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 Fri Nov 28, 2025 12:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
20711	2	2430	2188,98	sleep0	0	-21	swapper	07:09:39	0
20793	99	168	17,106	cyclictest	3742	-21	apt-get	11:56:56	0
20793	99	167	15,127	cyclictest	29812	-21	munin-run	11:20:01	0
20793	99	162	12,109	cyclictest	8571	-21	wc	12:25:06	0
20793	99	160	17,37	cyclictest	7831	-21	df_inode	09:05:29	0
20793	99	159	15,117	cyclictest	24748	-21	awk	07:30:48	0
20793	99	157	20,28	cyclictest	22135	-21	diskstats	07:15:50	0
20793	99	157	14,24	cyclictest	15096	-21	apt-get	09:51:10	0
20793	99	154	19,108	cyclictest	25886	-21	apt-get	10:55:18	0
20793	99	154	18,38	cyclictest	6645	-21	apt-get	12:16:12	0
20793	99	154	17,114	cyclictest	5007	-21	apt-get	12:05:28	0
20793	99	153	41,21	cyclictest	30945	-21	processes	08:05:54	0
20793	99	153	20,28	cyclictest	8718	-21	diskstats	12:25:32	0
20793	99	153	17,115	cyclictest	21175	-21	df	10:25:29	0
20793	99	153	13,100	cyclictest	27803	-21	sort	07:50:05	0
20793	99	153	11,45	cyclictest	21677	-21	grep	07:15:07	0
20793	99	153	10,122	cyclictest	6524	-21	zcat	08:55:54	0
20793	99	152	9,119	cyclictest	28270	-21	sort	11:10:04	0
20793	99	152	20,27	cyclictest	2279	-21	apt-get	11:50:17	0
20793	99	152	16,110	cyclictest	29739	-21	apt-get	08:00:13	0
20793	99	152	14,115	cyclictest	23459	-21	sort	10:40:05	0
20793	99	152	13,98	cyclictest	11873	-21	apt	09:30:01	0
20793	99	152	13,116	cyclictest	6647	-21	munin-run	12:15:01	0
20793	99	152	10,116	cyclictest	8422	-21	apt-get	09:11:50	0
20793	99	151	18,23	cyclictest	32302	-21	irqstats	08:15:38	0
20793	99	151	16,96	cyclictest	11081	-21	munin-run	09:25:01	0
20793	99	151	15,24	cyclictest	20385	-21	diskstats	10:20:29	0
20793	99	151	14,112	cyclictest	27784	-21	apt-get	07:50:37	0
20793	99	151	13,117	cyclictest	24344	-21	apt	07:30:01	0
20793	99	150	19,26	cyclictest	3824	-21	/usr/sbin/munin	08:40:27	0
20793	99	150	17,23	cyclictest	30031	-21	df	11:20:26	0
20793	99	150	14,24	cyclictest	23551	-21	munin-run	07:25:02	0
20793	99	150	12,115	cyclictest	903	-21	/usr/sbin/munin	11:40:42	0
20793	99	149	21,104	cyclictest	24606	-21	ntp_states	10:45:52	0
20793	99	149	17,23	cyclictest	2098	-21	apt-get	08:30:19	0
20793	99	149	16,26	cyclictest	30728	-21	apt-get	11:25:19	0
20793	99	149	16,23	cyclictest	16932	-21	munin-run	10:00:03	0
20793	99	149	15,46	cyclictest	25355	-21	diskstats	07:35:35	0
20793	99	149	14,26	cyclictest	5313	-21	apt-get	08:50:14	0
20793	99	149	14,19	cyclictest	26136	-21	apt-get	07:40:19	0
20793	99	149	13,115	cyclictest	2011	-21	sort	08:30:03	0
20793	99	149	11,114	cyclictest	10112	-21	grep	09:16:10	0
20793	99	149	10,117	cyclictest	20004	-21	sort	10:16:00	0
20793	99	148	17,25	cyclictest	31525	-21	apt-get	11:30:17	0
20793	99	148	13,38	cyclictest	13708	-21	df_inode	09:40:28	0
20793	99	148	12,114	cyclictest	22565	-21	cron	10:35:01	0
20793	99	148	12,114	cyclictest	15137	-21	apt-config	09:50:06	0
20793	99	148	11,24	cyclictest	18712	-21	wc	10:10:23	0
20793	99	147	16,108	cyclictest	23605	-21	diskstats	10:40:31	0
20793	99	147	14,36	cyclictest	112	-21	systemd-journal	09:31:29	0
20793	99	147	14,21	cyclictest	32420	-21	df	11:35:25	0
20793	99	147	13,109	cyclictest	17156	-21	df_inode	10:00:29	0
20793	99	146	25,23	cyclictest	27027	-21	sh	11:00:54	0
20793	99	146	19,25	cyclictest	17849	-21	apt-get	10:05:20	0
20793	99	146	17,25	cyclictest	13481	-21	munin-run	09:40:03	0
20793	99	146	14,109	cyclictest	25262	-21	irqstats	10:50:40	0
20793	99	146	11,23	cyclictest	31863	-21	snmpd	12:40:04	0
20793	99	145	14,23	cyclictest	7040	-21	df_inode	09:00:31	0
20793	99	145	13,30	cyclictest	28416	-21	diskstats	11:10:33	0
20793	99	144	17,106	cyclictest	3599	-21	munin-run	08:40:03	0
20793	99	144	15,28	cyclictest	31441	-21	diskstats	08:10:31	0
20793	99	144	14,106	cyclictest	9707	-21	awk	12:30:52	0
20793	99	143	18,24	cyclictest	677	-21	irqstats	08:20:40	0
20793	99	143	14,24	cyclictest	28915	-21	/usr/sbin/munin	07:55:58	0
20793	99	143	12,30	cyclictest	1784	-21	ntpq	11:45:51	0
20793	99	142	10,23	cyclictest	4517	-21	apt-get	08:45:20	0
20793	99	141	18,25	cyclictest	4134	-21	apt-get	12:00:13	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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