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 Sun May 24, 2026 00:45:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
22731	99	76	1,58	cyclictest	24791	-21	ssh	22:30:13	0
22762	99	68	39,18	cyclictest	359	66	irq/58-eth0	23:05:12	3
22750	99	62	4,38	cyclictest	11755	-21	ssh	22:05:13	2
22750	99	59	14,20	cyclictest	27	-21	ksoftirqd/2	22:40:13	2
22750	99	59	14,20	cyclictest	27	-21	ksoftirqd/2	22:40:13	2
22731	99	55	34,12	cyclictest	12	-21	ksoftirqd/0	21:20:12	0
22762	99	53	13,27	cyclictest	359	66	irq/58-eth0	22:10:13	3
22731	99	52	3,36	cyclictest	20818	-21	sh	22:10:12	0
22762	99	51	5,29	cyclictest	359	66	irq/58-eth0	23:20:13	3
22731	99	51	7,5	cyclictest	13	1	rcu_preempt	21:05:14	0
22750	99	50	4,16	cyclictest	273	46	irq/40-dwc2_hso	00:15:15	2
22731	99	46	0,36	cyclictest	17079	-21	ssh	23:55:14	0
22731	99	46	0,36	cyclictest	17079	-21	ssh	23:55:14	0
22731	99	45	1,31	cyclictest	29891	-21	ssh	22:15:13	0
22762	99	43	4,25	cyclictest	359	66	irq/58-eth0	21:30:12	3
22750	99	43	1,20	cyclictest	30495	-21	cut	22:15:19	2
22750	99	42	1,16	cyclictest	11635	-21	latency_hist	00:10:02	2
22731	99	42	0,33	cyclictest	10606	-21	ssh	22:40:12	0
22731	99	42	0,33	cyclictest	10606	-21	ssh	22:40:11	0
22750	99	41	3,24	cyclictest	930	-21	snmpd	22:45:15	2
22750	99	41	1,15	cyclictest	14152	-21	ps	20:40:20	2
22762	99	40	5,23	cyclictest	359	66	irq/58-eth0	20:10:12	3
22750	99	40	5,25	cyclictest	9341	-21	ssh	23:15:15	2
22731	99	40	2,35	cyclictest	28776	-21	ssh	22:50:12	0
22750	99	39	1,14	cyclictest	27627	-21	grep	19:45:23	2
22762	99	38	2,22	cyclictest	359	66	irq/58-eth0	20:25:11	3
22750	99	38	3,15	cyclictest	8857	-21	unixbench_singl	19:25:29	2
22750	99	38	3,15	cyclictest	8857	-21	unixbench_singl	19:25:28	2
22750	99	38	2,10	cyclictest	27450	-21	latency_hist	19:15:01	2
22750	99	38	1,10	cyclictest	14408	-21	kthreadcore	21:30:18	2
22731	99	38	22,7	cyclictest	0	-21	swapper/0	22:20:14	0
22731	99	38	1,29	cyclictest	26011	-21	ssh	21:55:12	0
22762	99	37	4,20	cyclictest	359	66	irq/58-eth0	20:45:12	3
22762	99	37	2,10	cyclictest	0	-21	swapper/3	19:25:14	3
22762	99	37	2,10	cyclictest	0	-21	swapper/3	19:25:13	3
22762	99	37	14,16	cyclictest	359	66	irq/58-eth0	22:55:13	3
22750	99	37	1,9	cyclictest	17223	-21	fschecks_count	23:55:16	2
22750	99	37	1,9	cyclictest	17223	-21	fschecks_count	23:55:16	2
22731	99	37	3,24	cyclictest	8482	-21	diskmemload	22:35:13	0
22762	99	36	7,17	cyclictest	359	66	irq/58-eth0	19:45:14	3
22750	99	36	7,6	cyclictest	0	-21	swapper/2	00:31:07	2
22750	99	36	1,9	cyclictest	29216	-21	kthreadcore	00:00:22	2
22750	99	36	1,16	cyclictest	25109	-21	fschecks_count	00:35:17	2
22750	99	36	1,16	cyclictest	22561	-21	kthreadcore	22:10:20	2
22731	99	36	0,31	cyclictest	27490	-21	ssh	23:25:12	0
22762	99	35	2,19	cyclictest	359	66	irq/58-eth0	23:40:13	3
22750	99	35	1,8	cyclictest	27122	-21	/usr/sbin/munin	23:05:23	2
22750	99	35	1,22	cyclictest	18120	-21	ssh	21:15:15	2
22750	99	35	1,15	cyclictest	30117	-21	cpu	00:20:15	2
22750	99	35	1,15	cyclictest	17458	-21	irqcore	21:50:18	2
22750	99	35	1,14	cyclictest	14403	-21	kthreadcore	23:35:20	2
22742	99	35	2,26	cyclictest	2840	-21	ssh	00:05:14	1
22731	99	35	3,18	cyclictest	12	-21	ksoftirqd/0	23:40:14	0
22762	99	34	2,23	cyclictest	359	66	irq/58-eth0	22:20:14	3
22750	99	34	1,8	cyclictest	26130	-21	sh	23:40:29	2
22750	99	34	1,16	cyclictest	14202	-21	kthreadcore	20:05:22	2
22750	99	34	1,15	cyclictest	18551	-21	grep	19:35:29	2
22750	99	33	6,17	cyclictest	6792	-21	ssh	00:25:13	2
22750	99	33	1,8	cyclictest	29278	-21	kthreadcore	20:55:20	2
22750	99	33	1,8	cyclictest	28430	-21	kthreadcore	21:20:20	2
22750	99	33	1,8	cyclictest	21912	-21	memory	23:20:22	2
22750	99	33	1,14	cyclictest	20568	-21	latency_hist	20:15:02	2
22742	99	33	3,18	cyclictest	14500	-21	ssh	23:00:13	1
22742	99	33	14,11	cyclictest	13	1	rcu_preempt	00:30:13	1
22762	99	31	1,20	cyclictest	359	66	irq/58-eth0	22:30:13	3
22750	99	31	6,15	cyclictest	273	46	irq/40-dwc2_hso	21:25:14	2
22762	99	30	14,8	cyclictest	0	-21	swapper/3	19:40:14	3
22762	99	30	14,8	cyclictest	0	-21	swapper/3	19:40:14	3
22750	99	30	5,14	cyclictest	273	46	irq/40-dwc2_hso	21:35:13	2
22750	99	30	3,17	cyclictest	273	46	irq/40-dwc2_hso	19:20:13	2
22750	99	30	1,19	cyclictest	5366	-21	ssh	22:55:14	2
22731	99	30	2,4	cyclictest	13	1	rcu_preempt	19:30:13	0
22762	99	29	17,8	cyclictest	0	-21	swapper/3	20:40:12	3
22742	99	29	5,7	cyclictest	13	1	rcu_preempt	00:13:06	1
22742	99	29	1,6	cyclictest	13	1	rcu_preempt	20:10:11	1
22742	99	29	1,25	cyclictest	5377	-21	sh	22:55:13	1
22731	99	29	11,9	cyclictest	26557	-21	kworker/u8:1	23:05:13	0
22762	99	28	2,14	cyclictest	359	66	irq/58-eth0	21:20:13	3
22762	99	28	2,10	cyclictest	0	-21	swapper/3	00:31:07	3
22750	99	28	2,17	cyclictest	31185	-21	ssh	21:40:13	2
22750	99	28	2,15	cyclictest	273	46	irq/40-dwc2_hso	19:15:13	2
22750	99	28	2,11	cyclictest	0	-21	swapper/2	21:10:14	2
22750	99	28	1,16	cyclictest	11976	-21	ssh	00:10:15	2
22750	99	28	1,11	cyclictest	24782	-21	ssh	22:30:12	2
22742	99	28	1,21	cyclictest	24779	-21	apt-get	22:30:13	1
22731	99	28	17,6	cyclictest	0	-21	swapper/0	00:00:14	0
22762	99	27	3,16	cyclictest	359	66	irq/58-eth0	21:25:13	3
22762	99	27	2,14	cyclictest	359	66	irq/58-eth0	21:50:12	3
22762	99	27	1,14	cyclictest	359	66	irq/58-eth0	22:40:12	3
22762	99	27	1,14	cyclictest	359	66	irq/58-eth0	22:40:11	3
22750	99	27	6,11	cyclictest	273	46	irq/40-dwc2_hso	20:30:13	2
22750	99	27	5,14	cyclictest	273	46	irq/40-dwc2_hso	21:45:17	2
22750	99	27	5,12	cyclictest	273	46	irq/40-dwc2_hso	22:25:13	2
22750	99	27	3,14	cyclictest	273	46	irq/40-dwc2_hso	19:30:13	2
22750	99	27	2,18	cyclictest	0	-21	swapper/2	23:10:14	2
22742	99	27	4,18	cyclictest	21	-21	ksoftirqd/1	19:15:13	1
22731	99	27	2,19	cyclictest	24970	-21	ssh	00:35:15	0
22731	99	27	1,17	cyclictest	844	-21	munin-node	20:20:15	0
22750	99	26	5,12	cyclictest	0	-21	swapper/2	23:30:16	2
22742	99	26	8,11	cyclictest	22723	-21	cyclictest	20:55:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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