OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Thu Mar 05, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2307403	99	42	37,3	cyclictest	2397039	-21	base64	20:35:01	3
2307395	99	39	36,2	cyclictest	2624727	-21	kworker/u8:1+flush-259:0	00:15:24	1
2307403	99	35	31,3	cyclictest	2449175	-21	apt-get	21:25:11	3
2307395	99	34	31,2	cyclictest	2349320	-21	kworker/u8:2+events_unbound	19:55:19	1
2307395	99	33	30,2	cyclictest	2479860	-21	kworker/u8:3+events_unbound	22:40:23	1
2307395	99	33	30,2	cyclictest	2396743	-21	kworker/u8:2+events_unbound	20:45:19	1
2307395	99	33	29,3	cyclictest	2598979	-21	kworker/u8:2+events_unbound	00:30:20	1
2307395	99	32	29,2	cyclictest	2149756	-21	kworker/u8:0+events_unbound	19:10:13	1
2307395	99	31	28,2	cyclictest	2469573	-21	kworker/u8:1+events_unbound	22:20:21	1
2307395	99	31	27,3	cyclictest	2577976	-21	kworker/u8:1+flush-259:0	23:45:00	1
2307395	99	31	26,3	cyclictest	2417638	-21	kworker/u8:1+events_unbound	21:15:13	1
2307395	99	30	27,2	cyclictest	2546678	-21	kworker/u8:0+events_unbound	23:55:20	1
2307395	99	30	26,3	cyclictest	2500433	-21	kworker/u8:2+events_unbound	22:55:20	1
2307395	99	30	26,2	cyclictest	2443356	-21	kworker/u8:3+flush-259:0	21:30:19	1
2307403	99	29	25,3	cyclictest	2598979	-21	kworker/u8:2+flush-259:0	00:30:14	3
2307403	99	29	22,5	cyclictest	2520043	-21	ntpq	22:30:18	3
2307398	99	29	22,4	cyclictest	2375689	-21	cp	20:15:01	2
2307395	99	29	26,2	cyclictest	2443356	-21	kworker/u8:3+events_unbound	21:40:20	1
2307395	99	29	23,3	cyclictest	2307368	-21	kworker/u8:1+events_unbound	19:50:20	1
2307403	99	28	23,3	cyclictest	2505548	-21	latency_hist	22:20:00	3
2307398	99	28	22,4	cyclictest	2635047	-21	latency_hist	00:25:01	2
2307395	99	28	25,2	cyclictest	2598979	-21	kworker/u8:2+events_unbound	23:50:12	1
2307392	99	28	22,4	cyclictest	2598979	-21	kworker/u8:2+flush-259:0	00:25:01	0
2307392	99	28	22,4	cyclictest	2598979	-21	kworker/u8:2+flush-259:0	00:25:01	0
2307395	99	27	24,2	cyclictest	2546678	-21	kworker/u8:0+events_unbound	23:35:13	1
2307395	99	27	23,3	cyclictest	251476	-21	kworker/u8:3+events_unbound	19:20:10	1
2307392	99	27	20,5	cyclictest	2454496	-21	diskstats	21:30:14	0
2307398	99	26	20,4	cyclictest	2328354	-21	latency_hist	19:30:00	2
2307395	99	26	20,4	cyclictest	252	-21	systemd-journal	20:00:01	1
2307395	99	25	22,2	cyclictest	2417638	-21	kworker/u8:1+events_unbound	21:25:21	1
2307395	99	25	22,2	cyclictest	2370365	-21	kworker/u8:0+events_unbound	20:50:15	1
2307395	99	25	21,3	cyclictest	2402112	-21	kworker/u8:4+flush-259:0	21:05:24	1
2307392	99	25	22,2	cyclictest	2500433	-21	kworker/u8:2+flush-259:0	22:50:19	0
2307392	99	25	19,4	cyclictest	2318081	-21	latency_hist	19:20:00	0
2307403	99	24	17,5	cyclictest	2385287	-21	ntpq	20:20:20	3
2307395	99	24	21,2	cyclictest	2609259	-21	kworker/u8:3+events_unbound	00:40:01	1
2307395	99	24	21,2	cyclictest	2546678	-21	kworker/u8:0+events_unbound	23:25:45	1
2307395	99	24	21,2	cyclictest	2396743	-21	kworker/u8:2+events_unbound	20:35:22	1
2307395	99	24	21,2	cyclictest	2149756	-21	kworker/u8:0+events_unbound	19:15:24	1
2307395	99	24	20,3	cyclictest	2546678	-21	kworker/u8:0+flush-259:0	23:00:25	1
2307392	99	24	16,5	cyclictest	2588231	-21	latency_hist	23:40:00	0
2307403	99	23	18,3	cyclictest	2396743	-21	kworker/u8:2+flush-259:0	20:40:23	3
2307395	99	23	20,2	cyclictest	2546678	-21	kworker/u8:0+flush-259:0	23:34:55	1
2307395	99	23	20,2	cyclictest	2500433	-21	kworker/u8:2+flush-259:0	22:50:18	1
2307395	99	23	20,2	cyclictest	2479860	-21	kworker/u8:3+flush-259:0	22:45:23	1
2307395	99	23	20,2	cyclictest	2338872	-21	kworker/u8:3+flush-259:0	20:10:24	1
2307395	99	23	19,3	cyclictest	2479860	-21	kworker/u8:3+events_unbound	23:20:12	1
2307392	99	23	19,3	cyclictest	2479860	-21	kworker/u8:3+flush-259:0	22:35:20	0
2307392	99	23	16,5	cyclictest	2374583	-21	ntpq	20:10:20	0
2307398	99	22	3,10	cyclictest	2635113	-21	cat	00:25:00	2
2307398	99	22	19,2	cyclictest	2500433	-21	kworker/u8:2+events_unbound	22:25:00	2
2307398	99	22	17,4	cyclictest	2552503	-21	apt-get	23:05:13	2
2307398	99	22	17,3	cyclictest	0	-21	swapper/2	19:45:00	2
2307395	99	22	19,2	cyclictest	2459245	-21	kworker/u8:0+flush-259:0	21:55:19	1
2307395	99	22	19,2	cyclictest	2338872	-21	kworker/u8:3+events_unbound	19:45:24	1
2307403	99	21	17,3	cyclictest	2598979	-21	kworker/u8:2+flush-259:0	23:55:23	3
2307403	99	21	17,3	cyclictest	252	-21	systemd-journal	20:50:00	3
2307398	99	21	4,8	cyclictest	2454083	-21	basename	21:29:59	2
2307398	99	21	15,4	cyclictest	2396743	-21	kworker/u8:2+flush-259:0	21:00:13	2
2307395	99	21	18,2	cyclictest	2598979	-21	kworker/u8:2+flush-259:0	00:25:23	1
2307395	99	21	18,2	cyclictest	2546678	-21	kworker/u8:0+events_unbound	23:05:15	1
2307395	99	21	18,2	cyclictest	2370365	-21	kworker/u8:0+events_unbound	20:15:19	1
2307395	99	21	18,2	cyclictest	2349320	-21	kworker/u8:2+flush-259:0	20:20:19	1
2307395	99	21	17,3	cyclictest	2459245	-21	kworker/u8:0+events_unbound	21:50:21	1
2307395	99	21	17,3	cyclictest	2443356	-21	kworker/u8:3+events_unbound	21:35:20	1
2307395	99	21	15,4	cyclictest	2489254	-21	ntpq	22:00:19	1
2307392	99	21	17,3	cyclictest	2546678	-21	kworker/u8:0+flush-259:0	23:15:27	0
2307392	99	21	17,3	cyclictest	2149756	-21	kworker/u8:0+flush-259:0	19:15:00	0
2307392	99	21	14,5	cyclictest	2479860	-21	kworker/u8:3+flush-259:0	23:49:59	0
2307403	99	20	16,3	cyclictest	252	-21	systemd-journal	23:00:38	3
2307403	99	20	14,4	cyclictest	2562538	-21	latency_hist	23:15:01	3
2307398	99	20	4,4	cyclictest	2358779	-21	ntpq	19:55:20	2
2307398	99	20	16,2	cyclictest	2546674	-21	idleruntime-cro	23:00:00	2
2307398	99	20	14,4	cyclictest	2443356	-21	kworker/u8:3+flush-259:0	21:40:15	2
2307395	99	20	18,1	cyclictest	2500433	-21	kworker/u8:2+events_unbound	22:25:18	1
2307395	99	20	17,2	cyclictest	2598979	-21	kworker/u8:2+events_unbound	00:05:19	1
2307395	99	20	17,2	cyclictest	2479860	-21	kworker/u8:3+flush-259:0	22:10:22	1
2307392	99	20	16,2	cyclictest	2510951	-21	apt-get	22:25:11	0
2307392	99	20	13,5	cyclictest	2509834	-21	ntpq	22:20:21	0
2307392	99	20	13,4	cyclictest	2473844	-21	ntpq	21:45:22	0
2307403	99	19	15,3	cyclictest	2546678	-21	kworker/u8:0+flush-259:0	23:35:24	3
2307398	99	19	3,5	cyclictest	2540651	-21	ntpq	22:50:20	2
2307398	99	19	13,4	cyclictest	252	-21	systemd-journal	23:20:44	2
2307398	99	19	12,5	cyclictest	2328601	-21	/usr/sbin/munin	19:30:13	2
2307395	99	19	16,2	cyclictest	252	-21	systemd-journal	22:40:01	1
2307395	99	19	16,2	cyclictest	2479860	-21	kworker/u8:3+flush-259:0	23:15:22	1
2307395	99	19	15,3	cyclictest	2577976	-21	kworker/u8:1+flush-259:0	23:45:19	1
2307395	99	19	15,3	cyclictest	2402112	-21	kworker/u8:4+events_unbound	21:03:33	1
2307395	99	19	14,2	cyclictest	2396743	-21	kworker/u8:2+events_unbound	20:40:22	1
2307395	99	19	14,2	cyclictest	2338872	-21	kworker/u8:3+events_unbound	20:30:13	1
2307395	99	19	13,4	cyclictest	2307314	-21	latency_hist	19:09:59	1
2307392	99	19	16,2	cyclictest	1	-21	systemd	00:00:34	0
2307398	99	18	5,7	cyclictest	2598084	-21	ntpq	23:45:21	2
2307398	99	18	4,3	cyclictest	2629065	-21	ntpq	00:15:22	2
2307398	99	18	15,2	cyclictest	2323247	-21	turbostat.cron	19:25:00	2
2307395	99	18	15,2	cyclictest	2469573	-21	kworker/u8:1+flush-259:0	22:05:25	1
2307395	99	18	14,3	cyclictest	2307368	-21	kworker/u8:1+flush-259:0	19:35:05	1
2307395	99	18	13,3	cyclictest	2609476	-21	/usr/sbin/munin	00:00:23	1
2307392	99	18	14,3	cyclictest	2546678	-21	kworker/u8:0+flush-259:0	23:25:21	0
2307392	99	18	13,3	cyclictest	2591213	-21	ps	23:40:17	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34