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 792 highest latencies:

System rack5slot7s.osadl.org (updated Sun Jun 07, 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
9279	2	2434	2193,98	sleep0	0	-21	swapper	07:09:11	0
9417	99	163	16,102	cyclictest	1834	-21	apt-get	09:41:34	0
9417	99	161	32,22	cyclictest	29314	-21	switchtime	09:07:02	0
9417	99	161	16,105	cyclictest	21222	-21	apt	08:20:01	0
9417	99	161	10,125	cyclictest	5507	-21	apt-get	10:01:43	0
9417	99	160	17,27	cyclictest	18297	-21	irqstats	08:00:38	0
9417	99	160	12,24	cyclictest	22831	-21	modprobe	08:30:00	0
9417	99	159	33,22	cyclictest	24390	-21	sshd	11:49:47	0
9417	99	159	20,22	cyclictest	11341	-21	apt-get	10:36:36	0
9417	99	159	16,119	cyclictest	12969	-21	/usr/sbin/munin	07:30:05	0
9417	99	159	14,23	cyclictest	12967	-21	apt-get	07:30:31	0
9417	99	158	16,23	cyclictest	31522	-21	ntp_states	09:20:49	0
9417	99	157	15,119	cyclictest	18008	-21	munin-run	08:00:02	0
9417	99	156	8,109	cyclictest	25664	-21	ntp_states	08:45:50	0
9417	99	156	43,22	cyclictest	15399	-21	switchtime	10:56:01	0
9417	99	156	15,116	cyclictest	11363	-21	cut	10:35:07	0
9417	99	156	14,116	cyclictest	16493	-21	/usr/sbin/munin	11:06:02	0
9417	99	155	12,120	cyclictest	3657	-21	snmpd	07:40:57	0
9417	99	154	28,17	cyclictest	0	-21	swapper	12:19:14	0
9417	99	154	19,109	cyclictest	5290	-21	apt-get	09:56:59	0
9417	99	154	16,115	cyclictest	27683	-21	munin-run	12:10:03	0
9417	99	154	14,25	cyclictest	12176	-21	munin-run	07:25:02	0
9417	99	153	21,28	cyclictest	14195	-21	diskstats	10:50:34	0
9417	99	153	14,114	cyclictest	14206	-21	df_inode	07:35:37	0
9417	99	152	40,91	cyclictest	24577	-21	apt-get	11:50:15	0
9417	99	152	34,21	cyclictest	16172	-21	mailstats	11:00:57	0
9417	99	152	23,100	cyclictest	22131	-21	apt-get	11:40:19	0
9417	99	152	19,26	cyclictest	16032	-21	ntp_states	07:45:52	0
9417	99	152	16,112	cyclictest	27640	-21	munin-run	09:00:02	0
9417	99	152	14,23	cyclictest	31319	-21	grep	12:30:50	0
9417	99	152	13,25	cyclictest	7313	-21	cron	10:10:01	0
9417	99	152	11,28	cyclictest	20332	-21	head	11:26:02	0
9417	99	151	8,25	cyclictest	29656	-21	wc	09:10:30	0
9417	99	151	32,23	cyclictest	1782	-21	head	09:36:04	0
9417	99	151	18,113	cyclictest	26765	-21	sed	08:51:02	0
9417	99	151	16,111	cyclictest	29516	-21	df_inode	12:20:28	0
9417	99	151	14,115	cyclictest	10224	-21	munin-node	07:15:09	0
9417	99	151	13,115	cyclictest	32504	-21	munin-run	12:40:05	0
9417	99	151	11,117	cyclictest	21776	-21	grep	08:20:57	0
9417	99	151	11,116	cyclictest	12762	-21	sort	10:40:52	0
9417	99	150	8,116	cyclictest	21219	-21	latency_hist	11:35:03	0
9417	99	150	10,27	cyclictest	9616	-21	df_inode	07:10:28	0
9417	99	150	10,101	cyclictest	17431	-21	if_err_eth0	11:10:36	0
9417	99	149	9,38	cyclictest	10279	-21	wc	10:25:55	0
9417	99	149	18,22	cyclictest	0	-21	swapper	10:20:41	0
9417	99	149	16,19	cyclictest	0	-21	swapper	08:45:00	0
9417	99	149	15,111	cyclictest	27925	-21	if_eth0	12:10:36	0
9417	99	149	13,23	cyclictest	7534	-21	diskstats	10:10:31	0
9417	99	149	10,113	cyclictest	18357	-21	ls	11:15:46	0
9417	99	148	9,116	cyclictest	23046	-21	diskstats	08:30:30	0
9417	99	148	16,25	cyclictest	32462	-21	mailstats	09:25:55	0
9417	99	148	16,25	cyclictest	23732	-21	apt-get	08:35:16	0
9417	99	148	16,23	cyclictest	508	-21	irqstats	09:30:37	0
9417	99	148	13,114	cyclictest	22006	-21	sendmail	11:40:01	0
9417	99	148	12,113	cyclictest	8708	-21	cut	10:15:58	0
9417	99	148	11,114	cyclictest	26194	-21	apt	12:00:11	0
9417	99	148	11,114	cyclictest	19718	-21	apt-get	08:10:20	0
9417	99	147	17,106	cyclictest	18924	-21	apt-get	11:20:21	0
9417	99	147	16,26	cyclictest	30530	-21	/usr/sbin/munin	09:15:37	0
9417	99	147	16,110	cyclictest	2987	-21	apt-get	09:45:19	0
9417	99	147	16,108	cyclictest	25689	-21	ntp_states	11:55:52	0
9417	99	147	16,103	cyclictest	30206	-21	apt-get	12:25:16	0
9417	99	147	14,26	cyclictest	3778	-21	/usr/sbin/munin	09:50:38	0
9417	99	147	12,112	cyclictest	18934	-21	wc	08:05:22	0
9417	99	146	13,108	cyclictest	16510	-21	apt-get	07:50:18	0
9417	99	145	13,37	cyclictest	28063	-21	grep	09:00:48	0
9417	99	144	16,23	cyclictest	13396	-21	df_inode	10:45:30	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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