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 Sat Feb 21, 2026 00:45:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
32280	99	64	4,48	cyclictest	15509	-21	ssh	22:20:13	1
32295	99	62	0,43	cyclictest	22289	-21	ssh	00:30:15	2
32295	99	62	0,43	cyclictest	22289	-21	ssh	00:30:14	2
32269	99	62	4,45	cyclictest	11816	-21	ssh	22:00:12	0
32269	99	57	3,11	cyclictest	13	1	rcu_preempt	00:00:12	0
32269	99	55	3,43	cyclictest	983	-21	ssh	22:30:12	0
32269	99	55	3,42	cyclictest	8165	-21	ssh	23:10:12	0
32269	99	55	2,44	cyclictest	22435	-21	ssh	21:30:12	0
32295	99	54	4,44	cyclictest	14607	-21	apt-get	19:25:13	2
32295	99	53	1,46	cyclictest	13799	-21	apt-get	21:05:11	2
32269	99	53	2,6	cyclictest	13	1	rcu_preempt	00:05:12	0
32280	99	52	1,9	cyclictest	19024	-21	ssh	22:40:13	1
32269	99	52	31,18	cyclictest	12	-21	ksoftirqd/0	23:55:12	0
32295	99	51	2,41	cyclictest	27956	-21	apt-get	22:45:12	2
32295	99	51	0,45	cyclictest	4143	-21	apt-get	20:55:13	2
32295	99	48	1,40	cyclictest	15363	-21	apt-get	23:50:12	2
32295	99	47	1,40	cyclictest	31757	-21	apt-get	20:50:13	2
32295	99	47	0,42	cyclictest	0	-21	swapper/2	22:00:12	2
32280	99	47	4,34	cyclictest	1002	-21	ssh	00:00:12	1
32295	99	46	1,38	cyclictest	0	-21	swapper/2	23:05:13	2
32295	99	46	1,34	cyclictest	17298	-21	apt-get	20:35:11	2
32295	99	46	0,33	cyclictest	0	-21	swapper/2	00:20:13	2
32295	99	46	0,33	cyclictest	0	-21	swapper/2	00:20:12	2
32280	99	46	3,32	cyclictest	13401	-21	ssh	00:25:12	1
32280	99	46	3,32	cyclictest	13401	-21	ssh	00:25:11	1
32269	99	46	4,35	cyclictest	31527	-21	ssh	21:35:13	0
32295	99	45	0,35	cyclictest	0	-21	swapper/2	21:50:13	2
32280	99	45	3,33	cyclictest	31539	-21	ssh	23:05:13	1
32280	99	45	2,9	cyclictest	26143	-21	apt-get	23:20:12	1
32280	99	45	2,6	cyclictest	0	-21	swapper/1	19:35:13	1
32269	99	45	1,36	cyclictest	27774	-21	ssh	21:15:13	0
32269	99	45	1,31	cyclictest	6437	-21	ssh	23:45:12	0
32295	99	44	1,38	cyclictest	18997	-21	apt-get	22:40:13	2
32295	99	44	1,37	cyclictest	29828	-21	apt-get	23:40:12	2
32280	99	44	4,4	cyclictest	0	-21	swapper/1	23:15:11	1
32269	99	44	2,35	cyclictest	26158	-21	sh	21:50:13	0
32295	99	43	1,37	cyclictest	27940	-21	apt-get	00:15:11	2
32280	99	43	4,32	cyclictest	4468	-21	ssh	21:20:13	1
32269	99	43	2,26	cyclictest	22496	-21	ssh	23:00:12	0
32269	99	43	2,26	cyclictest	22496	-21	ssh	23:00:12	0
32269	99	43	1,34	cyclictest	20852	-21	rm	22:05:12	0
32295	99	42	1,37	cyclictest	0	-21	swapper/2	21:20:12	2
32295	99	42	1,36	cyclictest	9818	-21	apt-get	19:20:12	2
32295	99	42	0,24	cyclictest	18405	-21	diskmemload	22:27:40	2
32269	99	42	2,32	cyclictest	15380	-21	ssh	23:50:13	0
32295	99	41	2,9	cyclictest	24359	66	ssh	23:55:12	2
32295	99	41	1,36	cyclictest	29870	-21	apt-get	22:10:12	2
32295	99	41	0,37	cyclictest	2815	-21	apt-get	23:25:13	2
32295	99	40	2,31	cyclictest	0	-21	swapper/2	21:10:12	2
32295	99	40	0,37	cyclictest	0	-21	swapper/2	22:05:12	2
32295	99	40	0,29	cyclictest	0	-21	swapper/2	23:20:11	2
32295	99	39	1,33	cyclictest	0	-21	swapper/2	23:35:12	2
32295	99	39	1,25	cyclictest	29101	-21	apt-get	19:40:12	2
32295	99	39	0,35	cyclictest	0	-21	swapper/2	00:05:12	2
32295	99	38	1,33	cyclictest	0	-21	swapper/2	23:30:13	2
32280	99	38	2,30	cyclictest	20820	-21	ssh	23:35:12	1
32280	99	38	1,3	cyclictest	6427	-21	ssh	23:45:12	1
32269	99	38	7,24	cyclictest	12	-21	ksoftirqd/0	20:15:13	0
32319	99	37	12,13	cyclictest	283	66	irq/58-eth0	23:15:13	3
32295	99	37	2,31	cyclictest	11139	-21	apt-get	19:55:12	2
32295	99	37	0,31	cyclictest	18405	-21	diskmemload	22:35:11	2
32319	99	36	4,17	cyclictest	283	66	irq/58-eth0	23:10:12	3
32319	99	36	19,11	cyclictest	283	66	irq/58-eth0	00:00:14	3
32295	99	36	1,12	cyclictest	3503	-21	ssh	22:30:20	2
32295	99	36	0,26	cyclictest	13398	-21	apt-get	21:25:11	2
32280	99	36	1,4	cyclictest	11811	-21	ssh	23:30:12	1
32280	99	36	1,10	cyclictest	3503	-21	sed	19:10:23	1
32280	99	36	1,10	cyclictest	32257	-21	cyclictest	19:10:01	1
32280	99	36	0,11	cyclictest	2539	-21	awk	00:35:27	1
32319	99	35	2,18	cyclictest	283	66	irq/58-eth0	22:25:13	3
32295	99	35	1,25	cyclictest	0	-21	swapper/2	20:25:12	2
32295	99	35	0,31	cyclictest	0	-21	swapper/2	22:15:10	2
32280	99	35	1,9	cyclictest	7995	-21	grep	20:55:28	1
32280	99	35	1,10	cyclictest	25219	-21	kthreadcore	20:40:22	1
32319	99	34	18,10	cyclictest	283	66	irq/58-eth0	23:30:12	3
32295	99	34	3,26	cyclictest	30399	-21	apt-get	20:15:11	2
32295	99	34	1,29	cyclictest	11818	-21	ntp_states	21:40:27	2
32295	99	34	1,25	cyclictest	22477	-21	apt-get	23:00:12	2
32295	99	34	1,25	cyclictest	22477	-21	apt-get	23:00:11	2
32295	99	34	1,24	cyclictest	2993	-21	tune2fs	21:55:15	2
32295	99	34	1,24	cyclictest	28995	-21	cat	21:15:20	2
32295	99	34	0,32	cyclictest	20409	-21	ssh	22:20:34	2
32295	99	34	0,31	cyclictest	18405	-21	diskmemload	00:26:15	2
32295	99	34	0,31	cyclictest	18405	-21	diskmemload	00:26:14	2
32295	99	34	0,31	cyclictest	0	-21	swapper/2	19:45:11	2
32295	99	34	0,29	cyclictest	8997	-21	apt-get	21:00:13	2
32295	99	34	0,29	cyclictest	6327	-21	apt-get	19:50:11	2
32280	99	34	2,9	cyclictest	23060	-21	cat	19:30:27	1
32280	99	34	1,9	cyclictest	6173	-21	kthreadcore	19:15:19	1
32280	99	34	1,9	cyclictest	21208	-21	grep	21:45:27	1
32280	99	34	1,9	cyclictest	18032	-21	kthreadcore	20:00:19	1
32280	99	34	1,9	cyclictest	15992	-21	tr	22:55:21	1
32280	99	34	1,9	cyclictest	1556	-21	sendmail_mailqu	20:15:25	1
32280	99	34	1,9	cyclictest	10289	-21	grep	22:15:24	1
32280	99	34	1,8	cyclictest	5934	-21	cut	20:20:21	1
32280	99	34	1,8	cyclictest	19422	-21	timerwakeupswit	23:50:29	1
32280	99	34	1,7	cyclictest	5343	-21	grep	19:45:28	1
32280	99	34	1,7	cyclictest	3499	-21	kthreadcore	21:55:19	1
32280	99	34	1,7	cyclictest	24207	-21	ntp_192.168.114	20:05:24	1
32280	99	34	1,11	cyclictest	11919	-21	df	22:00:14	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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