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 May 01, 2026 00:45:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
25433	99	72	3,62	cyclictest	4853	-21	ssh	22:00:12	1
25433	99	71	22,8	cyclictest	21	-21	ksoftirqd/1	19:40:12	1
25447	99	60	38,11	cyclictest	359	66	irq/58-eth0	23:10:15	3
25433	99	60	3,47	cyclictest	29733	-21	ssh	21:20:12	1
25447	99	56	31,12	cyclictest	359	66	irq/58-eth0	21:25:14	3
25433	99	56	2,38	cyclictest	7727	-21	ssh	00:10:09	1
25438	99	55	18,33	cyclictest	13	1	rcu_preempt	00:30:13	2
25433	99	55	22,22	cyclictest	21	-21	ksoftirqd/1	19:15:12	1
25447	99	54	26,17	cyclictest	359	66	irq/58-eth0	21:20:13	3
25425	99	53	1,38	cyclictest	30143	-21	ssh	22:50:12	0
25425	99	52	1,44	cyclictest	10063	-21	ssh	21:45:11	0
25438	99	50	4,31	cyclictest	8836	-21	ssh	23:50:14	2
25438	99	50	1,31	cyclictest	1427	-21	ssh	23:10:14	2
25433	99	50	4,6	cyclictest	13	1	rcu_preempt	23:20:12	1
25425	99	50	2,38	cyclictest	15823	-21	ssh	23:00:14	0
25433	99	49	4,7	cyclictest	13	1	rcu_preempt	21:00:13	1
25447	99	45	3,24	cyclictest	359	66	irq/58-eth0	22:40:13	3
25447	99	44	3,25	cyclictest	359	66	irq/58-eth0	23:20:14	3
25447	99	44	23,11	cyclictest	359	66	irq/58-eth0	21:40:11	3
25433	99	44	7,25	cyclictest	8547	-21	ssh	22:20:13	1
25433	99	44	2,37	cyclictest	12138	-21	ssh	22:40:14	1
25425	99	43	28,9	cyclictest	24561	-21	apt-get	20:50:14	0
25425	99	43	27,10	cyclictest	523	-21	apt-get	20:25:13	0
25433	99	42	6,22	cyclictest	753	-21	sendmail-mta	20:55:14	1
25425	99	42	33,5	cyclictest	7717	-21	apt-get	00:10:09	0
25425	99	42	2,28	cyclictest	14201	-21	rm	23:35:14	0
25425	99	42	21,14	cyclictest	0	-21	swapper/0	00:35:12	0
25447	99	41	2,24	cyclictest	359	66	irq/58-eth0	23:55:12	3
25438	99	41	1,27	cyclictest	29739	-21	ssh	21:20:13	2
25425	99	41	28,8	cyclictest	0	-21	swapper/0	23:25:11	0
25433	99	40	6,27	cyclictest	11263	-21	diskmemload	21:40:12	1
25433	99	40	4,25	cyclictest	24836	-21	ssh	23:05:16	1
25425	99	40	4,26	cyclictest	6310	-21	ssh	21:25:14	0
25447	99	36	2,21	cyclictest	359	66	irq/58-eth0	21:10:13	3
25425	99	36	7,23	cyclictest	12	-21	ksoftirqd/0	21:35:12	0
25425	99	36	28,3	cyclictest	13910	-21	apt-get	22:05:13	0
25447	99	35	3,18	cyclictest	0	-21	swapper/3	22:00:13	3
25425	99	35	7,22	cyclictest	21170	-21	ssh	22:45:13	0
25425	99	35	28,4	cyclictest	29414	-21	apt-get	20:55:12	0
25425	99	35	28,3	cyclictest	1405	-21	apt-get	23:10:14	0
25425	99	35	25,6	cyclictest	26927	-21	apt-get	19:45:12	0
25425	99	34	8,16	cyclictest	664	-21	ntpd	21:30:14	0
25425	99	34	5,9	cyclictest	9772	-21	users	22:00:32	0
25425	99	34	26,5	cyclictest	24809	-21	apt-get	23:05:15	0
25425	99	34	24,5	cyclictest	30466	-21	apt-get	19:15:12	0
25438	99	33	0,28	cyclictest	616	-21	systemd-logind	23:06:48	2
25425	99	33	26,4	cyclictest	22107	-21	apt-get	19:40:13	0
25425	99	33	1,27	cyclictest	11655	-21	ssh	21:10:12	0
25438	99	32	5,13	cyclictest	930	-21	snmpd	19:45:12	2
25438	99	32	2,8	cyclictest	0	-21	swapper/2	22:57:52	2
25425	99	32	25,3	cyclictest	19467	-21	apt-get	23:20:13	0
25425	99	32	2,23	cyclictest	12123	-21	ssh	22:40:12	0
25447	99	31	3,21	cyclictest	359	66	irq/58-eth0	23:05:15	3
25447	99	31	2,12	cyclictest	359	66	irq/58-eth0	22:50:12	3
25438	99	31	2,8	cyclictest	0	-21	swapper/2	00:10:09	2
25438	99	31	1,18	cyclictest	959	-21	rm	21:40:13	2
25425	99	31	25,3	cyclictest	1818	-21	apt-get	21:00:14	0
25425	99	31	25,2	cyclictest	20649	-21	apt-get	21:15:14	0
25425	99	31	19,8	cyclictest	17278	-21	apt-get	19:35:11	0
25425	99	31	17,11	cyclictest	0	-21	swapper/0	00:00:13	0
25447	99	30	14,10	cyclictest	359	66	irq/58-eth0	00:25:16	3
25433	99	30	3,21	cyclictest	17806	-21	ssh	23:55:14	1
25425	99	30	7,15	cyclictest	0	-21	swapper/0	22:55:13	0
25425	99	30	5,10	cyclictest	24339	-21	rm	23:57:36	0
25425	99	30	15,11	cyclictest	0	-21	swapper/0	22:20:11	0
25447	99	29	5,13	cyclictest	359	66	irq/58-eth0	23:50:14	3
25447	99	29	16,9	cyclictest	359	66	irq/58-eth0	22:45:14	3
25438	99	29	2,21	cyclictest	2898	-21	ssh	23:27:48	2
25438	99	29	1,21	cyclictest	0	-21	swapper/2	21:05:14	2
25447	99	28	4,16	cyclictest	0	-21	swapper/3	21:30:13	3
25447	99	28	1,17	cyclictest	359	66	irq/58-eth0	22:15:13	3
25447	99	28	1,17	cyclictest	359	66	irq/58-eth0	00:30:14	3
25425	99	28	7,9	cyclictest	1128	-21	ssh	00:23:58	0
25425	99	28	1,19	cyclictest	23282	-21	ssh	23:40:17	0
25447	99	27	4,13	cyclictest	359	66	irq/58-eth0	22:10:12	3
25447	99	27	13,11	cyclictest	0	-21	swapper/3	23:00:14	3
25438	99	27	4,15	cyclictest	273	46	irq/40-dwc2_hso	20:55:12	2
25438	99	27	2,15	cyclictest	273	46	irq/40-dwc2_hso	20:00:13	2
25433	99	27	3,18	cyclictest	2512	-21	ssh	00:25:16	1
25425	99	27	4,9	cyclictest	11263	-21	diskmemload	22:15:22	0
25425	99	27	3,8	cyclictest	316	-21	ssh	22:32:18	0
25425	99	27	21,3	cyclictest	8825	-21	apt-get	23:50:16	0
25425	99	27	18,3	cyclictest	11370	-21	apt-get	00:30:13	0
25425	99	27	14,8	cyclictest	22924	-21	ssh	22:10:12	0
25447	99	26	3,16	cyclictest	0	-21	swapper/3	23:27:47	3
25447	99	26	2,19	cyclictest	359	66	irq/58-eth0	21:35:12	3
25447	99	26	2,17	cyclictest	0	-21	swapper/3	22:56:47	3
25438	99	26	3,7	cyclictest	0	-21	swapper/2	23:17:53	2
25438	99	26	2,9	cyclictest	0	-21	swapper/2	20:25:13	2
25438	99	26	2,15	cyclictest	273	46	irq/40-dwc2_hso	19:35:11	2
25438	99	26	1,9	cyclictest	20660	-21	ssh	21:15:14	2
25438	99	26	0,6	cyclictest	11263	-21	diskmemload	22:55:02	2
25425	99	26	9,12	cyclictest	18040	-21	sed	22:25:17	0
25425	99	26	8,9	cyclictest	0	-21	swapper/0	20:30:13	0
25425	99	26	8,8	cyclictest	0	-21	swapper/0	23:45:13	0
25425	99	26	5,17	cyclictest	12	-21	ksoftirqd/0	20:45:13	0
25425	99	26	5,10	cyclictest	7233	-21	irqrtprio	21:05:19	0
25425	99	26	4,9	cyclictest	4553	-21	ssh	00:25:24	0
25425	99	26	4,7	cyclictest	0	-21	swapper/0	23:16:06	0
25425	99	26	3,16	cyclictest	0	-21	swapper/0	19:10:12	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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