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 Wed Jan 28, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
110590	99	53	49,3	cyclictest	303084	-21	kworker/u8:2+flush-259:0	23:10:25	2
110590	99	50	46,2	cyclictest	62529	-21	kworker/u8:0+events_unbound	20:55:22	2
110584	99	49	46,2	cyclictest	308024	-21	apt-get	22:20:00	0
110594	99	47	43,3	cyclictest	246483	-21	/usr/sbin/munin	21:20:23	3
110594	99	46	41,3	cyclictest	355492	-21	/usr/sbin/munin	23:05:14	3
110590	99	45	40,3	cyclictest	422753	-21	kworker/u8:3+flush-259:0	00:15:18	2
110594	99	44	40,3	cyclictest	303084	-21	kworker/u8:2+flush-259:0	22:40:15	3
110584	99	44	30,12	cyclictest	121114	-21	/usr/sbin/munin	19:20:13	0
110594	99	41	34,5	cyclictest	323452	-21	ntpq	22:30:22	3
110590	99	41	37,3	cyclictest	214530	-21	kworker/u8:2+flush-259:0	21:20:00	2
110594	99	40	34,4	cyclictest	448492	-21	latency_hist	00:35:00	3
110590	99	40	35,3	cyclictest	261684	-21	kworker/u8:0+flush-259:0	22:35:21	2
110587	99	40	35,3	cyclictest	252	-21	systemd-journal	21:40:00	1
110584	99	40	35,4	cyclictest	229052	-21	ntpq	21:00:21	0
110594	99	39	33,4	cyclictest	350352	-21	/usr/sbin/munin	23:00:15	3
110594	99	38	32,4	cyclictest	136619	-21	/usr/sbin/munin	19:35:13	3
110590	99	38	33,3	cyclictest	406863	-21	kworker/u8:1+events_unbound	00:35:15	2
110590	99	38	32,2	cyclictest	261684	-21	kworker/u8:0+events_unbound	22:20:15	2
110584	99	38	32,4	cyclictest	365959	-21	diskstats	23:15:15	0
110594	99	37	32,3	cyclictest	62529	-21	kworker/u8:0+flush-259:0	19:55:16	3
110590	99	37	34,2	cyclictest	303084	-21	kworker/u8:2+flush-259:0	00:15:00	2
110590	99	37	33,3	cyclictest	62529	-21	kworker/u8:0+flush-259:0	20:50:22	2
110590	99	36	32,3	cyclictest	438216	-21	kworker/u8:3+events_unbound	00:29:59	2
110590	99	36	32,3	cyclictest	126099	-21	kworker/u8:1+flush-259:0	19:35:24	2
110587	99	36	31,3	cyclictest	240857	-21	base64	21:15:01	1
110584	99	36	31,4	cyclictest	324312	-21	latency_hist	22:35:01	0
110594	99	35	30,4	cyclictest	252	-21	systemd-journal	23:15:00	3
110590	99	35	31,3	cyclictest	438216	-21	kworker/u8:3+events_unbound	00:30:22	2
110584	99	35	32,2	cyclictest	303084	-21	kworker/u8:2+flush-259:0	00:00:00	0
110584	99	35	28,5	cyclictest	198206	-21	ntpq	20:30:20	0
110594	99	34	28,4	cyclictest	151870	-21	latency_hist	19:50:00	3
110590	99	34	30,3	cyclictest	229940	-21	kworker/u8:3+events_unbound	21:45:15	2
110594	99	33	29,3	cyclictest	126099	-21	kworker/u8:1+flush-259:0	19:40:17	3
110590	99	33	29,3	cyclictest	62529	-21	kworker/u8:0+events_unbound	20:35:20	2
110587	99	33	26,5	cyclictest	177541	-21	ntpq	20:10:22	1
110590	99	32	29,2	cyclictest	261684	-21	kworker/u8:0+flush-259:0	23:05:23	2
110590	99	32	29,2	cyclictest	229940	-21	kworker/u8:3+flush-259:0	21:55:23	2
110590	99	32	28,3	cyclictest	229940	-21	kworker/u8:3+events_unbound	21:25:18	2
110584	99	32	28,3	cyclictest	229940	-21	kworker/u8:3+flush-259:0	21:25:15	0
110590	99	31	28,2	cyclictest	303084	-21	kworker/u8:2+flush-259:0	00:05:16	2
110590	99	31	27,3	cyclictest	95421	-21	kworker/u8:3+events_unbound	19:15:24	2
110590	99	31	27,3	cyclictest	229940	-21	kworker/u8:3+events_unbound	21:40:15	2
110590	99	31	23,6	cyclictest	146689	-21	latency_hist	19:45:00	2
110590	99	30	27,2	cyclictest	370741	-21	kworker/u8:5+flush-259:0	23:35:20	2
110587	99	30	22,6	cyclictest	412060	-21	cp	00:00:00	1
110584	99	30	26,3	cyclictest	252	-21	systemd-journal	23:50:00	0
110584	99	30	25,3	cyclictest	167301	-21	apt-get	20:05:01	0
110584	99	30	0,29	cyclictest	1	-21	systemd	19:11:22	0
110594	99	29	23,4	cyclictest	370741	-21	kworker/u8:5+flush-259:0	23:55:00	3
110590	99	29	26,2	cyclictest	62529	-21	kworker/u8:0+events_unbound	20:10:22	2
110590	99	29	26,2	cyclictest	303084	-21	kworker/u8:2+flush-259:0	23:25:21	2
110590	99	29	25,3	cyclictest	214530	-21	kworker/u8:2+flush-259:0	21:15:00	2
110590	99	29	21,3	cyclictest	334605	-21	kworker/u8:1+events_unbound	23:00:21	2
110587	99	29	25,3	cyclictest	428157	-21	apt-get	00:15:14	1
110590	99	28	24,3	cyclictest	370741	-21	kworker/u8:5+flush-259:0	23:50:18	2
110590	99	28	24,3	cyclictest	370741	-21	kworker/u8:5+flush-259:0	23:45:26	2
110590	99	28	23,3	cyclictest	303084	-21	kworker/u8:2+events_unbound	22:50:15	2
110587	99	28	22,4	cyclictest	313610	-21	latency_hist	22:25:00	1
110584	99	28	22,4	cyclictest	417377	-21	cp	00:05:01	0
110594	99	27	22,3	cyclictest	334605	-21	kworker/u8:1+events_unbound	22:45:22	3
110594	99	27	19,5	cyclictest	172852	-21	apt-get	20:10:00	3
110594	99	27	17,7	cyclictest	241041	-21	cp	21:15:01	3
110587	99	27	22,4	cyclictest	229940	-21	kworker/u8:3+flush-259:0	22:10:01	1
110594	99	26	1,23	cyclictest	872	-21	lldpd	21:05:14	3
110590	99	26	22,3	cyclictest	370741	-21	kworker/u8:5+events_unbound	23:40:25	2
110590	99	26	22,3	cyclictest	303084	-21	kworker/u8:2+flush-259:0	22:15:15	2
110590	99	26	22,3	cyclictest	214530	-21	kworker/u8:2+flush-259:0	21:40:01	2
110584	99	26	23,2	cyclictest	126099	-21	kworker/u8:1+events_unbound	20:40:17	0
110594	99	25	21,3	cyclictest	375870	-21	idleruntime-cro	23:25:00	3
110590	99	25	21,3	cyclictest	105399	-21	kworker/u8:2+events_unbound	19:30:21	2
110584	99	25	19,4	cyclictest	282550	-21	apt-get	21:55:11	0
110584	99	25	18,5	cyclictest	130381	-21	ntpq	19:25:22	0
110590	99	24	21,2	cyclictest	406863	-21	kworker/u8:1+flush-259:0	00:20:17	2
110590	99	24	21,2	cyclictest	214530	-21	kworker/u8:2+events_unbound	21:05:24	2
110590	99	24	21,2	cyclictest	126099	-21	kworker/u8:1+flush-259:0	20:20:21	2
110590	99	24	20,3	cyclictest	303084	-21	kworker/u8:2+events_unbound	22:55:00	2
110590	99	24	20,3	cyclictest	303084	-21	kworker/u8:2+events_unbound	22:55:00	2
110584	99	24	19,4	cyclictest	187858	-21	ntpq	20:20:21	0
110584	99	24	19,3	cyclictest	329726	-21	apt-get	22:40:10	0
110584	99	24	17,5	cyclictest	252	-21	systemd-journal	21:43:22	0
110594	99	23	19,3	cyclictest	433275	-21	apt-get	00:20:12	3
110594	99	23	15,6	cyclictest	281425	-21	ntpq	21:50:21	3
110590	99	23	20,2	cyclictest	62529	-21	kworker/u8:0+flush-259:0	21:00:25	2
110590	99	23	20,2	cyclictest	370741	-21	kworker/u8:5+flush-259:0	23:55:24	2
110590	99	23	20,2	cyclictest	229940	-21	kworker/u8:3+flush-259:0	21:52:04	2
110590	99	23	19,3	cyclictest	370956	-21	/usr/sbin/munin	23:20:13	2
110590	99	23	19,3	cyclictest	261684	-21	kworker/u8:0+events_unbound	22:14:59	2
110590	99	23	19,3	cyclictest	126099	-21	kworker/u8:1+events_unbound	20:17:23	2
110590	99	23	17,5	cyclictest	417184	-21	apt-get	00:05:00	2
110584	99	23	19,2	cyclictest	1	-21	systemd	22:55:00	0
110594	99	22	17,3	cyclictest	126099	-21	kworker/u8:1+flush-259:0	20:00:17	3
110594	99	22	15,5	cyclictest	395626	-21	ntpq	23:40:20	3
110590	99	22	15,5	cyclictest	156990	-21	latency_hist	19:55:00	2
110584	99	22	16,4	cyclictest	240678	-21	apt-get	21:15:01	0
110584	99	22	16,4	cyclictest	141532	-21	latency_hist	19:40:00	0
110594	99	21	16,3	cyclictest	229940	-21	kworker/u8:3+flush-259:0	21:40:15	3
110590	99	21	18,2	cyclictest	62529	-21	kworker/u8:0+flush-259:0	19:55:24	2
110590	99	21	18,2	cyclictest	303084	-21	kworker/u8:2+events_unbound	22:25:12	2
110590	99	21	17,3	cyclictest	62529	-21	kworker/u8:0+events_unbound	19:29:57	2
110590	99	21	17,3	cyclictest	62529	-21	kworker/u8:0+events_unbound	19:11:33	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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