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 17, 2026 12:45:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
26603	99	65	20,15	cyclictest	31456	-21	ssh	12:20:13	2
26580	99	64	3,10	cyclictest	13	1	rcu_preempt	09:00:14	0
26580	99	59	5,10	cyclictest	13	1	rcu_preempt	07:55:13	0
26603	99	57	3,19	cyclictest	25386	-21	sh	09:35:13	2
26580	99	52	6,7	cyclictest	13	1	rcu_preempt	08:05:13	0
26580	99	52	2,39	cyclictest	12423	-21	ssh	09:10:12	0
26620	99	51	4,26	cyclictest	359	66	irq/58-eth0	11:00:12	3
26603	99	50	38,9	cyclictest	0	-21	swapper/2	07:35:11	2
26620	99	49	2,33	cyclictest	359	66	irq/58-eth0	11:30:14	3
26620	99	48	3,28	cyclictest	359	66	irq/58-eth0	10:50:13	3
26620	99	48	3,28	cyclictest	359	66	irq/58-eth0	10:50:13	3
26580	99	47	3,27	cyclictest	2524	-21	ssh	11:10:15	0
26620	99	46	3,27	cyclictest	359	66	irq/58-eth0	12:15:13	3
26592	99	46	1,39	cyclictest	13537	-21	apt-get	07:30:11	1
26620	99	45	2,24	cyclictest	359	66	irq/58-eth0	09:05:13	3
26592	99	45	1,37	cyclictest	0	-21	swapper/1	11:05:13	1
26592	99	45	0,39	cyclictest	14753	-21	apt-get	08:05:14	1
26620	99	44	7,20	cyclictest	359	66	irq/58-eth0	11:25:14	3
26620	99	44	2,24	cyclictest	359	66	irq/58-eth0	11:35:13	3
26592	99	44	1,38	cyclictest	31448	-21	apt-get	12:20:14	1
26592	99	44	1,34	cyclictest	16458	-21	diskstats	09:30:15	1
26592	99	43	1,39	cyclictest	26561	-21	cyclictest	08:20:14	1
26592	99	43	1,37	cyclictest	17007	-21	apt-get	12:30:12	1
26592	99	42	1,37	cyclictest	0	-21	swapper/1	10:35:12	1
26592	99	42	1,36	cyclictest	9612	-21	ssh	10:20:14	1
26580	99	42	2,37	cyclictest	24236	-21	ssh	11:40:13	0
26603	99	41	2,11	cyclictest	4575	-21	df_inode	12:05:14	2
26603	99	41	2,11	cyclictest	4575	-21	df_inode	12:05:14	2
26592	99	41	2,35	cyclictest	7392	-21	apt-get	09:05:13	1
26592	99	41	2,34	cyclictest	0	-21	swapper/1	09:35:12	1
26592	99	41	1,30	cyclictest	26631	-21	ntp_states	07:40:28	1
26592	99	41	1,25	cyclictest	30661	-21	ssh	10:49:45	1
26592	99	41	0,25	cyclictest	26955	-21	ssh	10:29:43	1
26580	99	41	5,26	cyclictest	12	-21	ksoftirqd/0	08:20:13	0
26620	99	40	2,21	cyclictest	359	66	irq/58-eth0	11:50:13	3
26592	99	40	2,33	cyclictest	2513	-21	apt-get	11:10:15	1
26580	99	40	2,26	cyclictest	20121	-21	ssh	09:50:14	0
26620	99	39	5,25	cyclictest	359	66	irq/58-eth0	12:05:13	3
26620	99	39	5,25	cyclictest	359	66	irq/58-eth0	12:05:13	3
26620	99	39	2,23	cyclictest	359	66	irq/58-eth0	11:10:15	3
26603	99	39	26,11	cyclictest	11945	-21	diskmemload	12:10:13	2
26592	99	39	3,31	cyclictest	12412	-21	apt-get	09:10:13	1
26592	99	39	1,33	cyclictest	8702	-21	apt-get	07:25:13	1
26592	99	39	1,32	cyclictest	22422	-21	ssh	12:15:12	1
26592	99	39	0,33	cyclictest	18321	-21	apt-get	07:35:12	1
26580	99	39	5,10	cyclictest	13	1	rcu_preempt	11:15:14	0
26580	99	39	5,10	cyclictest	13	1	rcu_preempt	11:15:14	0
26580	99	39	1,30	cyclictest	5873	-21	ssh	10:00:14	0
26580	99	39	1,28	cyclictest	29231	-21	ssh	09:55:14	0
26592	99	38	2,32	cyclictest	0	-21	swapper/1	10:00:13	1
26592	99	38	2,31	cyclictest	5163	-21	apt-get	07:55:13	1
26592	99	38	0,34	cyclictest	11053	-21	apt-get	08:35:11	1
26580	99	38	14,18	cyclictest	5804	-1	kworker/u9:2	12:10:14	0
26620	99	37	14,15	cyclictest	359	66	irq/58-eth0	10:55:14	3
26592	99	37	2,31	cyclictest	7276	-21	apt-get	09:25:12	1
26592	99	37	2,28	cyclictest	0	-21	swapper/1	08:45:13	1
26592	99	37	1,22	cyclictest	29426	-21	fschecks_time	09:55:17	1
26592	99	37	1,21	cyclictest	11885	-21	if_eth1	11:15:18	1
26592	99	37	1,21	cyclictest	11885	-21	if_eth1	11:15:18	1
26592	99	37	0,27	cyclictest	11945	-21	diskmemload	10:57:50	1
26592	99	37	0,23	cyclictest	13485	-21	ssh	11:33:27	1
26592	99	36	2,31	cyclictest	813	-21	apt-get	11:45:13	1
26592	99	36	2,31	cyclictest	0	-21	swapper/1	09:40:14	1
26592	99	36	2,31	cyclictest	0	-21	swapper/1	09:40:13	1
26592	99	36	1,31	cyclictest	2337	-21	memory	10:50:22	1
26592	99	36	1,31	cyclictest	2337	-21	memory	10:50:22	1
26592	99	36	1,30	cyclictest	0	-21	swapper/1	10:15:12	1
26592	99	36	1,29	cyclictest	11006	-21	apt-get	09:45:13	1
26592	99	36	1,25	cyclictest	30930	66	ssh	11:42:42	1
26592	99	36	1,22	cyclictest	19307	-21	ntp_states	08:40:24	1
26592	99	36	1,19	cyclictest	21062	-21	sh	11:36:43	1
26620	99	35	3,20	cyclictest	359	66	irq/58-eth0	11:40:13	3
26592	99	35	2,29	cyclictest	0	-21	swapper/1	12:35:12	1
26592	99	35	1,30	cyclictest	6536	-21	if_eth1	08:30:17	1
26592	99	35	1,30	cyclictest	27673	-21	apt-get	10:30:13	1
26592	99	35	1,29	cyclictest	13308	-21	apt-get	10:40:15	1
26592	99	35	0,32	cyclictest	9942	-21	apt-get	08:00:16	1
26592	99	34	18,13	cyclictest	0	-21	swapper/1	11:25:13	1
26592	99	34	1,29	cyclictest	0	-21	swapper/1	10:05:11	1
26592	99	34	1,28	cyclictest	0	-21	swapper/1	12:05:12	1
26592	99	34	1,28	cyclictest	0	-21	swapper/1	12:05:11	1
26592	99	34	1,27	cyclictest	13416	-21	apt-get	12:10:13	1
26592	99	34	0,24	cyclictest	2346	-21	ssh	12:02:56	1
26620	99	33	2,17	cyclictest	359	66	irq/58-eth0	08:05:14	3
26620	99	33	1,16	cyclictest	359	66	irq/58-eth0	11:55:12	3
26592	99	33	1,29	cyclictest	16065	-21	ssh	11:52:12	1
26592	99	33	1,25	cyclictest	0	-21	swapper/1	08:10:14	1
26592	99	33	1,23	cyclictest	11945	-21	diskmemload	09:22:22	1
26592	99	33	0,29	cyclictest	309	-21	apt-get	07:50:13	1
26580	99	33	16,12	cyclictest	12	-21	ksoftirqd/0	08:25:13	0
26603	99	32	9,12	cyclictest	27	-21	ksoftirqd/2	11:50:10	2
26592	99	32	16,13	cyclictest	0	-21	swapper/1	08:50:12	1
26592	99	32	1,28	cyclictest	3105	-21	irqrtprio	09:00:20	1
26592	99	32	1,27	cyclictest	26875	-21	grep	07:10:17	1
26580	99	32	22,6	cyclictest	12	-21	ksoftirqd/0	12:05:13	0
26580	99	32	22,6	cyclictest	12	-21	ksoftirqd/0	12:05:13	0
26580	99	32	20,4	cyclictest	536	-21	usb-storage	09:20:11	0
26603	99	31	8,17	cyclictest	0	-21	swapper/2	11:35:12	2
26603	99	31	3,18	cyclictest	273	46	irq/40-dwc2_hso	08:05:13	2
26592	99	31	16,9	cyclictest	26561	-21	cyclictest	12:25:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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