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 Wed Jun 10, 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
24461	2	2428	2185,98	sleep0	0	-21	swapper	07:09:01	0
24616	99	164	18,118	cyclictest	24798	-21	apt-get	10:30:19	0
24616	99	161	19,116	cyclictest	11324	-21	apt-get	09:12:01	0
24616	99	161	17,116	cyclictest	27209	-21	apt-get	10:45:18	0
24616	99	157	39,23	cyclictest	3146	-21	latency_hist	08:20:06	0
24616	99	157	16,25	cyclictest	8911	-21	apt	08:55:02	0
24616	99	157	15,117	cyclictest	5473	-21	apt-get	08:36:37	0
24616	99	157	14,21	cyclictest	25880	-21	awk	10:35:46	0
24616	99	156	28,105	cyclictest	30903	-21	expr	07:50:23	0
24616	99	156	17,114	cyclictest	2667	-21	apt-get	11:36:59	0
24616	99	156	14,119	cyclictest	30126	-21	diskstats	07:45:35	0
24616	99	155	19,30	cyclictest	16886	-21	diskstats	09:40:33	0
24616	99	155	19,25	cyclictest	6908	-21	apt-get	12:01:26	0
24616	99	155	13,117	cyclictest	15711	-21	apt-get	09:35:25	0
24616	99	154	12,114	cyclictest	11737	-21	cut	12:25:55	0
24616	99	154	11,118	cyclictest	4460	-21	grep	11:41:14	0
24616	99	154	10,102	cyclictest	25447	-21	grep	07:15:07	0
24616	99	153	28,21	cyclictest	21328	-21	grep	10:06:02	0
24616	99	153	14,23	cyclictest	4729	-21	/usr/sbin/munin	11:45:35	0
24616	99	153	14,117	cyclictest	25713	-21	sort	07:15:24	0
24616	99	153	13,118	cyclictest	29179	-21	latency_hist	07:40:06	0
24616	99	153	11,29	cyclictest	31905	-21	munin-plugin-st	11:15:01	0
24616	99	152	21,103	cyclictest	14196	-21	diskstats	09:25:32	0
24616	99	152	19,105	cyclictest	4779	-21	apt-get	08:30:15	0
24616	99	152	18,22	cyclictest	1290	-21	diskstats	11:25:32	0
24616	99	152	17,109	cyclictest	1974	-21	apt-get	11:30:18	0
24616	99	152	13,115	cyclictest	2255	-21	munin-plugin-st	08:15:02	0
24616	99	152	12,39	cyclictest	27452	-21	unixbench_singl	07:26:03	0
24616	99	152	11,25	cyclictest	6505	-21	awk	11:55:50	0
24616	99	151	25,16	cyclictest	0	-21	swapper	10:45:01	0
24616	99	151	24,21	cyclictest	0	-21	swapper	08:58:39	0
24616	99	151	12,116	cyclictest	23040	-21	awk	10:16:05	0
24616	99	150	9,100	cyclictest	7056	-21	wc	08:41:02	0
24616	99	150	32,21	cyclictest	10363	-21	munin-run	12:20:02	0
24616	99	150	28,22	cyclictest	0	-21	swapper	12:05:51	0
24616	99	150	19,25	cyclictest	18474	-21	diskstats	09:50:30	0
24616	99	150	18,105	cyclictest	29117	-21	ntp_states	10:55:51	0
24616	99	150	16,24	cyclictest	24174	-21	irqstats	10:25:37	0
24616	99	150	14,98	cyclictest	28115	-21	diskstats	10:50:31	0
24616	99	150	14,35	cyclictest	28295	-21	apt	07:35:01	0
24616	99	150	13,113	cyclictest	4285	-21	tr	08:25:48	0
24616	99	150	12,116	cyclictest	875	-21	diskstats	08:05:34	0
24616	99	150	12,115	cyclictest	32564	-21	if_err_eth0	08:00:34	0
24616	99	149	28,21	cyclictest	0	-21	swapper	11:50:56	0
24616	99	149	21,101	cyclictest	384	-21	apt-get	11:20:20	0
24616	99	149	18,26	cyclictest	12458	-21	apt-get	09:15:23	0
24616	99	149	14,20	cyclictest	19864	-21	run-parts	10:00:01	0
24616	99	149	14,111	cyclictest	26707	-21	munin-run	07:25:02	0
24616	99	149	13,23	cyclictest	29361	-21	if_eth0	07:40:35	0
24616	99	149	12,26	cyclictest	13962	-21	sshd	09:22:35	0
24616	99	149	12,114	cyclictest	10768	-21	awk	12:20:46	0
24616	99	148	19,37	cyclictest	32722	-21	munin-run	11:20:03	0
24616	99	148	15,27	cyclictest	12979	-21	diskstats	12:35:31	0
24616	99	148	15,107	cyclictest	29622	-21	apt-get	11:00:17	0
24616	99	148	11,113	cyclictest	12490	-21	zcat	12:30:56	0
24616	99	147	13,25	cyclictest	31711	-21	df_inode	07:55:29	0
24616	99	147	12,25	cyclictest	18263	-21	latency_hist	09:50:01	0
24616	99	147	12,107	cyclictest	19982	-21	/usr/sbin/munin	10:00:36	0
24616	99	147	10,26	cyclictest	14877	-21	/usr/sbin/munin	09:30:45	0
24616	99	146	15,107	cyclictest	7849	-21	wc	08:45:55	0
24616	99	146	13,95	cyclictest	9465	-21	grep	12:11:04	0
24616	99	146	12,50	cyclictest	21777	-21	cut	10:10:39	0
24616	99	146	12,38	cyclictest	3710	-21	switchtime	08:20:59	0
24616	99	145	14,107	cyclictest	10629	-21	/usr/sbin/munin	09:05:10	0
24616	99	144	19,99	cyclictest	30525	-21	diskstats	11:05:31	0
24616	99	144	17,24	cyclictest	23311	-21	df_inode	10:20:29	0
24616	99	142	17,99	cyclictest	9938	-21	df_inode	09:00:27	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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