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 Sun Aug 02, 2026 00:45:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
19216	99	73	27,8	cyclictest	13	1	rcu_preempt	00:05:17	1
19224	99	63	1,58	cyclictest	0	-21	swapper/2	22:55:13	2
19208	99	59	3,5	cyclictest	13	1	rcu_preempt	21:30:10	0
19216	99	55	2,43	cyclictest	11030	-21	ssh	22:25:13	1
19224	99	54	1,42	cyclictest	0	-21	swapper/2	22:35:16	2
19216	99	54	2,38	cyclictest	7316	-21	ssh	22:05:12	1
19208	99	53	4,30	cyclictest	5297	-21	ssh	21:10:13	0
19216	99	51	4,32	cyclictest	16351	-21	ssh	22:10:14	1
19216	99	51	1,41	cyclictest	14690	-21	ssh	22:45:13	1
19208	99	51	4,38	cyclictest	22305	-21	ssh	23:25:13	0
19208	99	51	19,24	cyclictest	12	-21	ksoftirqd/0	23:15:14	0
19224	99	49	1,38	cyclictest	0	-21	swapper/2	21:10:15	2
19208	99	49	3,31	cyclictest	6388	-21	ssh	00:10:13	0
19208	99	49	3,31	cyclictest	6388	-21	ssh	00:10:12	0
19216	99	48	3,32	cyclictest	23303	-21	ssh	21:20:12	1
19216	99	48	1,38	cyclictest	17080	-21	ssh	23:40:13	1
19216	99	48	1,34	cyclictest	23779	-21	ssh	22:50:14	1
19224	99	47	1,41	cyclictest	0	-21	swapper/2	22:45:14	2
19208	99	47	35,8	cyclictest	23291	-21	apt-get	21:20:12	0
19233	99	46	2,30	cyclictest	359	66	irq/58-eth0	21:20:13	3
19224	99	46	1,41	cyclictest	0	-21	swapper/2	22:25:13	2
19224	99	46	1,40	cyclictest	19364	-21	apt-get	19:10:10	2
19224	99	46	1,37	cyclictest	0	-21	swapper/2	20:25:11	2
19224	99	46	0,40	cyclictest	273	46	irq/40-dwc2_hso	19:20:14	2
19216	99	46	2,33	cyclictest	3609	-21	ssh	21:45:14	1
19208	99	46	31,10	cyclictest	26981	-21	ssh	21:40:12	0
19208	99	46	17,18	cyclictest	12029	-21	cat	00:30:20	0
19208	99	46	16,15	cyclictest	1	-21	systemd	23:40:03	0
19233	99	45	3,26	cyclictest	359	66	irq/58-eth0	22:35:14	3
19224	99	45	2,40	cyclictest	0	-21	swapper/2	22:05:13	2
19224	99	45	1,41	cyclictest	18313	-21	apt-get	20:50:13	2
19224	99	45	1,41	cyclictest	18313	-21	apt-get	20:50:13	2
19216	99	45	2,36	cyclictest	19997	-21	ssh	22:30:15	1
19208	99	45	2,36	cyclictest	24448	-21	ssh	00:20:13	0
19208	99	45	17,11	cyclictest	29995	-21	diskstats	00:05:20	0
19233	99	44	2,27	cyclictest	359	66	irq/58-eth0	20:35:12	3
19224	99	44	2,38	cyclictest	0	-21	swapper/2	23:20:15	2
19224	99	44	1,36	cyclictest	15393	-21	ssh	00:15:14	2
19224	99	44	0,40	cyclictest	0	-21	swapper/2	20:40:14	2
19224	99	44	0,38	cyclictest	0	-21	swapper/2	22:00:14	2
19208	99	44	38,3	cyclictest	3805	-21	apt-get	20:35:12	0
19208	99	44	18,9	cyclictest	9890	-21	ssh	23:53:12	0
19208	99	44	17,7	cyclictest	2463	-21	ntp_states	20:30:26	0
19208	99	44	16,11	cyclictest	11706	-21	ssh	21:49:28	0
19208	99	44	16,10	cyclictest	19800	-21	ssh	23:22:29	0
19208	99	44	15,18	cyclictest	15507	-21	diskstats	00:15:15	0
19233	99	43	5,24	cyclictest	359	66	irq/58-eth0	22:50:13	3
19224	99	43	1,39	cyclictest	0	-21	swapper/2	19:35:12	2
19208	99	43	38,2	cyclictest	25423	-21	apt-get	19:50:14	0
19208	99	43	30,9	cyclictest	12631	-21	apt-get	21:50:11	0
19208	99	43	18,10	cyclictest	27775	-21	rm	22:33:57	0
19208	99	43	17,9	cyclictest	14774	-21	ssh	23:37:46	0
19208	99	43	16,10	cyclictest	26075	-21	ssh	23:45:10	0
19208	99	43	15,16	cyclictest	2079	-21	ssh	23:12:59	0
19208	99	43	15,11	cyclictest	32299	-21	cut	23:30:20	0
19208	99	43	14,9	cyclictest	14416	-21	diskstats	21:15:16	0
19208	99	43	13,14	cyclictest	3263	-21	kthreadcore	20:00:20	0
19233	99	42	3,25	cyclictest	359	66	irq/58-eth0	00:00:13	3
19233	99	42	2,22	cyclictest	359	66	irq/58-eth0	22:15:13	3
19224	99	42	2,35	cyclictest	11810	-21	apt-get	23:55:15	2
19224	99	42	1,37	cyclictest	0	-21	swapper/2	20:35:10	2
19224	99	42	1,36	cyclictest	0	-21	swapper/2	22:20:11	2
19224	99	42	1,19	cyclictest	2916	-21	grep	19:25:19	2
19224	99	42	0,27	cyclictest	22279	-21	cut	21:55:19	2
19216	99	42	2,34	cyclictest	15378	-21	ssh	00:15:14	1
19216	99	42	2,33	cyclictest	25368	-21	ssh	22:15:14	1
19208	99	42	36,2	cyclictest	7310	-21	apt-get	22:05:14	0
19208	99	42	34,5	cyclictest	20744	-21	apt-get	00:00:14	0
19208	99	42	19,9	cyclictest	17167	-21	tune2fs	20:15:18	0
19208	99	42	17,10	cyclictest	12379	-21	ssh	22:42:45	0
19208	99	42	16,10	cyclictest	20962	-21	ssh	22:47:11	0
19208	99	42	15,10	cyclictest	30504	-21	ssh	22:15:55	0
19208	99	42	15,10	cyclictest	23730	-21	ssh	22:13:34	0
19208	99	42	14,15	cyclictest	0	-21	swapper/0	23:02:56	0
19208	99	42	10,19	cyclictest	32729	-21	ssh	22:55:13	0
19233	99	41	2,25	cyclictest	359	66	irq/58-eth0	00:25:12	3
19233	99	41	2,19	cyclictest	0	-21	swapper/3	21:45:14	3
19224	99	41	1,35	cyclictest	0	-21	swapper/2	22:50:13	2
19224	99	41	0,26	cyclictest	2227	-21	cut	21:05:21	2
19216	99	41	3,4	cyclictest	13	1	rcu_preempt	21:40:12	1
19208	99	41	16,9	cyclictest	8705	-21	ssh	22:22:43	0
19208	99	41	16,16	cyclictest	13156	-21	/usr/sbin/munin	20:40:33	0
19208	99	41	15,9	cyclictest	4027	-21	ssh	22:38:36	0
19208	99	41	15,9	cyclictest	11852	-21	cut	22:25:21	0
19208	99	41	15,11	cyclictest	24637	-21	ssh	00:36:19	0
19208	99	41	15,10	cyclictest	30520	-21	ssh	22:52:52	0
19208	99	41	15,10	cyclictest	26416	-21	ssh	21:39:57	0
19208	99	41	14,10	cyclictest	29847	-21	ssh	21:59:28	0
19224	99	40	1,35	cyclictest	0	-21	swapper/2	20:45:13	2
19224	99	40	1,35	cyclictest	0	-21	swapper/2	00:00:14	2
19224	99	40	0,23	cyclictest	0	-21	swapper/2	23:14:32	2
19216	99	40	2,24	cyclictest	18431	-21	ssh	23:05:15	1
19208	99	40	18,10	cyclictest	27423	1	cat	19:15:23	0
19208	99	40	16,8	cyclictest	7040	-21	ssh	21:28:15	0
19208	99	40	16,10	cyclictest	3418	-21	ssh	22:00:48	0
19208	99	40	15,9	cyclictest	11754	-21	ssh	23:55:12	0
19208	99	40	14,13	cyclictest	28871	-21	kthreadcore	20:25:20	0
19208	99	40	13,12	cyclictest	22067	-21	ssh	23:05:27	0
19208	99	40	13,11	cyclictest	9267	-21	kthreadcore	20:05:20	0
19208	99	40	11,15	cyclictest	22195	-21	grep	20:50:30	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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