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 Wed Aug 26, 2026 00:45:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
17808	99	71	3,51	cyclictest	5554	-21	ssh	22:05:15	0
17833	99	66	43,16	cyclictest	359	66	irq/58-eth0	23:55:13	3
17808	99	66	14,9	cyclictest	13	1	rcu_preempt	19:30:15	0
17808	99	62	10,7	cyclictest	13050	-21	ssh	21:15:14	0
17808	99	59	15,8	cyclictest	13	1	rcu_preempt	23:50:14	0
17808	99	50	3,7	cyclictest	13	1	rcu_preempt	19:45:13	0
17808	99	50	3,37	cyclictest	20550	-21	ssh	00:20:13	0
17808	99	49	2,34	cyclictest	16503	-21	ssh	21:35:13	0
17808	99	49	2,34	cyclictest	16503	-21	ssh	21:35:13	0
17808	99	48	0,8	cyclictest	13	1	rcu_preempt	00:30:14	0
17833	99	47	23,17	cyclictest	359	66	irq/58-eth0	21:10:13	3
17825	99	47	28,13	cyclictest	6139	-21	apt-get	00:30:14	2
17816	99	47	1,41	cyclictest	15744	-21	ssh	23:05:11	1
17825	99	46	27,15	cyclictest	31010	-21	apt-get	21:25:13	2
17825	99	46	1,32	cyclictest	26782	-21	ssh	22:35:12	2
17833	99	45	2,30	cyclictest	359	66	irq/58-eth0	22:40:12	3
17833	99	44	3,29	cyclictest	359	66	irq/58-eth0	21:20:13	3
17825	99	44	32,8	cyclictest	28194	-21	apt-get	23:30:15	2
17808	99	44	3,31	cyclictest	22048	-21	ssh	21:20:14	0
17825	99	43	2,30	cyclictest	930	-21	snmpd	22:50:14	2
17808	99	43	24,9	cyclictest	13	1	rcu_preempt	20:55:13	0
17825	99	42	7,17	cyclictest	0	-21	swapper/2	23:00:14	2
17833	99	41	4,24	cyclictest	359	66	irq/58-eth0	23:50:13	3
17833	99	41	2,27	cyclictest	359	66	irq/58-eth0	22:00:14	3
17816	99	41	2,30	cyclictest	3287	-21	ssh	22:40:12	1
17808	99	41	3,22	cyclictest	4034	-21	ssh	21:10:15	0
17816	99	40	3,30	cyclictest	2033	-21	ssh	21:45:12	1
17808	99	40	1,28	cyclictest	25516	-21	ssh	21:40:13	0
17808	99	40	1,28	cyclictest	25516	-21	ssh	21:40:13	0
17825	99	39	9,24	cyclictest	0	-21	swapper/2	20:20:12	2
17825	99	39	8,15	cyclictest	6543	-21	cat	00:10:28	2
17825	99	39	22,12	cyclictest	14492	-21	ssh	22:10:14	2
17833	99	38	2,24	cyclictest	359	66	irq/58-eth0	21:50:13	3
17825	99	38	9,19	cyclictest	19639	-21	ssh	22:48:28	2
17825	99	38	7,13	cyclictest	13515	-21	cut	21:15:19	2
17825	99	38	22,11	cyclictest	31457	-21	ssh	23:50:13	2
17825	99	38	11,20	cyclictest	0	-21	swapper/2	21:50:14	2
17825	99	38	10,12	cyclictest	9157	-21	sort	22:25:18	2
17808	99	38	3,32	cyclictest	13647	-21	ssh	23:40:13	0
17833	99	37	5,21	cyclictest	359	66	irq/58-eth0	21:35:13	3
17833	99	37	5,21	cyclictest	359	66	irq/58-eth0	21:35:13	3
17825	99	37	9,18	cyclictest	22133	-21	if_eth0	20:55:21	2
17825	99	37	7,12	cyclictest	930	-21	snmpd	23:15:19	2
17825	99	37	7,12	cyclictest	930	-21	snmpd	23:15:18	2
17825	99	37	23,10	cyclictest	30355	-21	apt-get	22:55:13	2
17825	99	37	22,9	cyclictest	16943	-21	apt-get	00:00:14	2
17816	99	37	1,30	cyclictest	1328	-21	ssh	23:15:12	1
17816	99	37	1,30	cyclictest	1328	-21	ssh	23:15:12	1
17833	99	36	3,17	cyclictest	359	66	irq/58-eth0	00:00:13	3
17825	99	36	7,15	cyclictest	13206	-21	cat	00:15:22	2
17825	99	36	17,15	cyclictest	20011	-21	apt-get	21:55:13	2
17825	99	36	10,14	cyclictest	28277	-21	grep	21:00:19	2
17816	99	36	2,21	cyclictest	21	-21	ksoftirqd/1	19:25:13	1
17808	99	36	4,21	cyclictest	12	-21	ksoftirqd/0	23:55:13	0
17808	99	36	1,28	cyclictest	30387	-21	rm	22:55:14	0
17833	99	35	2,22	cyclictest	359	66	irq/58-eth0	00:25:13	3
17825	99	35	6,11	cyclictest	0	-21	swapper/2	19:15:24	2
17825	99	35	25,6	cyclictest	25971	-21	ssh	00:05:14	2
17808	99	35	2,25	cyclictest	17880	-21	ssh	22:30:13	0
17808	99	35	18,11	cyclictest	13	1	rcu_preempt	20:35:14	0
17825	99	34	9,17	cyclictest	15411	-21	usage_EthcTask	20:10:31	2
17825	99	34	6,13	cyclictest	7238	-21	latency_hist	20:40:01	2
17816	99	34	1,4	cyclictest	0	-21	swapper/1	23:10:11	1
17808	99	34	5,22	cyclictest	12	-21	ksoftirqd/0	23:00:13	0
17808	99	34	1,25	cyclictest	11073	-21	sh	21:50:13	0
17825	99	33	7,9	cyclictest	16422	-21	ssh	21:35:09	2
17825	99	33	7,9	cyclictest	16422	-21	ssh	21:35:09	2
17825	99	33	7,13	cyclictest	31334	-21	cat	19:20:26	2
17825	99	33	6,11	cyclictest	30236	-21	ssh	22:17:56	2
17825	99	33	5,18	cyclictest	749	-21	ssh	22:00:31	2
17825	99	33	5,18	cyclictest	3621	-21	diskmemload	22:06:37	2
17825	99	33	4,17	cyclictest	0	-21	swapper/2	23:47:57	2
17816	99	33	13,8	cyclictest	0	-21	swapper/1	19:15:14	1
17825	99	32	8,14	cyclictest	12008	-21	rm	21:14:15	2
17825	99	32	6,9	cyclictest	20246	-21	kthreadcore	19:10:20	2
17825	99	32	6,18	cyclictest	0	-21	swapper/2	21:45:12	2
17825	99	32	6,12	cyclictest	30534	-21	irqcore	20:30:18	2
17825	99	32	6,10	cyclictest	23572	-21	cat	23:25:30	2
17825	99	32	5,11	cyclictest	3621	-21	diskmemload	23:58:37	2
17825	99	32	4,18	cyclictest	25502	-21	ssh	21:40:14	2
17825	99	32	4,18	cyclictest	25502	-21	ssh	21:40:13	2
17825	99	32	2,14	cyclictest	13259	-21	latency_hist	23:40:01	2
17808	99	32	15,11	cyclictest	12	-21	ksoftirqd/0	23:25:12	0
17825	99	31	6,17	cyclictest	3621	-21	diskmemload	22:41:00	2
17825	99	31	6,11	cyclictest	31126	-21	ssh	23:12:21	2
17825	99	31	5,13	cyclictest	31548	-21	df	21:05:23	2
17825	99	31	5,10	cyclictest	0	-21	swapper/2	23:06:18	2
17825	99	31	14,13	cyclictest	0	-21	swapper/2	20:25:12	2
17825	99	31	1,15	cyclictest	0	-21	swapper/2	21:30:15	2
17808	99	31	1,23	cyclictest	29577	-21	ssh	00:25:15	0
17825	99	30	8,10	cyclictest	5767	-21	ssh	22:21:41	2
17825	99	30	6,13	cyclictest	22385	-21	if_eth0	21:20:18	2
17825	99	30	5,16	cyclictest	0	-21	swapper/2	22:34:34	2
17825	99	30	4,7	cyclictest	0	-21	swapper/2	00:26:42	2
17808	99	30	9,18	cyclictest	12	-21	ksoftirqd/0	21:00:13	0
17808	99	30	1,21	cyclictest	11536	-21	ssh	00:15:15	0
17825	99	29	8,11	cyclictest	5993	-21	sed	20:05:02	2
17825	99	29	6,14	cyclictest	15670	-21	/usr/sbin/munin	20:15:25	2
17825	99	29	4,7	cyclictest	3621	-21	diskmemload	23:20:03	2
17825	99	29	3,12	cyclictest	3621	-21	diskmemload	23:43:06	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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