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
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.

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 the highest latencies:

System rack5slot7s.osadl.org (updated Mon Dec 08, 2025 00:45:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
31616	2	2429	2173,98	sleep0	0	-21	swapper	19:08:59	0
31776	99	168	18,125	cyclictest	18643	-21	ntp_states	00:21:39	0
31776	99	162	14,123	cyclictest	28583	-21	cut	22:05:58	0
31776	99	162	11,129	cyclictest	23886	-21	cat	21:36:01	0
31776	99	158	18,29	cyclictest	1696	-21	diskstats	22:40:35	0
31776	99	158	14,120	cyclictest	10156	-21	grep	23:31:02	0
31776	99	157	14,29	cyclictest	31366	-21	/usr/sbin/munin	22:22:02	0
31776	99	157	10,122	cyclictest	12339	-21	ls	20:26:00	0
31776	99	156	15,101	cyclictest	29874	-21	diskstats	22:15:36	0
31776	99	156	14,118	cyclictest	6255	-21	users	23:06:12	0
31776	99	156	12,28	cyclictest	6149	-21	wc	19:50:06	0
31776	99	155	24,34	cyclictest	0	-21	swapper	22:45:41	0
31776	99	155	14,117	cyclictest	4680	-21	munin-run	23:00:02	0
31776	99	154	37,96	cyclictest	14670	-21	latency_hist	00:00:07	0
31776	99	154	18,23	cyclictest	32113	-21	memory	19:10:45	0
31776	99	154	18,22	cyclictest	0	-21	swapper	23:50:10	0
31776	99	154	13,28	cyclictest	27137	-21	sed	21:56:04	0
31776	99	154	13,115	cyclictest	16732	-21	df	20:55:28	0
31776	99	153	18,112	cyclictest	18149	-21	apt-get	21:06:09	0
31776	99	153	18,110	cyclictest	19382	-21	df_inode	21:10:38	0
31776	99	153	17,112	cyclictest	29280	-21	grep	22:11:00	0
31776	99	153	14,41	cyclictest	9308	-21	cut	23:26:00	0
31776	99	153	13,97	cyclictest	4800	-21	apt-get	23:00:21	0
31776	99	153	12,114	cyclictest	20003	-21	wc	00:30:22	0
31776	99	153	10,26	cyclictest	17883	-21	find	21:01:00	0
31776	99	152	15,36	cyclictest	10910	-21	munin-run	20:20:03	0
31776	99	152	13,116	cyclictest	3476	-21	grep	22:50:50	0
31776	99	152	10,119	cyclictest	31863	-21	snmpd	20:10:05	0
31776	99	152	10,119	cyclictest	20437	-21	grep	21:15:55	0
31776	99	151	35,21	cyclictest	21491	-21	wc	00:40:06	0
31776	99	151	24,21	cyclictest	0	-21	swapper	20:20:25	0
31776	99	151	21,102	cyclictest	11348	-21	diskstats	23:40:35	0
31776	99	151	20,27	cyclictest	12035	-21	apt-get	23:45:21	0
31776	99	151	17,109	cyclictest	11116	-21	apt	23:40:01	0
31776	99	151	14,28	cyclictest	6372	-21	uname	19:50:43	0
31776	99	151	13,38	cyclictest	17739	-21	modprobe	00:16:59	0
31776	99	151	13,23	cyclictest	5288	-21	munin-run	19:45:02	0
31776	99	151	13,115	cyclictest	15658	-21	grep	20:46:04	0
31776	99	151	12,26	cyclictest	14672	-21	find	20:41:01	0
31776	99	150	21,29	cyclictest	22494	-21	apt-get	21:30:24	0
31776	99	150	16,23	cyclictest	14102	-21	cron	20:40:00	0
31776	99	150	12,114	cyclictest	27610	-21	ntpq	22:00:49	0
31776	99	150	12,113	cyclictest	16022	-21	timerandwakeup	00:06:00	0
31776	99	150	10,42	cyclictest	15040	-21	grep	00:00:56	0
31776	99	150	10,118	cyclictest	21085	-21	uname	21:20:43	0
31776	99	149	20,102	cyclictest	25710	-21	apt-get	21:50:18	0
31776	99	149	19,26	cyclictest	18793	-1	kworker/u3:6	00:25:21	0
31776	99	149	15,23	cyclictest	3086	-21	diskstats	19:30:37	0
31776	99	149	13,98	cyclictest	24812	-21	latency_hist	21:45:01	0
31776	99	149	13,112	cyclictest	16755	-21	cut	00:10:58	0
31776	99	148	14,29	cyclictest	2460	-21	ntp_kernel_err	19:25:48	0
31776	99	148	11,112	cyclictest	8658	-21	sed	23:21:03	0
31776	99	147	9,113	cyclictest	15933	-21	sshd	20:50:28	0
31776	99	147	39,19	cyclictest	13157	-21	/usr/sbin/munin	20:31:01	0
31776	99	147	14,109	cyclictest	7460	-21	sort	23:15:47	0
31776	99	147	12,112	cyclictest	6643	-21	grep	23:10:44	0
31776	99	147	12,112	cyclictest	1382	-21	apt-get	19:20:15	0
31776	99	147	10,112	cyclictest	8178	-21	ps	20:00:54	0
31776	99	146	9,27	cyclictest	1197	-21	awk	22:35:57	0
31776	99	146	8,117	cyclictest	9937	-21	awk	20:11:03	0
31776	99	146	20,106	cyclictest	4468	-21	cron	19:40:02	0
31776	99	146	16,27	cyclictest	25024	-21	diskstats	21:45:34	0
31776	99	146	12,22	cyclictest	1189	-21	unixbench_singl	19:16:19	0
31776	99	146	10,28	cyclictest	473	-21	grep	22:31:01	0
31776	99	145	20,100	cyclictest	21796	-21	df	21:25:26	0
31776	99	145	12,113	cyclictest	32267	-21	grep	22:26:12	0
31776	99	143	14,104	cyclictest	7682	-21	apt	20:00:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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