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 Fri Jan 02, 2026 12:45:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
24143	2	2407	2180,85	sleep0	0	-21	swapper	07:06:55	0
24534	99	158	21,27	cyclictest	3172	-21	apt-get	08:15:26	0
24534	99	157	18,23	cyclictest	2365	-21	munin-run	11:30:01	0
24534	99	157	15,118	cyclictest	26712	-21	apt-get	10:40:31	0
24534	99	157	13,118	cyclictest	21521	-21	apt-get	10:11:24	0
24534	99	156	20,107	cyclictest	28508	-21	apt-get	10:50:18	0
24534	99	156	18,112	cyclictest	1416	-21	apt-get	08:05:23	0
24534	99	156	13,101	cyclictest	26390	-21	wc	10:36:00	0
24534	99	155	15,115	cyclictest	25484	-21	/usr/sbin/munin	10:30:55	0
24534	99	155	12,118	cyclictest	30706	-21	df_inode	07:45:32	0
24534	99	155	12,117	cyclictest	3031	-21	sed	11:31:01	0
24534	99	154	28,19	cyclictest	0	-21	swapper	10:45:38	0
24534	99	154	15,116	cyclictest	4437	-21	mailstats	08:20:59	0
24534	99	154	14,116	cyclictest	5737	-21	apt-get	11:50:23	0
24534	99	154	13,25	cyclictest	5571	-21	munin-run	11:50:02	0
24534	99	153	20,106	cyclictest	10073	-21	irqstats	12:15:39	0
24534	99	153	18,24	cyclictest	3961	-21	munin-run	11:40:01	0
24534	99	153	17,91	cyclictest	24870	-21	memory	07:10:45	0
24534	99	153	14,117	cyclictest	19917	-21	munin-run	10:00:02	0
24534	99	153	14,114	cyclictest	18364	-21	cat	09:50:04	0
24534	99	153	13,98	cyclictest	8587	-21	/usr/sbin/munin	12:05:45	0
24534	99	152	30,102	cyclictest	7862	-21	/usr/sbin/munin	12:00:52	0
24534	99	152	17,22	cyclictest	28286	-21	df	07:30:28	0
24534	99	152	17,107	cyclictest	13115	-21	apt-get	12:35:16	0
24534	99	152	16,22	cyclictest	6701	-21	apt-get	11:55:14	0
24534	99	152	14,25	cyclictest	31384	-21	latency_hist	07:50:05	0
24534	99	152	13,114	cyclictest	4775	-21	munin-plugin-st	11:45:01	0
24534	99	152	11,23	cyclictest	21558	-21	latency_hist	10:10:05	0
24534	99	152	11,118	cyclictest	22750	-21	df	10:15:35	0
24534	99	152	11,114	cyclictest	12620	-21	grep	09:11:05	0
24534	99	152	10,101	cyclictest	17259	-21	fgrep	09:40:55	0
24534	99	151	9,119	cyclictest	1249	-21	munin-plugin-st	08:05:00	0
24534	99	151	45,86	cyclictest	16468	-21	mailstats	09:35:57	0
24534	99	151	10,118	cyclictest	1488	-21	sed	11:21:01	0
24534	99	150	17,25	cyclictest	4793	-21	/usr/sbin/munin	08:25:46	0
24534	99	150	13,115	cyclictest	29680	-21	systemctl	07:40:02	0
24534	99	150	13,114	cyclictest	14296	-21	awk	09:21:07	0
24534	99	150	12,23	cyclictest	11453	-21	cat	12:25:03	0
24534	99	149	16,26	cyclictest	23478	-21	/usr/sbin/munin	10:20:21	0
24534	99	149	14,112	cyclictest	12942	-21	grep	12:31:02	0
24534	99	149	13,96	cyclictest	27142	-21	sort	07:21:01	0
24534	99	149	12,22	cyclictest	5951	-21	wc	08:30:53	0
24534	99	149	12,114	cyclictest	25016	-21	cat	10:30:04	0
24534	99	148	16,106	cyclictest	25339	-21	munin-node	07:15:10	0
24534	99	148	16,106	cyclictest	10412	-21	apt-get	09:00:17	0
24534	99	148	15,110	cyclictest	31086	-21	irqstats	11:05:38	0
24534	99	148	15,110	cyclictest	28084	-21	munin-run	07:30:01	0
24534	99	148	13,26	cyclictest	10298	-21	sendmail	09:00:03	0
24534	99	148	13,113	cyclictest	32683	-21	uname	11:15:43	0
24534	99	148	13,112	cyclictest	7730	-21	sort	08:40:58	0
24534	99	148	13,111	cyclictest	9725	-21	unixbench_singl	12:11:04	0
24534	99	148	11,25	cyclictest	30561	-21	sort	07:45:06	0
24534	99	148	10,27	cyclictest	6589	-21	grep	08:35:39	0
24534	99	147	23,33	cyclictest	0	-21	swapper	12:25:45	0
24534	99	147	18,25	cyclictest	13509	-21	munin-run	09:20:03	0
24534	99	147	18,104	cyclictest	11379	-21	irqstats	09:05:38	0
24534	99	147	17,104	cyclictest	20037	-21	apt-get	10:00:17	0
24534	99	147	14,25	cyclictest	29398	-21	df	10:55:24	0
24534	99	147	13,109	cyclictest	30233	-21	diskstats	11:00:32	0
24534	99	146	18,103	cyclictest	8945	-21	if_eth0	08:50:37	0
24534	99	146	13,30	cyclictest	18529	-21	/usr/sbin/munin	09:50:29	0
24534	99	146	13,110	cyclictest	14425	-21	apt-get	09:25:20	0
24534	99	145	13,21	cyclictest	3070	-21	munin-run	08:15:00	0
24534	99	145	10,112	cyclictest	32396	-21	modprobe	11:15:00	0
24534	99	144	19,25	cyclictest	32191	-21	apt-get	07:55:20	0
24534	99	143	17,26	cyclictest	15323	-21	df_inode	09:30:29	0
24534	99	143	10,28	cyclictest	7996	-21	/usr/sbin/munin	08:45:40	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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