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 May 28, 2026 00:45:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
24453	99	59	11,10	cyclictest	13	1	rcu_preempt	20:25:11	1
24445	99	57	1,3	cyclictest	0	-21	swapper/0	21:30:11	0
24453	99	55	2,8	cyclictest	13	1	rcu_preempt	23:00:11	1
24453	99	52	1,38	cyclictest	5653	-21	rm	23:50:12	1
24445	99	52	1,6	cyclictest	0	-21	swapper/0	20:55:12	0
24445	99	52	1,45	cyclictest	0	-21	swapper/0	21:15:13	0
24462	99	49	1,40	cyclictest	0	-21	swapper/2	23:45:13	2
24445	99	49	1,3	cyclictest	0	-21	swapper/0	23:30:13	0
24445	99	49	1,3	cyclictest	0	-21	swapper/0	23:30:12	0
24445	99	48	2,7	cyclictest	0	-21	swapper/0	20:35:13	0
24445	99	48	2,2	cyclictest	2835	-21	ssh	22:00:12	0
24445	99	47	1,38	cyclictest	0	-21	swapper/0	21:10:13	0
24470	99	46	3,27	cyclictest	359	66	irq/58-eth0	23:45:13	3
24470	99	46	3,24	cyclictest	359	66	irq/58-eth0	20:25:11	3
24462	99	46	1,25	cyclictest	20101	-21	ssh	23:40:13	2
24470	99	44	1,26	cyclictest	359	66	irq/58-eth0	22:30:12	3
24445	99	44	1,3	cyclictest	0	-21	swapper/0	22:25:12	0
24445	99	44	1,3	cyclictest	0	-21	swapper/0	00:30:12	0
24445	99	42	1,3	cyclictest	0	-21	swapper/0	19:50:11	0
24445	99	42	1,2	cyclictest	23531	-21	apt-get	20:50:13	0
24462	99	41	15,7	cyclictest	13	1	rcu_preempt	20:35:13	2
24445	99	41	2,2	cyclictest	31885	-21	apt-get	20:25:12	0
24445	99	40	2,4	cyclictest	5628	-21	apt-get	23:50:13	0
24445	99	40	1,2	cyclictest	0	-21	swapper/0	23:10:12	0
24470	99	39	2,23	cyclictest	359	66	irq/58-eth0	23:15:13	3
24445	99	39	1,2	cyclictest	0	-21	swapper/0	00:20:13	0
24445	99	39	1,27	cyclictest	26252	-21	ssh	21:55:13	0
24462	99	38	7,20	cyclictest	27527	-21	ssh	22:50:13	2
24445	99	38	8,26	cyclictest	0	-21	swapper/0	22:35:12	0
24445	99	38	3,31	cyclictest	0	-21	swapper/0	22:30:12	0
24445	99	38	1,16	cyclictest	17449	-21	apt-get	20:10:11	0
24462	99	37	1,26	cyclictest	0	-21	swapper/2	23:20:12	2
24453	99	37	4,28	cyclictest	27344	-21	ssh	00:20:12	1
24445	99	37	2,31	cyclictest	11827	-21	ssh	22:05:13	0
24470	99	36	5,21	cyclictest	359	66	irq/58-eth0	19:50:11	3
24470	99	36	1,23	cyclictest	359	66	irq/58-eth0	21:45:13	3
24462	99	36	2,18	cyclictest	22491	-21	ssh	22:28:35	2
24445	99	36	3,2	cyclictest	1788	-21	apt-get	19:20:12	0
24445	99	36	2,5	cyclictest	0	-21	swapper/0	20:15:13	0
24445	99	36	1,5	cyclictest	0	-21	swapper/0	22:20:13	0
24445	99	36	1,3	cyclictest	0	-21	swapper/0	22:45:12	0
24445	99	36	0,4	cyclictest	29667	-21	apt	22:15:12	0
24445	99	36	0,2	cyclictest	20958	-21	apt-get	19:40:13	0
24462	99	35	5,13	cyclictest	26	1	rcuc/2	23:05:11	2
24445	99	35	2,7	cyclictest	0	-21	swapper/0	19:55:11	0
24445	99	35	2,3	cyclictest	0	-21	swapper/0	20:45:10	0
24445	99	35	2,2	cyclictest	29379	-21	apt-get	19:15:14	0
24445	99	35	1,3	cyclictest	0	-21	swapper/0	19:25:11	0
24445	99	35	1,3	cyclictest	0	-21	swapper/0	19:10:12	0
24445	99	35	1,30	cyclictest	14775	-21	ntpq	23:35:26	0
24445	99	35	1,2	cyclictest	0	-21	swapper/0	20:40:12	0
24445	99	35	0,5	cyclictest	31872	-21	apt-get	21:40:10	0
24462	99	34	5,16	cyclictest	273	46	irq/40-dwc2_hso	19:15:13	2
24445	99	34	2,9	cyclictest	13126	-21	df	23:00:14	0
24445	99	34	1,3	cyclictest	0	-21	swapper/0	22:50:12	0
24445	99	34	1,11	cyclictest	28635	-21	fschecks_time	21:20:14	0
24462	99	33	4,20	cyclictest	27	-21	ksoftirqd/2	19:20:11	2
24453	99	33	2,23	cyclictest	4062	-21	ssh	00:25:14	1
24445	99	33	4,26	cyclictest	1665	-21	cut	21:00:21	0
24445	99	33	2,2	cyclictest	0	-21	swapper/0	21:45:13	0
24445	99	33	1,9	cyclictest	18010	-21	grep	21:50:17	0
24445	99	33	1,9	cyclictest	11329	-21	ntp_states	20:00:26	0
24445	99	33	1,8	cyclictest	29700	-21	sed	23:45:17	0
24445	99	33	1,8	cyclictest	22102	-21	awk	23:05:13	0
24445	99	33	1,8	cyclictest	15958	-21	/usr/sbin/munin	20:05:23	0
24445	99	33	1,7	cyclictest	20340	-21	fschecks_time	23:40:16	0
24445	99	33	1,2	cyclictest	0	-21	swapper/0	23:25:12	0
24445	99	33	1,11	cyclictest	7741	-21	ntp_states	22:55:26	0
24445	99	33	1,10	cyclictest	14781	-21	ntpq	19:30:26	0
24445	99	33	0,9	cyclictest	25920	-21	ssh	22:10:55	0
24445	99	33	0,3	cyclictest	4953	-21	apt-get	21:25:11	0
24453	99	32	7,4	cyclictest	21	-21	ksoftirqd/1	20:05:13	1
24453	99	32	0,22	cyclictest	20711	-21	ssh	22:10:11	1
24445	99	32	5,24	cyclictest	17248	-21	cut	19:35:19	0
24445	99	32	1,8	cyclictest	23484	-21	cut	21:35:20	0
24445	99	32	1,8	cyclictest	19453	-21	tr	23:20:19	0
24445	99	32	1,8	cyclictest	13421	-21	cut	22:40:28	0
24445	99	32	1,5	cyclictest	5627	-21	diskstats	21:05:15	0
24445	99	32	1,3	cyclictest	18410	-21	df_inode	00:15:15	0
24445	99	32	1,3	cyclictest	0	-21	swapper/0	00:25:13	0
24445	99	32	1,10	cyclictest	24393	-21	ssh	00:00:19	0
24445	99	32	1,10	cyclictest	12459	-21	users	23:15:32	0
24445	99	32	0,6	cyclictest	5002	-21	ps	20:30:20	0
24445	99	32	0,6	cyclictest	5002	-21	ps	20:30:19	0
24445	99	32	0,2	cyclictest	9299	-21	ssh	00:10:12	0
24470	99	31	1,17	cyclictest	359	66	irq/58-eth0	22:05:12	3
24470	99	31	1,16	cyclictest	359	66	irq/58-eth0	22:35:12	3
24453	99	31	5,7	cyclictest	13	1	rcu_preempt	23:55:14	1
24453	99	31	3,23	cyclictest	21999	-21	ssh	23:05:12	1
24445	99	31	1,4	cyclictest	22154	-21	df_inode	00:35:16	0
24445	99	31	1,2	cyclictest	0	-21	swapper/0	00:05:14	0
24445	99	31	0,2	cyclictest	14632	-21	apt-get	23:55:13	0
24470	99	30	12,10	cyclictest	359	66	irq/58-eth0	23:30:13	3
24470	99	30	12,10	cyclictest	359	66	irq/58-eth0	23:30:12	3
24470	99	30	10,14	cyclictest	359	66	irq/58-eth0	22:10:12	3
24462	99	30	2,20	cyclictest	273	46	irq/40-dwc2_hso	23:00:13	2
24462	99	30	2,17	cyclictest	4969	-21	ssh	21:25:10	2
24462	99	30	2,13	cyclictest	17518	-21	ssh	00:14:33	2
24453	99	30	2,20	cyclictest	10064	-21	diskmemload	23:35:14	1
24453	99	30	1,24	cyclictest	0	-21	swapper/1	23:45:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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