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 Dec 11, 2025 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2244908	99	63	52,9	cyclictest	2698871	-21	systemd-journal	19:55:00	3
2244908	99	63	52,9	cyclictest	2698871	-21	systemd-journal	19:55:00	3
2244898	99	39	34,2	cyclictest	1	-21	systemd	20:20:01	0
2244900	99	38	30,5	cyclictest	2468182	-21	latency_hist	22:45:00	1
2244904	99	37	33,3	cyclictest	2255210	-21	kworker/u8:0+events_unbound	19:55:21	2
2244904	99	36	32,3	cyclictest	2322601	-21	kworker/u8:1+events_unbound	21:10:15	2
2244904	99	36	30,4	cyclictest	2698871	-21	systemd-journal	21:05:23	2
2244904	99	34	30,2	cyclictest	2530478	-21	kworker/u8:1+flush-259:0	23:50:00	2
2244904	99	34	26,3	cyclictest	2452740	-21	kworker/u8:1+events_unbound	23:05:18	2
2244904	99	33	30,2	cyclictest	2400323	-21	kworker/u8:2+flush-259:0	21:55:00	2
2244904	99	33	30,2	cyclictest	2317117	-21	kworker/u8:3+flush-259:0	22:05:00	2
2244904	99	33	30,2	cyclictest	2317117	-21	kworker/u8:3+events_unbound	20:20:13	2
2244898	99	33	26,5	cyclictest	2535560	-21	latency_hist	23:50:00	0
2244908	99	32	26,4	cyclictest	2698871	-21	systemd-journal	19:40:00	3
2244908	99	32	26,4	cyclictest	2572479	-21	latency_hist	00:25:00	3
2244904	99	32	28,3	cyclictest	2332858	-21	kworker/u8:2+flush-259:0	20:55:00	2
2244898	99	32	28,3	cyclictest	2332858	-21	kworker/u8:2+flush-259:0	20:45:00	0
2244904	99	31	28,2	cyclictest	2494215	-21	kworker/u8:3+flush-259:0	23:10:19	2
2244904	99	31	28,2	cyclictest	2494215	-21	kworker/u8:3+events_unbound	23:20:17	2
2244900	99	31	25,4	cyclictest	2546276	-21	latency_hist	00:00:01	1
2244900	99	31	24,5	cyclictest	2519930	-21	cat	23:35:01	1
2244904	99	30	27,2	cyclictest	2214158	-21	kworker/u8:2+flush-259:0	19:25:20	2
2244904	99	29	26,2	cyclictest	2296824	-21	kworker/u8:2+events_unbound	20:10:01	2
2244904	99	29	25,3	cyclictest	2416637	-21	kworker/u8:1+flush-259:0	22:15:15	2
2244900	99	29	23,4	cyclictest	2400546	-21	/usr/sbin/munin	21:40:16	1
2244904	99	28	25,2	cyclictest	2264888	-21	kworker/u8:3+events_unbound	19:45:00	2
2244904	99	28	24,2	cyclictest	2400323	-21	kworker/u8:2+flush-259:0	21:40:23	2
2244900	99	28	23,3	cyclictest	2343445	-21	apt-get	20:45:13	1
2244900	99	28	21,5	cyclictest	2389626	-21	latency_hist	21:30:01	1
2244898	99	28	24,3	cyclictest	2427211	-21	apt-get	22:05:13	0
2244908	99	27	14,5	cyclictest	2426951	-21	latency_hist	22:05:00	3
2244904	99	27	23,3	cyclictest	2494214	-21	kworker/u8:0+events_unbound	23:35:21	2
2244904	99	27	22,3	cyclictest	2473576	-21	kworker/u8:3+events_unbound	22:50:23	2
2244900	99	27	24,2	cyclictest	2317117	-21	kworker/u8:3+flush-259:0	21:00:00	1
2244898	99	27	24,2	cyclictest	2394885	-21	kworker/u8:1+events_unbound	21:35:26	0
2244908	99	26	20,4	cyclictest	2411073	-21	apt-get	21:50:00	3
2244908	99	26	19,5	cyclictest	2509436	-21	latency_hist	23:25:02	3
2244904	99	26	23,2	cyclictest	2494215	-21	kworker/u8:3+events_unbound	23:25:25	2
2244898	99	26	22,3	cyclictest	2458086	-21	kworker/u8:2+events_unbound	23:10:02	0
2244898	99	26	22,3	cyclictest	2383982	-21	kworker/u8:2+flush-259:0	21:24:59	0
2244898	99	26	19,5	cyclictest	2379343	-21	latency_hist	21:20:00	0
2244908	99	25	20,3	cyclictest	2573161	-21	apt-get	00:25:13	3
2244904	99	25	22,2	cyclictest	2426964	-21	kworker/u8:0+events_unbound	22:35:14	2
2244904	99	25	22,2	cyclictest	2394885	-21	kworker/u8:1+events_unbound	21:35:19	2
2244904	99	25	21,3	cyclictest	2214158	-21	kworker/u8:2+flush-259:0	19:10:25	2
2244908	99	24	19,4	cyclictest	2494214	-21	kworker/u8:0+flush-259:0	23:44:59	3
2244908	99	24	17,5	cyclictest	2316519	-21	ntpq	20:15:21	3
2244904	99	24	21,2	cyclictest	2583429	-21	kworker/u8:4+events_unbound	00:38:49	2
2244904	99	24	21,2	cyclictest	2509658	-21	kworker/u8:4+flush-259:0	23:30:24	2
2244904	99	24	21,2	cyclictest	2255210	-21	kworker/u8:0+flush-259:0	19:50:20	2
2244904	99	24	21,2	cyclictest	2255210	-21	kworker/u8:0+flush-259:0	19:50:20	2
2244904	99	24	19,4	cyclictest	2426964	-21	kworker/u8:0+events_unbound	22:45:25	2
2244900	99	24	19,4	cyclictest	2358955	-21	/usr/sbin/munin	21:00:23	1
2244900	99	24	19,3	cyclictest	2494214	-21	kworker/u8:0+flush-259:0	23:35:16	1
2244898	99	24	21,2	cyclictest	2264888	-21	kworker/u8:3+events_unbound	19:40:18	0
2244898	99	24	20,3	cyclictest	2432321	-21	kworker/u8:4+events_unbound	22:10:23	0
2244898	99	24	20,3	cyclictest	2383982	-21	kworker/u8:2+events_unbound	21:25:16	0
2244898	99	24	17,5	cyclictest	2244838	-21	latency_hist	19:10:00	0
2244908	99	23	17,4	cyclictest	2357842	-21	ntpq	20:55:24	3
2244904	99	23	20,2	cyclictest	2567353	-21	kworker/u8:2+events_unbound	00:25:16	2
2244904	99	23	20,2	cyclictest	2494214	-21	kworker/u8:0+events_unbound	00:10:13	2
2244904	99	23	20,2	cyclictest	2478739	-21	kworker/u8:4+events_unbound	22:55:25	2
2244904	99	23	20,2	cyclictest	2255210	-21	kworker/u8:0+flush-259:0	19:35:18	2
2244904	99	23	19,3	cyclictest	2494214	-21	kworker/u8:0+events_unbound	23:15:15	2
2244904	99	23	19,3	cyclictest	2432321	-21	kworker/u8:4+events_unbound	22:20:13	2
2244898	99	23	20,2	cyclictest	2416637	-21	kworker/u8:1+events_unbound	21:55:01	0
2244898	99	23	20,2	cyclictest	2317117	-21	kworker/u8:3+flush-259:0	20:45:21	0
2244904	99	22	20,2	cyclictest	2322601	-21	kworker/u8:1+flush-259:0	20:30:21	2
2244904	99	22	19,2	cyclictest	2416637	-21	kworker/u8:1+events_unbound	22:10:25	2
2244904	99	22	17,4	cyclictest	2463259	-21	apt-get	22:40:10	2
2244898	99	22	19,2	cyclictest	2264888	-21	kworker/u8:3+events_unbound	20:00:25	0
2244898	99	22	19,2	cyclictest	2264888	-21	kworker/u8:3+events_unbound	19:25:25	0
2244898	99	22	18,3	cyclictest	2214158	-21	kworker/u8:2+events_unbound	19:30:16	0
2244904	99	21	18,2	cyclictest	2317117	-21	kworker/u8:3+events_unbound	21:30:26	2
2244900	99	21	17,3	cyclictest	2572469	-21	idleruntime-cro	00:25:00	1
2244900	99	21	17,2	cyclictest	2255210	-21	kworker/u8:0+flush-259:0	19:35:00	1
2244900	99	21	16,3	cyclictest	2250431	-21	diskstats	19:15:13	1
2244898	99	21	18,2	cyclictest	2494215	-21	kworker/u8:3+flush-259:0	00:15:20	0
2244898	99	21	18,2	cyclictest	2494214	-21	kworker/u8:0+events_unbound	00:10:15	0
2244898	99	21	18,2	cyclictest	2249703	-21	kworker/u8:1+flush-259:0	19:15:21	0
2244898	99	21	17,3	cyclictest	2578299	-21	apt-get	00:30:13	0
2244898	99	21	17,3	cyclictest	2494215	-21	kworker/u8:3+flush-259:0	23:55:26	0
2244898	99	21	17,3	cyclictest	2411545	-21	cp	21:50:00	0
2244908	99	20	13,6	cyclictest	2452740	-21	kworker/u8:1+flush-259:0	22:45:00	3
2244908	99	20	13,5	cyclictest	2441556	-21	ntpq	22:15:20	3
2244904	99	20	17,2	cyclictest	2452740	-21	kworker/u8:1+events_unbound	23:00:18	2
2244904	99	20	17,2	cyclictest	2317117	-21	kworker/u8:3+flush-259:0	21:55:16	2
2244904	99	20	16,3	cyclictest	3000061	-21	in:imuxsock	20:45:00	2
2244904	99	20	16,3	cyclictest	2296824	-21	kworker/u8:2+events_unbound	20:00:22	2
2244904	99	20	15,3	cyclictest	2541235	-21	base64	23:55:01	2
2244900	99	20	17,2	cyclictest	2369030	-21	turbostat.cron	21:10:00	1
2244900	99	20	16,3	cyclictest	2462993	-21	sh	22:40:01	1
2244900	99	20	14,4	cyclictest	2698871	-21	systemd-journal	20:26:21	1
2244898	99	20	16,3	cyclictest	2583429	-21	kworker/u8:4+flush-259:0	00:35:20	0
2244898	99	20	16,3	cyclictest	2432321	-21	kworker/u8:4+events_unbound	22:20:20	0
2244904	99	19	17,1	cyclictest	2432321	-21	kworker/u8:4+flush-259:0	22:25:20	2
2244904	99	19	15,3	cyclictest	2317117	-21	kworker/u8:3+flush-259:0	20:45:25	2
2244904	99	19	15,3	cyclictest	2286847	-21	kworker/u8:1+events_unbound	20:15:13	2
2244900	99	19	15,3	cyclictest	2348586	-21	apt-get	20:50:13	1
2244900	99	19	15,2	cyclictest	0	-21	swapper/1	21:55:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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