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 Fri Jun 26, 2026 12:45:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
23780	99	64	3,49	cyclictest	17434	-21	ssh	12:30:12	1
23779	99	63	7,9	cyclictest	13	1	rcu_preempt	10:30:11	0
23779	99	61	2,45	cyclictest	7838	-21	ssh	10:20:11	0
23779	99	60	5,45	cyclictest	25005	-21	ssh	11:05:13	0
23780	99	57	2,46	cyclictest	4424	-21	ssh	12:05:13	1
23795	99	56	1,32	cyclictest	2723	-21	ssh	10:35:13	2
23779	99	56	3,11	cyclictest	13	1	rcu_preempt	08:55:13	0
23780	99	55	2,8	cyclictest	13	1	rcu_preempt	09:00:12	1
23780	99	54	3,40	cyclictest	22566	-21	ssh	12:15:15	1
23779	99	54	3,10	cyclictest	13	1	rcu_preempt	08:50:12	0
23795	99	52	1,36	cyclictest	9634	-21	ssh	11:50:12	2
23780	99	51	1,38	cyclictest	27129	-21	ssh	09:55:13	1
23780	99	51	1,38	cyclictest	27129	-21	ssh	09:55:12	1
23795	99	50	2,27	cyclictest	0	-21	swapper/2	09:45:13	2
23780	99	50	1,38	cyclictest	525	-21	ssh	11:45:11	1
23780	99	49	4,36	cyclictest	1667	-21	ssh	11:10:13	1
23795	99	48	19,22	cyclictest	27	-21	ksoftirqd/2	10:30:11	2
23780	99	46	0,33	cyclictest	31083	-21	ssh	10:15:12	1
23795	99	44	6,7	cyclictest	27	-21	ksoftirqd/2	09:25:13	2
23803	99	43	3,22	cyclictest	359	66	irq/58-eth0	09:45:13	3
23803	99	42	30,6	cyclictest	359	66	irq/58-eth0	11:45:13	3
23795	99	42	2,31	cyclictest	22551	-21	ssh	12:15:13	2
23780	99	41	2,32	cyclictest	18680	-21	ssh	11:55:10	1
23803	99	39	3,22	cyclictest	359	66	irq/58-eth0	09:15:12	3
23780	99	39	2,23	cyclictest	14811	-21	ssh	11:35:13	1
23779	99	39	7,24	cyclictest	12	-21	ksoftirqd/0	08:25:13	0
23803	99	38	1,22	cyclictest	359	66	irq/58-eth0	12:00:13	3
23780	99	37	1,29	cyclictest	16940	-21	ssh	10:25:12	1
23803	99	35	10,16	cyclictest	0	-21	swapper/3	10:30:10	3
23779	99	35	3,19	cyclictest	18056	-21	ssh	09:50:13	0
23803	99	33	2,19	cyclictest	359	66	irq/58-eth0	10:00:13	3
23780	99	33	6,19	cyclictest	30099	-21	ssh	10:50:13	1
23779	99	33	1,25	cyclictest	8969	-21	ssh	09:45:14	0
23780	99	32	2,23	cyclictest	32316	-21	ssh	09:40:13	1
23779	99	32	5,22	cyclictest	11937	-21	ssh	10:40:12	0
23779	99	32	4,20	cyclictest	12	-21	ksoftirqd/0	08:20:12	0
23779	99	32	3,26	cyclictest	12	-21	ksoftirqd/0	11:15:12	0
23803	99	31	16,10	cyclictest	0	-21	swapper/3	11:30:14	3
23795	99	31	12,12	cyclictest	27	-21	ksoftirqd/2	10:40:13	2
23795	99	30	3,22	cyclictest	26573	-21	ssh	12:35:13	2
23795	99	30	2,20	cyclictest	273	46	irq/40-dwc2_hso	07:40:13	2
23779	99	30	4,17	cyclictest	12	-21	ksoftirqd/0	10:55:12	0
23803	99	29	2,18	cyclictest	0	-21	swapper/3	08:25:12	3
23779	99	29	5,18	cyclictest	15	1	rcuc/0	11:30:13	0
23803	99	28	17,7	cyclictest	359	66	irq/58-eth0	12:10:14	3
23803	99	28	16,8	cyclictest	359	66	irq/58-eth0	09:50:14	3
23795	99	28	3,16	cyclictest	273	46	irq/40-dwc2_hso	08:55:13	2
23795	99	28	2,6	cyclictest	10779	-21	rm	11:15:13	2
23795	99	28	2,19	cyclictest	0	-21	swapper/2	10:00:15	2
23795	99	28	2,19	cyclictest	0	-21	swapper/2	08:20:12	2
23795	99	28	2,17	cyclictest	273	46	irq/40-dwc2_hso	08:25:12	2
23795	99	28	2,15	cyclictest	273	46	irq/40-dwc2_hso	09:15:13	2
23780	99	28	1,6	cyclictest	0	-21	swapper/1	08:05:15	1
23780	99	28	13,10	cyclictest	21	-21	ksoftirqd/1	07:30:15	1
23780	99	28	13,10	cyclictest	21	-21	ksoftirqd/1	07:30:14	1
23780	99	28	1,20	cyclictest	10046	-21	ssh	09:10:14	1
23780	99	28	1,19	cyclictest	19912	-21	ssh	11:20:14	1
23779	99	28	1,4	cyclictest	23881	-21	apt-get	11:40:10	0
23803	99	27	5,14	cyclictest	0	-21	swapper/3	10:35:14	3
23795	99	27	3,17	cyclictest	273	46	irq/40-dwc2_hso	08:15:13	2
23795	99	27	1,14	cyclictest	31647	-21	ssh	12:20:15	2
23803	99	26	2,15	cyclictest	0	-21	swapper/3	10:10:12	3
23795	99	26	5,14	cyclictest	21982	-21	ssh	10:10:13	2
23795	99	26	2,16	cyclictest	273	46	irq/40-dwc2_hso	09:30:11	2
23795	99	26	12,6	cyclictest	29439	-21	sshd	07:15:23	2
23803	99	25	5,12	cyclictest	0	-21	swapper/3	12:20:15	3
23803	99	25	1,17	cyclictest	0	-21	swapper/3	10:15:13	3
23795	99	25	3,10	cyclictest	24999	-21	ssh	11:05:14	2
23795	99	25	1,9	cyclictest	32193	-21	ssh	09:40:05	2
23795	99	25	11,12	cyclictest	9276	-21	sshd	12:05:32	2
23779	99	25	3,17	cyclictest	19213	-21	sh	09:15:14	0
23779	99	25	2,17	cyclictest	12	-21	ksoftirqd/0	09:05:12	0
23779	99	25	14,8	cyclictest	0	-21	swapper/0	11:50:12	0
23803	99	24	6,10	cyclictest	359	66	irq/58-eth0	10:45:15	3
23795	99	24	14,7	cyclictest	0	-21	swapper/2	12:10:23	2
23795	99	24	1,20	cyclictest	5333	-21	latency_hist	11:30:02	2
23795	99	24	1,16	cyclictest	5790	-21	ls	07:25:01	2
23779	99	24	16,6	cyclictest	14059	-21	ssh	09:30:11	0
23779	99	24	13,3	cyclictest	12	-21	ksoftirqd/0	11:20:32	0
23779	99	24	1,19	cyclictest	32613	-21	find	09:00:10	0
23803	99	23	4,11	cyclictest	0	-21	swapper/3	09:30:12	3
23795	99	23	4,7	cyclictest	13	1	rcu_preempt	10:15:11	2
23795	99	23	1,13	cyclictest	728	-21	fschecks_count	11:45:16	2
23795	99	23	11,3	cyclictest	1655	-21	apt	11:10:12	2
23779	99	23	5,13	cyclictest	26557	-21	ssh	12:35:12	0
23779	99	23	2,16	cyclictest	27765	-21	ssh	12:00:13	0
23779	99	23	1,18	cyclictest	25861	-21	ls	10:30:02	0
23779	99	23	1,18	cyclictest	21080	-21	ssh	10:45:15	0
23803	99	22	8,10	cyclictest	0	-21	swapper/3	10:50:31	3
23803	99	22	4,11	cyclictest	0	-21	swapper/3	10:20:11	3
23803	99	22	3,15	cyclictest	0	-21	swapper/3	11:00:13	3
23803	99	22	3,12	cyclictest	0	-21	swapper/3	12:30:12	3
23803	99	22	15,4	cyclictest	0	-21	swapper/3	11:25:28	3
23803	99	22	13,6	cyclictest	359	66	irq/58-eth0	11:10:21	3
23803	99	22	11,7	cyclictest	0	-21	swapper/3	11:39:36	3
23803	99	22	10,6	cyclictest	0	-21	swapper/3	09:40:12	3
23795	99	22	5,10	cyclictest	13	1	rcu_preempt	09:10:31	2
23795	99	22	4,15	cyclictest	30847	-21	rm	10:50:19	2
23795	99	22	2,7	cyclictest	25140	-21	rm	12:33:55	2
23795	99	22	2,16	cyclictest	273	46	irq/40-dwc2_hso	10:45:13	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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