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
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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 Fri Jul 31, 2026 00:45:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
5850	99	66	1,51	cyclictest	31458	-21	ssh	23:20:13	2
5858	99	54	42,5	cyclictest	359	66	irq/58-eth0	23:15:13	3
5850	99	54	1,33	cyclictest	22526	-21	ssh	21:45:14	2
5839	99	49	1,38	cyclictest	862	-21	ssh	21:15:15	1
5858	99	48	6,24	cyclictest	359	66	irq/58-eth0	23:20:13	3
5850	99	46	9,10	cyclictest	13	1	rcu_preempt	19:15:14	2
5858	99	45	2,29	cyclictest	359	66	irq/58-eth0	00:25:14	3
5858	99	45	1,26	cyclictest	359	66	irq/58-eth0	00:15:14	3
5858	99	45	1,26	cyclictest	359	66	irq/58-eth0	00:15:13	3
5830	99	45	4,34	cyclictest	8102	-21	ssh	21:55:14	0
5830	99	44	1,36	cyclictest	73	-21	kswapd0	23:35:12	0
5839	99	43	1,32	cyclictest	6341	-21	ssh	22:30:12	1
5858	99	42	22,12	cyclictest	359	66	irq/58-eth0	00:00:13	3
5839	99	41	2,25	cyclictest	24158	-21	ssh	00:10:17	1
5850	99	40	2,16	cyclictest	2620	-21	ssh	22:10:11	2
5850	99	38	2,19	cyclictest	20635	-21	ssh	22:20:09	2
5839	99	38	1,4	cyclictest	13	1	rcu_preempt	21:55:14	1
5858	99	37	9,18	cyclictest	359	66	irq/58-eth0	22:55:14	3
5858	99	37	1,22	cyclictest	359	66	irq/58-eth0	22:35:13	3
5839	99	36	5,7	cyclictest	13	1	rcu_preempt	20:35:12	1
5839	99	36	31,2	cyclictest	21	-21	ksoftirqd/1	22:05:13	1
5850	99	35	15,12	cyclictest	27	-21	ksoftirqd/2	00:15:12	2
5850	99	35	15,12	cyclictest	27	-21	ksoftirqd/2	00:15:11	2
5839	99	35	3,28	cyclictest	27927	-21	ssh	23:00:17	1
5858	99	34	2,19	cyclictest	359	66	irq/58-eth0	20:20:13	3
5858	99	33	12,13	cyclictest	359	66	irq/58-eth0	21:20:13	3
5850	99	33	2,15	cyclictest	18754	-21	ssh	21:25:09	2
5850	99	33	2,15	cyclictest	18754	-21	ssh	21:25:09	2
5830	99	33	16,7	cyclictest	0	-21	swapper/0	00:20:14	0
5858	99	32	3,19	cyclictest	359	66	irq/58-eth0	23:25:15	3
5850	99	32	2,4	cyclictest	13	1	rcu_preempt	22:00:14	2
5850	99	32	2,14	cyclictest	27030	-21	ssh	23:52:27	2
5830	99	32	24,6	cyclictest	15	1	rcuc/0	22:00:14	0
5858	99	31	3,17	cyclictest	0	-21	swapper/3	00:35:13	3
5858	99	31	15,11	cyclictest	359	66	irq/58-eth0	21:15:16	3
5850	99	31	2,23	cyclictest	9908	-21	ssh	21:20:14	2
5839	99	31	2,25	cyclictest	29550	-21	ssh	23:55:13	1
5830	99	31	3,19	cyclictest	9870	-21	ssh	22:50:12	0
5830	99	31	1,27	cyclictest	27918	-21	ssh	23:00:16	0
5858	99	30	3,15	cyclictest	359	66	irq/58-eth0	22:45:12	3
5858	99	30	3,15	cyclictest	359	66	irq/58-eth0	22:45:12	3
5850	99	30	2,19	cyclictest	273	46	irq/40-dwc2_hso	20:50:12	2
5850	99	30	2,19	cyclictest	273	46	irq/40-dwc2_hso	19:55:14	2
5850	99	30	2,19	cyclictest	273	46	irq/40-dwc2_hso	19:55:14	2
5839	99	30	9,18	cyclictest	15329	-21	ssh	22:35:13	1
5839	99	30	2,7	cyclictest	13	1	rcu_preempt	23:35:12	1
5839	99	30	1,21	cyclictest	21	-21	ksoftirqd/1	21:20:13	1
5858	99	29	4,15	cyclictest	359	66	irq/58-eth0	22:20:12	3
5850	99	29	2,21	cyclictest	0	-21	swapper/2	19:35:14	2
5850	99	29	2,20	cyclictest	0	-21	swapper/2	23:40:14	2
5850	99	29	1,13	cyclictest	29701	-21	ssh	22:25:12	2
5830	99	29	4,16	cyclictest	24337	-21	ssh	22:40:12	0
5830	99	29	4,13	cyclictest	4425	-21	ssh	00:35:13	0
5830	99	29	14,3	cyclictest	13	1	rcu_preempt	21:30:13	0
5858	99	28	2,6	cyclictest	0	-21	swapper/3	00:20:14	3
5850	99	28	9,12	cyclictest	0	-21	swapper/2	00:05:14	2
5850	99	28	3,17	cyclictest	273	46	irq/40-dwc2_hso	23:15:15	2
5850	99	28	2,22	cyclictest	27833	-21	ssh	21:30:14	2
5839	99	28	4,7	cyclictest	13	1	rcu_preempt	21:00:13	1
5830	99	28	11,12	cyclictest	12	-21	ksoftirqd/0	23:06:08	0
5850	99	27	2,14	cyclictest	858	-21	ssh	21:15:15	2
5850	99	27	1,20	cyclictest	18760	-21	ssh	00:25:15	2
5850	99	27	1,17	cyclictest	273	46	irq/40-dwc2_hso	20:40:12	2
5839	99	27	1,6	cyclictest	15624	-21	timerwakeupswit	23:45:29	1
5839	99	27	1,6	cyclictest	15624	-21	timerwakeupswit	23:45:29	1
5830	99	27	3,3	cyclictest	839	-21	apt-get	21:15:15	0
5830	99	27	3,19	cyclictest	6127	-21	ssh	00:00:13	0
5830	99	27	2,22	cyclictest	0	-21	swapper/0	19:55:14	0
5830	99	27	2,22	cyclictest	0	-21	swapper/0	19:55:14	0
5858	99	26	11,9	cyclictest	359	66	irq/58-eth0	23:55:14	3
5850	99	26	3,16	cyclictest	273	46	irq/40-dwc2_hso	21:50:14	2
5850	99	26	1,19	cyclictest	27915	-21	apt-get	23:00:17	2
5839	99	26	0,17	cyclictest	73	-21	kswapd0	22:25:12	1
5830	99	26	3,4	cyclictest	13	1	rcu_preempt	22:10:13	0
5830	99	26	2,21	cyclictest	693	-21	ssh	00:15:12	0
5830	99	26	2,21	cyclictest	693	-21	ssh	00:15:12	0
5830	99	26	2,18	cyclictest	0	-21	swapper/0	22:55:09	0
5830	99	26	1,21	cyclictest	31443	-21	ssh	23:20:12	0
5858	99	25	4,9	cyclictest	32	1	rcuc/3	20:50:11	3
5858	99	25	3,15	cyclictest	0	-21	swapper/3	22:00:14	3
5850	99	25	9,13	cyclictest	18341	-21	cron	00:25:01	2
5850	99	25	6,15	cyclictest	0	-21	swapper/2	23:30:13	2
5850	99	25	2,8	cyclictest	30633	-21	ssh	00:12:30	2
5850	99	25	2,11	cyclictest	13496	-21	ssh	23:10:13	2
5850	99	25	11,11	cyclictest	0	-21	swapper/2	20:30:17	2
5839	99	25	2,18	cyclictest	22527	-21	ssh	21:45:13	1
5839	99	25	1,8	cyclictest	13	1	rcu_preempt	19:40:12	1
5858	99	24	2,16	cyclictest	0	-21	swapper/3	00:05:14	3
5858	99	24	15,7	cyclictest	0	-21	swapper/3	21:30:15	3
5858	99	24	10,8	cyclictest	359	66	irq/58-eth0	23:50:13	3
5850	99	24	2,16	cyclictest	0	-21	swapper/2	23:35:09	2
5850	99	24	2,16	cyclictest	0	-21	swapper/2	21:40:09	2
5850	99	24	2,10	cyclictest	18895	-21	ssh	22:55:14	2
5850	99	24	13,9	cyclictest	20682	-21	ssh	22:36:10	2
5850	99	24	12,10	cyclictest	10490	-21	sshd	21:36:56	2
5850	99	24	1,19	cyclictest	0	-21	swapper/2	23:45:13	2
5850	99	24	1,19	cyclictest	0	-21	swapper/2	23:45:13	2
5839	99	24	4,15	cyclictest	2654	-21	ssh	22:10:13	1
5839	99	24	2,8	cyclictest	4373	-21	ssh	21:35:10	1
5830	99	24	2,20	cyclictest	11554	-21	ssh	23:45:12	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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