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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