OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 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 100 highest latencies:

System rackeslot5s.osadl.org (updated Wed Dec 10, 2025 00:44:25)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
16363	99	26	22,4	cyclictest	0	-21	swapper/1	23:48:43	1
16365	99	25	23,1	cyclictest	28362	-21	latency_hist	19:35:00	3
16363	99	25	0,24	cyclictest	11229	-21	apt-get	23:28:45	1
16364	99	24	0,1	cyclictest	0	-21	swapper/2	23:48:43	2
16363	99	24	22,1	cyclictest	0	-21	swapper/1	20:05:00	1
16363	99	24	21,2	cyclictest	9666	-21	awk	21:10:00	1
16363	99	24	20,3	cyclictest	28903	-21	apt-get	19:38:44	1
16363	99	24	0,23	cyclictest	7218	-21	awk	00:25:00	1
16363	99	24	0,1	cyclictest	27257	-21	perf	20:40:00	1
16363	99	24	0,1	cyclictest	11949	-21	apt-get	22:23:43	1
16363	99	24	0,1	cyclictest	11949	-21	apt-get	22:23:43	1
16362	99	24	0,24	cyclictest	0	-21	swapper/0	00:18:43	0
16365	99	23	23,0	cyclictest	13362	-21	apt-get	20:13:40	3
16365	99	23	0,22	cyclictest	21141	-21	apt	19:20:01	3
16364	99	23	21,1	cyclictest	598	-21	rs:main		2
16364	99	23	0,22	cyclictest	30779	-21	munin-run	19:40:00	2
16364	99	23	0,0	cyclictest	0	-21	swapper/2	22:23:43	2
16364	99	23	0,0	cyclictest	0	-21	swapper/2	22:23:42	2
16363	99	23	21,1	cyclictest	30635	-21	munin-run	23:00:00	1
16363	99	23	21,1	cyclictest	20319	-21	munin-plugin-st	23:45:00	1
16363	99	23	0,1	cyclictest	28209	-21	latency_hist	22:55:00	1
16363	99	23	0,1	cyclictest	16937	-21	ls	21:25:00	1
16362	99	23	23,0	cyclictest	0	-21	swapper/0	20:03:40	0
16362	99	23	21,1	cyclictest	0	-21	swapper/0	19:45:00	0
16362	99	23	0,2	cyclictest	30599	-21	cron	23:00:00	0
16362	99	23	0,22	cyclictest	563	-21	apt	23:04:59	0
16362	99	23	0,22	cyclictest	0	-21	swapper/0	00:30:00	0
16365	99	22	22,0	cyclictest	0	-21	swapper/3	21:08:41	3
16365	99	22	20,1	cyclictest	3703	-21	apt-get	19:53:41	3
16365	99	22	20,1	cyclictest	27483	-40	mandb	00:00:00	3
16365	99	22	20,1	cyclictest	27483	-40	mandb	00:00:00	3
16365	99	22	20,1	cyclictest	21019	-21	perf	22:40:01	3
16365	99	22	20,1	cyclictest	16023	-21	apt-get	23:38:43	3
16365	99	22	20,1	cyclictest	13091	-21	awk	23:30:01	3
16365	99	22	20,1	cyclictest	12835	-21	idleruntime-cro	20:10:01	3
16365	99	22	20,1	cyclictest	11405	-21	perf	22:20:00	3
16365	99	22	0,21	cyclictest	0	-21	swapper/3	22:28:43	3
16365	99	22	0,21	cyclictest	0	-21	swapper/3	21:48:43	3
16365	99	22	0,21	cyclictest	0	-21	swapper/3	21:18:44	3
16364	99	22	22,0	cyclictest	7078	-21	apt-get	22:13:41	2
16364	99	22	22,0	cyclictest	0	-21	swapper/2	19:48:43	2
16364	99	22	20,1	cyclictest	3958	-21	apt-get	23:13:42	2
16364	99	22	20,1	cyclictest	3958	-21	apt-get	23:13:42	2
16364	99	22	20,1	cyclictest	23416	-21	grep	22:45:00	2
16364	99	22	20,1	cyclictest	16943	-21	perf	21:24:59	2
16364	99	22	19,2	cyclictest	11992	-21	wc	00:35:00	2
16364	99	22	0,21	cyclictest	25085	-21	apt-get	21:43:44	2
16364	99	22	0,21	cyclictest	1705	-21	sh	22:00:00	2
16364	99	22	0,21	cyclictest	0	-21	swapper/2	23:23:41	2
16364	99	22	0,21	cyclictest	0	-21	swapper/2	23:05:02	2
16364	99	22	0,21	cyclictest	0	-21	swapper/2	19:53:42	2
16364	99	22	0,21	cyclictest	0	-21	swapper/2	00:13:43	2
16364	99	22	0,1	cyclictest	22990	-21	apt-get	20:33:44	2
16363	99	22	20,1	cyclictest	15464	-21	awk	23:35:00	1
16363	99	22	17,4	cyclictest	19319	-21	turbostat.cron	21:30:00	1
16363	99	22	1,1	cyclictest	14504	-21	cron	21:20:00	1
16363	99	22	0,21	cyclictest	8776	-21	apt-get	23:23:42	1
16363	99	22	0,21	cyclictest	0	-21	swapper/1	20:58:44	1
16363	99	22	0,21	cyclictest	0	-21	swapper/1	00:18:43	1
16362	99	22	22,0	cyclictest	20849	-21	apt-get	23:48:43	0
16362	99	22	22,0	cyclictest	0	-21	swapper/0	21:23:45	0
16362	99	22	20,1	cyclictest	23429	-21	munin-run	22:45:00	0
16362	99	22	19,2	cyclictest	18594	-21	awk	22:35:00	0
16362	99	22	0,21	cyclictest	28150	-21	apt-get	00:03:43	0
16362	99	22	0,21	cyclictest	14409	-21	perf	00:39:59	0
16362	99	22	0,21	cyclictest	1294	-21	apt-get	19:48:43	0
16362	99	22	0,21	cyclictest	0	-21	swapper/0	21:58:45	0
16362	99	22	0,21	cyclictest	0	-21	swapper/0	21:03:41	0
16362	99	22	0,1	cyclictest	612	-21	gdbus	20:15:01	0
16365	99	21	21,0	cyclictest	0	-21	swapper/3	21:23:45	3
16365	99	21	21,0	cyclictest	0	-21	swapper/3	20:28:41	3
16365	99	21	20,1	cyclictest	25385	-21	apt-get	20:38:43	3
16365	99	21	19,1	cyclictest	0	-21	swapper/3	22:50:00	3
16365	99	21	19,1	cyclictest	0	-21	swapper/3	21:40:02	3
16365	99	21	0,21	cyclictest	0	-21	swapper/3	23:33:42	3
16365	99	21	0,20	cyclictest	0	-21	swapper/3	22:33:43	3
16365	99	21	0,20	cyclictest	0	-21	swapper/3	22:03:42	3
16365	99	21	0,20	cyclictest	0	-21	swapper/3	20:43:45	3
16365	99	21	0,1	cyclictest	0	-21	swapper/3	21:15:00	3
16365	99	21	0,0	cyclictest	21708	-21	apt-get	19:23:42	3
16365	99	21	0,0	cyclictest	0	-21	swapper/3	19:48:43	3
16365	99	21	0,0	cyclictest	0	-21	swapper/3	00:18:43	3
16364	99	21	19,1	cyclictest	31701	-21	cron	21:55:00	2
16364	99	21	19,1	cyclictest	21116	-21	cron	19:20:01	2
16364	99	21	19,1	cyclictest	0	-21	swapper/2	00:00:00	2
16364	99	21	19,1	cyclictest	0	-21	swapper/2	00:00:00	2
16364	99	21	0,20	cyclictest	0	-21	swapper/2	00:28:46	2
16364	99	21	0,1	cyclictest	32396	-21	latency_hist	00:10:00	2
16364	99	21	0,1	cyclictest	26364	-21	apt-get	22:53:43	2
16363	99	21	20,0	cyclictest	0	-21	swapper/1	23:08:45	1
16363	99	21	20,0	cyclictest	0	-21	swapper/1	22:03:42	1
16363	99	21	19,1	cyclictest	0	-21	swapper/1	20:18:42	1
16363	99	21	0,20	cyclictest	0	-21	swapper/1	19:43:41	1
16363	99	21	0,1	cyclictest	13362	-21	apt-get	20:13:40	1
16363	99	21	0,0	cyclictest	4686	-21	apt-get	22:08:42	1
16363	99	21	0,0	cyclictest	0	-21	swapper/1	21:13:43	1
16363	99	21	0,0	cyclictest	0	-21	swapper/1	20:48:46	1
16363	99	21	0,0	cyclictest	0	-21	swapper/1	20:23:41	1
16362	99	21	21,0	cyclictest	0	-21	swapper/0	19:23:43	0
16362	99	21	19,1	cyclictest	0	-21	swapper/0	21:35:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2020-09-17 - 11:29