OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #7

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.

Total number of samples: 50.5 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of all highest latencies:

System rack5slot7s.osadl.org (updated Sun Mar 01, 2026 12:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
27072	2	2435	2186,90	sleep0	0	-21	swapper	07:07:55	0
27350	99	165	11,115	cyclictest	9142	-21	/usr/sbin/munin	11:51:57	0
27350	99	164	16,124	cyclictest	15711	-21	df_inode	09:15:31	0
27350	99	164	16,122	cyclictest	4326	-21	apt-get	11:25:26	0
27350	99	162	14,25	cyclictest	17126	-21	apt-get	09:26:06	0
27350	99	160	12,123	cyclictest	31195	-21	df_inode	10:50:30	0
27350	99	159	18,112	cyclictest	13219	-21	apt-get	09:00:17	0
27350	99	158	15,117	cyclictest	26166	-21	latency_hist	10:20:01	0
27350	99	158	14,26	cyclictest	13190	-21	grep	12:15:55	0
27350	99	158	12,121	cyclictest	6687	-21	munin-run	08:20:02	0
27350	99	157	12,29	cyclictest	5928	-21	head	11:31:10	0
27350	99	156	19,109	cyclictest	12568	-21	irqstats	08:55:39	0
27350	99	156	13,25	cyclictest	22954	-21	apt	10:00:01	0
27350	99	155	16,22	cyclictest	11604	-21	apt-get	08:50:18	0
27350	99	155	13,118	cyclictest	19868	-21	/usr/sbin/munin	09:40:35	0
27350	99	154	40,21	cyclictest	992	-21	latency_hist	11:05:04	0
27350	99	154	18,112	cyclictest	3697	-21	df_inode	08:00:29	0
27350	99	154	17,113	cyclictest	30311	-21	df_inode	07:25:31	0
27350	99	154	16,114	cyclictest	3347	-21	munin-run	11:20:02	0
27350	99	154	15,115	cyclictest	32497	-21	munin-run	07:40:02	0
27350	99	153	17,24	cyclictest	6781	-21	apt	11:40:01	0
27350	99	153	16,37	cyclictest	24773	-21	df_inode	10:10:28	0
27350	99	153	15,115	cyclictest	32540	-21	users	10:56:04	0
27350	99	153	14,23	cyclictest	30105	-21	munin-run	07:25:02	0
27350	99	153	14,112	cyclictest	19718	-21	sshd	09:36:29	0
27350	99	153	12,117	cyclictest	7112	-21	cat	11:40:41	0
27350	99	153	11,24	cyclictest	4610	-21	sort	08:05:40	0
27350	99	153	10,27	cyclictest	11493	-21	ps	12:05:53	0
27350	99	153	10,114	cyclictest	4094	-21	unixbench_singl	11:21:00	0
27350	99	152	21,28	cyclictest	27447	-21	apt-get	07:10:21	0
27350	99	152	19,106	cyclictest	27200	-21	diskstats	10:25:32	0
27350	99	152	18,25	cyclictest	32617	-21	apt-get	07:40:19	0
27350	99	152	18,24	cyclictest	21703	-21	memory	09:50:42	0
27350	99	152	13,120	cyclictest	26978	-21	modprobe	10:25:00	0
27350	99	152	13,100	cyclictest	17138	-21	gpgv	09:25:05	0
27350	99	151	9,119	cyclictest	18257	-21	apt-get	09:30:14	0
27350	99	151	13,113	cyclictest	9956	-21	grep	08:40:05	0
27350	99	151	13,101	cyclictest	8499	-21	df_inode	08:30:26	0
27350	99	151	12,26	cyclictest	31689	-21	latency_hist	07:35:04	0
27350	99	151	12,113	cyclictest	29729	-21	sort	10:40:40	0
27350	99	150	18,109	cyclictest	2479	-21	apt-get	07:52:01	0
27350	99	150	15,24	cyclictest	14713	-21	/usr/sbin/munin	12:25:51	0
27350	99	150	14,23	cyclictest	12036	-21	diskstats	12:10:30	0
27350	99	150	14,114	cyclictest	1945	-21	df_inode	11:10:28	0
27350	99	150	13,27	cyclictest	15979	-21	/usr/sbin/munin	12:35:33	0
27350	99	150	13,113	cyclictest	23492	-21	rt-features	10:00:55	0
27350	99	150	12,114	cyclictest	6807	-21	apt-get	08:20:20	0
27350	99	149	9,116	cyclictest	3139	-21	wc	07:55:59	0
27350	99	149	35,94	cyclictest	10649	-21	grep	08:41:02	0
27350	99	149	18,36	cyclictest	13838	-21	memory	12:20:41	0
27350	99	149	15,95	cyclictest	10448	-21	diskstats	12:00:33	0
27350	99	149	15,108	cyclictest	14009	-21	/usr/sbin/munin	09:05:57	0
27350	99	149	13,111	cyclictest	29317	-21	grep	10:36:02	0
27350	99	148	9,115	cyclictest	1577	-21	sed	07:46:02	0
27350	99	148	8,24	cyclictest	8164	-21	mailstats	11:45:57	0
27350	99	148	34,21	cyclictest	1152	-21	diskstats	11:05:29	0
27350	99	148	33,17	cyclictest	0	-21	swapper	10:45:25	0
27350	99	148	16,22	cyclictest	29233	-21	users	07:16:22	0
27350	99	148	14,24	cyclictest	27995	-21	sshd	10:30:30	0
27350	99	148	13,115	cyclictest	9516	-21	apt-get	11:55:17	0
27350	99	148	10,112	cyclictest	15185	-21	/usr/sbin/munin	12:30:10	0
27350	99	147	16,24	cyclictest	23976	-21	df_inode	10:05:27	0
27350	99	147	13,111	cyclictest	5290	-21	diskstats	08:10:30	0
27350	99	147	12,112	cyclictest	20770	-21	df_inode	09:45:27	0
27350	99	146	29,22	cyclictest	0	-21	swapper	08:25:48	0
27350	99	146	17,23	cyclictest	15464	-21	users	09:11:06	0
27350	99	146	11,92	cyclictest	10806	-21	apt-get	08:45:13	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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