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 Tue Aug 04, 2026 00:45:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
29133	99	64	23,9	cyclictest	12	-21	ksoftirqd/0	00:30:13	0
29152	99	61	14,6	cyclictest	13	1	rcu_preempt	22:35:12	2
29133	99	50	35,6	cyclictest	14756	-21	diskmemload	21:20:13	0
29133	99	47	2,39	cyclictest	15740	-21	ssh	22:40:13	0
29152	99	45	4,21	cyclictest	30145	-21	ssh	22:30:14	2
29152	99	45	18,19	cyclictest	27	-21	ksoftirqd/2	22:15:13	2
29152	99	45	1,24	cyclictest	8470	-21	ssh	23:30:14	2
29133	99	42	0,36	cyclictest	29973	-21	ssh	00:00:12	0
29142	99	41	3,36	cyclictest	15545	-21	ssh	00:10:12	1
29142	99	40	33,3	cyclictest	0	-21	swapper/1	23:45:14	1
29133	99	40	25,7	cyclictest	12	-21	ksoftirqd/0	19:45:27	0
29142	99	39	2,34	cyclictest	28293	-21	ssh	23:05:13	1
29142	99	39	2,33	cyclictest	3021	-21	ssh	22:15:14	1
29133	99	39	2,29	cyclictest	26384	-21	diskmemload	23:40:11	0
29133	99	39	1,29	cyclictest	1001	-21	ssh	00:20:14	0
29152	99	38	10,6	cyclictest	15829	-21	kworker/2:1	19:30:13	2
29142	99	38	1,32	cyclictest	27783	-21	ssh	00:35:12	1
29165	99	37	2,20	cyclictest	359	66	irq/58-eth0	19:55:14	3
29165	99	36	1,22	cyclictest	359	66	irq/58-eth0	22:55:12	3
29152	99	36	17,10	cyclictest	6563	-21	sh	00:05:14	2
29152	99	35	1,8	cyclictest	13	1	rcu_preempt	20:35:12	2
29142	99	35	8,23	cyclictest	17470	-21	ssh	22:05:16	1
29142	99	35	8,23	cyclictest	17470	-21	ssh	22:05:15	1
29142	99	34	3,26	cyclictest	11937	-21	ssh	23:50:14	1
29133	99	34	1,21	cyclictest	22885	-21	ssh	23:20:13	0
29152	99	33	3,23	cyclictest	22906	-21	ssh	23:20:14	2
29152	99	33	3,20	cyclictest	0	-21	swapper/2	23:05:14	2
29152	99	32	15,10	cyclictest	27	-21	ksoftirqd/2	23:50:13	2
29152	99	32	1,19	cyclictest	273	46	irq/40-dwc2_hso	23:15:14	2
29142	99	32	3,23	cyclictest	30130	-21	ssh	22:30:12	1
29142	99	32	1,28	cyclictest	10315	-21	ssh	22:55:13	1
29133	99	32	2,25	cyclictest	17464	-21	ssh	23:35:15	0
29152	99	31	17,7	cyclictest	0	-21	swapper/2	00:10:13	2
29165	99	30	15,9	cyclictest	359	66	irq/58-eth0	23:40:11	3
29165	99	30	0,16	cyclictest	359	66	irq/58-eth0	20:30:13	3
29152	99	30	15,11	cyclictest	27	-21	ksoftirqd/2	21:20:15	2
29152	99	30	1,16	cyclictest	26375	-21	ssh	23:40:12	2
29142	99	30	2,8	cyclictest	13	1	rcu_preempt	20:35:13	1
29142	99	30	2,22	cyclictest	22617	-21	sed	23:20:02	1
29133	99	30	2,21	cyclictest	8038	-21	ssh	22:00:01	0
29165	99	29	12,11	cyclictest	359	66	irq/58-eth0	21:55:01	3
29165	99	29	12,11	cyclictest	359	66	irq/58-eth0	21:55:00	3
29152	99	29	3,8	cyclictest	0	-21	swapper/2	23:57:00	2
29142	99	29	2,16	cyclictest	21	-21	ksoftirqd/1	19:50:12	1
29133	99	29	3,20	cyclictest	24770	-21	ssh	22:45:17	0
29133	99	29	2,21	cyclictest	27514	-21	idleruntime-cro	21:35:00	0
29152	99	28	5,15	cyclictest	0	-21	swapper/2	22:50:16	2
29152	99	28	5,15	cyclictest	0	-21	swapper/2	22:50:15	2
29133	99	28	2,20	cyclictest	4661	-21	ssh	22:33:01	0
29133	99	28	1,19	cyclictest	19108	-21	latency_hist	23:00:01	0
29133	99	28	1,16	cyclictest	4599	-21	ssh	21:40:13	0
29165	99	27	9,12	cyclictest	0	-21	swapper/3	22:19:00	3
29152	99	27	10,7	cyclictest	876	-21	ps	20:55:19	2
29142	99	27	2,19	cyclictest	31285	-21	ssh	21:55:01	1
29142	99	27	2,19	cyclictest	31285	-21	ssh	21:55:01	1
29142	99	27	2,19	cyclictest	27504	-21	apt-get	21:35:01	1
29142	99	27	2,19	cyclictest	27038	-21	rm	23:57:00	1
29142	99	27	2,16	cyclictest	6565	-21	sh	00:05:15	1
29142	99	27	1,21	cyclictest	6728	-21	ssh	22:35:13	1
29142	99	27	11,11	cyclictest	19361	-21	ssh	23:00:14	1
29133	99	27	2,19	cyclictest	2632	-21	latency_hist	22:15:01	0
29133	99	27	2,19	cyclictest	20543	-21	latency_hist	23:55:00	0
29133	99	27	12,5	cyclictest	13	1	rcu_preempt	21:40:01	0
29165	99	26	9,11	cyclictest	0	-21	swapper/3	21:47:19	3
29165	99	26	4,12	cyclictest	360	66	irq/59-eth0	23:45:15	3
29165	99	26	3,17	cyclictest	0	-21	swapper/3	22:33:01	3
29165	99	26	2,17	cyclictest	0	-21	swapper/3	23:33:00	3
29152	99	26	1,21	cyclictest	0	-21	swapper/2	00:30:14	2
29142	99	26	1,19	cyclictest	12357	-21	ssh	21:44:02	1
29133	99	26	2,19	cyclictest	20931	-21	ssh	23:55:14	0
29133	99	26	2,19	cyclictest	14567	-21	sh	23:32:01	0
29133	99	26	2,18	cyclictest	4871	-21	diskmemload	23:10:14	0
29133	99	26	2,18	cyclictest	14756	-21	diskmemload	21:47:20	0
29165	99	25	16,6	cyclictest	359	66	irq/58-eth0	23:05:13	3
29152	99	25	9,9	cyclictest	26	1	rcuc/2	20:00:13	2
29152	99	25	9,9	cyclictest	26	1	rcuc/2	20:00:12	2
29152	99	25	2,18	cyclictest	0	-21	swapper/2	22:03:02	2
29152	99	25	2,16	cyclictest	273	46	irq/40-dwc2_hso	20:10:12	2
29152	99	25	2,16	cyclictest	0	-21	swapper/2	22:05:16	2
29152	99	25	2,16	cyclictest	0	-21	swapper/2	22:05:16	2
29152	99	25	1,21	cyclictest	5297	-21	ls	19:15:30	2
29152	99	25	1,16	cyclictest	0	-21	swapper/2	19:50:12	2
29152	99	25	0,2	cyclictest	13	1	rcu_preempt	21:35:26	2
29142	99	25	10,10	cyclictest	14756	-21	diskmemload	23:32:00	1
29133	99	25	2,19	cyclictest	22179	-21	apt-get	20:10:11	0
29165	99	24	1,9	cyclictest	359	66	irq/58-eth0	20:50:15	3
29165	99	24	13,7	cyclictest	359	66	irq/58-eth0	00:20:14	3
29165	99	24	11,8	cyclictest	359	66	irq/58-eth0	21:55:15	3
29152	99	24	6,4	cyclictest	13	1	rcu_preempt	20:20:14	2
29152	99	24	4,12	cyclictest	6156	-21	munin-plugin-st	00:05:02	2
29152	99	24	18,4	cyclictest	31694	-21	ssh	21:55:15	2
29152	99	24	13,9	cyclictest	18047	-21	irqrtprio	23:35:19	2
29152	99	24	1,20	cyclictest	618	-21	ls	19:10:28	2
29152	99	24	0,19	cyclictest	11943	-21	acpi	22:20:11	2
29142	99	24	2,19	cyclictest	29993	-21	ssh	00:00:15	1
29142	99	24	1,16	cyclictest	11987	-21	ssh	22:20:11	1
29133	99	24	1,15	cyclictest	10001	-21	rm	00:25:13	0
29165	99	23	9,10	cyclictest	359	66	irq/58-eth0	21:20:14	3
29165	99	23	15,5	cyclictest	359	66	irq/58-eth0	23:15:14	3
29152	99	23	8,13	cyclictest	27	-21	ksoftirqd/2	21:45:22	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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