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 Jan 05, 2026 00:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
6131	2	2409	2155,60	sleep0	0	-21	swapper	19:06:03	0
6619	99	170	17,106	cyclictest	30674	-21	apt-get	21:35:45	0
6619	99	160	18,24	cyclictest	2043	-21	apt-get	22:01:12	0
6619	99	159	42,24	cyclictest	7394	-21	kernelversion	22:30:41	0
6619	99	159	36,22	cyclictest	27059	-21	ntp_kernel_pll_	00:25:48	0
6619	99	159	16,118	cyclictest	22433	-21	apt-get	00:01:47	0
6619	99	158	21,108	cyclictest	11194	-21	apt-get	22:55:18	0
6619	99	158	10,126	cyclictest	6857	-21	cut	22:25:58	0
6619	99	157	25,20	cyclictest	0	-21	swapper	23:30:08	0
6619	99	157	15,100	cyclictest	5711	-21	diskstats	22:20:32	0
6619	99	156	21,109	cyclictest	8644	-21	users	22:36:07	0
6619	99	156	11,115	cyclictest	24569	-21	readlink	20:56:08	0
6619	99	155	15,39	cyclictest	20028	-21	diskstats	23:45:32	0
6619	99	154	19,96	cyclictest	15340	-21	munin-run	23:20:03	0
6619	99	154	15,23	cyclictest	15335	-21	apt-get	23:21:27	0
6619	99	154	14,118	cyclictest	7425	-21	munin-node	19:15:08	0
6619	99	154	12,117	cyclictest	27147	-21	unixbench_singl	21:11:03	0
6619	99	153	9,99	cyclictest	28299	-21	grep	00:35:04	0
6619	99	153	8,121	cyclictest	14116	-21	grep	23:10:53	0
6619	99	153	17,113	cyclictest	19439	-21	diskstats	20:25:32	0
6619	99	153	13,24	cyclictest	21712	-21	sshd	23:55:33	0
6619	99	152	80,31	cyclictest	15885	-21	apt-get	20:05:14	0
6619	99	152	19,109	cyclictest	4882	-21	diskstats	22:15:31	0
6619	99	152	15,25	cyclictest	19005	-21	munin-run	23:40:02	0
6619	99	152	14,23	cyclictest	17176	-21	apt-get	23:30:42	0
6619	99	152	14,115	cyclictest	10509	-21	diskstats	22:50:32	0
6619	99	152	11,28	cyclictest	29050	-21	apt	00:40:00	0
6619	99	152	11,117	cyclictest	11426	-21	ps	19:35:54	0
6619	99	151	9,119	cyclictest	9515	-21	cat	22:45:03	0
6619	99	151	9,118	cyclictest	10113	-21	sed	19:26:07	0
6619	99	151	19,104	cyclictest	8681	-21	apt-get	19:20:19	0
6619	99	151	15,23	cyclictest	21407	-21	munin-run	23:55:01	0
6619	99	151	14,21	cyclictest	16577	-21	apt-get	20:11:04	0
6619	99	151	13,116	cyclictest	25124	-21	irqstats	21:00:41	0
6619	99	151	12,24	cyclictest	24960	-21	sed	00:11:01	0
6619	99	151	11,36	cyclictest	23902	-21	/usr/sbin/munin	00:06:01	0
6619	99	151	10,116	cyclictest	32192	-21	wc	21:45:05	0
6619	99	150	16,25	cyclictest	11891	-21	apt-get	23:00:46	0
6619	99	150	15,113	cyclictest	19233	-21	diskstats	23:40:33	0
6619	99	150	14,36	cyclictest	22648	-21	diskstats	20:45:32	0
6619	99	150	13,38	cyclictest	2047	-21	munin-run	22:00:03	0
6619	99	150	13,26	cyclictest	7473	-21	latency_hist	19:15:05	0
6619	99	150	13,115	cyclictest	4054	-21	ls	22:10:25	0
6619	99	149	43,86	cyclictest	26072	-21	open_files	21:05:58	0
6619	99	149	18,105	cyclictest	9849	-21	memory	22:45:46	0
6619	99	149	14,24	cyclictest	12495	-21	grep	19:41:05	0
6619	99	149	14,111	cyclictest	27442	-21	diskstats	21:15:32	0
6619	99	149	12,113	cyclictest	14913	-21	grep	19:56:06	0
6619	99	148	36,90	cyclictest	22115	-21	processes	20:40:56	0
6619	99	148	28,20	cyclictest	0	-21	swapper	20:03:31	0
6619	99	148	19,103	cyclictest	28164	-21	apt-get	21:20:19	0
6619	99	148	15,109	cyclictest	23988	-21	users	20:51:06	0
6619	99	148	14,27	cyclictest	13469	-21	/usr/sbin/munin	19:51:02	0
6619	99	148	14,22	cyclictest	17706	-21	apt-get	20:15:32	0
6619	99	148	13,113	cyclictest	29587	-21	grep	21:26:03	0
6619	99	148	12,24	cyclictest	25856	-21	systemctl	00:20:02	0
6619	99	147	34,17	cyclictest	0	-21	swapper	20:25:05	0
6619	99	147	32,20	cyclictest	0	-21	swapper	19:31:04	0
6619	99	147	21,101	cyclictest	3189	-21	apt-get	22:05:27	0
6619	99	147	18,25	cyclictest	30409	-21	users	21:31:17	0
6619	99	147	10,113	cyclictest	21331	-21	zcat	20:35:55	0
6619	99	146	15,22	cyclictest	25975	-21	apt-get	00:20:14	0
6619	99	146	11,28	cyclictest	13089	-21	cpu	23:05:31	0
6619	99	144	10,30	cyclictest	12974	-21	/usr/sbin/munin	19:45:48	0
6619	99	144	10,112	cyclictest	32629	-21	grep	21:45:56	0
6619	99	143	18,24	cyclictest	20230	-21	df_inode	20:30:32	0
6619	99	142	12,106	cyclictest	547	-21	/usr/sbin/munin	21:50:23	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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