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 Sat Apr 18, 2026 00:45:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
22161	99	56	46,7	cyclictest	359	66	irq/58-eth0	23:10:11	3
22140	99	52	2,36	cyclictest	12024	-21	ssh	23:00:13	1
22131	99	51	2,44	cyclictest	8391	-21	ssh	22:40:11	0
22131	99	50	9,39	cyclictest	2964	-21	ssh	22:55:14	0
22131	99	49	5,7	cyclictest	13	1	rcu_preempt	20:00:13	0
22131	99	49	4,35	cyclictest	4807	-21	ssh	22:20:12	0
22131	99	49	3,41	cyclictest	30042	-21	ssh	23:10:12	0
22131	99	49	32,7	cyclictest	12	-21	ksoftirqd/0	23:05:15	0
22131	99	48	3,7	cyclictest	13	1	rcu_preempt	21:30:12	0
22161	99	47	1,2	cyclictest	0	-21	swapper/3	22:30:12	3
22140	99	46	1,37	cyclictest	2877	-21	ssh	21:25:13	1
22131	99	46	2,13	cyclictest	17467	-21	sh	00:15:15	0
22131	99	46	2,13	cyclictest	17467	-21	sh	00:15:15	0
22131	99	46	1,38	cyclictest	1293	-21	ssh	23:30:12	0
22161	99	43	1,4	cyclictest	0	-21	swapper/3	21:45:13	3
22140	99	43	4,32	cyclictest	12061	-21	ssh	00:30:13	1
22131	99	43	2,12	cyclictest	25738	-21	apt-get	20:55:04	0
22131	99	42	5,9	cyclictest	0	-21	swapper/0	00:00:14	0
22131	99	42	3,28	cyclictest	12	-21	ksoftirqd/0	21:35:13	0
22131	99	42	3,28	cyclictest	12	-21	ksoftirqd/0	21:35:12	0
22131	99	42	2,30	cyclictest	26442	-21	ssh	00:20:13	0
22131	99	41	5,33	cyclictest	10259	-21	ssh	23:35:14	0
22131	99	40	1,30	cyclictest	8292	-21	rm	21:10:12	0
22161	99	39	2,3	cyclictest	0	-21	swapper/3	21:10:11	3
22150	99	39	2,30	cyclictest	17396	-21	ssh	22:45:12	2
22140	99	39	4,21	cyclictest	26347	-21	ssh	22:50:13	1
22131	99	39	0,35	cyclictest	13847	-21	ssh	22:25:13	0
22161	99	38	26,9	cyclictest	359	66	irq/58-eth0	23:35:12	3
22140	99	38	5,22	cyclictest	21	-21	ksoftirqd/1	23:55:14	1
22140	99	38	1,29	cyclictest	8404	-21	ssh	22:40:13	1
22131	99	38	1,9	cyclictest	6664	-21	latency_hist	20:35:02	0
22131	99	38	1,11	cyclictest	3775	-21	tr	21:25:19	0
22131	99	37	1,12	cyclictest	20783	-21	latency_hist	23:05:01	0
22131	99	37	1,10	cyclictest	3462	-21	ssh	22:00:18	0
22150	99	36	9,12	cyclictest	27	-21	ksoftirqd/2	22:19:21	2
22150	99	36	11,9	cyclictest	24622	-21	apt-get	23:25:13	2
22131	99	36	7,4	cyclictest	31095	-21	kthreadcore	20:25:17	0
22131	99	36	1,11	cyclictest	25638	-21	needreboot	19:10:22	0
22161	99	35	5,26	cyclictest	359	66	irq/58-eth0	00:15:13	3
22161	99	35	5,26	cyclictest	359	66	irq/58-eth0	00:15:13	3
22161	99	35	24,6	cyclictest	359	66	irq/58-eth0	22:40:11	3
22131	99	35	2,24	cyclictest	18405	-21	cut	21:50:21	0
22131	99	35	2,22	cyclictest	19232	-21	ssh	22:10:13	0
22131	99	35	2,22	cyclictest	19232	-21	ssh	22:10:13	0
22131	99	35	2,19	cyclictest	20049	-21	kworker/u8:0	22:30:14	0
22131	99	35	1,12	cyclictest	25212	-21	unixbench_singl	00:35:29	0
22131	99	35	11,20	cyclictest	15257	-21	sh	23:20:01	0
22131	99	35	1,11	cyclictest	6881	-21	if_eth0	21:45:17	0
22131	99	35	1,11	cyclictest	5604	-21	kthreadcore	23:50:19	0
22131	99	35	1,10	cyclictest	28498	-21	cat	20:20:28	0
22161	99	34	1,3	cyclictest	0	-21	swapper/3	00:25:14	3
22140	99	34	1,26	cyclictest	17395	-21	ssh	22:45:12	1
22131	99	34	5,5	cyclictest	15334	-21	kthreadcore	00:30:23	0
22131	99	34	2,26	cyclictest	31914	-21	sh	00:05:12	0
22131	99	34	1,9	cyclictest	24600	-21	/usr/sbin/munin	23:25:28	0
22131	99	34	1,11	cyclictest	18986	-21	grep	20:10:28	0
22131	99	34	1,10	cyclictest	24427	-21	latency_hist	23:25:01	0
22131	99	34	1,10	cyclictest	13786	-21	cat	22:05:24	0
22161	99	33	2,2	cyclictest	0	-21	swapper/3	19:15:13	3
22161	99	33	2,24	cyclictest	359	66	irq/58-eth0	23:00:13	3
22161	99	33	1,5	cyclictest	0	-21	swapper/3	22:55:13	3
22131	99	33	4,18	cyclictest	13897	-21	ssh	23:55:11	0
22131	99	33	4,15	cyclictest	29966	-21	ssh	21:40:12	0
22131	99	33	2,11	cyclictest	26525	-21	perl	21:20:16	0
22131	99	33	1,8	cyclictest	26031	-21	cat	21:20:02	0
22131	99	33	1,13	cyclictest	804	-21	ssh	22:35:20	0
22131	99	33	1,12	cyclictest	22484	-21	grep	19:40:27	0
22131	99	33	1,11	cyclictest	30258	-21	switchtime	22:50:27	0
22131	99	33	1,10	cyclictest	7913	-21	timerandwakeup	19:25:28	0
22131	99	33	1,10	cyclictest	4037	-21	latency_hist	19:25:01	0
22131	99	33	1,10	cyclictest	27735	-21	kthreadcore	19:15:21	0
22131	99	33	1,10	cyclictest	11753	-21	tr	00:10:21	0
22150	99	32	3,21	cyclictest	0	-21	swapper/2	00:30:14	2
22150	99	32	2,19	cyclictest	31768	-21	ssh	22:35:13	2
22140	99	32	1,20	cyclictest	26288	-21	ssh	21:20:13	1
22131	99	32	1,11	cyclictest	24094	-21	irqrtprio	19:45:17	0
22131	99	32	1,11	cyclictest	20208	-21	unixbench_singl	20:45:27	0
22131	99	32	1,11	cyclictest	12237	-21	kthreadcore	20:05:19	0
22131	99	32	1,10	cyclictest	2374	-21	grep	21:00:29	0
22161	99	31	2,4	cyclictest	0	-21	swapper/3	21:05:13	3
22161	99	31	2,3	cyclictest	0	-21	swapper/3	21:40:13	3
22161	99	31	1,16	cyclictest	359	66	irq/58-eth0	00:30:12	3
22150	99	31	8,8	cyclictest	0	-21	swapper/2	22:40:14	2
22140	99	31	3,15	cyclictest	21	-21	ksoftirqd/1	23:25:13	1
22131	99	31	3,9	cyclictest	29319	-21	kthreadcore	19:50:18	0
22131	99	31	2,7	cyclictest	638	-21	users	22:15:31	0
22131	99	31	0,10	cyclictest	6780	-21	ntpq	21:05:23	0
22161	99	30	2,5	cyclictest	0	-21	swapper/3	23:15:12	3
22161	99	30	17,8	cyclictest	359	66	irq/58-eth0	21:50:13	3
22161	99	30	1,4	cyclictest	0	-21	swapper/3	23:30:13	3
22161	99	30	1,4	cyclictest	0	-21	swapper/3	21:30:12	3
22150	99	30	4,15	cyclictest	273	46	irq/40-dwc2_hso	22:05:13	2
22150	99	30	2,21	cyclictest	0	-21	swapper/2	20:35:14	2
22150	99	30	2,12	cyclictest	17280	-21	ssh	21:15:13	2
22150	99	30	0,16	cyclictest	0	-21	swapper/2	22:30:13	2
22140	99	30	2,20	cyclictest	28286	-21	sh	23:45:12	1
22131	99	30	1,10	cyclictest	6688	-21	grep	00:25:25	0
22131	99	30	1,10	cyclictest	3724	-21	kthreadcore	19:55:21	0
22131	99	30	1,10	cyclictest	30291	-21	cut	23:45:20	0
22131	99	30	1,10	cyclictest	25212	-21	irqcore	21:55:17	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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