OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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 792 highest latencies:

System rack7slot3s.osadl.org (updated Fri Oct 23, 2026 06:45:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1071425	99	131	4,10	cyclictest	17	1	rcu_preempt	06:05:33	1
1071425	99	131	4,10	cyclictest	17	1	rcu_preempt	06:05:33	1
1071425	99	123	115,6	cyclictest	1077050	-21	kworker/u8:0+events_unbound	05:37:37	1
1071425	99	106	97,7	cyclictest	0	-21	swapper/1	05:42:35	1
1071425	99	90	78,6	cyclictest	91	-21	hwrng	06:33:35	1
1071425	99	90	78,6	cyclictest	91	-21	hwrng	06:33:35	1
1071425	99	78	45,30	cyclictest	1824467	-21	grep	06:11:17	1
1071424	99	78	29,46	cyclictest	0	-21	swapper/0	06:11:32	0
1071424	99	78	1,61	cyclictest	1538779	-21	spawn	06:03:01	0
1071424	99	76	1,50	cyclictest	0	-21	swapper/0	06:09:03	0
1071424	99	76	1,50	cyclictest	0	-21	swapper/0	06:09:03	0
1071424	99	74	42,29	cyclictest	1339625	-21	sh	05:42:53	0
1071424	99	73	2,7	cyclictest	1350157	-21	execl	05:49:07	0
1071425	99	72	66,4	cyclictest	1350075	-21	kworker/u8:3+events_unbound	06:28:27	1
1071425	99	72	66,4	cyclictest	1350075	-21	kworker/u8:3+events_unbound	06:28:27	1
1071425	99	68	36,4	cyclictest	1422771	-21	spawn	06:01:53	1
1071427	99	66	57,6	cyclictest	1071423	-21	cyclictest	06:10:32	3
1071425	99	66	49,13	cyclictest	1350437	-21	sh	05:52:01	1
1071427	99	65	56,6	cyclictest	1734762	-21	sh	06:08:18	3
1071427	99	65	56,6	cyclictest	1734762	-21	sh	06:08:18	3
1071427	99	63	52,6	cyclictest	1290945	-21	tee	05:41:24	3
1071426	99	63	54,6	cyclictest	1664718	-21	looper	06:06:42	2
1071426	99	63	54,6	cyclictest	1664718	-21	looper	06:06:42	2
1071426	99	63	53,8	cyclictest	1253477	-21	sh	05:40:15	2
1071424	99	62	1,42	cyclictest	1102190	-21	spawn	05:33:23	0
1071426	99	61	49,9	cyclictest	1798930	-21	sh	06:10:25	2
1071424	99	58	37,5	cyclictest	1350524	-21	fstime	05:54:49	0
1071424	99	57	33,5	cyclictest	1838326	-21	grep	06:30:25	0
1071424	99	57	33,5	cyclictest	1838326	-21	grep	06:30:25	0
1071425	99	56	44,10	cyclictest	91	-21	hwrng	05:16:47	1
1071424	99	55	25,7	cyclictest	16	1	ktimers/0	05:26:57	0
1071427	99	53	42,8	cyclictest	1353611	-21	spawn	06:01:57	3
1071424	99	53	46,4	cyclictest	19	1	rcuc/0	05:36:55	0
1071424	99	53	24,18	cyclictest	0	-21	swapper/0	05:55:49	0
1071425	99	52	1,6	cyclictest	17	1	rcu_preempt	05:49:19	1
1071425	99	52	0,48	cyclictest	1076385	-21	fstime	05:22:16	1
1071427	99	51	37,9	cyclictest	0	-21	swapper/3	05:35:01	3
1071426	99	51	38,9	cyclictest	1350155	-21	execl	05:49:28	2
1071425	99	51	3,7	cyclictest	270	50	irq/217-eth1-TxRx-1	05:14:01	1
1071427	99	50	41,7	cyclictest	1350130	-21	execl	05:48:50	3
1071426	99	49	36,11	cyclictest	1445673	-21	spawn	06:02:30	2
1071424	99	49	33,3	cyclictest	269	50	irq/216-eth1-TxRx-0	06:20:00	0
1071425	99	48	41,5	cyclictest	1077050	-21	kworker/u8:0+events_unbound	06:17:51	1
1071426	99	47	33,10	cyclictest	0	-21	swapper/2	05:15:00	2
1071425	99	47	27,13	cyclictest	24	1	irq_work/1	05:34:05	1
1071427	99	46	37,5	cyclictest	0	-21	swapper/3	06:25:00	3
1071427	99	46	35,8	cyclictest	1196528	-21	sh	05:37:19	3
1071427	99	45	38,5	cyclictest	1042008	-21	kworker/u8:1+events_unbound	05:17:34	3
1071427	99	45	36,5	cyclictest	0	-21	swapper/3	05:52:04	3
1071424	99	45	22,4	cyclictest	1076442	-21	modprobe	05:25:01	0
1071426	99	44	38,4	cyclictest	91	-21	hwrng	05:05:31	2
1071427	99	43	37,4	cyclictest	91	-21	hwrng	05:28:03	3
1071426	99	43	37,4	cyclictest	1071423	-21	cyclictest	06:35:01	2
1071426	99	43	37,4	cyclictest	1071423	-21	cyclictest	06:35:01	2
1071424	99	43	28,3	cyclictest	269	50	irq/216-eth1-TxRx-0	05:15:00	0
1071426	99	42	29,9	cyclictest	0	-21	swapper/2	05:20:00	2
1071424	99	42	15,12	cyclictest	1837250	-21	ntp_states	06:26:23	0
1071424	99	42	15,12	cyclictest	1837250	-21	ntp_states	06:26:23	0
1071427	99	41	7,4	cyclictest	17	1	rcu_preempt	06:25:50	3
1071427	99	41	7,4	cyclictest	17	1	rcu_preempt	06:25:50	3
1071426	99	41	35,4	cyclictest	0	-21	swapper/2	05:37:28	2
1071426	99	40	33,5	cyclictest	91	-21	hwrng	06:26:25	2
1071426	99	40	33,5	cyclictest	91	-21	hwrng	06:26:25	2
1071426	99	40	10,5	cyclictest	269	50	irq/216-eth1-TxRx-0	05:55:34	2
1071425	99	40	32,6	cyclictest	1067511	-21	kworker/u8:2+events_unbound	05:07:41	1
1071425	99	40	28,8	cyclictest	1836210	-21	modprobe	06:25:00	1
1071427	99	39	31,5	cyclictest	1350881	-21	telnet	05:55:19	3
1071426	99	39	32,4	cyclictest	0	-21	swapper/2	05:54:40	2
1071424	99	38	1,21	cyclictest	1074757	-21	cut	05:15:20	0
1071427	99	37	25,9	cyclictest	0	-21	swapper/3	05:25:01	3
1071426	99	37	29,6	cyclictest	1071161	-21	kworker/u8:4+flush-179:96	05:22:42	2
1071426	99	37	29,6	cyclictest	1070997	-21	kworker/u8:3+events_unbound	05:27:48	2
1071425	99	37	26,8	cyclictest	0	-21	swapper/1	05:55:25	1
1071425	99	36	6,9	cyclictest	269	50	irq/216-eth1-TxRx-0	05:26:01	1
1071427	99	35	29,4	cyclictest	91	-21	hwrng	06:30:31	3
1071427	99	35	29,4	cyclictest	91	-21	hwrng	06:30:31	3
1071427	99	35	27,5	cyclictest	0	-21	swapper/3	05:10:43	3
1071424	99	35	24,3	cyclictest	269	50	irq/216-eth1-TxRx-0	05:05:10	0
1071424	99	35	1,4	cyclictest	1839513	-21	unix_chkpwd	06:40:00	0
1071424	99	33	21,8	cyclictest	0	-21	swapper/0	06:25:00	0
1071427	99	32	1,14	cyclictest	0	-21	swapper/3	05:05:37	3
1071427	99	30	23,4	cyclictest	0	-21	swapper/3	05:05:01	3
1071427	99	30	23,4	cyclictest	0	-21	swapper/3	05:05:01	3
1071427	99	30	21,5	cyclictest	0	-21	swapper/3	06:40:01	3
1071426	99	30	25,3	cyclictest	1093163	-21	spawn	05:33:16	2
1071426	99	30	22,5	cyclictest	0	-21	swapper/2	06:40:00	2
1071426	99	27	19,6	cyclictest	1835949	-21	date	06:17:00	2
1071425	99	26	17,5	cyclictest	1839510	-21	cron	06:40:00	1
1071424	99	25	15,7	cyclictest	1071559	-21	cut	05:05:02	0
1071424	99	25	15,7	cyclictest	1071559	-21	cut	05:05:02	0
1071426	99	24	15,6	cyclictest	0	-21	swapper/2	06:25:01	2
1071427	99	23	2,16	cyclictest	1836163	-21	latency_hist	06:20:01	3
1071426	99	22	11,9	cyclictest	1071432	-21	cat	05:05:01	2
1071426	99	22	11,9	cyclictest	1071432	-21	cat	05:05:01	2
1071425	99	18	11,4	cyclictest	0	-21	swapper/1	05:05:02	1
1071425	99	18	11,4	cyclictest	0	-21	swapper/1	05:05:02	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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